Method for treating collophanite positive and reverse flotation beneficiation wastewater

A technology of positive and negative flotation and beneficiation wastewater, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Removing, not considering industrial recycling and other issues, to achieve the effect of cost saving, cost reduction, and damage avoidance

Active Publication Date: 2011-04-20
CHINA NAT OFFSHORE OIL CORP +2
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  • Claims
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Problems solved by technology

These wastewater treatment processes only consider the removal of harmful ions, and do not consider industrial recycling; in addition

Method used

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  • Method for treating collophanite positive and reverse flotation beneficiation wastewater
  • Method for treating collophanite positive and reverse flotation beneficiation wastewater
  • Method for treating collophanite positive and reverse flotation beneficiation wastewater

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Embodiment 1

[0018] Embodiment 1, treatment of high hardness wastewater produced by collophosite forward and reverse flotation

[0019] according to figure 1 The process flow diagram shown treats the wastewater.

[0020] The water quality indicators of the high hardness wastewater produced by collophosite forward and reverse flotation before treatment are as follows: Ca 2+ 86.33mg / L, Mg 2+ 78.24mg / L, PO 4 3- 98.51mg / L, SO 4 2- 826.7mg / L, pH value 7.8, total hardness 609.3mg / L.

[0021] (1) According to the molar ratio of the magnesium content in the clean lime and the waste water=1.2:1; the calcium content in the soda ash and the waste water (comprising the calcium ions brought by the clean lime, 1.05 times of the soda ash can remove the calcium ions in the raw water, plus 0.2 times the amount of soda ash to remove the calcium ions brought in by the refined lime) ratio = 1.25: 1 ratio to prepare a certain concentration of refined lime emulsion and soda ash solution in 1# and 2# dosi...

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Abstract

The invention aims to provide a method for treating collophanite positive and reverse flotation beneficiation wastewater. In the method, a dual-base method is adopted to make various ions being not beneficial to a beneficiation flotation process in the wastewater precipitate to be removed. The method comprises the following concrete steps of: (1) firstly, adding refined lime to the collophanite positive and reverse flotation beneficiation wastewater for reacting to obtain a reaction system containing sediments, and marking as the reaction system 1; (2) adding soda ash to the reaction system 1 for reacting to obtain a reaction system 2 containing the sediments; and (3) making the reaction system 2 precipitate and removing the sediments to obtaine the treated collophanite positive and reverse flotation beneficiation wastewater. The wastewater treated by the process completely meets the beneficiation water index requirement, and the recovery rate of the water is not less than 99 percent. The process reduces the beneficiation water cost and meanwhile also avoids environmental pollution caused by the reason that the wastewater is directly discharged.

Description

technical field [0001] The invention belongs to the field of waste water treatment and utilization, and in particular relates to a method for treating waste water from collophosite forward and reverse flotation. Background technique [0002] During the production process of colloidal positive and negative flotation, a large amount of high-hardness wastewater will be produced, mainly containing Ca 2+ , Mg 2+ 、PO 4 3- , SO 4 2- , organic ions, etc.; where PO 4 3- , SO 4 2- Ions will have a strong inhibitory effect on phosphorus minerals, resulting in the increase of positive flotation tailings and affecting the beneficiation index; Ca 2+ , Mg 2+ Ions will consume a certain amount of collector and Na 2 CO 3 , so that the cost of beneficiation agent rises. If all these high-hardness wastewaters are discharged, on the one hand, the water utilization rate will not be high, which will increase the cost of mineral processing, and on the other hand, the impurity ions in ...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 姜振胜张革利安平胡高峰原航辉
Owner CHINA NAT OFFSHORE OIL CORP
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