Showing posts about "ore"
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.
You have to shift your point of view if you feel you're laking the power wanted and the motivation needed. By training your thoughts to concentrate on the bright side of things, you are more likely to have the incentive to follow through on your goals. You are less likely to be held back by negative ideas that might limit your performance.Your life can be enhanced, and your happiness enriched, when you choose to change your perspective on Hongxing hammer crusher. Don't leave your future to chance, or wait for things to get better mysteriously on their own. You must go in the direction of your hopes and aspiration. Begin to build your confidence, and work through problems rather than avoid them. Remember that power is not necessarily control over situations, but the ability to deal with whatever comes your way.Always believe that good things are possible, and remember that mistakes can be lessons that lead to discoveries. Take your fear and transform it into trust; learn to rise above anxiety and doubt. Turn your 'worry hours' into 'productive hours'. Take the energy that you have wasted and direct it toward every worthwhile effort that you can be involved in. You will see beautiful things happen when you allow yourself to experience the joys of life. You will find happiness when you addopt positive thinking into your daily routine and make it an important part of your world. cement machinery:http://www.china-hxjq.com/p75.html
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May you find peace in simple things, because those are the ones that will always be there.
May you realize the importance of patience and accept others for what they are. With understanding and love, you'll find the good in every heart.
May you have faith in others and the ablity to be vulnerable. Open your heart and really share the miracle of love and intimacy.
May every day of your life bring you fresh hopes for tomorrow---because hopes give us all our reason for trying.
May each new day bring a feeling of excitement, joy, and a wonderful sense of expectation. Expect the best, and you'll get it.
May you remember the good times and forget the sorrow and pain, for the good times will remind you of how special your life has been.
May you always feel secure and loved, and know you are the best.
May you experience all the good things in life---the happiness of realizing your dreams, the joy of feeling worthwhile, and the satisfaction of knowing you've succeeded.
May you find warmth in others, expressions of love and kindness, smiles that encourage you, and friends who are loyal and honest.
Above all, may you always have positive thoughts.
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The metal ore mining industry segment covers the extraction of metal ores, primarily gold, silver, iron, copper, lead, and zinc. These naturally occurring minerals have a variety of industrial purposes: gold and silver are primarily used in jewelry and high-end electronics, iron is used to produce steel, copper is the main component of electrical wiring, lead is used in batteries, and zinc is used to coat iron and steel to reduce corrosion and as an alloy in the making of bronze and brass.
The process of mining cone crusher the earth and finding the metals, minerals, etc and again making the earth to return back to its original state consists of different steps. Generally, mining techniques can be broadly classified into two types, they are Surface Mining and Underground Mining.
In pre-historic period, when the people had found metals like copper, iron on or close to earth surface, they used to manufacture some tools and weapons.
The ancient known mine is the “Lion Cave” which is in Swaziland. Ancient people used hammers, crude picks, etc. But they found very difficult to find the metals or any other precious stones which was in too deep. So they slowly started to invent new ideas to make the work simple. Since there is no blasting method available in that period, they first used to keep fire on the hard rocks to make it soft then they used water to cool it up and so they had broken those hard rocks easily.
The slaves, prisoners of war and the people who did criminal things had forced to work on the mining areas. And the kids were used to carry the ores from the underground mining area to the outer surface. Then the people who are so weak to work underground had made to separate the rich and poor metals.
In some countries they used “Black Powder” to disclose ore veins and earth to loosen. Then as the development occurs, the people have found a plenty of techniques to find the metals, minerals and other precious stones.
Magnesium is the third most used metal, following iron and aluminium. Magnesium derives its name from magnesite, a magnesium carbonate mineral, and this stone in turn is told to owe its name to magnesite dumps found in Magnesia, a region in the antique Greek region of Thessaly. The British chemist Humphry Davy is said to have manufactured a mixture of magnesium in 1808 by electrolyzing damp magnesium sulfate, utilizing mercury as a cathode. bucket sand washer:http://www.hxjq-crusher.com/16.html
The 1st victorious industrialized manufacture was begun in Germany in 1886 by Aluminum und Magnesium fabrik Hemelingen, depending on the electrolysis of molten carnallite. Hemelingen later became constituent of the industrial compound IG Farbenindustrie, which, for the duration of the 1920s and ’30s, urbanized a process for manufacturing huge quantities of molten and fundamentally water-free magnesium chloride (now branded as the IG Farben process) as well as the expertise for electrolyzing this merchandise to magnesium metal and chlorine.
Mining and concentrating
Both dolomite and magnesite are hauled out and concerted by conservative methods. Carnallite is hauled out as ore or alienated from other salt amalgams that are brought to the exterior by solution mining. Naturally happening magnesium including brines are determined in large ponds by solar desertion.
Extraction and refining
A physically powerful chemical reagent, magnesium structures steady compounds and responds with oxygen and chlorine in equally the liquid and gaseous status. This means that taking out of the metal from unrefined materials is a force exhaustive procedure requiring nicely tuned technologies. Commercial construction pursues 2 completely dissimilar methods: electrolysis of magnesium chloride or thermal lessening of magnesium oxide. Where power charges are stumpy, electrolysis is the cheaper means and, undeniably, it accounts for something like 75 percent of world magnesium production.
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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
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.
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In recent years, South Korea has entered the ranks of the industrialised world and joined the Organisation for Economic Cooperation and Development (OECD) on the back of tremendous industrial flotation cell success. Its economy has grown 30-fold since 1980 with GDP per capita now well over US$20,000.
However, this success was based on a high-energy and high-carbon model: its per-capita energy use continues to rise and is above its regional peers, China and Japan. Carbon emissions have more than doubled since 1990 on the back of industrial growth and now rank ninth in the world. South Korea’s carbon intensity is now the second highest of the G20 developed economies.
Another problem is that South Korea relies on imports – over 96% – for its primary energy needs. In 2011, energy imports cost over US$173 billion, more than the nation’s total exports of ships, semiconductors, mobile phones, LCDs and computers together. Primary energy in South Korea is also highly reliant on fossil fuels, mainly petroleum but also coal and liquid natural gas (LNG), which continues to supply over 80% of primary energy.
Oil now accounts for one-quarter of imports by value, and the reality of high crude prices poses a strategic risk for the economy, especially as energy costs remain controlled to underpin industrial competitiveness.
High energy usage, compounded by the rising cost of energy, the extreme reliance on imports, the doubling of carbon emissions since 1990 and South Korea’s emergence as a developed country called for a change in the structure of its economic growth – from economic to sustainable development. During the build-up to the UN climate talks in Copenhagen in 2009, and as the clean-tech sector boomed, the newly elected president Lee Myung-bak made green growth a cornerstone of his administration, introducing the green growth plan in 2008. stone crusher:http://www.crusher-machine.com/1.html
President Lee also outlined a non-binding political target to reduce greenhouse-gas emissions by 30% from 2020 business-as-usual levels, which translates into around a 4% reduction on its 2005 emissions – quite a break with historical trends.
South Korea’s existing strength in batteries, LEDs, smart grid and nuclear provide the foundation for the green-growth plan. The government defined new growth industries and new technologies as the engines to drive green growth and is keen to nurture them with research and development (R&D). In 2009, two trillion won (US$1.8 billion) was invested in green R&D, and this increased to 2.3 trillion won (US$2.1 billion) in 2010.
New technologies, such as technology for enhancing the efficiency of appliances and fuel cells, are the major recipients of this investment, receiving an estimated one-quarter of the total government R&D budget.
South Korea is also a strong trading nation; in 2011, its external trade (value of exports plus imports) reached US$1 trillion, equivalent to 83% of GDP. In reaching this milestone, South Korea has become a leader in technology exports. For example, Samsung televisions now account for one in five sets sold throughout the world, with LG televisions one in 10, displacing Japanese television makers who have traditionally held the largest market shares.
As the professional manufacturer of complete sets of mining machinery, such as cement production line, Henan Hongxing is always doing the best in products and service.
High Pressure Grinding Mill is based on five years resarch on the traditional grinding mills, which is different from raymond mill. The High pressure suspension Grinding Mill got national patent and CE certificate, features of high efficiency and energy saving. It has created a new era of high efficiency and low energy consumption in international mill industry. Our high pressure mill is the ideal equipment for grinding quartz, feldspar, calcite, limestone, talc, china, marble, granite, dolomite, barite, bentonite, coal gangue, coal and so on. One or both of the pulleys are powered, moving the belt and the material on the belt forward.
Features and Benefits :
1. Compared with the common Raymond grinding mill under the same power conditions, the capacity can be increased by 10%, under the performance of high-pressure springs, the rollers grinding pressure on raw materials can be raised by 1500kgf.
2. All the mineral materials with Mohs hardness below 9.3 can be crushed.
3. The final product size ranges from the maximum particle diameter of 0.95mm (20mesh) to the finest diameter of 0.038mm (400 mesh). A few materials can reach 0.013mm (1000 mesh).
4. Its dust-removing effect fully meets the national dust discharge standard.
5. The classifier is easy for adjustment.
6. The grinding device adopts a superposition multi-grade sealing with good sealing performance.
Working Principe of High Pressure Suspension Grinding Mill
The whole system of High pressure Grinding Mill consists of main frame, decelerator, classifier, piping device, blower, jaw crusher, dustpan elevator, electromagnetic vibration feeder, and electric switch box , motor, etc.
1, Materials are firstly crushed by the jaw crusher; then the crushed materials is transferred to a hopper by the elevator and fed uniformly, quantitatively and continuously by the vibration feeder in the grinding chamber of the main frame for grinding. The grinding particles are brought up by the air current of the blower into the classifier for classification. The particles with the required fineness are brought up by the air current through the pipe into a cyclone collector for separation and collection and the finished particles are discharged from a pipe outlet. drum dryer:http://www.hx-crushers.com/p71.html
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2, Due to some moisture contained in the materials to be grinded, the heat resulting from grinding leads to the vaporized air which changes the airflow volume. Moreover, the outside air inhaled from the narrow gaps, of the piping connections can increase the volume of air current. Therefore, it is necessary to adjust to redundant air pipe between the blower and the main unit for keeping the balance of the air current. The redundant air is then guided into a cloth bag of a dust cleaner to collect the fine powder in the air. And the redundant air is discharged after purification.
3, the main unit runs with a central shaft is driven by a transmission device. The top of the shaft is connected with a quincunx stand, on which a grinding roller is installed to form a swing support, the grinding roller not only rotates around its own axis due to the friction, it also rotates around the ring.
4, The classifier performs the function of classifying the particles by the rotation of blades on the disk driven by a speed-adjustable motor. The rotation speed of the blades is regulated according to the particle size of the finished powder. The coarse particles drop because of self-gravity into the grinding chamber for regrinding. The qualified particles go through the blades and are inhaled by the air current into the cyclone. Then the particles are separated from the air current and collected.
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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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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.
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.
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
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.