Coking middling coal dms-flotation combined separation process

A sorting and flotation technology, which is applied in the direction of solid separation, wet separation, chemical instruments and methods, etc., can solve the problems of energy consumption, entrainment, and high-fine mud in tailing coal running and coarse crushing, so as to save crushing energy consumption, High sorting efficiency and low power consumption

Active Publication Date: 2015-06-24
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a sorting process for effectively sorting coking medium coal, in which the low-ash coarse particles are recovered from the flotation medium coal (coarse tailing coal) through gravity separation, and the gravity medium coal is selectively crushed according to the The particle size is recovered in different ways, and at the same time, according to the particle size difference between the crushed medium coal slime and the ground medium coal slime, the coarse recovery rate and fine particle selectivity of fine particles in the second stage flotation are strengthened in the slurry mixing process to solve the problem of flotation tailings. The problem of excessive crushing of coarse and medium coal, high energy consumption and serious fine mud entrainment, provides a coking medium coal separation method with low operating cost, high separation efficiency and remarkable economic efficiency

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  • Coking middling coal dms-flotation combined separation process
  • Coking middling coal dms-flotation combined separation process

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[0038] Example: such as figure 1 Shown, a kind of coking middling coal refloating combined separation process of the present invention. After slurry adjustment, the floating coal slime flows into the first-stage flotation machine for separation to obtain flotation clean coal and tailing coal. The tailing coal of the first stage of flotation is concentrated and dehydrated through the grading cyclone and the desliming screen. The overflow of the grading cyclone and the desliming sieve are used as the flotation tailings together with the subsequent flotation tailings, which are deslimed and dehydrated through the desliming screen. The final coarse coal tailings are fed into the first-stage coarse coal slime separator for gravity separation to obtain coarse fine coal slime and a first-stage heavy product. The crushed coal (including lump medium coal and fine medium coal) is crushed by the impact crusher, and the crushed products are sent to the grading sieve to obtain +2mm coarse...

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Abstract

The invention discloses a coking middling coal dms-flotation combined separation process, and belongs to the technical field of coking middling coal separation. The process comprises the steps of 1, primary size mixing flotation operation, 2, hierarchical dewatering operation, 3, crushing and screening operation, 4, coarse slime separation operation, 5, desliming operation, 6, ore grinding dissociation operation, 7, secondary size mixing operation and 8, secondary flotation operation. The coking middling coal dms-flotation combined separation process is simple in procedure, small in investment, low in energy consumption, little in operation cost, high in separation efficiency and remarkable in economic benefit.

Description

technical field [0001] The invention relates to the technical field of coking middling coal separation, in particular to a heavy-floating combined separation process suitable for coking middling coal with a relatively large content of intermediate intergrowth. Background technique [0002] With the rapid development of my country's economy, the demand for coking coal is increasing day by day. Although my country is rich in coal resources, strategic coking resources only account for 27.6% of the reserves, and about 46.9% of them are gas coal, and main coking coal and fat coal only account for 5.39% and 3.38% of the total reserves. The yield of main coking coal and fat coal cleaned in my country every year is 40%, and the average yield of medium coal is above 30%. This part of medium coal can only be used as steam coal due to its high ash content, which has caused a great waste of scarce resources and Huge loss of economic benefits. Coking medium coal is an intermediate produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
CPCB03B7/00
Inventor 桂夏辉刘炯天张义曹亦俊夏灵勇佟顺增
Owner CHINA UNIV OF MINING & TECH
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