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Environmental Protection is quite familiar to everyone, even the kindergarten children know that” We should try our best to protect our motherland” .Environment is very important to people just like the air to people, even though we not feel the exits of it, we cannot live without it.

It was commonly believed that the development of economy and environmental protection is a contradictory issue. If we want to protect the environment, we have to limit the development of economy; we develop the economy at the expense of the damaging our environment. Which is more important? The prosperity of our country cannot go without the development of economy; the existing of human being cannot go without comfortable environment. From the perspective of the original and basic condition of existence, environment is more important. However, in the times where social advancement and rapid development of technology, we will be eliminated by society without strong economic strength. This requires that we should not only develop economic but also protect environment.

The heavy industry does great harm to the environment, but it is the pillar of the economic; therefore, the top priority is to solve the environmental problems caused by heavy industry. The development of mining machine is one of the direct branches in heavy industry; Enhancing the environmental protection in mining exploitation and following the sustainable development are the fundamental solution to the environmental issues caused by heavy industry. Taking effective measures and strictly controlling the mining pollution, land destruction and soil erosion caused by the mining exploitation, which will minimize the environment costs of utilization of mineral resource. We should adhere to the principle of “Those who develops should be responsible for protecting, those who pollutes should deal with it” and resolutely implement the system of land rehabilitation. We must regard environmental protection in mining areas as the important content of mining’s supervision and management and realize the consistency between mining exploitation and environmental protection, comprehensive treatment and sustainable.Henan Hongxing Mining Machinery Co., Ltd is the professional manufacturer of complete sets of mining machinery, for example,primary jaw crusher,rotary kiln Welcome all of you to visit our official website.china dryer:http://www.china-hxjq.com/p71.html

It is very important to formulate environmental protection policy. Selecting the environmental-friendly equipment is the concrete manifestation of putting the environmental protection theory into practice. Efficient energy saving equipment can not only meet the production needs but achieved the effect of environmental protection, which can be called ”kill two birds with one stone”. Henan Hongxing Machinery Co., Ltd, which is located at the High & New Technology Industries Development Zone of Zhengzhou, is the professional manufactures in producing the technical environment-friendly set. Welcome all of you to visit our factory and select your ideal equipment.

There are two characteristic about iron resource:

(1) Many lean ore, the reserves of lean ore accounts for almost 80% of the total reserves.

(2) More Symbiotic multi-element composite ore. In addition, the ore body is quite complex. It is troublesome in iron dressing because the upside of some the poor iron ore bed is hematite, but the lower part is magnetite. Iron ore, which was selected by the following procedure such as crushing, grinding, magnetic, flotation and reselection, is the important raw material in steel production enterprise. Features of China’s iron ore and the higher demands of steel industry to iron ore concentrate put forward the new challenges to dressing workers. Crushing machine has more development requirements to processing technology of metallurgical mining, which greatly promotes the further progress of dressing machine.

Beneficiation process should be highly efficient and simple, for example, grasping the development of energy saving set and trying your best to achieve best result through the most suitable processing. In dressing plant, the proportion used in equipment investment of crushing and grinding task, production cost, electricity consumption and steel consumption is the biggest. Consequently, the economic benefit is largely determined by the selection of crushing and grinding set and the quality of operation and management.flotation separator:http://www.hxjq-crusher.com/34.html

The common crushing machine or grinding set used in beneficiation concluding: jaw crusher, impact crusher, ball mill, ladder-shaped type grinding mill, ultrafine grinding mill and vertical grinding mill. Large-scale crushing machine is the key product in Hongxing Company. Among the beneficiation set, jaw crusher is mainly used for the initial crushing of the ore material. Due to the harsh environment of jaw crusher, it is necessary to utilize or strength the constitution and masters the essential maintenance knowledge for improving the efficiency and stability of set. Large jaw crusher consists of frame, eccentric shaft, pulley, flywheel, moving jaw, side guard plate, toggle plate, back seat of the bracket, adjust gap screw, reset spring, fixed jaw plate and activities of jaw and other structure.

Large jaw crusher produced by our company has the following advantages: large crushing ratio, uniform particle size, reliable and convenient, wide range of adjustment, high efficiency, energy saving, low noise and less dust.

Iron ore is any rock that contains a usable quantity of iron. Common iron ore minerals include hematite, magnetite, limonite, and siderite. These are frequently found together with assorted silicates. Although iron does not occur in its pure form in nature, some kinds of iron ore contain up to 70% iron atoms. Iron ore consists of oxygen and iron atoms bonded together into molecules. To create pure iron, one must deoxygenate the ore, leaving only iron atoms behind. That is the essence of the refining process.

To create an even purer form of iron, known as pig iron, limestone must be added to the mix and the heat increased. This is done contemporarily in the silo-like structure known as a blast furnace. The calcium in limestone bonds with the silicates in the ore, creating a material called slag, which floats on top of the pure liquid iron. The iron is periodically drained into a mold from a port at the bottom of the blast furnace, where it cools. The pig iron can then be converted into wrought iron by mixing it with silicon, or processed further to create steel.

Iron ore impact crusher production of steel as one of the most important raw material, its development for the development of steel has a very big impact, but can also promote the development of steel iron ore mine development. China is the largest producer of steel, but also iron ore consumer. With the rapid economic development, China’s demand for iron ore increased substantially.

Shanghai, Tianjin and Beijing and other cities in export-oriented steel consumption has reached the level of South Korea and other developed countries, but the real appeal is that the needs of China’s inland provinces and cities just beginning to rise. Currently, the central and western China’s per capita steel consumption in coastal areas even less than half. Chinese government to narrow the wealth gap, increasing the infrastructure of the western investment, this policy will also boost demand for steel. China will continue to drive the next period of global iron ore demand, it is to open up the west ore market. stone jaw crusher:http://www.hxjqchina.com/product-list_11.html
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Industry estimates, in eastern China’s steel output will peak in 2015, but the central and western regions will continue to grow. The next few years will continue to tight global iron ore supply. Based on national policy to promote, while China’s east coast closer to the peak business, the world’s biggest iron ore producers are seeking to enter China’s underdeveloped western regions, looking for its future growth potential. Xinjiang, western China’s industrialization and urbanization, the demand for steel will increase substantially, the Chinese demand for iron ore imports remain high, and constantly open up the region’s iron ore market.

Now the country’s development, rely on the technology continues to rise, so that not only saves resources, make full use of resources, but also energy saving, more rapid development. The current state of the majority of the market for iron ore and other mineral resources, needs, and gradually promote the crusher and other mining machinery industry, which not only has to open up the market, the technical requirements but also be promoted. This can lead mining crushers and other mining machinery industry forever at the forefront of sustainable development and better.

As the professional manufacturer of complete sets of mining machinery, such as spiral separator, Henan Hongxing is always doing the best in products and service.

Iron ore beneficiation process flow chart usually includes three stages: they're crushing raw iron ore to small contaminants, grinding iron ore contaminants to small powders and focusing the accessible iron ore.

The preparatory work for ore beneficiation includes crushing and screening, ore grinding and classification, and some ore dressing plants also include pre-concentration and ore washing process. The main purpose of this preparatory work is to realize the monomer separation of useful minerals and gangue minerals and the monomer separation of all kinds of useful minerals and provide proper dressing granularity for the ore beneficiation work.

(1) Crushing process. Crushing is a process in which large-sized materials become smaller in granularity under the effect of mechanical force. Its main role is preparing qualified dressing granularity for the ore beneficiation work, or providing the most suitable dressing, stone materials as fired and practical granularity for the dressing or metallurgy users.

In the practical production of mining industry, the widely used crushing methods at present are still predominated by mechanical force crushing, including crushing, cutting, breaking, grinding and impacting, and the non-mechanical force crushing such as ultrasonic crushing has not been in application in the industrial production yet.

(2) Screening work. The process of separating the mixed materials of different sizes according to their granularity level is called screening. Two products can be obtained by screening: one is above screen products whose granularity is smaller than the screen hole so that they are able to go through the screen surface, and the other is under screen products that are left on the screen surface. In order to make the screening process come true, the materials should do relative motion on the screen surface, the purpose of which is on one hand to keep the material layers on the screen surface in a loose state and to produce layers according to the granularity, and on the other hand, the motion of the materials and the screen promotes the materials that block the screen mesh to break away the screen surface which will help the materials go through the screen mesh. wet magnetic separator:http://www.hx-crushers.com/p56.html
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(3)Re-election

Re-elect the current structure, used only for sorting simple, containing coarser cloth of manganese ore, especially for the oxidation of high density manganese ore. Common methods of heavy media beneficiation, ore dressing and shaking jig beneficiation. At present, China dealing with oxidation of manganese in the process, the general is broken ore to 6 0 mm or 10 0 mm, and then grouped for jigging coarse level and fine level of delivery shaking election. Equipment mostly Haz reciprocating jig and 6 - S-type shaker. $

(4). High Intensity Magnetic Separation

Manganese mineral is weakly magnetic minerals than the susceptibility in the magnetic field intensity Ho = 800 1600 kA / m (10000 20000 oe) of the strong magnetic field sorting machine can be recovered, the general can improve the grade of 4% Manganese 10%. As the magnetic separation of simple and easy to control, adaptability, can be used for sorting a variety of manganese ore, manganese ore dressing in recent years has been dominated. New types of coarse, medium and fine magnetic machine has been developed and successfully. Currently, the domestic application of manganese is the most common particle strong magnetic separator, coarse and fine intensity magnetic separator is gradually applied, micro-fine intensity magnetic separator is still in the testing stage.

As the professional manufacturer of complete sets of mining machinery, such as magnetic drum separator, Henan Hongxing is always doing the best in products and service.

Iron ore is an important iron and steel producers of raw materials, natural minerals (iron ore) after crushing, grinding, magnetic separation, flotation, gradually re-election and other procedures selected iron. In theory, any compound containing iron or iron ore can be called the iron ore; However, in industry or business, the iron ore and manganese different, not only to contain iron

ore composition, and Caixing must have use value.

Ore crushing and grinding: concentrator generally coarse broken, broken in three sections of broken and fine crushing of iron ore crushing process. The crushing is the two sections of a closed-circuit process. The largest raw ore block is 400 mm and is lift and unloaded into the concentrator coarse ore bin. Using electromagnetic Vibrating Feeder into the first paragraph of 600 * 900mm jaw crusher. Ore is broken to-150mm, the 1230 double-layer vibration sieve washing and screening for the three-level: -150-30 mm particle size ore sieve washed again hand-picked, 28-18mm grain-grade ore into the second paragraph of the broken and all crushing to-18mm, by spiral classifier desliming, back into the fine ore storage .

The slime after the dewatering in a thickener, separatly carry out the flotation processing.Rough broken 1.2m or 1.5m multi-cycle crusher, in breaking with 2.1m or 2.2m Standard cone crusher, fine break by 2.1m or 2.2m short head type cone crusher. Through the thick broken ore, the block is no more than 1m, and then through the medium and fine crushing and screening into the small particle size of ore 12mm to send the final product in the grinding slot. stone crushing plant:http://www.hx-china.com/33.html
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Grinding process: iron ore grinding process, the majority of two-stage grinding process, a small processing plant to use more grinding process. As a result of fine grinding and then screening of new technology, in recent years, has two grinding concentrator Grinding into three sections. grinding equipment used in general is relatively small.

Followed by the sorting techniques: magnetite beneficiation. As the ore magnetic and strong, good selection good grinding, magnetic separation plant are used stage grinding and multi-stage grinding process, the coarse-grained disseminated magnetite by the former (a mill Mine), fine-grained, micro-fine disseminated magnetite with the latter (Sec or three grinding). beneficiation

technology for magnetic roasting, wet high intensity magnetic separation, the weak magnetic processes such as flotation and re-election , Equipment and new varieties of pharmaceutical

research continue to improve, so that the concentrate grade, metal recovery continues to increase.

Magnetic separation occupies an attractive position in the field of magnetite ore beneficiation. It is a simple effective method, used for some 150 years and steadily growing more important. This type of beneficiation originated in 1792, when William Fullarton was issued a British patent covering the separation of iron ore by magnetic attraction.

As the professional manufacturer of complete sets of mining machinery, such as mobile crushers, Henan Hongxing is always doing the best in products and service.

As we enter the 21st century which is regarded as an age when economy makes breakthrough, but at the same time along with the rapid economic development, environmental pollution has emerged. It brings about increasingly serious threnten day by day. In order to reducing pollution in production, many fields are trying their best to find environmental friendly production way. Hongxing Mining Machinery company, since established, has always been devoted to impact crusher innovation and put emphsis on environment protection.

Most of the firms have considerably enhanced their project recital with project management trainings and kinds of methodologies. This leads in decreasing the level of risk management upto zero. People in such firms have learned the management training and conclude that the projects work more better when the team is smaller and include meticulous connections or communications, regimented kind of project management, and standardized tools of project management.

In cement production process, cement crusher is very important since most of the raw materials will have to be crushed before being used to process cement, such as limestone, clay, iron ore and coal, etc. Limestone is the largest amount of raw material during cement production.

Market demands is our motivation and technology innovation basis. Because of rich technology experience and new thechnic application, our products get ahead of international advanced level and superior to other products in technology, work performance, reliablity and machine maintenance. Nowadays, there are some manufacturers reducing production costs by using inferior quality steel, so that they make more profits from it. As a result, their produced machine is fragile and easy to break down, not to mention be up to customers' requirements. And then those manufacturers bring the machine price down. After buying the poor quality machine, customers has to spend more repairing the equipments. It is obvious that the customer's right can not be ensured and the service is also poor. While, what makes customers glad is that domestic stone crushing lines are planing to reduce the production cost to gain low profits salesment. However, professional service attitudes and deep social responsibility is our power to research mining machinery. We pay more attention to reducing energy sonsumption and environmental pollution while improving product quality and efficiency. We will do our best to realize green production and sustainable development. limestone rotary kiln:http://www.hx-china.com/19.html
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In addition to technology dedication, Hongxing company also attaches importance to service and enterprise management, which is looked as source of sustainable development. Inside the company, we have a whole service and management mode as well as strictly quality inspecting system. All of that makes a trong basis for earning popularity at home and abroad.

Faced with increasingly growth of market demands, Hongxing company looks forward to more orders from new and old customers from home and abroad on the basis of high quality, better service, innovatin and practical. We are well ready to provide you with superior products and service. We take our responsibility and obligation given by country, we will be continue persisting on ball mill innovation developing road. We wil strive to make more efforts to society and environment protection to make win-win development. That will make a developing way that is good for economic benefits and environmental friendly.

As the professional manufacturer of complete sets of mining machinery, such as cement rotary kiln, Henan Hongxing is always doing the best in products and service.

Very low grade Iron ore cannot be used in metallurgical plants and needs to be upgraded to increase the iron content and reduce the gangue content. A process adopted to upgrade ore is called Beneficiation. Iron ore is upgraded to a higher iron content through concentration. Iron ore is being beneficiated all round the world to meet the quality requirement of Iron and Steel industries. However, each source of Iron ore has its own peculiar mineralogical characteristics and requires the specific beneficiation and metallurgical treatment to get the best product out of it. The choice of the beneficiation treatment depends on the nature of the gangue present and its association with the ore structure. Several techniques such as washing, jigging, magnetic separation, advancedgravity separation and flotation are being employed to enhance the quality of the Iron ore.

Due to the high density of hematite relative to silicates, beneficiation usually involves a combination of crushing and milling as well as heavy liquid separation. This is achieved by passing the finely crushed ore over a bath of solution containing bentonite or other agent which increases the density of the solution. When the density of the solution is properly calibrated, the hematite will sink and the silicate mineral fragments will float and can be removed.

The extract the metal from ores, several physical and chemical methods are used. The method used depending upon chemical properties and nature of the ore from which it is to be extracted. It involves four main steps:

1. Crushing and grinding of the ore.

2. Concentration or dressing of the ore.

3. Reduction to free metal.

4. Purification or refining of the metal.

Iron ore crusher is a important step in iron ore crushing plant, Hongxing can provide clients with quality assurance of iron ore crusher, thereby enables the iron ore more fit the needs of customers, more economical, more convenient. Jaw crusher, impact crusher, Cs series cone crusher,etc. Such this ore crusher can used as iron ore crusher. rock crusher:http://www.hx-china.com/1.html
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Hongxing Machinery Company produces several series iron ore crusher, of which cone crusher and mobile crusher fits for processing this ore best. Iron ore cone crusher is one of the most high efficiency iron ore crusher. Comparing with other iron crusher, iron ore cone crusher with high-efficiency has excellences for iron ore crushing, high productions and low maintenance. The long force arm designed into the cone provides greater iron ore crushing force.

Hongxing is a iron ore machine manufacturer in China, and supplies rock crushers and grinding mills for ore beneficiation plant such as iron ore crusher, copper ore crusher, manganese ore crusher. Hongxing provides iron ore mining equipments for sale with best price in Australia, Brazil, India, Canada, USA, Ukraine, Liberia, Russia, Sweden, France, South Africa and other countries.

The most commonly used crushers and grinding mills in iron ore crushing and grinding process for iron ore mining are jaw crusher, cone crusher, hammer crusher and ball mill, ultrafine grinding mill, etc. In iron ore mining, miner usually choose a complete iron ore crushing plant for metallurgy. At present, the most popular iron ore production line consists of two jaw crushers. After beening crushed, the material will be transported for the magnetic separation, and then into the ball mill for grinding.

As the professional manufacturer of complete sets of mining machinery, such as classifier, Henan Hongxing is always doing the best in products and service.

In our modern society, iron is the most frequently-used metal, of which the iron ore is the key factor with 95% of the using metal. Iron is mainly used in structural engineering application and maritime affairs use, car industry and common industry. It is universal in the world that the rock is rich in iron. The classification & features of iron makes iron variety in the rocks which constitutes the crustal. There are more than 300 kinds of iron ore which have been already known clearly but only 20 kinds can be taken as the raw material for pudding. According to its shape iron ore can be classified as hematite, magnetite, limonite, siderite, etc. The common iron ore mining equipment are jaw crusher, cone crusher, hammer crusher, ball mill, fine grinding, etc. Often workers prefer to choose a metallurgical plant which possesses a complete iron ore crusher plant. So far, the most popular iron ore production line combines two jaw crushers with sand making machine, and later the material is sent for magnetic separation and grinded into the ball mill.

Hongxing Mining Machinery manufactures several series iron ore crusher, which is suitable for iron ore especially the mobile crusher and cone crusher. Iron ore cone crusher is a high efficiency crusher with the advantage of high output and low safeguard. And the long head type cone designing provides more crushing power for iron ore.

Mobile iron ore crusher is based on the Hongxing’s traditional design, and completely adopts every condition to crush the iron ore, which has eliminated the obstacle of position, environment and foundation architecture so the simple, high efficiency and low costing equipment is developed by Hongxing. Our iron ore mobile crusher includes cone crusher, mobile crusher, impact crusher series plant, jaw crusher series plant and crawler type mobile crusher plant. This series crusher provides customers the simple, high efficiency and low cost machine genuinely. Impact crusher:http://www.hx-china.com/3.html
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PF Series Impact Crusher is a new product that absorbs advanced technologies at home and abroad. This Series equipment is applicable to crush the material with size less than 500mm and compression strength less than 320 MPa ( eg: granite, limestone, concrete etc.). With its excellent performance, Impact Crusher is widely used in highway, hydroelectric, artificial stone and sand, crushing and building material industry etc.

Mining crusher machinery is configured to break down very hard material, such as stone, into small rocks, gravel, or stone powder. Mining crusher machines are used to reduce raw material, such as mined ore, which are extremely hard to break down. Mining crusher machines essentially apply mechanical force and pressure to these raw materials enabling their break down at an efficient pace and rate of processing. Mining crusher machinery consists of heavy mining equipment which applies tremendous force to hard materials.

As the professional manufacturer of complete sets of mining machinery, such as impact crusher, Henan Hongxing is always doing the best in products and service.

China will strengthen the establishment of an assurance system for iron ore resources to ensure the steady development of the steel industry during the 12th Five-Year-Plan period (2011-2015), the Ministry of Industry and Information Technology said on Monday.

Ensuring the supply of raw materials for steel mills - including coal and iron ore - will be an essential goal over the next five years, said Luo Tiejun, deputy director of the ministry's Department of Raw Materials.Luo commented during an industry event in Tianjin.China should accelerate the overseas iron ore projects that domestic companies have invested in over the past few years.

'We have invested in many iron ore projects in Australia and Africa, but few have reached large effective production capacities,' he said.

According to the ministry, China aims to have an additional 100 million tons of overseas iron ore magnetic separator capacity by the end of 2015.'Domestic iron ore demand was high during the first nine months and imports during the period increased 11.5 percent,' said Luo.'The number of countries that export iron ore to China keeps growing and has risen from 48 to 63,' Luo said, without giving pecific data.

He said China should make full use of iron ore resources in nearby countries, where there are abundant reserves.'For instance, two steel companies in Heilongjiang province imported about 7 million tons of iron ore in 2011, 4 million tons more than last year,' Luo said.The government encourages domestic steel mills to explore resources cooperatively with foreign countries to realize better global resource distribution.

'Mining resources have become the essential element for energy security and sustainable development for all countries,' said Zhu Jimin, chairman of Shougang Group, one of China's largest steel companies, also speaking in Tianjin.China's steel production capacity has increased from 100 million tons in 1996 to about 700 million tons at present, spurring rapid growth in iron ore and coal demand, said Zhu.However, domestic iron ore mines only supplied 32 percent of demand, with imports of 618 million tons in 2010, he added.'The assurance system for iron ore resources will help the supply situation for domestic steel makers, but a market-oriented mechanism is required to ensure the fairness of the system,' said Xu Weidong, managing director of Tianjin Zhongtian Hongda International Trade Co Ltd, a State-owned resources trading company.'The system helps keep iron ore prices more stable to some extent, but it requires a long time to take effect,' he said.According to the ministry's announcement, China will eliminate hundreds of small steel companies over five years through mergers and acquisitions. At the end of the five-year period, the total output of the top 10 steel companies will increase from 48.6 percent to 60 percent. ball mills:http://www.hx-crushers.com/p72.html
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Meanwhile, the government will implement policies to encourage steel companies to establish mills abroad and expand their overseas business, with the aim of forming world-class companies in the industry.

As the professional manufacturer of complete sets of mining machinery, such as vibrating screen,rotary kiln, Henan Hongxing is always doing the best in products and service.

The High efficiency concentrator machine of our company is suitable for dehydrating water of the concentration and gangue in the concentrating factory, make the mash of 20-30% raise up to 40-70% about. It is widely used for melting, chemical, coal, non metal concentration, environment protected etc industry. Actually, High Efficiency Concentrator is not a single sedimentation equipment, is a new-type dewatering equipment combining with the filtering property of mud layer.

The concentrator mainly blows the trigger two parts by the circular concentration basin and the rake type to be composed. In the concentration basin aerosol subsides in the pulp solid particle under the action of gravity, upside becomes the clear clear water, enables the liquid-solid to separate.

Working principle

Add certain amount of congeal dose into the ore slurry which need to be concentrated, make the granules form a roll, quicken the falling speed and complete the process of concentrating.

Characteristics:

1. Fast concentration speed, saving much time.

2. Install inclined plate to shorten the sedimentation distance of particles so as to increase sedimentation area.

3. Large capacity of material processing, and high efficiency.

4. Applied the complete automatic technology from abroad, advanced technology, easy operation.

5. The increase flocculant increases the subsidence solid particle the particle size, thus speeds up the settling rate.

6. Installs leans the sloping plate to reduce the ore grain of subsidence distance, increases the settling area.

7. The display mud deposits the thick level flocculation, the filtration, to reduce and to enhance the process load the function.

Concentrator plays an important role in ore beneficiation which has taken an important position in aligning plant strategies. Leading professionals from the industry have decided to put in efforts to spot ways to make the process more efficient, aiming at zero waste management for sust. Iron ore processing plant is also important in processing phosphate, titanium, chrome, manganese, tungsten, molybdenum, nickel, niobium and tantalum ores.

Iron ore beneficiation preparation

Very low grade Iron ore cannot be used in metallurgical plants and needs to be upgraded to increase the iron content and reduce the gangue content. A process adopting to upgrade ore is called Beneficiation. Iron ore is upgraded to a higher iron content through concentration. Iron ore is being beneficiated all round the world to meet the quality requirement of Iron and Steel industries. However, each source of Iron ore has its own peculiar mineralogical characteristics and requires the specific beneficiation and metallurgical treatment to get the best product out of it. The choice of the beneficiation treatment depends on the nature of the gangue present and its association with the ore structure. Several techniques such as washing, jigging, magnetic separation, advanced gravity separation and flotation are being used to enhance the quality of the Iron ore.

Due to the high density of hematite relative to silicates, Ore separating line usually involves a combination of crushing and milling as well as heavy liquid separation. This is achieved by passing the finely crushed ore over a bath of solution containing bentonite or other agent which increases the density of the solution. When the density of the solution is properly calibrated, the hematite will sink and the silicate mineral fragments will float and can be removed.

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