Method for flocculating settling of scheelite beneficiation wastewater

A technology for mineral processing wastewater and scheelite, applied in mining wastewater treatment, flocculation/sedimentation water/sewage treatment, chemical instruments and methods, etc., can solve problems such as separation, inability to solidify, and low concentration, and achieve enhanced separation effects and solutions Purification problem, the effect of fast settling speed

Active Publication Date: 2016-06-01
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) The composition of mineral processing wastewater is complex, with many toxic and harmful components, but the concentration is low
However, there is a disadvantage in this process, that is, the aggregates formed in the early stage of settlement contain a certain amount of water, which cannot be separated from the solid, which affects the separation effect of mud and water.

Method used

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  • Method for flocculating settling of scheelite beneficiation wastewater
  • Method for flocculating settling of scheelite beneficiation wastewater
  • Method for flocculating settling of scheelite beneficiation wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add milk of lime with a mass concentration of 10% to the scheelite mineral processing wastewater (composition shown in Table 1), adjust the pH of the mineral processing wastewater to 10, stir for 3 minutes and then let it stand for 10 minutes for destabilization; add 100 mg The chitosan (1wt% concentration) of / L stirs 3min, and the pH of stable waste water is at 9.5 and settles 30min; Add hydrochloric acid in the waste water after settling and pH is adjusted to 3.5, continue settling 10min, the supernatant liquid sampling test result that obtains As shown in Table 1;

[0014] Table 1 Mineral processing wastewater and wastewater testing results after treatment

[0015]

Embodiment 2

[0017] Add lime milk with a mass concentration of 5% to the scheelite mineral processing wastewater (composition shown in Table 2), adjust the pH of the mineral processing wastewater to 9, stir for 3 minutes and then let it stand for 10 minutes to destabilize; add 80 mg of milk to the destabilizing wastewater The chitosan (1wt% concentration) of / L stirs 3min, and the pH of stable waste water is at 9 and settles 30min; Add hydrochloric acid in the waste water after settling and pH is adjusted to 3.2, continue settling 15min, the supernatant liquid sampling test result that obtains As shown in table 2.

[0018] Table 2 Mineral processing wastewater and wastewater testing results after treatment

[0019]

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Abstract

The invention discloses a method for flocculating settling of scheelite beneficiation wastewater. The method comprises the steps that a destabilizing agent lime milk is added into the scheelite beneficiation wastewater to obtain destabilized wastewater, then a pH regulator is added to keep the pH of the wastewater at 9-10, a proper quantity of polymeric flocculant chitosan is added, primary sedimentation is performed under the pH of 9-10, then the pH regulator is added to reduce the pH to 4-5, sedimentation continues to be carried out, and then purified water is obtained. According to the method, lime milk is first utilized for destabilizing suspended matter in the beneficiation wastewater, and then the polymeric agent chitosan is utilized for a stress reaction to pH change. Flocculation and dispersion of the polymeric agent are caused by changing the pH, so that the separation effect of coarse particle flocculating constituents and water is enhanced, the flocculation efficiency is high, the settling velocity is high, the beneficiation wastewater can be well purified, and standard discharge of the wastewater is realized.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment and relates to a method for flocculation and sedimentation of scheelite mineral processing wastewater. The method utilizes a flocculant with a stress response to flocculate and settle the mineral processing wastewater, and the treated wastewater can meet discharge or reuse standards. Background technique [0002] The wastewater produced by the mineral processing plant is referred to as the mineral processing wastewater. The mineral processing wastewater in my country has the following three characteristics: (1) The discharge of the mineral processing wastewater is large. (2) The composition of mineral processing wastewater is complex, with many toxic and harmful components, but the concentration is low. (3) The beneficiation wastewater of the flotation plant contains many kinds of chemicals with high concentration. When the mineral processing plant adopts the flotation process, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/10
CPCC02F1/56C02F1/66C02F9/00C02F2103/10
Inventor 冯博罗仙平朱贤文彭金秀陈志勇
Owner JIANGXI UNIV OF SCI & TECH
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