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Treatment method of aluminum-containing waste acid

A technology for waste acid and aluminum waste, applied in chemical instruments and methods, aluminum compounds, inorganic chemistry, etc., can solve the problems of low economic benefits and generate more industrial solid waste, and achieve high economic benefits, complete recovery, and treatment. thorough effect

Inactive Publication Date: 2018-11-20
HANGZHOU WIN WIN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a treatment method for aluminum-containing waste acid, especially (but not limited to) the treatment method for aluminum-containing waste acid produced in the extraction metallurgical process, which overcomes the low economic benefit in the above-mentioned aluminum-containing waste acid treatment method , still produce a lot of industrial solid waste

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  • Treatment method of aluminum-containing waste acid
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  • Treatment method of aluminum-containing waste acid

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Embodiment 1

[0045]The hydrogen ion concentration is 1.5mol / L, the aluminum ion concentration is 0.7mol / L, the cobalt ion concentration is 0.0038g / L, the nickel ion concentration is 0.0078g / L, the manganese ion content is 0.357g / L, and the copper ion content is 0.186g / L 1. Put aluminum-containing waste sulfuric acid with an iron ion content of 1.02g / L in the neutralization reactor, under the condition of strong stirring at 250-350rpm, add heavy magnesium oxide slurry with a quality of 95% to neutralize until the pH value of the solution is 2.0 . Use magnesium sulfate solution to adjust the molar ratio of magnesium to aluminum in the neutralizing solution to be 2.5:1. Prepare 1mol / L sodium carbonate solution and 2mol / L sodium hydroxide solution. Under the stirring condition of 50-120rpm, the temperature is controlled at 60°C, the magnesium-aluminum mixed solution and the sodium carbonate solution are added to the synthesis reaction kettle in parallel, and the pH value of the system is adju...

Embodiment 2

[0047] Take aluminum-containing waste sulfuric acid with a hydrogen ion concentration of 5mol / L, an aluminum ion concentration of 0.5mol / L, a manganese ion content of 0.147g / L, a copper ion content of 0.096g / L, and an iron ion content of 0.087g / L in the neutralization reaction In the kettle, under the condition of strong stirring at 250-350rpm, add light magnesia slurry with a quality of 99% to neutralize until the pH value of the solution is 1.0. Use sodium metaaluminate solution to adjust the molar ratio of neutralizing liquid magnesium to aluminum to 1:1. Prepare 2mol / L sodium carbonate solution and 3.5mol / L sodium hydroxide solution. Under the stirring condition of 50-120rpm, the temperature is controlled at 80°C, the magnesium-aluminum mixed solution and the sodium carbonate solution are added to the synthesis reaction kettle in parallel, and the pH value of the system is adjusted to 12 with sodium hydroxide to carry out the hydrotalcite synthesis reaction. The synthesiz...

Embodiment 3

[0049] The hydrogen ion concentration is 3.16mol / L, the aluminum ion concentration is 0.71mol / L, the zinc ion concentration is 0.41g / L, the manganese ion content is 0.27g / L, the copper ion content is 0.12g / L, and the iron ion content is 1.40g / L The aluminum-containing waste hydrochloric acid is placed in a neutralization reactor, and under the condition of strong stirring at 250-350rpm, it is neutralized by adding light magnesia slurry with a quality of 90% to a pH value of 0.8. Use aluminum hydroxide slurry to adjust the molar ratio of neutralized liquid magnesium to aluminum to 2:1. Prepare 0.5mol / L sodium carbonate solution and 1.5mol / L sodium hydroxide solution. Under the stirring condition of 50-120rpm, the temperature is controlled at 90°C, the magnesium-aluminum mixed solution and the sodium carbonate solution are added to the synthesis reaction kettle in parallel, and the pH value of the system is adjusted to 11 with the sodium hydroxide solution to carry out the hydro...

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Abstract

The invention discloses a treatment method of aluminum-containing waste acid. The treatment method comprises the following steps: firstly neutralizing the aluminum-containing waste acid to certain acidity with activated magnesium oxide; then adjusting a magnesium-aluminum proportion with magnesium salt and aluminum salt; under a stirring condition, controlling reaction temperature, adding the adjusted magnesium-aluminum mixed solution and a sodium carbonate solution in a certain proportion into a synthesis reaction kettle in a parallel flow manner, controlling the pH value of the system by using the sodium carbonate solution so as to perform hydrotalcite synthesis reaction, and then performing aging, filtering, washing, drying and smashing procedures to obtain hydrotalcite. The invention further discloses further modification of the obtained hydrotalcite, so as to improve the usability and the economical benefit of a product. The treatment method of the aluminum-containing waste acid is high in economical benefit, thorough in treatment and safe to recycle.

Description

technical field [0001] The invention relates to the technical field of waste acid treatment, in particular to a treatment method for aluminum-containing waste acid. Background technique [0002] Extractive metallurgy is widely used in the chemical process of extraction, separation, and purification of valuable components, and its application fields cover almost all metal extractions except iron and steel. Its advantages are low production cost, easy continuous production, no high-temperature dust hazard in the production process, and less toxic gas emission. With the decline of ore grade and the country's increasingly stringent environmental protection requirements, extractive metallurgy plays an increasingly important role in the metal smelting process. However, in most acidic extraction metallurgical processes, a large amount of waste acid containing metal ions will be produced, especially in some typical extraction metallurgical processes, such as: extraction and smeltin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/00
CPCC01P2004/03C01P2002/72C01P2006/80C01F7/785
Inventor 李成文罗吉
Owner HANGZHOU WIN WIN TECH CO LTD
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