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A kind of preparation method of high nickel matte oxidized calcine

A technology of nickel matte and calcination, which is applied in the field of metallurgy, can solve the problems of difficulty in obtaining high nickel matte oxidized calcine, failure of normal production, and increased costs, and achieve the effects of avoiding ignition and softening, solving furnace caking problems, and high safety

Active Publication Date: 2018-10-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, during the roasting process of high nickel matte oxidation, serious furnace formation will occur, resulting in the failure of normal production, and it is even more difficult to obtain ideal high nickel matte oxidation calcine.
An Shaoqin disclosed a method of granulating after adding a certain amount of soot in high-nickel matte powder ore in "Nonferrous Metallurgy" No. 4 in 1995. 3 S 2 ) softening point temperature, although the problem of furnace formation can be avoided, but this process needs to granulate the fine ore, which will increase additional costs, and the obtained high nickel matte oxidized calcine still has a residual sulfur content of 0.5%

Method used

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  • A kind of preparation method of high nickel matte oxidized calcine
  • A kind of preparation method of high nickel matte oxidized calcine
  • A kind of preparation method of high nickel matte oxidized calcine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the high matte oxidized calcine in this embodiment includes the following steps: crush the high matte in a crusher to obtain small particles of high matte; finely grind the small particles of high matte in a vibration mill, and grind the finely ground The high nickel matte powder is passed through a 200-mesh sieve; the finely ground high nickel matte is placed in a burning boat, placed in the middle of the tube furnace, and heated at a rate of 5°C / min in a pure oxygen atmosphere. After reaching 520°C, the temperature is kept for 5 hours; In the atmosphere, the temperature is increased to 820°C at a rate of 2°C / min, and the temperature is kept for 5 hours; after the material is cooled with the furnace, a high matte nickel oxide calcine is obtained.

[0031] Such as figure 1 , figure 2 As shown, the finely ground high nickel matte powder has a finer particle size, more sulfur elements and evenly distributed in the high matte nickel, while the copper...

Embodiment 2

[0035] The preparation method of the high matte oxidized calcine in this embodiment includes the following steps: crush the high matte in a crusher to obtain small particles of high matte; finely grind the small particles of high matte in a vibration mill, and grind the finely ground The high nickel matte powder is passed through a 300-mesh sieve; the finely ground high nickel matte is placed in a burning boat, placed in the middle of the tube furnace, heated to 540°C at a rate of 15°C / min in a pure oxygen atmosphere, and then kept for 15 hours; the oxygen content is Under a 50% oxygen atmosphere, the temperature is raised to 850°C at a rate of 3°C / min and the temperature is maintained for 10 hours; after the materials are cooled with the furnace, the high matte nickel oxide calcine is obtained. The obtained high matte oxidized calcine was subjected to inductively coupled plasma (ICP) detection, and the sulfur content of the high matte oxidized calcine was 0.048%.

Embodiment 3

[0037] The preparation method of the high matte oxidized calcine in this embodiment includes the following steps: crush the high matte in a crusher to obtain small particles of high matte; finely grind the small particles of high matte in a vibration mill, and grind the finely ground The high nickel matte powder is passed through a 100-mesh sieve; the finely ground high matte nickel is placed in a burning boat, placed in a muffle furnace, heated to 560°C at a rate of 18°C / min in an air atmosphere, and then kept for 10 hours; The temperature is raised to 870°C at a rate of 5°C / min and the temperature is maintained for 15 hours; after the materials are cooled with the furnace, the high matte nickel oxide calcine is obtained. The obtained high matte oxidized calcine was subjected to inductively coupled plasma (ICP) detection, and the sulfur content of the high matte oxidized calcine was 0.052%.

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Abstract

The invention relates to a preparation method of high-grade matte nickel oxidized calcined sand. The preparation method comprises the following steps that 1, high-grade matte nickel is crushed and finely grinded; 2, low temperature calcination is performed, wherein the high-grade matte nickel obtained after fine grinding is put in a heating device, heating is performed in an oxidizing atmosphere to reach 500.0-560 DEG C for heat preservation; 3, high-temperature calcination and desulfurization are performed, the high-grade matte nickel obtained after low temperature calcination is heated in the oxidizing atmosphere to reach 820.0-1000 DEG C for heat preservation; 4, after the material is cooled with a furnace, the high-grade matte nickel oxidized calcined sand is obtained. By the adoption of the method, the slag clotting problem in the high-grade matte nickel oxidizing and calcining process is effectively solved, the sulfur content of the obtained high-grade matte nickel oxidized calcined sand is 0.1% or below. The method is simple in technological process, strong in operability and high in safety and facilitates industrialization.

Description

Technical field [0001] The invention relates to the field of metallurgy, in particular to a smelting technology of high matte nickel. Background technique [0002] Because nickel has good corrosion resistance, plasticity and magnetism, it has been widely used in metallurgy, battery, military manufacturing, civil machinery manufacturing, and electroplating industry. With the rapid development of society, the country's demand pattern for nickel products has changed. Whether domestically or internationally, the demand for pure nickel is declining significantly, while the demand for other nickel-containing products suitable for different purposes is on the rise. The unitary product structure not only cannot meet the needs of economic development for the types of nickel products, but also affects the development of the nickel industry to a certain extent. [0003] As a metallurgical intermediate product, high matte nickel is mainly composed of nickel trisulfide (Ni 3 S 2 ), chalcocite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B23/02
CPCC22B1/02C22B23/005C22B23/02
Inventor 王志兴席昭郭华军李新海彭文杰胡启阳
Owner CENT SOUTH UNIV
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