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A step-by-step flocculation process for treating scheelite beneficiation tailings slurry

A technology for scheelite and tailings, applied in separation methods, precipitation separation, chemical instruments and methods, etc., can solve the problems of high cost, complicated process, high energy consumption, etc., and achieve easy operation, simple treatment process, and low energy consumption Effect

Active Publication Date: 2018-12-25
CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of high energy consumption, high cost, and complicated procedures in the prior art, the present invention provides a step-by-step flocculation process for treating scheelite beneficiation tailings slurry

Method used

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  • A step-by-step flocculation process for treating scheelite beneficiation tailings slurry
  • A step-by-step flocculation process for treating scheelite beneficiation tailings slurry
  • A step-by-step flocculation process for treating scheelite beneficiation tailings slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A certain tungsten ore is mixed with the leftover pulp after the beneficiation and the rougher leftover pulp to obtain a mixed pulp. The mixed pulp has a pH value of 10-11 and a silicate content of more than 2000 mg / L, which is difficult to remove, especially the fine-grained slime , It is still in a turbid state after being placed for a long time. Take 1L of pulp, add sulfuric acid to adjust the pH value to 6-7, then add non-ionic polyacrylamide in 2 times, the addition system of non-ionic polyacrylamide is:

[0030] For the first time, add nonionic polyacrylamide in a ratio of adding nonionic polyacrylamide 10g per cubic meter;

[0031] Add nonionic polyacrylamide in the ratio of adding nonionic polyacrylamide 10g per cubic meter for the second time;

[0032] The molecular weight of the nonionic polyacrylamide is 6 million;

[0033] The time interval between two adjacent additions of nonionic polyacrylamide is 3 minutes.

[0034] After aging for 1 hour, a clear rec...

Embodiment 2

[0037] After a certain tungsten ore is concentrated, the remaining pulp is mixed with the roughing remaining pulp to obtain a mixed pulp. The pH value of the mixed pulp is 10-11, and the silicate content is greater than 2000mg / L, which is difficult to remove, especially the fine-grained slime , It is still in a turbid state after being placed for a long time. Take 1L of pulp, add sulfuric acid to adjust the pH value to 6-7, then add non-ionic polyacrylamide in 2 times, the addition system of non-ionic polyacrylamide is:

[0038] For the first time, add nonionic polyacrylamide at a rate of 15 g per cubic meter;

[0039] Add nonionic polyacrylamide in the ratio of adding nonionic polyacrylamide 15g per cubic meter for the second time;

[0040] The molecular weight of the nonionic polyacrylamide is 8 million;

[0041]After aging for 0.5 hour, a clear recovered liquid was obtained.

[0042] The time interval between two adjacent additions of nonionic polyacrylamide is 5 minutes...

Embodiment 3

[0044] A certain tungsten ore is mixed with the leftover pulp after the beneficiation and the rougher leftover pulp to obtain a mixed pulp. The mixed pulp has a pH value of 10-11 and a silicate content of more than 2000 mg / L, which is difficult to remove, especially the fine-grained slime , It is still in a turbid state after being placed for a long time. Take 1L of pulp, add sulfuric acid to adjust the pH value to 6-7, then add non-ionic polyacrylamide in 2 times, the addition system of non-ionic polyacrylamide is:

[0045] For the first time, add nonionic polyacrylamide at a ratio of 20 g per cubic meter of nonionic polyacrylamide;

[0046] Add nonionic polyacrylamide in the ratio of adding nonionic polyacrylamide 20g per cubic meter for the second time;

[0047] The molecular weight of the nonionic polyacrylamide is 12 million;

[0048] After aging for 0.5 hour, a clear recovered liquid was obtained.

[0049] The time interval between two adjacent additions of nonionic p...

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Abstract

The invention relates to a technology for treating scheelite mill tailings pulp by different steps through flocculation, and belongs to the field of treatment of industrial waste water. The technology comprises the following steps: after regulating pH value of scheelite mill tailings pulp (mixed pulp of cleaner tailings and rougher tailings) to be 5-10, adding nonionic polyacrylamide in the scheelite mill tailings pulp by two times at least; ageing to obtain clear recycled liquor; and returning the cycled liquor to be used for a scheelite flotation technology. Scheelite beneficiation waste water is used fully. The technology has the advantages that the waste water treatment technology is simple, efficient, stable in effect and low in cost, facilitates environmental protection and energy conservation and the like, and large-scale industrial application is facilitated.

Description

technical field [0001] The invention relates to a step-by-step flocculation process for treating scheelite beneficiation tailings slurry and belongs to the field of industrial wastewater treatment. Background technique [0002] Due to the addition of sodium silicate (water glass) in scheelite flotation, especially in the beneficiation process, a large amount of sodium silicate is added as a gangue inhibitor or dispersant. The presence of sodium silicate makes it difficult to clarify tailings water, especially a large number of fine suspended solids are difficult to settle under the action of gravity. The steps of the commonly used scheelite wastewater treatment process in industry are as follows: (1) put calcium carbide slag or lime milk into the tailings water to adjust the pH value above 12.0, then transport the tailings to the tailings pond, and the slag water in the tailings pond Separation and settlement; (2) When the tailings wastewater returns to the high-level pool,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D21/01
CPCB01D21/01
Inventor 孙伟殷志刚胡岳华陈臣翟计划皇甫泽超
Owner CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD