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Treatment method for cobalt-nickel metallurgical wastewater slag

A treatment method and technology for waste water slag, applied in the field of waste treatment, can solve the problems of not being able to fully utilize valuable metals, difficult to recycle, non-conformity, etc., and achieve the effects of low cost, high added value and high recovery rate

Active Publication Date: 2018-07-10
湖南荣桓科技有限公司
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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

Method used

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  • Treatment method for cobalt-nickel metallurgical wastewater slag
  • Treatment method for cobalt-nickel metallurgical wastewater slag
  • Treatment method for cobalt-nickel metallurgical wastewater slag

Examples

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Embodiment 1

[0051] A treatment method for cobalt-nickel metallurgy waste water slag, which comprises the following steps:

[0052] (1) Pretreatment, mixing waste water slag with coke powder, then putting it into a rotary kiln, drying at a temperature of 210°C until the moisture is less than 1%, and then putting it into a crusher for crushing until the material passes through a 90-mesh sieve ;

[0053] (2) Put the sieved material in step (1) into a sagger, then put it into a reduction furnace for reduction, the reduction temperature is 680° C., and the reduction time is 4.5 hours, then pass through a 90-mesh sieve after crushing;

[0054] (3) adding hot pure water to the sieved material in step (2) for washing, the washing temperature is 80° C., while maintaining the pH of the washing process as 7.7, stirring for 1.8 hours, and then filtering to obtain the first filtrate and the first filter residue. The first filtrate and the P204 extractant are mixed in two stages, and the aqueous phase...

Embodiment 2

[0079] A treatment method for cobalt-nickel metallurgy waste water slag, which comprises the following steps:

[0080] (1) Pretreatment, mixing waste water slag with coke powder, then putting it into a rotary kiln, drying at a temperature of 210°C until the moisture is less than 1%, and then putting it into a crusher for crushing until the material passes through a 90-mesh sieve ;

[0081] (2) Put the sieved material in step (1) into a sagger, then put it into a reduction furnace for reduction, the reduction temperature is 680° C., and the reduction time is 4.5 hours, then pass through a 90-mesh sieve after crushing;

[0082] (3) adding hot pure water to the sieved material in step (2) for washing, the washing temperature is 80° C., while maintaining the pH of the washing process as 7.7, stirring for 1.8 hours, and then filtering to obtain the first filtrate and the first filter residue. The first filtrate and the P204 extractant are mixed in two stages, and the aqueous phase...

Embodiment 3

[0106] A treatment method for cobalt-nickel metallurgy waste water slag, which comprises the following steps:

[0107] (1) Pretreatment, mixing waste water slag with coke powder, then putting it into a rotary kiln, drying at a temperature of 212°C until the moisture is less than 1%, and then putting it into a crusher for crushing until the material passes through a 95-mesh sieve ;

[0108] (2) Put the sieved material in step (1) into a sagger, then put it into a reduction furnace for reduction, the reduction temperature is 812° C., and the reduction time is 4.8 hours, then pass through an 85-mesh sieve after crushing;

[0109] (3) adding hot pure water to the sieved material in step (2) for washing, the washing temperature is 78° C., while maintaining the pH of the washing process as 7.6, stirring for 1.8 hours, and then filtering to obtain the first filtrate and the first filter residue. The first filtrate and the P204 extractant are mixed in two stages, and the aqueous phas...

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Abstract

The invention discloses a treatment method for cobalt-nickel metallurgical wastewater slag. The treatment method is characterized in that coke is reduced for reducing metal such as zinc, manganese, cobalt, nickel, copper and iron in wastewater slag into elementary substances, calcium, magnesium, sodium and the like cannot be reduced into elementary substances, and washing is adopted for dissolvingcalcium, magnesium and sodium into hot water, so that calcium, magnesium and sodium are separated from other metals; zinc is separated from other metals through alkaline dissolving, properties of copper powder are relatively stable through acid dissolving, and copper powder does not react with acid, so that copper powder is obtained; and after iron of a solution for dissolving is removed througha sodium jarosite process, potassium permanganate is adopted for oxidizing manganese ions into manganese dioxide, and the rest of a cobalt-nickel solution is prepared into nickel-cobalt binary precipitates through homogeneous precipitation. The treatment method is short in flow, is simple in process, can realize separating and recycling of all components, is high in recovery rate; and the finallyobtained product is high in purity and is great in product additional value.

Description

technical field [0001] The invention relates to a treatment method for cobalt-nickel metallurgy waste water slag, belonging to the technical field of waste treatment. Background technique [0002] As a strategic resource, the status of cobalt and nickel in the industry has been greatly improved. It is widely used in cemented carbide, functional ceramics, catalysts, military industry, and high-energy batteries. It is known as industrial monosodium glutamate. The production of cobalt and nickel is mainly based on hydrometallurgy. It is mainly divided into the following steps: [0003] leach. As the first step of hydrometallurgy, the leaching rate directly determines the efficiency and benefit. After the raw ore has been crushed, screened, enriched and other treatments, the valuable metals in the ore are transferred to the solution. The leaching in the production of cobalt and nickel mainly includes acid leaching, chloride leaching, ammonia leaching and high pressure oxygen...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B5/10
CPCC22B5/10C22B7/001C22B7/007C22B7/008C22B7/04Y02P10/20
Inventor 蒋央芳
Owner 湖南荣桓科技有限公司
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