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A kind of treatment method of phosphate rock positive and negative flotation wastewater

A forward and reverse flotation and treatment method technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of increased treatment cost, high NaOH cost, and more sodium carbonate consumption, so as to achieve low treatment cost and improve positive floatation. Selection and sorting, the effect of less lime consumption

Active Publication Date: 2015-12-09
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment method of positive and negative flotation wastewater of phosphate rock is mainly to return the wastewater to the positive flotation system, and add NaOH treatment before adding the positive flotation collector. If it is lower, more calcium ions and magnesium ions will remain in the wastewater. Positive flotation needs to consume more sodium carbonate to eliminate the influence of calcium ions and magnesium ions in water, and the cost of NaOH is higher, which increases the treatment cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, a treatment method of positive and negative flotation wastewater of phosphate rock, in the positive and negative flotation process of phosphate rock, the reverse flotation adjustment agent adopts wet-process phosphoric acid or hot-process phosphoric acid or any combination of wet-process phosphoric acid and hot-process phosphoric acid The excess wastewater in the process is treated with lime in one step, and then it can be returned to the positive flotation system for recycling. The specific treatment steps are:

[0016] (1) Collect the wastewater from the positive and negative flotation system;

[0017] (2) Transport the collected wastewater to the mixing tank, and add lime to the mixing tank at the same time to stir and react to form a precipitate. The stirring time is 0.5min, and the amount of lime is: make the PO in the reaction system 4 3- with (Ca 2+ +Mg 2+ ) molar ratio is 1:1.1;

[0018] (3) Transport the water containing sediment to the sedime...

Embodiment 2

[0019] Embodiment 2, a treatment method of positive and negative flotation wastewater of phosphate rock, in the positive and negative flotation process of phosphate rock, the reverse flotation adjustment agent adopts wet-process phosphoric acid or hot-process phosphoric acid or any combination of wet-process phosphoric acid and hot-process phosphoric acid The excess wastewater in the process is treated with lime in one step, and then it can be returned to the positive flotation system for recycling. The specific treatment steps are:

[0020] (1) Collect the wastewater from the positive and negative flotation system;

[0021] (2) Transport the collected wastewater to the mixing tank, and add lime to the mixing tank at the same time to stir and react to form a precipitate. The stirring time is 6 minutes, and the amount of lime is: to make the PO in the reaction system 4 3- with (Ca 2+ +Mg 2+ ) molar ratio is 1:1.9;

[0022] (3) Transport the water containing sediment to the ...

Embodiment 3

[0023] Embodiment 3, a treatment method of positive and negative flotation wastewater of phosphate rock, in the positive and negative flotation process of phosphate rock, the reverse flotation adjustment agent adopts wet-process phosphoric acid or hot-process phosphoric acid or any combination of wet-process phosphoric acid and hot-process phosphoric acid The excess wastewater in the process is treated with lime in one step, and then it can be returned to the positive flotation system for recycling. The specific treatment steps are:

[0024] (1) Collect the wastewater from the positive and negative flotation system;

[0025] (2) Transport the collected wastewater to the mixing tank, and add lime to the mixing tank at the same time to stir and react to form a precipitate. The stirring time is 0.5min, and the amount of lime is: make the PO in the reaction system 4 3- with (Ca 2+ +Mg 2+ ) molar ratio is 1:1.4;

[0026] (3) Transport the water containing sediment to the sedime...

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Abstract

The invention provides a treatment method of wastewater generated during phosphorus ore direct and reverse flotation. In the phosphorus ore direct and reverse flotation process, phosphoric acid is adopted as a reverse flotation regulator, and the redundant wastewater can be returned to a direct flotation system to be recycled after undergoing one-step treatment by adopting lime. The treatment method specifically comprises the steps of collecting the wastewater from a direct and reverse flotation system; delivering the collected wastewater to an agitation vat, and simultaneously adding lime to the agitation vat to be agitated to react, thus generating a precipitate; delivering the water containing the precipitate to a precipitation tank to be precipitated, and returning the upper clear water to the direct flotation system to be recycled. The wastewater treatment method has the beneficial effects that lime is adopted for one-step treatment; the process flow is simple; the cost is low; the treated wastewater returns to direct flotation, so that the dosages of sodium carbonate and sodium silicate in the direct flotation system can be reduced, the sorting property of direct flotation can be improved and the phosphorus concentrate recovery rate can be increased.

Description

technical field [0001] The invention belongs to the technical field of phosphate rock beneficiation, and in particular relates to a recycling treatment method for phosphate rock forward and reverse flotation wastewater. Background technique [0002] In the forward and reverse flotation process of phosphate rock, the wastewater from the tailings of the forward flotation can be directly returned to the forward flotation system for use, and the concentrate wastewater and tailings wastewater of the reverse flotation system can be returned to the reverse flotation system for use. The water consumption of the forward flotation system is relatively large, and the amount of wastewater returned from the tailings of the forward flotation is insufficient, and a part of water needs to be added, while the water consumption of the reverse flotation system is small, but the wastewater that needs to be returned by the reverse flotation system is more, and some of it is redundant , if this p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 冯春晖钱押林杨勇刘云涛刘国举刘星强朱孔金李丰刘养春
Owner BLUESTAR LEHIGH ENG INST CO LTD