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Comprehensive reutilization method for laterite-nickel ore

A technology of laterite nickel ore and matte nickel, which is applied in the field of comprehensive recycling of laterite nickel ore, can solve the problems of short process and low comprehensive utilization of resources, and achieve good economic benefits and environmental protection

Inactive Publication Date: 2008-10-15
ZHENGZHOU YONGTONG SPECIAL STEEL
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for the comprehensive recovery and utilization of laterite nickel ore with good resource comprehensive utilization, relatively simple process and short process for the deficiency of low comprehensive resource utilization in the traditional laterite nickel ore treatment process

Method used

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  • Comprehensive reutilization method for laterite-nickel ore

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] The laterite nickel ore composition used: Ni0.8%, Fe43%, Co0.1%, MgO3.65%, SiO27.7%, CaO2.1%, Al2O36.08%, Cr1.72%.

[0030] The blast furnace vulcanization smelting conditions are: smelting temperature 1350°C, coke ratio 25%, pyrite addition 5%, calcium sulfate addition 10%.

[0031] The electric furnace reduction smelting conditions are: smelting temperature 1550°C, coke ratio 6%, coal ratio 8%.

[0032] The sulfation roasting conditions are: roasting temperature 600°C, 1.1 times the theoretical air volume, time 3h.

[0033] The leaching conditions are: temperature 95°C, sulfuric acid content 80g / L, time 2h.

[0034] The test results are: low nickel matte contains 11.5% nickel, 1.4% cobalt, 58% iron and 23% sulfur. The semi-steel alloy contains 85% iron, 0.6% sulfur, 1% carbon and 5% silicon.

[0035] Boiling roasting flue gas contains SO26.5%.

[0036] The leaching results are as follows: the nickel leaching rate is 97%, the cobalt leaching rate is 94%, and the ir...

example 2

[0038] The laterite nickel ore composition used: Ni1%, Fe45%, Co0.1%, MgO5.42%, SiO26.9%, CaO3.2%, Al2O38.02%, Cr2.22%.

[0039] The blast furnace vulcanization smelting conditions are: smelting temperature 1350°C, coke ratio 25%, pyrite addition 5%, calcium sulfate addition 10%.

[0040] The electric furnace reduction smelting conditions are: smelting temperature 1550°C, coke ratio 6%, coal ratio 8%.

[0041] The sulfation roasting conditions are: roasting temperature 580°C, 1.1 times the theoretical air volume, and time 3h.

[0042] The leaching conditions are: temperature 95°C, sulfuric acid content 80g / L, time 4h.

[0043]The test results are: low nickel matte contains 12% nickel, 1.3% cobalt, 56% iron and 22.5% sulfur. The semi-steel alloy contains 83% iron, 0.5% sulfur, 0.9% carbon and 6% silicon.

[0044] Boiling roasting flue gas contains SO26.8%.

[0045] The leaching results are as follows: the leaching rate of nickel is 98%, the leaching rate of cobalt is 94.5%,...

example 3

[0047] The laterite nickel ore composition used: Ni1.2%, Fe40%, Co0.08%, MgO2.36%, SiO28.7%, CaO3.2%, Al2O35.1%, Cr2.46%.

[0048] The blast furnace vulcanization smelting conditions are as follows: smelting temperature 1350°C, coke ratio 26%, pyrite addition 4%, calcium sulfate addition 12%.

[0049] The electric furnace reduction smelting conditions are: smelting temperature 1550°C, coke ratio 6%, coal ratio 8%.

[0050] The sulfation roasting conditions are: roasting temperature 560°C, 1.1 times the theoretical air volume, time 4h.

[0051] The leaching conditions are: temperature 95°C, sulfuric acid content 80g / L, time 4h.

[0052] The test results are: low nickel matte contains 10.2% nickel, 1.3% cobalt, 57% iron and 22% sulfur. The semi-steel alloy contains 83% iron, 0.7% sulfur, 1.2% carbon and 6% silicon.

[0053] Boiling roasting flue gas contains SO26.7%.

[0054] The leaching results are as follows: the nickel leaching rate is 96%, the cobalt leaching rate is 93...

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Abstract

The invention relates to a metallurgy method for extracting nickel, cobalt and ferrum from a laterite-nickel ore. The invention discloses a comprehensive recycling method for a laterite-nickel ore, comprising the following steps of: A, processing the laterite-nickel ore by adopting the sulphidizing smelting to produce low nickel matte; B, processing directly sulphidizing smelting slag with melting state by adopting the reduction smelting for an ore smelting electric arc furnace to produce a semi-steel alloy with more than 80 percent of ferrum, then sending to a revolving furnace to smelt into qualified molten steel; or processing directly sulphidizing smelting slag with melting state by adopting the reduction smelting for the electric arc furnace to obtain the qualified molten steel; C, processing the low nickel matte by adopting the sulfation roasting-acid leaching to produce sulfuric acid and iron ore concentrate with more than 60 percent of ferrum; D, processing the leaching liquid of nickel and cobalt by adopting solvent extraction to produce a high-purity cobalt salt product. The metallurgy method has excellent effects on the aspects of process flow, resource comprehensive utilization, economic benefit and environment protection.

Description

technical field [0001] The present invention relates to a metallurgical method for extracting nickel, cobalt and iron from laterite nickel ore, in particular to a comprehensive method for producing semi-steel alloy laterite nickel ore directly from molten slag by submerged thermal electric furnace reduction technology or electric arc furnace reduction technology Recycling methods. Background technique [0002] The traditional laterite nickel ore extraction technologies include rotary kiln drying pre-reduction-electric furnace reduction smelting to produce ferronickel; sintering-blast furnace vulcanization smelting to produce low matte nickel; sintering-blast furnace reduction smelting to produce nickel pig iron; pressurized acid leaching and reduction roasting-ammonia leaching Wait. Rotary kiln drying pre-reduction-electric furnace reduction smelting is a classic process for processing nickel laterite ore. The process is as follows: Nickel laterite ore with a water content ...

Claims

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Application Information

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IPC IPC(8): C22B23/00C21B11/00
CPCY02P10/20
Inventor 董书通赵平王成彦
Owner ZHENGZHOU YONGTONG SPECIAL STEEL
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