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Pressure oxidation leaching-out method for nickel-cobalt oxide ore

A technology of oxidized ore and leaching method, which is applied in the field of nickel-cobalt oxidized ore pressure oxidation leaching method, can solve problems such as environmental pollution, achieve the effects of reducing production costs, being conducive to environmental protection, and expanding the scope of adaptability

Inactive Publication Date: 2007-03-07
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a nickel-cobalt oxide ore pressurized oxidation leaching method, the method can simplify the process flow, thereby saving investment and production energy consumption, reducing production costs, and can also solve the problem of environmental pollution, while also improving the Comprehensive recycling of by-products in the production process

Method used

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  • Pressure oxidation leaching-out method for nickel-cobalt oxide ore

Examples

Experimental program
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Effect test

example 1

[0030](1). Grinding nickel-cobalt oxide ore slurry, with nickel-cobalt oxide ore 108.3g, the composition is (%wt) Ni1.70, Co0.046, Fe11.2, MgO27.0, Si35.22; add water and grind into The pulp is sent to the pulp preheater;

[0031] (2). Add sulfur slurry, preheat the nickel-cobalt oxide ore slurry to a temperature of 180°C in the slurry preheater, and then add sulfur slurry. The added amount is 37.7g of elemental sulfur in the sulfur slurry and 600ml of water;

[0032] (3). Pump the nickel-cobalt oxidized ore slurry added with sulfur powder after preheating into the autoclave. When the temperature in the autoclave is 180°C, oxygen is charged into the autoclave, and the oxygen partial pressure is 0.7MPa. The stirring line speed is 3.0m / s, the elemental sulfur of the sulfur slurry oxidizes with the oxygen filled in the kettle to generate sulfuric acid, and the sulfuric acid reacts with the nickel-cobalt oxide ore at the same time, leaching the corresponding components and compone...

Embodiment 2

[0038] (1). The thickener underflow pulp after the graded dehydration of nickel laterite ore is used. The amount of nickel-cobalt oxide ore is 134.6g, and the composition is (%wt) Ni0.95, Co0.17, Fe42.2, Mg1.44, Mn1. 23, Cr0.37, Al5.12, Si4.90 are sent directly to the pulp preheater;

[0039] (2). Add sulfide ore concentrate slurry, preheat the nickel-cobalt oxide ore slurry to a temperature of 180°C in the slurry preheater, add 33.4g of cobalt-sulfur concentrate, and its composition is Ni0.083%, Co0.14 %, Cu0.36%, S37.42%, add 600ml of water and mix with the nickel-cobalt oxide slurry and preheat together;

[0040] (3). Pump the nickel-cobalt oxide ore slurry added with cobalt-sulfur concentrate slurry after preheating into the autoclave, and fill the autoclave with oxygen when the temperature in the autoclave is 180°C, and the oxygen partial pressure is 0.9MPa. The stirring line speed in the kettle is 3.0m / s, the elemental sulfur of the cobalt-sulfur concentrate pulp and th...

Embodiment 3

[0045] (1). Grinding the nickel-cobalt oxide ore slurry, the nickel-cobalt oxide ore 168g, the composition is (%wt) Ni0.95, Co0.17, Fe42.2, Mg1.44, Mn1.23, Cr0.37, Al5 .12, Si4.9 is ground into pulp after adding water and sent to the pulp preheater;

[0046] (2).Add sulfide ore concentrate slurry and sulfur powder slurry, preheat the nickel-cobalt oxide ore slurry to a temperature of 180°C in the slurry preheater, add 80.7g of cobalt-sulfur concentrate slurry, the composition is: Ni0.083 %, Co0.14%, Cu0.36%, S37.42%, add 30.2g of sulfur slurry, add 600ml of water, mix with cobalt-sulfur concentrate slurry and nickel-cobalt oxide slurry and preheat together;

[0047] (3). After preheating, the nickel-cobalt oxide ore slurry added with cobalt-sulfur concentrate slurry and sulfur powder slurry is pumped into the autoclave, and oxygen is charged into the autoclave when the temperature in the autoclave is 180°C. The partial pressure is 1.0MPa, the linear velocity of stirring in th...

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Abstract

This invention discloses a nickel cobalt oxide ore pressure ore oxygenation leaching method, which includes the technique flow of milling the nickel cobalt oxide paste, adding sulfur powder paste or sulfuration refining paste, high-pressure still oxidization, automatic steaming of flash groove, flocculating agent adding, 7-grade reflux thick cleaning, distilling nickel cobalt and comprehensively recycling bitter salt. It has high leaching ratio of leaching nickel cobalt metals and the relative components. This invention greatly improves the present method that adds pressure and acid dips nickel cobalt oxide ores and lowers the investment, reduces the operation workers, saves the energy and improve the environment, lowers the cost and expands the utilization range of this leaching method and can comprehensively uses the other components.

Description

Technical field [0001] The invention relates to the technical field of chemical metallurgy refining, in particular to a pressure oxidation leaching method of nickel-cobalt oxide ore. Background technique [0002] In today's chemical metallurgical refining technology field, the traditional process method of pressure acid leaching from nickel-cobalt oxide ore is still widely used. As we all know, nickel-cobalt oxide ore has different grades and gangue types, and the fire method can be used respectively. Metallurgical and hydrometallurgical processes, refining and producing ferronickel, sintered nickel oxide, nickel-cobalt sulfide mixture, nickel-cobalt hydroxide and nickel-cobalt-rich leaching solution, and then refining to produce pure metal, metal powder or its salts. The oxidized ore processed by pyrometallurgy requires higher nickel content, such as the nickel-cobalt oxidized ore processed by the rotary kiln electric furnace reduction method and the rotary kiln direct redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B3/08C22B23/00
CPCY02P10/20
Inventor 黄振华何德礼
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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