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A process for segmental utilization of waste water from direct and reverse flotation of phosphate rock

A technology of positive and negative flotation and production wastewater, which is applied in flotation water/sewage treatment, flotation, solid separation, etc., can solve the problems that production wastewater cannot be cross-mixed, and achieve significant economic and social benefits and a safety factor High and low investment costs

Active Publication Date: 2020-03-24
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process can effectively solve the problem that waste water from forward and reverse flotation production cannot be used in a cross-mixed manner, and realizes the recycling of waste water nearby and the dry discharge of tailings

Method used

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  • A process for segmental utilization of waste water from direct and reverse flotation of phosphate rock

Examples

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Effect test

Embodiment 1

[0016] Embodiment 1, with reference to figure 1 , a segmental utilization process of phosphate rock positive and negative flotation production wastewater, the process mainly includes: after the raw ore is ground by a mill, the slurry that reaches the qualified particle size enters the flotation machine for positive flotation operation, and the product in the flotation machine tank After being filtered by the first filter, the filtrate enters the positive flotation backwater pool, the filter cake, that is, the positive flotation tailings enters the tailings stockyard, the foam product of the flotation machine enters the first thickener, and the overflow enters the positive flotation backwater pool. After the underflow enters the second filter for filtration, the filtrate enters the positive flotation return tank, and the filter cake enters the reverse flotation operation; after the reverse flotation flotation machine foam product enters the third filter for filtration, the filtr...

Embodiment 2

[0018] Embodiment 2, with reference to figure 1 , a segmental utilization process of phosphate rock positive and negative flotation production wastewater; a certain phosphate rock (P 2 o 5 20.98%) after being ground by a mill, the pulp with a fineness of -200 mesh accounting for 78% will enter the inflatable mechanical agitation flotation machine for positive flotation, control the pH value of the pulp at 9-10, add inhibitors and collectors , the product in the flotation machine tank enters the vertical automatic filter press (the first filter), the filtered filtrate enters the positive flotation return pool, and the filter cake enters the tailings stockpile. The water content of the filter cake is below 12%. The foam product enters the first thickener, the overflow enters the positive flotation return tank, the underflow enters the ceramic filter (the second filter), the filtered filtrate enters the positive flotation return tank, and the filter cake enters the slurry tank; ...

Embodiment 3

[0019] Embodiment 3: Refer to figure 1 The utility model relates to a segmental utilization process of waste water produced by positive and negative flotation of phosphate rock. A phosphate rock (P 2 o 5 15.23%) after being ground by a mill, the pulp with a fineness of -200 mesh accounting for 90% will enter the inflatable mechanical agitation flotation machine for positive flotation, control the pH value of the pulp at 9-10, add inhibitors and collectors , the product in the flotation machine tank enters the box-type automatic filter press (the first filter), the filtered filtrate enters the positive flotation backwater tank, and the filter cake enters the tailings stockpile. The water content of the filter cake is below 15%. The foam product enters the first thickener, the overflow enters the positive flotation return tank, the underflow enters the ceramic filter (the second filter), the filtered filtrate enters the positive flotation return tank, and the filter cake enter...

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Abstract

A phosphorite direct-reverse flotation production wastewater subsection utilization technology is disclosed. the technology mainly comprises the following steps: raw ore is ground by a grinding machine, ore pulp enters a flotation machine to undergo direct flotation, a product inside a trough of the flotation machine enters a first filter, a filtrate obtained after the filtration enters a direct-flotation water recycling tank, a foam product of the flotation machine enters a first thickener, an overflow enters the direct-flotation water recycling tank, a underflow enters a second filter, a filtrate obtained after the filtration enters the direct-flotation water recycling tank, and a filter cake undergoes reverse flotation; and a foam product of a reverse flotation machine enters a third filter, a filtrate obtained after the filtration enters a reverse-flotation water recycling tank, a filter cake (namely reverse flotation tailings) enters a tailings storage yard, a product in a trough of the flotation machine enters a second thickener, an overflow enters the reverse-flotation water recycling tank, a underflow enters a fourth filter, a filtrate obtained after the filtration enters the reverse-flotation water recycling tank, and a filter cake is the final phosphate concentrate product. According to the invention, the problem that direct-reverse flotation production wastewater cannot be cross-mixed for use can be effectively solved, and dry discharge of mine tailings is realized.

Description

technical field [0001] The invention relates to a segmental utilization process of phosphate rock positive and negative flotation production wastewater, which belongs to the phosphate rock beneficiation technology. Background technique [0002] Among the proven reserves of phosphate rock in my country, more than 75% belong to medium and low-grade siliceous-calcium colloidal phosphate rock, which is a refractory ore. At present, the technically feasible method for ores of this nature is positive and negative flotation. [0003] Positive flotation refers to the separation of phosphorus-containing minerals from silicate gangue minerals by adding flotation agents in alkaline pulp. The foam product is concentrate, and the product in the tank is tailings. [0004] Reverse flotation refers to the separation of phosphorus-containing minerals from carbonate gangue minerals by adding flotation reagents to the concentrate obtained from positive flotation in acidic pulp. The foam pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04B03D1/00
CPCB03D1/00C02F1/001C02F1/24C02F1/52C02F9/00C02F2301/043C02F2301/08
Inventor 马军二肖友华林杰赵忠花
Owner BLUESTAR LEHIGH ENG INST CO LTD
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