Electrolytic manganese residue curing/stabilizing treatment method

A technology of electrolytic manganese slag and treatment method, which is applied in the direction of solid waste removal, etc., can solve the problems of inability to achieve, high treatment cost, and high manganese slag leaching solution, and achieves the improvement of kinetic conditions, reduction of lime addition, and simplification of technological processes. Effect

Active Publication Date: 2015-01-28
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dosage of alkaline chemicals is too high. On the one hand, the pH of the manganese slag leaching solution after treatment will be too high, which cannot meet the standard for the treatment of solid waste in the "General Industrial Solid Waste Storage/Disposal Site Pollution Con

Method used

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  • Electrolytic manganese residue curing/stabilizing treatment method
  • Electrolytic manganese residue curing/stabilizing treatment method
  • Electrolytic manganese residue curing/stabilizing treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Test materials: 100 parts of fresh electrolytic manganese slag, the total amount of alkaline agent is 6 parts, add in three times, add 2 parts, 2 parts, 2 parts respectively each time, the amount of added water is 1 part, and the amount of sodium hexametaphosphate added is 0.1 part. The test steps are as follows:

[0036]After the fresh electrolytic manganese slag is added to the planetary mixer, first add water to the electrolytic manganese slag, then add the first-level alkaline agent, add sodium hexametaphosphate when stirring for 30 seconds; after stirring for 2 minutes, add the second-level alkaline agent , and then stir for 1 minute to add the third-level alkaline agent, and stir for another 2 minutes after adding the agent. Then transfer the stirred manganese slag to a rotary releaser for continuous ammonia treatment for 30 minutes, and then obtain solidified / stabilized electrolytic manganese slag after unloading.

Embodiment 2

[0038] Test materials: 100 parts of fresh electrolytic manganese slag, 8 parts of the total amount of alkaline chemicals, added in four times, each time adding 4 parts, 2 parts, 1 part, 1 part respectively, the amount of additional water is 1 part, hexametaphosphoric acid Sodium was added in an amount of 0.3 parts. The test steps are as follows:

[0039] After the fresh electrolytic manganese slag is added to the twin-shaft mixer, first add water to the electrolytic manganese slag, then add the first-level alkaline agent, add sodium hexametaphosphate when stirring for 30 seconds; after stirring for 5 minutes, add the second-level alkaline agent For the medicament, stir for another 2 minutes to add the third-level alkaline medicament, stir for another 2 minutes to add the fourth-level alkaline medicament, and stir for 5 minutes after the addition of the medicament. Then transfer the stirred manganese slag into the rotary releaser for continuous treatment with ammonia gas for 5...

Embodiment 3

[0041] Test materials: 100 parts of fresh electrolytic manganese slag, 7 parts of the total amount of alkaline chemicals, added in two times, 5.6 parts and 1.4 parts were added each time, 1.5 parts of additional water, 0.3 parts of sodium hexametaphosphate . The test steps are as follows:

[0042] After the fresh manganese slag is added to the planetary mixer, first add water to the manganese slag, then add the first-level alkaline agent, and add sodium hexametaphosphate when stirring for 30 seconds; after stirring for 10 minutes, add the second-level alkaline agent to complete Stir for 5 minutes after addition of the medicament. Then transfer the stirred manganese slag to a rotary releaser for continuous ammonia treatment for 30 minutes, and then obtain solidified / stabilized electrolytic manganese slag after unloading.

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Abstract

The invention discloses an electrolytic manganese residue curing/stabilizing treatment method. The method comprises the following steps: (1) adding electrolytic manganese residue into a mixer to mix, and adding water to the manganese residue; (2) adding alkaline medicament in the mixing process for several times, adding sodium hexametaphosphate after adding the alkaline medicament for the first time; (3) placing the mixed electrolytic manganese residue into a rotary releaser to perform ammonia gas continuous treatment, and unloading to obtain cured/stabilized electrolytic manganese residue. On the premise of guaranteeing the curing/stabilizing effect of the manganese residue, the solid waste pH requirement after treatment is satisfied by adding the alkaline medicament for several times, the lime additive amount is obviously reduced, and the manganese curing/stabilizing treatment cost is reduced.

Description

technical field [0001] The invention relates to a solid waste treatment method, in particular to a solidification / stabilization treatment method for electrolytic manganese slag. Background technique [0002] my country is the world's largest producer, consumer and exporter of electrolytic manganese metal (referred to as "electrolytic manganese"). In 2012, my country's electrolytic manganese output reached 1.16 million tons, accounting for more than 98% of the world's output, of which 90% was used for domestic consumption. Electrolytic manganese slag is a waste residue of 23%-26% leachate produced by solid-liquid separation of manganese ore powder after sulfuric acid leaching. The manganese sulfate content in the leachate is about 110g / L, and the ammonium sulfate is about 120g / L. At present, every ton of electrolytic manganese produced in my country produces 8-10 tons of manganese slag. According to estimates, as of 2012, the country has accumulatively stockpiled 77.84 mill...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 但智钢段宁高武斌王志增王辉峰杜兵张海燕史菲菲
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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