Mining is a process of useful minerals in the collected mineral raw materials, according to the differences in the physical properties of various minerals, physical chemical properties, and chemical properties.The mechanical implementation of this process is called mineral selection machinery, and the mineral selection machinery is divided into crushing, powder grinding, screening, sorting (selection) and dehydration machinery according to the mineral selection process.Let me introduce it in detail below!
Mining machinery development direction
Reasonable positioning
Mining equipment abroad is expensive, and it is difficult to adapt to the characteristics of great changes in my countrys mining areas. It is not suitable for Chinas national conditions and other issues. To this end, it should be combined with my countrys national conditions and the status of mineral resources in my country to develop mineral mechanical.
Power -saving
With the continuous rise in my countrys economy, the demand for energy, especially the demand for high -quality energy is also increasing; according to my countrys energy resource structure, in order to alleviate the contradiction between supply and demand of energy, reduce the pollution of the environment, and save energy saving work It looks more important.
Optimize design and improve the technological content of equipment
Advanced technology should be applied to the design of the mineral selection equipment, such as computer technology, electrical control technology, etc., through optimized design to make the equipment run stable, processing accurate processing, simple operation, reducing noise, reducing wear.
Strong adaptability
Such as slag, steel residue, clinker, quartz stone, fluorite and other super hard materials can be processed. In addition, the treatment of urban construction waste should be taken into account.
Sieving and classification equipment
One of the gap between the abrasive process and international advanced level of Chinese mines is that foreign countries generally use hydraulic flow and ball milling machines to be closed, while only hydraulic rotor grades are generally used in fine abrasive segments.
The main research direction of magnetic selection equipment is to improve the accuracy of sorting, expand the application field, increase processing capacity, and use new magnetic materials and save energy consumption.In the weak magnetic field magnetic selection equipment, the permanent magnetic selection machine is still the main.In recent years, the hotspot of the research and development of iron ore mining technology is to improve the quality of iron ore in the economy reasonably.Due to the constant magnetic field of the permanent tube magnetic selection machine, when the magnetic selection of the magnet ore is performed, the magnetic cluster of the mixed veins is low, so it is difficult to get high -quality concentrates.In order to destroy magnetic reunion and improve the quality of concentrates, in recent years, magnetic navigables, magnetic selection columns, and improved permanent magnetic selection machines have appeared.
The mechanical principle of mineral selection machinery
Taking the brown iron ore iron ore mining process as an example, including the following steps:
(1) Belly-iron ore powder with a grain size of less than 10mm and less than 15%of the moisture and less than 15%.
(2) The brown iron ore powder ore completes drying, magnetization, arsenic, and desulfurization in the same time in the same time.
(3) The temperature of the rotating kiln roasting area is 800.50 ° C, and the temperature of the drying area is 350.0 ° C.
(4) Secondly, the water for roasting mine after the first step is cooling;
(5) After the cooling, the classifier is graded, and the sand is divided by a magnetic slide wheel.
(6) Make coal distribution of low -iron high arsenic sulfur impurities brown iron ore mines, dry and baked, magnetize and remove arsenic, and sulfur impurities in the same kiln body. The process is simplified.Selected, after the magnetic selection, the magnetic mineral powder of high -speed rail products, low arsenic, and sulfur impurities is widely suitable for ore and waste mines containing weak magnetic iron minerals.

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