Comprehensive utilization method for waste water containing high-concentration sodium sulfate based on wet metallurgy process

A hydrometallurgical, high-concentration technology, applied in the improvement of process efficiency, alkali metal sulfite/sulfite, alkali metal compounds, etc., can solve the problem of high cost of hydrometallurgy process, and solve the problem of excessive energy consumption Effect

Inactive Publication Date: 2018-04-06
SHANGHAI IND TECH INST
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of comprehensive utilization method based on high concentration sodium sulfate wastewater in the hydrometallurgical process, for solving the problem of high cost of the hydrometallurgical process in the prior art

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  • Comprehensive utilization method for waste water containing high-concentration sodium sulfate based on wet metallurgy process

Examples

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Effect test

Embodiment 1

[0040] Embodiment 1: Carry out hydrometallurgy for a certain nickel-containing ore (main components include Ni, Fe, Ca, etc.), determine the hydrogen ion concentration consumed according to the content of nickel and other metals in the ore, and carry out the leaching solution ratio on this basis deployment.

[0041] 1) Use a ball mill to crush the ore raw material, and keep more than 80% of the outlet particle size at 10mm.

[0042] 2) Transfer the crushed ore to the leaching equipment for leaching, the leaching temperature is 50°C, the total concentration of sulfate and sulfite in the leaching solution (containing sulfuric acid and sulfurous acid) is 3.4mol / L, and the concentration of hydrogen ions 1mol / L, solid-liquid separation is carried out after the leaching agent is completely consumed (leaching time is 12h), the leaching solution enters the next process, and the leaching residue continues to leaching;

[0043] 3) The leaching solution in step 2 is sent to the pretreat...

Embodiment 2

[0048] Embodiment 2: Carry out hydrometallurgy for a certain nickel-containing ore (main components include Ni, Fe, Ca, etc.), determine the hydrogen ion concentration consumed according to the content of nickel and other metals in the ore, and carry out the leaching solution ratio on this basis deployment.

[0049] 1) Use a ball mill to crush the ore raw material, and keep more than 80% of the outlet particle size at 5 mm.

[0050] 2) Transfer the crushed ore to the leaching equipment for leaching. The leaching temperature is 50°C. The total concentration of sulfate and sulfite in the leaching solution is 3mol / L, and the concentration of hydrogen ions is 1mol / L. After the agent is completely consumed, solid-liquid separation is carried out (leaching time is 6h), the leachate enters the next process, and the leaching residue continues to be leached;

[0051] 3) The leaching solution in step 2 is sent to the pretreatment tank for precipitation and iron removal, and then extrac...

Embodiment 3

[0056] Embodiment 3: Carry out hydrometallurgy for a certain nickel-containing ore (the main components include Ni, Fe, Ca, etc.), determine the hydrogen ion concentration consumed according to the content of nickel and other metals in the ore, and then carry out the leaching solution ratio on this basis deployment.

[0057] 1) Use a ball mill to crush the ore raw material, and keep more than 80% of the outlet particle size at 5 mm.

[0058] 2) Transfer the crushed ore to the leaching equipment for leaching. The leaching temperature is 40°C. The total concentration of sulfate and sulfite in the leaching solution is 2.8mol / L, and the concentration of hydrogen ions is 1mol / L. After the extraction agent is completely consumed, solid-liquid separation is carried out (leaching time is 24 hours), the leachate enters the next process, and the leaching residue continues to be leached;

[0059] 3) The leaching solution in step 2 is sent to the pretreatment tank for precipitation and i...

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Abstract

The invention provides a comprehensive utilization method for waste water containing high-concentration sodium sulfate based on the wet metallurgy process. The comprehensive utilization method at least comprises the following steps that (1) an appropriate quantity of leaching agent is added into an ore raw material, wherein the leaching agent at least comprises sulfate ions and sulfite ions, thensolid-liquid separation is conducted, and leaching slag and leaching liquid are obtained correspondingly; (2) the leaching liquid is pre-treated, namely still standing for sediment is conducted, the leaching liquid is subjected to organic solvent extraction, and an extraction agent and extraction liquid are obtained; (3) the extraction agent is subjected to saponification to obtain a sediment, theextraction liquid is subjected to electrochemical treatment, after calcium ions and organic matter are removed, cooling for crystallization is conducted, and crystals and clear liquid are obtained; (4) at least part of the clear liquid is dosed to obtain a leaching agent, the leaching agent and the leaching slag in the step (1) are mixed and reacted again, and thus reaction slag and secondary leaching liquid are obtained; and (5) at least part of the secondary leaching liquid is utilized to return to the step (1) to be mixed and reacted with to-be-treated ore. The comprehensive utilization method is low in cost and high in efficiency.

Description

technical field [0001] The invention relates to a reclaimed water reuse system for hydrometallurgical high-salt wastewater, in particular to a comprehensive resource recovery method for salt separation and reclaimed water reuse of sodium sulfate high-salt wastewater. Background technique [0002] As one of the modern metallurgical methods, hydrometallurgy plays an important role in the extraction of valuable materials (mostly metal elements). However, hydrometallurgy consumes a large amount of acid and alkali in the production process, which is in the form of salt Discharged from the waste water, the salt content of this part of the waste water is extremely high (mass fraction above 10%), and the discharge into the water body will cause a great impact on the water ecosystem. [0003] The existing treatment methods for this part of wastewater rich in metal elements are mainly to separate brine through thermal evaporation process (including multi-effect distillation, MVR, low-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/04C22B3/08C22B3/26C01D5/00
CPCC01D5/00C22B3/04C22B3/08C22B3/26Y02P10/20
Inventor 聂耳孙卓高维张哲娟朴贤卿
Owner SHANGHAI IND TECH INST
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