Process method for extracting cobalt and nickel from manganese waste slag

A process method and technology of manganese waste slag, applied in the field of comprehensive utilization of resources, can solve the problems of high energy consumption, pollution, and high cost of full wet extraction and separation by pyrolysis, and achieve good separation effect, cost reduction, and high iron removal efficiency.

Active Publication Date: 2015-09-16
UNIV OF SCI & TECH BEIJING
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  • Description
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Problems solved by technology

[0005] In order to overcome the disadvantages of high energy consumption and serio

Method used

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  • Process method for extracting cobalt and nickel from manganese waste slag

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Effect test

Embodiment 1

[0030] (1) Oxidation roasting-dilute sulfuric acid leaching: After grinding the slag, pass it through an 80-mesh sieve, and roast it at 300°C for 4 hours in an air atmosphere; take 1000g of the burned ore, add 0.2mol / L H 2 SO 4 The solution was 1500mL stirred and acid leached for 10 hours, most of the cobalt, nickel, and part of the iron entered the solution, and the leached solution was separated from the solid-liquid-liquid, and the leached residue was washed several times by suction filtration or centrifugation, and the filter residue was discarded. The leaching rate of Co was 94%, the leaching rate of Ni was 70%, the leaching rate of Mn was 90%, the leaching rate of Fe was 10%, and the leaching rate of Mg was 66%.

[0031] (2) Oxidative hydrolysis to remove iron: add 6.0gNaClO in the filtrate in (1) step 3 and 13.0gNa 2 CO 3 Mix the solution, adjust the pH of the solution to 4.0, react with electric stirring for 20 minutes, then heat and boil for 10 minutes to obtain Fe...

Embodiment 2

[0038] (1) Oxidation roasting-dilute sulfuric acid leaching: After grinding the slag, pass it through an 80-mesh sieve, and roast it at 450°C for 3 hours in an oxygen atmosphere; take 1000g of the burned ore, add 0.2mol / L H 2 SO 4 The solution is 2500mL stirred and acid leached for 10h, most of the cobalt, nickel, and part of the iron enter the solution, the leached solution is separated from the solid-liquid-liquid, and the leached residue is washed several times by suction filtration or centrifugation, and the filter residue is discarded. The leaching rate of Co was 95.6%, the leaching rate of Ni was 72.1%, the leaching rate of Mn was 92.0%, the leaching rate of Fe was 7.5%, and the leaching rate of Mg was 60.2%.

[0039] (2) Oxidative hydrolysis to remove iron: add 5.5gNaClO in the filtrate in (1) step 3 and 11.0gNa 2 CO 3 Mix the solution, adjust the pH of the solution to 5.0, react with electric stirring for 20 minutes, then heat and boil for 10 minutes to obtain Fe 2...

Embodiment 3

[0046] (1) Oxidation roasting-dilute sulfuric acid leaching: After grinding the slag, pass it through an 80-mesh sieve, and roast it at 600°C for 2 hours in an oxygen atmosphere; take 1000g of the burnt ore, add 0.5mol / L H 2 SO 4 The solution was 1500mL stirred and acid leached for 10 hours, most of the cobalt, nickel, and part of the iron entered the solution, and the leached solution was separated from the solid-liquid-liquid, and the leached residue was washed several times by suction filtration or centrifugation, and the filter residue was discarded. The leaching rate of Co was 94.9%, the leaching rate of Ni was 71.9%, the leaching rate of Mn was 92.0%, the leaching rate of Fe was 9.3%, and the leaching rate of Mg was 63.8%.

[0047] (2) Oxidative hydrolysis to remove iron: add 5.5gNaClO in the filtrate in (1) step 3 and 11.0gNa 2 CO 3 Mix the solution, adjust the pH of the solution to 5.0, react with electric stirring for 20 minutes, then heat and boil for 10 minutes t...

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Abstract

The invention discloses a process method for extracting cobalt and nickel from manganese waste slag, belonging to the field of comprehensive utilization of resources. The process method comprises the steps of carrying out oxidizing roasting and acid leaching, removing iron by virtue of oxidation hydrolysis, separating cobalt, nickel and manganese by virtue of precipitation, carrying out oxidizing and acid dissolving on cobalt sulfide and nickel sulfide, and separating cobalt and nickel by virtue of oxidizing hydrolysis. According to the method, the problem of high energy consumption, high pollution and high cost in traditional complex cobalt and nickel extraction industries are solved; the method is applicable to industries for extracting cobalt and nickel from mineral slag, and metals such as cobalt and nickel can be directly separated from the manganese waste slag by virtue of a simple process having the characteristics of high efficiency, low pollution, low cost and short period. According to the process method iron is removed by virtue of an oxidizing hydrolysis method, so that the iron removal efficiency is high, the loss ratio of valuable components is low, the operability is strong, and the cost is low.

Description

technical field [0001] The invention belongs to the field of comprehensive resource utilization, and relates to a method for extracting cobalt and nickel from manganese waste residue and comprehensively utilizing valuable metals. Background technique [0002] As an important strategic resource, cobalt and nickel resources are important raw materials for the manufacture of special steels, heat-resistant alloys, corrosion-resistant alloys, magnetic alloys and hard alloys. They are often used in the form of oxides and compounds in aerospace, mechanical Manufacturing, electronic instruments, petrochemical and battery industries. [0003] There are almost no independent deposits of cobalt, and it is mainly associated with iron, copper, nickel, manganese and other minerals. Due to its strong migration ability, 90% of cobalt is dispersed in the crust; and because of its inherent duality of iron and sulfur, Therefore, it is mostly produced as associated metals, and rarely forms ind...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B23/00
CPCY02P10/20
Inventor 李文军付月慧曹世文唐巍孙长艳周花蕾常志东
Owner UNIV OF SCI & TECH BEIJING
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