Method for comprehensive utilization of laterite nickel ore

A technology of laterite nickel ore and ammonium bisulfate, which is applied in nickel sulfide, process efficiency improvement, magnesium oxide, etc., and can solve problems such as land occupation and ecological environment damage

Active Publication Date: 2012-01-18
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above-mentioned lateritic nickel ore treatment processes only focus on the recovery of nickel with a low content in the ore. Some of them recover iron and cobal...

Method used

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  • Method for comprehensive utilization of laterite nickel ore
  • Method for comprehensive utilization of laterite nickel ore
  • Method for comprehensive utilization of laterite nickel ore

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Experimental program
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Effect test

Embodiment 1

[0033] The composition of the laterite nickel ore used is: NiO 0.93%, SiO 2 40.74%, MgO 21.53%, Fe 2 o 3 18.82%, Al 2 o 3 4.45%, CaO 0.62%, Cr 2 o 3 0.56%, other 0.72%, loss on ignition 11.63%.

[0034] Crush the laterite nickel ore, grind it to a fineness of less than 80 μm, and mix it with ammonium bisulfate at a mass ratio of 1:1.8. The material is roasted at 350° C. for 4 hours at a constant temperature. The ammonia gas and sulfur trioxide produced during the roasting process are absorbed with dilute sulfuric acid, and the obtained ammonium bisulfate solution is evaporated, concentrated, and crystallized to obtain ammonium bisulfate crystals, which are returned for laterite nickel ore roasting. The roasted clinker was dissolved in 3 times the mass of water at 40°C for 90 minutes, filtered to obtain filtrate and filter residue. The filtrate contains Ni 2+ , Fe 3+ , Fe 2+ , Mg 2+ , NH 4+ , SO 4 2- , the main component of the filter residue is silicon dioxide...

Embodiment 2

[0040] The composition of the laterite nickel ore used is: NiO 1.73%, SiO 2 42.57%, MgO 20.31%, Fe 2 o 3 18.66%, CaO0.68%, Cr 2 o 3 0.52%, other 0.86%, loss on ignition 10.8%.

[0041] The laterite nickel ore is crushed and ground to below 80 μm, mixed evenly with ammonium bisulfate at a mass ratio of 1:2.7, and the material is roasted at 500°C for 1 hour at constant temperature. The ammonia gas and sulfur trioxide produced during the roasting process are absorbed with dilute sulfuric acid, and the obtained ammonium bisulfate solution is evaporated, concentrated, and crystallized to obtain ammonium bisulfate crystals, which are returned for laterite nickel ore roasting. The roasted clinker was dissolved in 3 times the mass of water at 90°C for 30 minutes, filtered to obtain filtrate and filter residue. The filtrate contains Ni 2+ , Fe 3+ , Fe 2+ , Mg 2+ , NH 4 + , SO 4 2- , the main component of the filter residue is silicon dioxide, which is directly used as a...

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Abstract

A method for comprehensive utilization of laterite nickel ore comprises the following steps: (1) pulverizing laterite nickel ore, grinding, mixing with ammonium bisulfate, and roasting; (2) dissolving and filtering the roasted clinker to obtain a filtrate, depositing iron by an ihleite method, and depositing iron by a goethite method; (3) performing nickel deposition of the filtrate obtained after iron deposition by sodium sulfide, preparing a nickel sulfide product; (4) performing magnesium deposition of the filtrate obtained after nickel deposition by sodium hydroxide to obtain magnesium hydroxide; (5) washing, drying and calcining magnesium hydroxide to prepare a magnesium oxide product; (6) using the roasted clinker dissolved slag as a microsilica fume product directly, wherein the main component of the slag is silica; (7) calcining ammonium jarosite to obtain an iron oxide product.

Description

technical field [0001] The invention relates to a method for processing laterite nickel ore, in particular to a method for comprehensively utilizing laterite nickel ore Background technique [0002] Laterite nickel ore is a mixture of hydrated iron oxide and hydrated magnesium silicate formed by long-term weathering, leaching, alteration and enrichment of nickel-containing ores. The lateritic nickel deposit can be divided into three layers: the limonite layer, the silicon-magnesium-nickel layer and the transition layer between the two. The chemical composition of lateritic nickel ore varies not only from deposit to deposit, but even in the same deposit, the content of nickel, cobalt, iron, magnesium, etc. also varies with the depth of the deposit. There are mainly two methods of recovery and treatment of laterite nickel ore: fire method and wet method. [0003] The fire method includes reduction smelting to produce ferronickel and reduction vulcanization smelting to produc...

Claims

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Application Information

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IPC IPC(8): C22B23/00C22B1/02C22B3/46C01B33/12C01G53/11C01F5/08
CPCY02P10/20
Inventor 翟玉春王佳东申晓毅辛海霞李洁张杰
Owner NORTHEASTERN UNIV
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