A kind of method of preparing nickel sulfate with nickel sulfide ore

A technology for nickel sulfide ore and nickel sulfate, applied in nickel sulfate and other directions, can solve the problems of long leaching time, low leaching efficiency, and difficulty in removing impurities.

Inactive Publication Date: 2019-06-07
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But at present, pressure leaching has the problems of difficult removal of impurities, long leaching time, and low leaching efficiency.

Method used

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  • A kind of method of preparing nickel sulfate with nickel sulfide ore
  • A kind of method of preparing nickel sulfate with nickel sulfide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Pretreatment

[0033] The nickel sulfide ore is finely ground, 100g of dilute acid (sulfuric acid, sulfuric acid, nitric acid) is added to the ground 100g of nickel sulfide ore, stirred for 1 hour, and then filtered by pressure to obtain pretreated nickel sulfide ore and an aqueous solution. The aqueous solution is concentrated and crystallized. Recovery of magnesium salt. Among them, the fineness of nickel sulfide ore after grinding is 80 μm.

[0034] (2) Oxygen pressure leaching

[0035] In the pretreated nickel sulfide ore, add 100g sulfuric acid (20% sulfuric acid concentration), 10g oxidizer, 1g sulfur binder, 1g calcium sulfate inhibitor and 1g iron oxide seed crystals, mix well and add to the autoclave After the reaction is carried out at 140°C, the solid-liquid separation obtains the nickel sulfate solution and the leaching residue. Wherein, the amount of iron oxide seed crystals added is 5% of the mass of the pretreated nickel sulfide ore, the pressure of the h...

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Abstract

The invention discloses a method for preparing nickel sulfate from nickel sulfide ore. The method includes steps of finely grinding the nickel sulfide ore; adding dilute acid into the nickel sulfide ore and remove impurities; adding sulfuric acid, oxidizing agents, sulfur binding agents, calcium sulfate inhibitors and iron oxide seed crystals into the nickel sulfide ore and uniformly mixing the sulfuric acid, the oxidizing agents, the sulfur binding agents, the calcium sulfate inhibitors, the iron oxide seed crystals and the nickel sulfide ore with one another to obtain mixtures; adding the mixtures into a high-pressure kettle and filling the high-pressure kettle with high-pressure air; carrying out reaction and then separating solid from liquid to obtain nickel sulfate solution and leachresidues. The method has the advantages of short process, high leach efficiency, low cost and environmental protection.

Description

Technical field [0001] The invention relates to the resource utilization field of nickel sulfide ore, in particular to a method for preparing nickel sulfate from nickel sulfide ore. Background technique [0002] The treatment process of nickel sulfide ore can generally be divided into fire method and wet method. The fire treatment process is to use matte smelting to smelt the nickel in the nickel sulfide ore into low-nickel matte, then convert the low-nickel matte into high-nickel matte with a converter, and then produce different nickel products through different refining methods. The main processes include blast furnace smelting of nickel sulfide ore, electric furnace smelting, flash smelting and molten pool smelting. The wet treatment process generally refers to the process of extracting nickel by leaching into the solution. The main processes include sulfuric roasting leaching, atmospheric ammonia leaching, pressure ammonia leaching, oxygen pressure leaching and chlorination...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/10
CPCC01G53/10
Inventor 谭宏斌王久维周旭马小玲杨陆海王进王军霞王玉甫陈建新张斌李文海
Owner SOUTHWEAT UNIV OF SCI & TECH
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