Ore Milling Equipment

Ore Milling Eequipment

Different purposes require different granularity, so the ore milling equipment has many types of crushing processes. The broken section is the most basic unit of the ore milling process. The number of broken pieces and the combination of crusher and sieve different, there will be different ore milling equipment crushing process. The broken section is made up of crushing operations by sieving operations and sieving products. Individual crushing segments may not include sieving operations or both sieving operations.

Detailed Introduction

The basic purpose of ore crushing is to make ore, raw materials or fuel to a certain size requirements. In the ore dressing, ore milling equipment is aimed at:

(1) the supply of Raymond Mill, high pressure hanging roller mill, powder mill, vertical mill (vertical mill) and so the most reasonable to the ore particle size, or for the grinding, gravel to provide qualified grinding Broken media

(2) the use of the corresponding crushing machinery, such as jaw crusher, impact crusher, cone crusher and other coarse particles embedded in the initial separation of minerals in order to coarse-grained selection method for mineral processing, such as heavy Media selection, jigging selection, dry magnetic separation and washing;

(3) to make high-grade iron ore to achieve a certain required particle size, in order to direct smelting and so on.

Pre-sieving is to pre-screen the qualified grain size before the ore enters the crushing section. It can reduce the amount of ore entering the crusher and increase the production capacity of the crusher. At the same time, it can prevent the ore from being smashed. In dealing with higher moisture content and more ore ore, the damp slag will clog the crushing chamber of the crusher and significantly reduce the crusher's production capacity. The use of pre-sieve to remove the wet and fine mineral powder, crusher can cause more normal working conditions. Therefore, the application of pre-sieving is mainly determined by the content of the fine grains in the ore (smaller than the grain size of the crusher). The higher the fine-grained content, the more favorable the use of pre-sieving. Pre-sieved to get two conclusions:

(1) pre-sieving is necessary in each broken section; inspection sieves are generally only used in the last crushing section.

(2) broken section is usually 2 to 3 paragraphs.

Common ore milling equipment is included in the mine process

(1) two ore milling equipment crushing process has two open and two sections of a closed two types. Two pieces of open ore milling equipment crushing process obtained crushing products coarse particle size, only in simple small concentrator or industrial test plant used, the first paragraph may not be pre-screening. In this case, when the ore in the mud and water is high, in order to make the normal production, small concentrator can also be used. Small-scale concentrator to deal with underground mining is not the size of the ore, and the second paragraph of the use of relatively large crusher crusher, you can use two closed-loop process.

(2) three sections of a closed-circuit ore milling equipment crushing process, as the preparation of grinding operations, access to a wider range of applications. Whether it is underground mining or open-pit mining of ore, as long as the ore is not high mud, can effectively adapt. Therefore, different size of the concentrator can be used. Three-stage open-track ore milling equipment Crushing process Compared with the three-stage closed-circuit process, the resulting crushed product has a coarse particle size, but it simplifies the equipment configuration of the crushing plant and saves infrastructure investment. Therefore, this process can be used when the grinding of the ore grain size is not strict and the rough grinding of the grinding section is carried out by rod grinding and the treatment of the higher moisture content of the muddy ore and the terrain. In dealing with ore containing higher muddy water, it does not cause the screen and the crushing chamber to be blocked as in the three-stage closed-circuit process. The use of three-stage open-rod grinding and grinding of the ore milling equipment crushing process, without the need for complex closed-circuit screening and return the product transport operations; and rods by the ore particle size changes less impact, uniform ore grain size, Mine operation is stable; at the same time, the production process produces less dust, which can improve labor hygiene conditions. This process can be used when the grinding product is required to be coarse (re-selected) or to treat brittle (tungsten, tin), large proportion (lead) minerals. Only to deal with very hard ore and large-scale concentrator, in order to reduce the crushing ratio of each paragraph or increase the total crushing ratio, consider the use of four broken process.

Ore milling equipment with washing operation

When the ore (3 mm) is more than 5-10% and the water content is greater than 5 to 8%, the fine grain will stick to the group and deteriorate the production conditions of the ore milling equipment, such as the crusher Of the crushing chamber and sieve mesh sieve plug, the occurrence of equipment accidents, storage and transportation equipment, blocking and leakage of the phenomenon, serious production can not be carried out. At this point, ore milling equipment should be in the mine to increase the washing facilities. Increase the washing facilities, not only can give full play to the potential of equipment, so that the normal production. Improve labor intensity, but also improve the recovery of useful metals, expand the use of resources. Washing operations are generally located in the rough before and after, depending on the ore grain size, water content and the structure of the washing equipment and other factors. Commonly used washing equipment are washed ore sieve (grid sieve, shaker, cylinder sieve), trough washing machine, cylinder washing machine. After cleaning the net mine, and some need to be broken, and some can be used as qualified grain level. Wash out the mud, if the grade close to the tailings grade, you can discard; if the grade close to the ore grade, you need to select the selected. In order to make the crushing machine safe and normal production, the first washing in the grid sieve on the sieve products on the coarse crushing, sieve products into the shaker and then wash. After the second washing of the sieve products into the broken, the product under the screen into the spiral grading machine classification, deslimatization, grading back to the sand and the final broken product merger, the classification overflow through the dense machine buffer, dehydration, the individual fine Mud grinding.


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