Novel technology for flocculation, pressure filtration and dehydration of flotation clean coal
A technology of filter press dehydration and new process, which is applied in filtration separation, selective deposition method, solid separation and other directions, can solve the problems of slow filter press speed, equipment loss, increase filter press load, and increase filter pressure pressure, etc. Filtering efficiency, reduced fine particle loss, reduced loss effect
Pending Publication Date: 2019-03-29
YUWU COAL CO LTD OF SHANXI LUAN GRP +1
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Problems solved by technology
[0004] For the problem of clean coal loss caused by filter cloth in the process of flotation fine-grained clean coal pressure filtration and dehydration, if a filter cloth with a small pore size is used, the pressure of the filter press will be increased, and the load of the filter press will be increased, and the filter press speed is slow and the equipment The loss is serious, and it is difficult to meet the processing capacity requirements
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example 1
[0024] Example 1: This process carried out a filter press dehydration test on the flotation clean coal of Yuwu Coal Preparation Plant. If this process was not used to process the filter press feed, the concentration of the filtrate obtained after the press filter was 20.7g / L, and the moisture content of the filter cake was 18. %-20%; after using this process to process the filter press feed, the filtrate concentration is 13.4g / L after press filter dehydration, and the filter cake moisture is 16.6%. The relevant test results are shown in Table 1.
[0025] Table 1 Comparison test results of flotation clean coal pressure filtration dehydration in Yuwu Coal Preparation Plant
[0026]
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The invention discloses a novel technology for flocculation, pressure filtration and dehydration of flotation clean coal. The novel technology comprises the following steps that (1) the flotation clean coal obtained after flotation is stirred and dispersed in a stirring barrel before entering the pressure filtration operation; (2) a proper amount of a flocculant is added into dispersed and treatedore pulp, the stirring strength is adjusted to be 450 r / min to promote particles in the ore pulp to generate an aggregation effect; (3) a proper amount of a flocculant is added into the ore pulp obtained in step (2), and the ore pulp is promoted to generate a flocculation effect under the same stirring strength; and (4) pressure filtration and dehydration treatment is carried out on the ore pulpsubjected to flocculation treatment so as to obtain a filtrate and a clean coal filter cake.
Description
technical field [0001] The invention relates to a fine particle flocculation filter press dehydration process, in particular to a new process suitable for flotation clean coal flocculation filter press dehydration. Background technique [0002] The dehydration of flotation clean coal is the last link in the production process of flotation clean coal. Most coal preparation plants adopt the direct pressure filter process of flotation clean coal. This process is better for coal that is easy to be selected or coal with less fine particles in the flotation feed. If the coal with more fine particles in the flotation feed is directly press-filtered, the fine particles in the feed will be A large amount is lost in the filtrate, which increases the difficulty of coal slime water treatment and increases the ash content of coal slime, and also causes the loss of clean coal. It has a great impact on the production and benefits of the coal preparation plant. [0003] With the large-sca...
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IPC IPC(8): B03D3/02B03D3/06B01D25/12
CPCB01D25/12B03D3/02B03D3/06
Inventor 史红邈徐宏祥黄勇张嘉云王亚健赵翔申杰杜军王鹏辉黄根花晓中刘向华李鹏飞
Owner YUWU COAL CO LTD OF SHANXI LUAN GRP