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A method for harmlessly treating barium slag by using phosphogypsum

A technology of harmless treatment and phosphogypsum, applied in the direction of solid waste removal, etc., can solve the problems of manganese slag not being common enough, high cost, poor neutralization effect, etc., and achieve the effects of low cost, reduced concentration and simple operation.

Active Publication Date: 2019-07-26
王明启
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the industry mainly uses sodium sulfate or ferrous sulfate to treat barium slag, and the disadvantage is that the cost is relatively high.
Chinese patent (application number 201611046282.4) proposes to use manganese slag to treat barium slag, but manganese slag is not common enough, and the neutralization effect of manganese slag on barium slag is poor, the pH of barium slag is generally above 12, and the pH of manganese slag is 6 -7, the pH of barium slag is still high after treatment

Method used

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  • A method for harmlessly treating barium slag by using phosphogypsum

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Experimental program
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Effect test

Embodiment 1

[0022] A method for harmlessly treating barium slag with phosphogypsum, comprising the following steps: S1) crushing barium slag: putting the barium slag into a grinder to obtain barium slag with a mesh number of 50.

[0023] S2) Water injection into the barium slag: inject water into the ground barium slag in S1), so that the water content of the ground barium slag is 15.0%.

[0024] S3) Grinding of phosphogypsum: Putting phosphogypsum into a grinder to obtain phosphogypsum with a mesh number of 50.

[0025] S4) Phosphogypsum water injection: inject water into the ground phosphogypsum in S3), so that the water content of the ground phosphogypsum is 4.2%.

[0026] S5) Mixing and stirring of the reactants: Put the barium slag after water injection and the phosphogypsum after water injection into the mixer according to the mass ratio of 10.0:1.0, and the mixer works for 20 minutes.

[0027] S6) Ultrasonic vibration: After the mixer stops working, put the ultrasonic vibrating ro...

Embodiment 2

[0033] A method for harmlessly treating barium slag with phosphogypsum, comprising the following steps: S1) crushing barium slag: putting the barium slag into a grinder to obtain barium slag with a mesh number of 50.

[0034] S2) Water injection into the barium slag: inject water into the ground barium slag in S1), so that the water content of the ground barium slag is 15.9%.

[0035] S3) Grinding of phosphogypsum: Putting phosphogypsum into a grinder to obtain phosphogypsum with a mesh number of 50.

[0036] S4) Phosphogypsum water injection: inject water into the ground phosphogypsum in S3), so that the water content of the ground phosphogypsum is 3.8%.

[0037] S5) Mixing and stirring of the reactants: Put the barium slag after water injection and the phosphogypsum after water injection into the mixer according to the mass ratio of 10.0:5.0, and the mixer works for 20 minutes.

[0038] S6) Ultrasonic vibration: After the mixer stops working, put the ultrasonic vibrating ro...

Embodiment 3

[0044] A method for harmlessly treating barium slag with phosphogypsum, comprising the following steps: S1) crushing barium slag: putting the barium slag into a grinder to obtain barium slag with a mesh number of 50.

[0045] S2) Water injection into the barium slag: inject water into the ground barium slag in S1), so that the water content of the ground barium slag is 16.0%.

[0046] S3) Grinding of phosphogypsum: Putting phosphogypsum into a grinder to obtain phosphogypsum with a mesh number of 50.

[0047] S4) Phosphogypsum water injection: inject water into the ground phosphogypsum in S3), so that the water content of the ground phosphogypsum is 3.5%.

[0048] S5) Mixing and stirring of the reactants: Put the barium slag after water injection and the phosphogypsum after water injection into the mixer according to the mass ratio of 10.0:15.0, and the mixer works for 20 minutes.

[0049] S6) Ultrasonic vibration: After the mixer stops working, put the ultrasonic vibrating r...

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Abstract

The invention provides a method for harmless treatment of barium slag through ardealite. The method includes the following steps that firstly, the barium slag is smashed, wherein the barium slag is thrown into a grinding machine, and the barium slag of 50 meshes is obtained; and secondly, water is injected into the barium slag, wherein water is injected into the ground barium slag so that the water content of the ground barium slag can range from 15.0% to 17.0 %. The ardealite is adopted for harmless treatment of the barium slag, so that cost is low, operation is simple, the source of the ardealite is wide, and a foundation is provided for stacking treatment of the barium slag; fixation of barium salt in the barium slag is achieved, meanwhile, the dissolution dissolubility of soluble phosphorus in the ardealite is also reduced, and the effect of treating waste with waste is achieved; and soluble barium in the barium slag exists mainly in the manner of sulfide or hydrosulfide, soluble sulfur and phosphorus (sulfate radicals and phosphate radicals) in the ardealite are utilized, the soluble barium is settled and solidified, the leaching toxicity of barium is harmless, the corrosivity(pH) is reduced as well, and the concentration of the soluble phosphorus is reduced.

Description

technical field [0001] The invention relates to the technical field of a method for harmlessly treating barium slag by using phosphogypsum, in particular to a method for harmlessly treating barium slag by using phosphogypsum. Background technique [0002] my country produces 75% of the barium carbonate in the world. Therefore, my country is also a big emitter of barium slag, with an annual discharge of about 1 million tons of barium slag. A large amount of discharged barium slag is mainly disposed of by stockpiling, which not only occupies land and increases maintenance costs, but also poses a major threat to the environment. Most importantly, barium slag belongs to hazardous solid waste, which is a hazardous waste explicitly listed in the "National Hazardous Waste List". The storage, transportation and use of hazardous waste are strictly restricted. Therefore, the harmlessness of barium slag is very important. The reason why barium slag is hazardous waste is because its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00
Inventor 王宁顾汉念郭腾飞代杨
Owner 王明启
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