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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Embodiment 1: A method for extracting nickel or cobalt from nickel ore by chlorination roasting-leaching method, including the following steps:

[0022] (1) The nickel ore drying powder is finely ground. The drying and grinding can be completed in one equipment or step by step. The hot gas used for drying is the hot exhaust gas generated in 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 materials are fed into the kiln. The bulk material can be fed directly into the roasting kiln, or it can be pelletized and fed 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 am...

Example Embodiment

[0028] Embodiment 2: A method for extracting nickel or cobalt from nickel ore by chlorination roasting-leaching method, including the following steps:

[0029] (1) The nickel ore drying powder is finely ground. The drying and grinding can be completed in one equipment or step by step. The hot gas used for drying is the hot exhaust gas generated in the combustion chamber of the heating furnace. The nickel ore is nickel oxide ore, which contains 1.42% nickel, 0.04% cobalt, and 22.50% iron.

[0030] (2) The powdered nickel oxide ore is fully mixed with a certain amount of ammonium chloride, and the weight ratio of ammonium chloride to nickel oxide ore is 0.8:1, and the mixed materials are fed into the kiln. The bulk material can be fed directly into the roasting kiln, or it can be pelletized and fed 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 three sections: the temperature of ...

Example Embodiment

[0035] Example 3:

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

[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 materials are fed into the kiln. The bulk material can be fed directly into the roasting kiln, or it can be pelletized and fed 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 recovery section is 150-30...

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PUM

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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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