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A kind of processing method of cobalt-nickel metallurgy waste water slag

A treatment method and a technology for waste water slag, applied to the improvement of process efficiency, instruments, optics, etc., can solve the problems of inability to realize full utilization of valuable metals, difficulty in recycling, non-compliance, etc., and achieve high added value and high recovery rate , the effect of avoiding the production of sulfur dioxide

Active Publication Date: 2020-05-26
方嘉城
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Because there are many types of metals contained in it, and the content of each component is almost the same, it is difficult to recycle them all by conventional treatment processes. Generally, acid is dissolved and then sulfide is used to precipitate zinc, cobalt, nickel, copper, and others. The elements re-enter the wastewater, and then are precipitated again, and then enter the wastewater slag, resulting in the gradual enrichment of magnesium, calcium, manganese and other elements in the wastewater, and the full utilization of various valuable metals cannot be realized, which is not in line with the current environmental requirements

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  • A kind of processing method of cobalt-nickel metallurgy waste water slag
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Examples

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Effect test

Embodiment 1

[0045] A method for treating cobalt-nickel metallurgical waste water slag includes the following steps:

[0046] (1) Pretreatment, add the waste water residue to water slurry and stir, then pass carbon dioxide gas into the slurry material, stir and react at 42℃ until the sulfate radical content in the solid material is less than 500ppm, then filter, add heat to the filter residue Wash with water until the sulfate content in the washing water is less than 0.1g / L, and the washing waste water residue is obtained;

[0047] (2) Put the washing waste water slag obtained in step (1) together with coke, silica, and copper scrap into a high-temperature smelting furnace for smelting, at a smelting temperature of 1050°C, while maintaining the carbon monoxide concentration in the smelting furnace at 800 ppm At the same time, the external blast enters the smelting furnace. The smelting time is 5.2 hours. At the same time, the upper part of the smelting furnace is equipped with a dust collection...

Embodiment 2

[0064] A method for treating cobalt-nickel metallurgical waste water slag includes the following steps:

[0065] (1) Pretreatment, add the waste water residue to water slurry and stir, then pass carbon dioxide gas into the slurry material, stir and react at 42℃ until the sulfate radical content in the solid material is less than 500ppm, then filter, add heat to the filter residue Wash with water until the sulfate content in the washing water is less than 0.1g / L, and the washing waste water residue is obtained;

[0066] (2) Put the washing waste water slag obtained in step (1) together with coke, silica, and copper scrap into a high-temperature smelting furnace for smelting at a smelting temperature of 985°C while maintaining the concentration of carbon monoxide in the smelting furnace at 800 ppm At the same time, the external blast enters the smelting furnace. The smelting time is 5.2 hours. At the same time, the upper part of the smelting furnace is equipped with a dust collection...

Embodiment 3

[0083] A method for treating cobalt-nickel metallurgical waste water slag includes the following steps:

[0084] (1) Pretreatment, add the waste water residue to water slurry and stir, then pass carbon dioxide gas into the slurry material, stir and react at 42℃ until the sulfate radical content in the solid material is less than 500ppm, then filter, add heat to the filter residue Wash with water until the sulfate content in the washing water is less than 0.1g / L, and the washing waste water residue is obtained;

[0085] (2) Put the washing waste water slag obtained in step (1) together with coke, silica, and copper scrap into a high-temperature smelting furnace for smelting at a smelting temperature of 1080°C while maintaining the concentration of carbon monoxide in the smelting furnace at 850 ppm At the same time, the external blast enters the smelting furnace. The smelting time is 5.2 hours. At the same time, the upper part of the smelting furnace is equipped with a dust collectio...

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Abstract

The invention discloses a treatment method for cobalt nickel metallurgy waste water slag. The waste water slag is added in water for pulping and stirring; carbon dioxide gas is introduced in pulp forfiltration and washing to obtain washed waste water slag; the obtained washed waste water slag, cokes, silicon dioxide and waste copper are put in a high-temperature smelting furnace for smelting; molten copper after smelting flows out from a furnace bottom, and flows into a mold to cool as a metal block; the metal block is put in an electrolytic bath for copper electrolytic refining to obtain cathode copper; calcium oxide is added in electrolyte for filtration to obtain first filtrate; a copper extracting line extracts copper to obtain raffinate containing cobalt and nickel; the raffinate isoxidized to obtain high cobalt hydroxide; the high cobalt hydroxide is mixed with cobalt acetate for calcining to obtain cabaltosic oxide; oxidized solution is extracted and separated to obtain nickelsulfate; and the nickel sulfate is concentrated and crystallized to obtain a nickel sulfate crystal. The treatment method is short in flow and simple in process, can realize separation and recovery of all components, and is high in recovery rate and product additional value.

Description

Technical field [0001] The invention relates to a method for treating cobalt-nickel metallurgical wastewater slag, and belongs to the technical field of waste treatment. Background technique [0002] As a strategic resource, cobalt and nickel have greatly improved their position in the industry. They are widely used in cemented carbide, functional ceramics, catalysts, military industry, and high-energy batteries, and are known as industrial monosodium glutamate. The production of cobalt and nickel is mainly based on hydrometallurgy. Mainly divided into the following steps: [0003] Leaching. As the first step of hydrometallurgy, the leaching rate directly determines the efficiency and benefit. After crushing, screening, enriching and other treatments, the valuable metals in the minerals are transferred to the solution. The leaching in the production of cobalt and nickel mainly includes acid leaching, chlorination leaching, ammonia leaching and high-pressure oxygen leaching. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C25C1/12C22B15/00C22B23/00C22B19/30C22B19/20
CPCC22B7/001C22B7/006C22B15/0028C22B19/20C22B19/30C22B23/04C25C1/12Y02P10/20
Inventor 方嘉城
Owner 方嘉城