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Method for producing nickel matte from sulfur-containing waste residue and laterite-nickel ore

A technology of laterite nickel ore and joint production is applied in the field of nickel matte production, which can solve the problems of high sulfur content and environmental pollution, and achieve the effects of remarkable economic benefits, solving pollution problems and simple operation.

Inactive Publication Date: 2013-05-15
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] On the basis of electric furnace smelting, the present invention makes full use of the characteristics of high sulfur content in waste slag produced by wet smelting of laterite nickel ore (see Table 1 for the typical composition of waste slag), uses the waste slag as vulcanizing agent and laterite nickel ore as raw material, and adopts AC Nickel matte is produced by vulcanization and smelting in electric furnace or DC electric furnace, which reduces the production cost, solves the environmental pollution problem of sulfur-containing waste residue, and realizes the comprehensive reuse of waste resources

Method used

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  • Method for producing nickel matte from sulfur-containing waste residue and laterite-nickel ore

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Effect test

Embodiment 1

[0024] (1) Crush the laterite nickel ore to a particle size of 30mm to 100mm, and granulate the particles smaller than 30mm to 30mm to 100mm, then put them into the rotary kiln, dry at 800°C for 5 hours, and then mix the sulfur-containing waste residue with the laterite nickel The mass ratio of the ore is 1:25, the mass ratio of the reducing agent to the laterite nickel ore is 1:20, and the sulfur-containing waste residue, coal and laterite nickel ore are mixed evenly; the sulfur-containing waste residue is the leaching of nickel sulfide concentrate by wet process Slag, which contains 85% elemental sulfur;

[0025] (2) In an AC electric furnace, after melting the mixture obtained in step (1) at 1300°C for 30 minutes, the upper layer is slag, and the lower layer is nickel-sulfur. The obtained nickel matte product contains 12% nickel, 21% sulfur, and the recovery rate of nickel is 85%. The flue gas formed during the smelting process contains CO and a small amount of SO 2 Gas, ...

Embodiment 2

[0027] (1) Crush the laterite nickel ore to a particle size of 30mm to 100mm, and granulate the particles smaller than 30mm to 30mm to 100mm, then put them into the rotary kiln, and dry them at 1000°C for 6 hours, then mix the sulfur-containing waste residue with the laterite nickel The mass ratio of the ore is 1:20, the mass ratio of the reducing agent to the laterite nickel ore is 1:18, and the sulfur-containing waste residue, coke, carbon black solid and laterite nickel ore are mixed evenly; the sulfur-containing waste residue is wet-processed nickel sulfide The leaching slag of the concentrate contains 70% elemental sulfur;

[0028] (2) In a direct current electric furnace, after melting the mixture obtained in step (1) at 1400°C for 60 minutes, the upper layer is slag, and the lower layer is nickel-sulfur. The obtained nickel matte product contains 14% nickel, 23% sulfur, and the recovery rate of nickel is 90%. The flue gas formed during the smelting process contains CO ...

Embodiment 3

[0030] (1) The laterite nickel ore is crushed to a particle size of 30mm-100mm, and the particles smaller than 30mm are granulated to 30mm-100mm, and then put into a rotary kiln, dried at 500°C for 2 hours, and then mixed with sulfur-containing waste residue and laterite nickel The mass ratio of the ore is 1:40, the mass ratio of the reducing agent to the laterite nickel ore is 1:16, and the sulfur-containing waste residue, coal, carbon black solid and laterite nickel ore are mixed evenly; the sulfur-containing waste residue is wet-processed nickel sulfide The leaching slag of concentrate, which contains 80% elemental sulfur;

[0031] (2) In an AC electric furnace, after melting the mixture obtained in step (1) at 1200°C for 20 minutes, the upper layer is slag, and the lower layer is nickel-sulfur. The obtained nickel matte product contains 17% nickel, 25% sulfur, and the recovery rate of nickel is 88%. The flue gas formed during the smelting process contains CO and a small a...

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Abstract

The invention provides a method for producing nickel matte from sulfur-containing waste residue and laterite-nickel ore. The method comprises the following steps of: crushing the laterite-nickel ore until the particle size is 30-100mm; drying at 500-1,000 DEG C for 2-6 hours; uniformly mixing the sulfur-containing waste residue, a reducing agent and the laterite-nickel ore, wherein the mass ratio of the sulfur-containing waste residue to laterite-nickel ore is 1:(20-4)), and the mass ratio of the reducing agent to the laterite-nickel ore is 1:(16-20); and smelting the mixture at 1,200-1,400 DEG C for 20-60 minutes to obtain a nickel matte product. Based on electric-furnace smelting, the method provided by the invention makes full use of the characteristic of high sulfur content of industrial waste residue, produces nickel matte by taking the industrial waste residue as a vulcanizing agent and adopting the DC (direct current) electric furnace or AC (alternating current) electric furnace reducing vulcanization smelting technology, and solves the problem of pollution caused by the sulfur-containing waste; and meanwhile, the method in which nickel matte is produced from laterite-nickel ore has the characteristics of obvious environmental benefits and low cost.

Description

technical field [0001] The invention provides a method for jointly producing nickel matte from sulfur-containing waste residue and laterite nickel ore, which belongs to the technical field of nonferrous metal metallurgy. Background technique [0002] There are three common processes for lateritic nickel ore smelting: pyro-method, wet method and combination of pyro-wet method. The wet process can be divided into ammonia leaching and pressure acid leaching according to the different leaching solutions. Among them, the ammonia leaching process is not suitable for the treatment of laterite nickel oxide ore with high copper and cobalt content, and the pressure acid leaching process is generally suitable for treatment. The large-scale production of lateritic nickel oxide ore with low magnesium content faces many environmental problems. The fire-wet combination process mainly includes reduction roasting-atmospheric pressure ammonia leaching, segregation-reduction roasting-separati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B4/06C22B23/02C22B7/04C22C1/02C22C19/03
CPCY02P10/20
Inventor 魏永刚王华王炜廖彬唐瑞祥李磊李博邱在军
Owner KUNMING UNIV OF SCI & TECH