Method and device for producing ferronickel through nickel-laterite ore direct reduction and top-blown smelting method

A technology of laterite nickel ore and nickel iron, applied in the field of nickel metallurgy, can solve the problems of poor material adaptability, high energy consumption, environmental pollution, etc., and achieve the effects of large demand, high heat and wide sales.

Inactive Publication Date: 2017-10-20
SHENYANG RES INST OF NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention proposes a method and device for producing ferronickel by direct reduction of laterite nickel ore - gas top-blowing smelting, which solves the problems of high energy consumption, serious environmental pollution and poor material adaptability in the current pyroprocessing process of laterite nickel ore And other issues

Method used

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  • Method and device for producing ferronickel through nickel-laterite ore direct reduction and top-blown smelting method
  • Method and device for producing ferronickel through nickel-laterite ore direct reduction and top-blown smelting method

Examples

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Effect test

Embodiment 1

[0030] The laterite nickel ore that meets the process requirements and its mass proportion of 11% reduced coal and 6.5% quicklime are added to the mixing drum by a belt conveyor and mixed evenly; the mixed ingredients are added to the rotary kiln 1 through a belt conveyor and material pipe for reduction roasting. The reduction and roasting temperature is controlled at 1150°C, and the residence time of the material in the rotary kiln 1 is 120 minutes; the semi-molten slag ferronickel, which is the product of the reduction roasting, is directly flowed from the rotary kiln 1 through the chute 3 and automatically flows into the top-blown furnace from the feeding port 8 in the state of heat preservation. 2; in the top-blown furnace 2, the heat energy generated by the combustion of the gas injected by the burner 5 will further smelt the semi-molten slag ferronickel into liquid nickel-iron liquid and slag, and realize the slag and ferronickel in the heat preservation and settlement are...

Embodiment 2

[0032]The laterite nickel ore that meets the process requirements and its mass proportion of 12% reduced coal and 6.5% quicklime are added to the mixing drum by a belt conveyor and mixed evenly; the mixed ingredients are added to the rotary kiln 1 through the belt conveyor and material pipe for reduction roasting. The reduction roasting temperature is controlled at 1200°C, and the residence time of the material in the rotary kiln 1 is 120 minutes; the semi-molten slag ferronickel, which is the product of the reduction roasting, is directly flowed from the rotary kiln 1 through the chute 3 and automatically flows into the top-blown furnace from the feeding port 8 in the state of heat preservation. 2, in the top-blowing furnace 2, the heat energy generated by the combustion of the gas injected by the burner 5 further smelts the semi-molten slag ferronickel into liquid nickel-iron liquid and slag, and the slag is realized in the heat preservation and settlement area in the top-blow...

Embodiment 3

[0034] The laterite nickel ore that meets the process requirements and its mass proportion of 12.5% ​​reduced coal and 7.5% quicklime are added to the mixing drum by a belt conveyor and mixed evenly; the mixed ingredients are added to the rotary kiln 1 through a belt conveyor and material pipe for reduction roasting. The reduction roasting temperature is controlled at 1250°C, and the residence time of the material in the rotary kiln 1 is 150 minutes; the semi-molten slag ferronickel, which is the product of the reduction roasting, is directly flowed from the rotary kiln 1 through the chute 3 and automatically flows into the top-blown furnace from the feeding port 8 under the state of heat preservation. 2; in the top-blown furnace 2, the heat energy generated by the combustion of the gas injected by the burner 5 will further smelt the semi-molten slag ferronickel into liquid nickel-iron liquid and slag, and realize the slag and ferronickel in the heat preservation and settlement ...

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Abstract

The invention belongs to the field of nickel metallurgy and particularly relates to a method for producing ferronickel through a nickel-laterite ore rotary kiln direct reduction and flue gas top-blown smelting method and a smelting device adopting the same. The method comprises the following steps of (1) drying treatment of nickel-laterite ores; (2) crushing and screening; (3) ingredient mixing; (4) reduction roasting; and (5) flue gas top-blown smelting. By means of the method, the problems of high energy consumption, serious environmental pollution, poor material adaptability and the like in the process of treating nickel-laterite ores through an existing pyrogenic process are solved.

Description

technical field [0001] The invention belongs to the technical field of nickel metallurgy, and in particular relates to a method and a device for producing ferronickel from laterite nickel ore, in particular to a method for producing ferronickel by direct reduction-gas top-blown smelting of a laterite nickel ore rotary kiln and a smelting device thereof. Background technique [0002] The largest application area of ​​nickel is stainless steel. With the adjustment of the stainless steel industry structure and product structure, the proportion of high-end varieties will further increase, and the amount of nickel used in the stainless steel field will continue to increase. At present, 3 / 5 of the world's nickel is produced from nickel sulfide ore. With the gradual depletion of nickel sulfide ore resources with mining significance, the development and utilization of nickel oxide ore with reserves accounting for 60.6% of the total nickel resources has attracted more and more atten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B23/02C21B13/14F27D17/00
CPCC22B1/02C21B13/0006C21B13/14C22B23/005C22B23/023F27D17/004
Inventor 尹文新李淑梅李辉赵景富张向军孙镇丛自范杨超郑鹏
Owner SHENYANG RES INST OF NONFERROUS METALS
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