Showing posts about "mining"
Mobile crushing line solves the disadvantages that traditional crusher cannot move, and has achieved that fixed large-scale machinery is free to move. But mobile crushing production line has a higher technical requirements, Hongxing Heavy Industry has took a lot of time to manufacture the mobile crushing plant. While learning advanced technology, we manufacture mobile crushing line combined with customers' demand characteristics.
The design concept of mobile crushing line is standing the customer's position, to eliminate crushing barriers that worksite, environment, complex basic configuration and complicated logistics bring. We put it as primary solution, and provide customers with simple, efficient, low-cost mobile crushing equipments. Depending on different mobile crushing process requirements, mobile crushing production line can be composed to two crushing and screening system that including coarse crushing and fine crushing. Mobile crushing line also be composed to three crushing and screening system, and has higher flexibility. It can meet different customers' needs.
Mobile crushing line not only has many functions, but also its features are the important reason that attracting customers' attention. But the price of mobile crushing line is higher so that many customers don't want to buy it. Mobile crushing production line is mainly used for processing sand stone materials and concrete materials. At present, manufactured sand has been replaced natural sand, and it is mainly made up of stone materials. Stone materials are non-renewable resources. When the raw materials dried up, it needs to change another place, and then it reflects the advantages of mobile crushing production line. Therefore, it can save a lot of transportation costs. dryer machine:http://www.hxjq-crusher.com/21.html
Low-rank coal is also called as lignite. Because it has the features of high moisture, easy weathered spontaneous, low heat, low utilization ratio and difficult long-distance transport, so if large-scale develop and utilize it, we should process coal firstly. Currently, the proportion of low-rank coal has exceeded 45.67% in total coal reserves in our country. In order to find more ways, mobile crushing line designed by us according to absorb advanced coal processing technology, to open up a broader market.
Low-rank coal crushing is an important process in open coal mining. Mobile crushing line of Hongxing Heavy Industry is launched aiming at open coal unique operating environment specially, and can timely follow up the advance of the coal worksite, to reduce transport costs, greatly increasing the efficiency of coal mine production. Mobile coal crushing line is like a movable small and medium size crushing plant. The work efficiency and operation coat of mobile crushing production line is superior to the same level or higher level fixed crushing plant.
The new mobile crushing line can achieve integrated with jaw crusher, cone crusher, sand making machine and vibrating screen. It is used for coal coarse crushing, finish machining and other systematic processing, significantly improving productivity. Flexible mobile crushing function has saved a lot of transportation time for coal mine operation. Mobile crushing production line can become preferred professional equipment of open coal crushing and screening process.
Mineral milling is the process of grinding minerals into a fine powder. It is different from the process of granulation or crushing which is about the reduction of the size of a mineral to the size of a grain. Before milling a mineral, it is important to first determine its characteristics which include its hardness, brittleness, toughness, stickiness, melting or softening temperature, structure, abrasiveness, chemical stability, purity, homogeneity, free moisture content and structure.
The hardness of the mineral determines the specialization as well as cost of the type of mill that will be used. Brittleness is the ease with which a material will break. The free moisture content of a mineral should be low in order to ensure that the milling process takes place without any problems while the size and the degree of fineness of the mineral is required in order to know which mill to use.
There are various types of mills that can be used in the milling process including roller mills, hammer mills, pin mills, turbo mills, ball mills and vibrating mills. Each type of mill has different features and it is suitable for milling minerals with specific characteristics. For example, autogenous mills mill minerals that are fairly coarse into products that are relatively fine.
Mining of substances like minerals is usually done on a large scale and from many meters underneath the ground. The material mined are very heavy and brining them up in this status could require a lot of very heavy machines and in most cases they can’t with stand the weight so they spoil fast. Technology has made al this easier by providing milling options and it’s called mineral milling. As the professional manufacturer of complete sets of mining machinery, such as sand washer, Henan Hongxing is always doing the best in products and service. ball mill：http://www.hx-crushers.com/
Mineral milling is whereby grinding machines are used to grind the raw materials to finer forms for easy transport. Also even for easy means for transforming to an end product. This process is reversible to those particles that are not fine enough. Solid matter are ground using string mechanical forces that are used to trench internal forces that are holding the material together and break them. There are other grinding mineral millings that are used to produce manufacturing products.
Mineral milling is mainly done by large companies since it requires a lot of big machineries which are very expensive to purchase as an individual. These machines are usually transported in pieces and then they are reassembled at the plant where they will be used to grind. Each machine has a manual to help determine how each material can be grinded. This is because different rotation power is required to be used. Different mediums are also used to grind different raw materials. All these requires trained personnel to ensure the machines are working and are well maintained.
Ball mill’s the improved economic benefit: after improvement, material conveying uniform, and improves the production efficiency.
The copper ore is extracted, either through the open pit mines or underground mines. The beginning of the copper is mine by excavation blasting or crushing oxide and sulfide ore then. In the process of grinding, the copper ore is decomposed into sizes small grain of less than 25 cm in diameter by primary crusher and crushing that he pieces of nuts by Crusher or a crusher secondary finesse. Ball mill plays an important role in the process of Copper Ore Powder Making. Ball Mill is an effective tool to grind the nuts into powder size copper ore. There are two methods of grinding: the way dry and wet type. It can be divided into tabular type and type vibrant according to different forms of unloading.
As we all know, ball mill is a necessary and key equipment in the mineral processing of mining, and as with the ball mill, the revolving speed of a ball mill is the key factor of resolving its grinding efficiency .
However, in the actual work, the revolving speed of the ball mill is limited by the ratio of transmission device and other external conditions, which make it can’t reach the most suitable height, so it is generally easier to close to. As the professional manufacturer of complete sets of mining machinery, such as hammer crusher, Henan Hongxing is always doing the best in products and service. ore beneficiation:http://www.crusher-machine.com/n51.html
Advantages of vertical copper Ball Mill
Vertical ethical indent is a good preferred for grinding, as well as is at vast used in a concrete industry, electric power, metallurgy, containing alkali industry, as well as non-metallic vegetable industries. It can grub coal, marble, granite, kaolin, tough coke, etc. Therefore, it is additionally called straight spark indent or straight concrete mill.
The ball no longer block spiral groove, without the leakage phenomenon of feed, feeding capacity by improved before 12T / H to20T / H. Ball mill feed screw barrel after improvement, when output has reached13-15 ton, according to the production5T / H computing, year can obtain economic benefits 110000 yuan, and the renovation costs only 3000 yuan. When placed in use, belligerent materials have been a categorical tender element for a rabble in nation coverage. Then it rotates around a straight pivot line logging drum hung a stars stand. With centrifugal force by rotation, logging drum wings outward as well as presses discerning upon logging rings to assuage a ride of element functions in between a drum as well as harsh ring, which materials have been detected by rolling a drum logging as well as grinding. stone crusher
Coal mining in the past was not as environmentally friendly, or regulated.
There were a number of different coal mining methods used in the past.
Coal mining in the past was not as safe as the current mining methods used.
Coal mining in the past started in the middle of the seventeen hundreds, in the state of Pennsylvania. Over the years, many ways to remove this substance from the earth have been used, with methods being classified as underground or surface. The reason that it was first mined from the earth was not for electricity, but to be used in steel mills. It was not until the eighteenth century that coal was used to generate electricity to light homes and businesses. The first miners used a method called room and pillar, and eventually this method was combined with a method termed retreat. Coal mining in the past depended on workers and supporting the mine walls and ceilings. Rooms were carved out of the mine, and these were supported by massive pillars and beams. Miners would remove the coal from these underground rooms. When retreat mining was done along with room and pillar, the rooms were collapsed as the miners retreated from the mine. This collapse opened up even more coal seams, which could then be recovered. It was not until the middle of the nineteen sixties that this process changed much. This is when longwall mining started being used.
Coal mining in the past includes the longwall mining method as well. This method is much more effective, because a much larger percentage of the seam can be removed. This method uses a machine which carefully collapses a huge part of the room in a controlled manner, allowing a lot more of the seam to be accessed and removed. Surface mining can also be done if the seam is close to the surface. In this method the ground covering the coal seam is removed, then the coal is removed. The ground is put back down and seeded, to return the land back to the original condition. Unlike coal mining in the past, current mining operations do consider their environmental impact on the earth and surrounding areas, but this still does not negate the harmful effects that these operations can have. Coal is a fossil fuel which is not renewable, and it takes millions of years for this fuel to be created. Once it is gone it can not be replaced, and there are limited reserves left in the earth. Coal is mainly used to generate electricity in the United States, and when it is burned it releases large amounts of greenhouse gases and pollution. This causes damage to the environment and speeds up the global warming as well. As the professional manufacturer of complete sets of mining machinery, such as sand washer, Henan Hongxing is always doing the best in products and service. dryer machine:http://www.crusher-machine.com/24.html
Coal mining in the past did not factor in any environmental damage. Because of this many of the areas where this type of mining originated, like the state of Pennsylvania, are full of polluted and contaminated waters and lands. Chemicals and heavy metals caused streams and lakes to become toxic to fish and local wildlife, and even humans suffered from many effects caused by this pollution. Coal is no longer used to heat homes, but it is still used to generate large amounts of electricity in coal burning power plants. This causes high amounts of carbon and other greenhouse gases to be released into the air, and to damage the ozone layer. There is also substantial particle pollution released when coal is burned, and this pollution can cause asthma and other medical conditions in people who breath in these irritants. Safety is also another factor which has improved over time, and today miners and mining operations are done in a much safer manner. The processes have changed since the beginning of coal mining, but the damage done to the environment is still substantial and should be stopped.
The coal mining industry has come a long way in 200 years, since the coal mining industry really took off. During the Industrial Revolution, energy demand grew substantially, and coal was in needed in large amounts. At first, all mining was very dangerous work. It involved underground mines where men worked long hours removing coal by hand from deep within the earth. Mining accidents were frequent, and many men died getting trapped underground because of walls caving in or a buildup of gas in the mines. Coal was needed for heat, or to produce energy in the form of steam, which was then used to power various machines, trains, boats, etc.
Coal mining today is much different. There is still significant underground mining, but some of the mining performed in the United States today is surface mining, which does not involve digging deep mines into the earth. Surface mining involves removing coal from under the surface layer of earth. This can be done if the coal is no more than 200 feet beneath the surface. If the coal is buried any deeper, however, underground mining must be performed to recover the coal.
Many environmentalists are against surface mining because of the large scale damage this method can cause. The entire surface that covers the layer of coal is removed, and then the coal is recovered. Once all of the coal is removed, surface materials such as rocks, dirt, and sediment are returned to the area and spread out. The hope is that the area will recover and can be replanted with trees and other plant life. Methane recovery systems and research concerning the dangers of methane gas have greatly reduced the number of accidents that occur in underground mines, making both mining methods safer.
Some coal mines are looking forward to the future, with methane recovery systems that collect the present methane gases so no explosion can occur and health risks are limited. Methane recovery systems make sense because they make the mining process safer and provide for methane gas, another product, to be collected and then used. The methane gas recovered can be sold to utility companies and other buyers, and can be used in the coal mining process such as for drying coal or providing heat to buildings and energy to equipment through steam. Recovering methane gas from coal mining is the responsible thing to do, and the entire industry is starting to move towards making the coal mining process more environmentally friendly. 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. ball mill:http://www.crusher-machine.com/21.html
Coal will probably not be replaced as a fuel source any time soon, but the coal mining industry can make the entire process less harmful to the environment and more cost effective. Methane recovery systems help coal mining businesses recover more products, which can then be used as energy needed for the coal mining process. Methane gases are a dangerous factor of coal mining, and in the past the industry and the miners themselves suffered great losses because of this gas. Some coal mines began putting in vents to allow methane gas to escape from the mines so that it did not build up and pose a risk. Yellow canaries were taken into mines to determine if the level of gas in the mine was dangerous or not. If the bird died, the miners knew to get out immediately.
Modern mines should use methane gas recovery systems to capture this gas so that it can be used. The future of the mining industry depends on its ability to become as cost effective and eco-friendly as possible, and methane recovery systems are a step in the right direction.
There are many different types of data mining technology used in the process of retrieving information from raw data. Each of these types of technology is used for a variety of reasons including marketing, security and general information gathering. Data mining technology is commonly used to test samples of data rather than whole swaths of content, allowing analysts to verify and validate patterns within the blocks of information. Many companies specialize in developing these data mining tools for specific businesses or general use.
One common data mining technique is used by the insurance industry to determine standard rates of risk for its customers. The property and casualty industry suffers from a dwindling reserve of profits as the market fails to support the old business model traditionally used by insurance companies. In order to ensure profitable returns, the companies use a data mining tool to check each claim as it comes in as to whether it is a likely case of fraud. This saves the industry vast amounts of money each year.
Retailers and customer service businesses use a data mining technology that attempts to identify the attributes of its best customers. By associating certain advertisements and the structure of the retail environment with the best customer models, they can ensure these consumers get the best possible experience. In addition, the data mining technology is designed to get the number of these profitable customers to increase using these same techniques. Additional information can provide the companies with information about identifying the ultimate response of the customer base to changes and marketing approaches. This helps drive the overall strategy of the company, while also increasing profitability. As the professional manufacturer of complete sets of mining machinery, such as mobile crusher, Henan Hongxing is always doing the best in products and service. cone crusher:http://www.hx-china.com/5.html
The data mining technique that is known as attrition modeling, works for all types of industries to identify customers that are likely to move to other suppliers or retailers. This data mining technology optimizes information that allows for the best way to build loyalty with a customer base and avoid potential losses on a proactive scale. Using information culled from the existing customers currently doing business with a company, the technology provides data on those most likely to accept up-selling and cross-selling to build additional revenue. It will also target those customers that traditionally jump from supplier to supplier for various reasons, allowing the business the potential to either work with those clients or let them go. Regardless of the use for data mining technology, these techniques aid in financial growth and accountability.
Generally, data mining (sometimes called data or knowledge discovery) is the process of analyzing data from different perspectives and summarizing it into useful information - information that can be used to increase revenue, cuts costs, or both. Data mining software is one of a number of analytical tools for analyzing data. It allows users to analyze data from many different dimensions or angles, categorize it, and summarize the relationships identified. Technically, data mining is the process of finding correlations or patterns among dozens of fields in large relational databases.
What can data mining do?
Data mining is primarily used today by companies with a strong consumer focus - retail, financial, communication, and marketing organizations. It enables these companies to determine relationships among 'internal' factors such as price, product positioning, or staff skills, and 'external' factors such as economic indicators, competition, and customer demographics. And, it enables them to determine the impact on sales, customer satisfaction, and corporate profits. Finally, it enables them to 'drill down' into summary information to view detail transactional data.
With data mining, a retailer could use point-of-sale records of customer purchases to send targeted promotions based on an individual's purchase history. By mining demographic data from comment or warranty cards, the retailer could develop products and promotions to appeal to specific customer segments. As the professional manufacturer of complete sets of mining machinery, such as rotary dryer, Henan Hongxing is always doing the best in products and service. ball mills:http://www.hx-china.com/14.html
How does data mining work?
While large-scale information technology has been evolving separate transaction and analytical systems, data mining provides the link between the two. Data mining software analyzes relationships and patterns in stored transaction data based on open-ended user queries. Several types of analytical software are available: statistical, machine learning, and neural networks.
Different levels of analysis are available:
Artificial neural networks: Non-linear predictive models that learn through training and resemble biological neural networks in structure.
Genetic algorithms: Optimization techniques that use processes such as genetic combination, mutation, and natural selection in a design based on the concepts of natural evolution.
Nearest neighbor method: A technique that classifies each record in a dataset based on a combination of the classes of the k record(s) most similar to it in a historical dataset (where k 1). Sometimes it is called the k-nearest neighbor technique.
Rule induction: The extraction of useful if-then rules from data based on statistical significance.
Data visualization: The visual interpretation of complex relationships in multidimensional data. Graphics tools are used to illustrate data relationships.
A coal miner can perform a number of tasks around a coal mine, depending on the type of mine where he or she works. Despite significant safety improvements, coal mining continues to be an extremely dangerous occupation, and no matter what kind of work a coal miner does, it's necessary to be physically fit in addition to being attentive and cautious. Being aware of the surroundings in a mine can save lives, making alertness an important part of the job description for miners.
In surface mining operations, a coal miner can operate the heavy equipment which is used to strip away the topsoil from a seam of coal, drill holes in the coal for the placement of explosives, or work as a blaster, setting explosive charges to break up coal seams so that they can be removed. Other coal miners in surface operations work with the equipment which is used to remove the coal loosened by blasting operations. Coal miners usually train to do this work on the job, although some mining companies offer classroom training opportunities as well as practice opportunities in a non-working mine so that miners can get comfortable with the work.
When a company needs to mine underground to access coal, a coal miner can be part of the crew which lays out the mine and provides reinforcement and support to prevent collapses. He or she can also work on the teams which actually break up and remove the coal, using heavy equipment rather than the iconic shovels many people associate with coal mining. Coal miners can also work as safety inspectors, making sure that conditions in the mine are safe and addressing safety concerns as they arise. As the professional manufacturer of complete sets of mining machinery, such as cone crusher, Henan Hongxing is always doing the best in products and service. ore beneficiation：http://www.hx-crushers.com/p58.html
A skilled coal miner can work as a supervisor, overseeing work by other employees. Working as a supervisor can be less dangerous because supervisors are not necessarily in the thick of the work, but it also comes with major responsibilities, as supervisors must look out for the safety of the employees who work for them.
Coal mining is very dirty work, and it exposes people to a number of risks. Inhaled coal dust can cause lung problems, for example, and miners can be injured by heavy equipment, vehicle collisions, explosions, gas leaks, and collapses. Many coal miners are unionized so that they can enjoy more protections as workers and so that they can access assistance from the union if they are injured and need medical, legal, or financial help.