Combined separation process of pressurized two-product and pressurized three-product cyclone

Abstract

The invention discloses a combined separation process of a pressurized two-product and pressurized three-product dense medium cyclone. The combined separation process comprises the following steps: firstly, desliming washed raw coal in advance to obtain oversize raw coal and undersize slime water; feeding the undersize slime water into a slime water treatment system; feeding the oversize raw coalinto a primary separation system of a first-section pressurized two-product cyclone; separating to obtain a low-ash clean coal and medium gangue mixture; and feeding the medium gangue mixture into a secondary pressurized three-product dense medium cyclone after medium removal, and separating to obtain high-ash clean coal, medium coal and gangue. According to the combined separation process, the dense medium coal is separated into high-ash clean coal and medium coal products again by utilizing the advantages of high separation precision and flexible product structure adjustment of the pressurized three-product cyclone, so that a high-level and high-benefit production system and process taking the pressurized two-product and pressurized three-product dense medium cyclone as main washing equipment are formed, and the investment cost of medium coal re-washing equipment is saved. The combined separation process is particularly suitable for the situation that the medium coal contains part ofhigh-ash clean coal and the clean coal resource is wasted under the condition that the clean coal production index of a coal preparation plant is relatively low.

Description

technical field [0001] The invention relates to the technical field of coal washing, in particular to a combined separation process of a pressurized two-product plus a pressurized three-product cyclone. Background technique [0002] Coking coal resources, as the main energy resource in our country, play an important role in the economic development of our country, but due to the current irrational mining and use of coal resources, a large amount of coal resources are wasted. As a non-renewable resource, coking coal is one of the factors restricting the sustainable and stable development of my country's economy and society. Whether its mining and utilization is appropriate has a very important impact on my country's energy utilization and economic development. [0003] Most coking coal coal preparation plants in my country use medium coal directly as fuel steam coal, which is obviously a waste of scarce coking coal resources in our country. If the medium coal is sorted again...

AI Technical Summary

Problems solved by technology

At present, the medium coal re-selection process mainly adopts the following methods: medium coal crushing + jigging or cyclone process, medium coal crushing + TBS / coal slime heavy medium separation + flotation process, medium coal grinding + flotation Technology, etc. These conventional medium coal re-selection methods have a high recovery rate of clean coal, but additional separation equipment needs to be purchased, the process is relatively complicated, and the operating cost is high

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