Pyrogenic pretreatment method for low-grade laterite nickel mine

A laterite nickel ore, low-grade technology, applied in the field of beneficiation and smelting, can solve the problems of low nickel content in nickel pig iron, restricted development and utilization, large equipment investment, etc., achieve high grade and recovery rate, improve comprehensive utilization rate, and equipment investment. effect of province

Inactive Publication Date: 2009-02-18
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the extremely complex properties of lateritic nickel ore, some key production technologies have not yet been resolved. In addition, the wet process has large equipment investment, high equipment requirements, high pressure, and high acid consumption, which affects the raw ore grade an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Under the conditions of solid sulfur at a vulcanization temperature of 400°C:

[0026] (1) The chemical composition of ferrous laterite nickel ore is as follows: Ni1.0%, MgO13.33%, TFe18.0%, Co0.041%, Al 2 o 3 9.44%, SiO 2 23.57%.

[0027] (2) Crushing the iron low-grade lateritic nickel ore to 10mm. According to route one: put it and solid sulfur in the same heating container (vulcanization container) for heating and vulcanization pretreatment.

[0028] In the vulcanization pretreatment process, the addition of vulcanization agent is 20% of the low-grade laterite nickel ore in terms of elemental sulfur by weight; the vulcanization pretreatment temperature is controlled at 400±2°C; the vulcanization pretreatment time is 300 minutes, and iron Heating sulfidation pretreatment of laterite nickel ore.

[0029] The lateritic nickel ore pretreated by pyrosulfurization, when the grinding fineness is -0.074mm, accounting for 90%, undergoes one roughing, four ...

Embodiment 2

[0044] Embodiment 2: Under the conditions of solid iron sulfide at a vulcanization temperature of 1200°C:

[0045] (1) The chemical composition of ferrous laterite nickel ore is as follows: Ni1.0%, MgO13.33%, TFe18.0%, Co0.041%, Al 2 o 39.44%, SiO 2 23.57%.

[0046] (2) Crushing the iron low-grade lateritic nickel ore to 10mm. According to route two: place it and solid iron sulfide in different heating containers and heat them separately, and then add them into the same vulcanization container with a feeder for vulcanization pretreatment.

[0047] In the vulcanization pretreatment process, the addition of vulcanization agent is 10% of the low-grade laterite nickel ore in terms of elemental sulfur by weight; the vulcanization pretreatment temperature is controlled at 1200±2°C; the vulcanization pretreatment time is 30 minutes, and the iron Heating sulfidation pretreatment of laterite nickel ore.

[0048] The lateritic nickel ore pretreated by pyrosulfurization, when the gr...

Embodiment 3

[0064] Embodiment Three: Under the conditions of solid sodium sulfide at a vulcanization temperature of 800°C:

[0065] (1) The chemical composition of ferrous laterite nickel ore is as follows: Ni1.0%, MgO13.33%, TFe18.0%, Co0.041%, Al 2 o 3 9.44%, SiO 2 23.57%.

[0066] (2) Crushing the iron low-grade laterite nickel ore to 2mm. According to route one: put it and solid sodium sulfide in the same heating container (curing container) for heating and vulcanization pretreatment.

[0067] In the vulcanization pretreatment process, the amount of vulcanization agent added is 18% of the low-grade laterite nickel ore in terms of elemental sulfur by weight; the vulcanization pretreatment temperature is controlled at 800±2°C; the vulcanization pretreatment time is 80 minutes, and the iron Heating sulfidation pretreatment of laterite nickel ore.

[0068] The lateritic nickel ore pretreated by pyrosulfurization, when the grinding fineness is -0.074mm, accounting for 90%, undergoes o...

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Abstract

The invention relates to a fire pre-processing method for a low-grade lateritic nickel ore which belongs to the field of nonferrous metal. The method includes following steps : the low-tenor lateritic nickel ore mine is cracked; vulcanization pre-processing is carried out; a metal sulfide is generated; the ore concentrate and the tailing of the nickel purite can be obtained through carrying out one time roughing, four time choiceness and three time scavenging on the preprocessed lateritic nickel ore and returning the middling ores in sequence; under a magnetic field intensity of 6000 to 10000 oersted, one time open roughing and three time open choiceness are carried out on the flotation tailing; a magnetic product is iron ore concentrate; the rest products are combined into the total tailing. The technology of the invention has the characteristics of high material suitability, short flow, good vulcanization effect, device investment saving, low production cost, and the like, thus leading the subsequence beneficiation techniques to be greatly simplified and being capable of producing the mixed ore concentrate of nickel and cobalt, the iron ore concentrate and the tailing as well as obtaining a higher metal ore concentrate grade and a high recycling rate.

Description

technical field [0001] The invention belongs to the field of beneficiation and smelting, and relates to a method for pyrosulfurization pretreatment of complex and refractory low-grade laterite nickel ore. The low-grade laterite nickel ore pretreated by this method is then enriched and comprehensively recovered with valuable metals by conventional mineral processing technology . Background technique [0002] The world's currently proven nickel resources are about 160 million tons, of which 30% are sulfide ores, 70% are laterite nickel ores, and about 70% of nickel metal comes from sulfide ores. The mineral composition of low-grade laterite nickel ore is complex and changeable. According to the geological origin of laterite nickel ore, the ore layer is divided into limonite layer, transition layer, and humus layer from top to bottom. From top to bottom, the iron content gradually becomes lower, and the calcium, magnesium and nickel content gradually become higher. Due to the...

Claims

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Application Information

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IPC IPC(8): C22B23/02C22B1/00B03B7/00
Inventor 王吉坤董英李松春杨大锦张宏耀阎江峰
Owner KUNMING METALLURGY INST
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