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Method for extracting nickel or cobalt from nickel ore with chloridizing roasting-leaching method

A technology of chlorination roasting and leaching method, which is applied in the field of extracting nickel or cobalt from nickel ore by chlorination roasting-leaching method, which can solve the problems of ineffectiveness and achieve the effects of high grade, pollution reduction and high heat utilization rate

Inactive Publication Date: 2009-10-07
谢永巨 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology provides a technology to extract minerals by using ammonia salt, but this technology is directly applied to extract nickel ore with less nickel and cobalt content. Experiments have proved that direct use of this technology obviously cannot obtain ideal results.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: a kind of chlorination roasting-leaching method extracts nickel or cobalt method from nickel ore, comprises steps as follows:

[0022] (1) The nickel ore is dried and ground finely. The drying and grinding can be completed in one piece of equipment or in steps. The hot gas used for drying is the hot waste gas produced by the combustion chamber of the heating furnace. The nickel ore is nickel oxide ore, which contains 0.94% nickel, 0.06% cobalt and 50.14% iron.

[0023] (2) The ground nickel oxide ore is fully mixed with a certain amount of ammonium chloride, the weight ratio of ammonium chloride to nickel oxide ore is 0.3:1, and the mixed material is put into the kiln. The bulk material can be directly put into the roasting kiln, or it can be granulated and then put into the kiln.

[0024] (3) The mixture of nickel oxide ore and ammonium chloride is roasted in a closed kiln. The roasting temperature is divided into three sections: the temperature of the a...

Embodiment 2

[0028] Embodiment 2: a kind of chlorination roasting-leaching method gathers nickel ore to extract nickel or cobalt method, comprises steps as follows:

[0029] (1) The nickel ore is dried and ground finely. The drying and grinding can be completed in one piece of equipment or in steps. The hot gas used for drying is the hot waste gas produced by the combustion chamber of the heating furnace. Described nickel ore is nickel oxide ore, and nickel oxide ore contains nickel 1.42%, contains cobalt 0.04%, contains iron 22.50%,

[0030] (2) The ground nickel oxide ore is fully mixed with a certain amount of ammonium chloride, the weight ratio of ammonium chloride to nickel oxide ore is 0.8:1, and the mixed material is put into the kiln. The bulk material can be directly put into the roasting kiln, or it can be granulated and then put into the kiln.

[0031] (3) The mixture of nickel oxide ore and ammonium chloride is roasted in a closed kiln. The roasting temperature is divided into...

Embodiment 3

[0036] A method for extracting nickel or cobalt from nickel ore by chlorination roasting-leaching method, comprising the following steps: (1) drying and grinding the nickel ore finely, the drying and grinding can be completed in one device or in steps, The hot gas used for drying is the hot waste gas produced by the combustion chamber of the heating furnace. Described nickel ore is nickel oxide ore, and nickel oxide ore contains nickel 1.85%, iron-containing 12.83%,

[0037] (2) The ground nickel oxide ore is fully mixed with a certain amount of ammonium chloride, the weight ratio of ammonium chloride to nickel oxide ore is 1:1, and the mixed material is put into the kiln. The bulk material can be directly put into the roasting kiln, or it can be granulated and then put into the kiln.

[0038] (3) The mixture of nickel oxide ore and ammonium chloride is roasted in a closed kiln. The roasting temperature is divided into three sections: the temperature of the ammonium chloride ...

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Abstract

The present invention relates to a technique for extracting non-ferrous metal, and specifically to a method for extracting nickel or cobalt from nickel ore with chloridizing roasting-leaching method. The aim of the invention is to settle the technical problem for extracting nickel or cobalt from nickel ore. The method of the invention comprises the following steps: grinding the dried powder of nickel ore, mixing the nickel ore with ammonium chloride, then putting the mixed compound into a sealed kiln for calcining, directly leaching the roasted product, adjusting the pH value of leaching liquid with the ammonia water recycled from end gas in the kiln, and controlling the pH value to 6.5-7.5 for recycling the nickel or cobalt. The grade of nickel or cobalt concentrate recycled by deposition according to the invention is high and can obtain more than 30% of nickel content. The subsequent processing and utilizing are facilitated. No exhaust gas or wastewater is discharged in the industrial process. The requirement of green production is satisfied.

Description

technical field [0001] The invention relates to an extraction process of nonferrous metals, in particular to a method for extracting nickel or cobalt from nickel ore by a chlorination roasting-leaching method. Background technique [0002] Nickel oxide ore accounts for about 70% of the world's land-based nickel reserves. With the reduction of nickel sulfide ore resources, nickel oxide ore will become the main resource for obtaining nickel, especially in recent years. develop rapidly. [0003] The existing metallurgical methods of nickel oxide ore are divided into fire method, wet method, chlorination roasting method and so on. The fire method is mainly smelting ferronickel in submerged electric furnace or blast furnace, and the wet method is mainly acid leaching and reduction roasting-ammonia leaching technology. The fire process has the disadvantages of high energy consumption, large pollution, and inability to separate nickel and cobalt; the reduction roasting-ammonia le...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B1/08C22B3/04
CPCY02P10/20
Inventor 谢永巨李建斌张栋
Owner 谢永巨
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