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Process for co-production of nickel pig iron and rock wool products by using laterite-nickel ore

A technology of laterite nickel ore and cotton products, which is applied in the manufacture of tools, glass manufacturing equipment, etc., can solve the problems of large changes in slag composition, different slag phase structures, and failure to meet the requirements of rock wool composition, and reduce smelting energy. Consumption, production cost reduction, good stability effect

Inactive Publication Date: 2014-08-27
SHANDONG WEIYE ENERGY SAVING NEW MATERIALS COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to use the slag produced by the production of laterite nickel ore to turn waste into treasure is a major problem in the industrial field; and there is no report in the prior art that the slag produced while preparing nickel pig iron is used to prepare rock wool; and , because the original composition of nickel ore is different, the slag phase structure used is also different, resulting in a large change in the composition of the slag, and it cannot meet the requirements of the composition required for the production of rock wool

Method used

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  • Process for co-production of nickel pig iron and rock wool products by using laterite-nickel ore
  • Process for co-production of nickel pig iron and rock wool products by using laterite-nickel ore
  • Process for co-production of nickel pig iron and rock wool products by using laterite-nickel ore

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Embodiment 1

[0038] A process for co-producing nickel pig iron and rock wool products using laterite nickel ore, the rock wool products being rock wool boards, the process includes the following steps:

[0039] a. Use laterite nickel ore calcined sand as the main raw material, add a mixture of quicklime and limestone before sintering, add coke in front of the submerged arc furnace, and smelt through the submerged arc furnace, the ratio of parts by weight of laterite nickel ore, quicklime, limestone and coke 90:5:10:5, 60 tons of nickel pig iron were produced, and 330 tons of hot melt were produced at the same time;

[0040] b. Screen out a hot melt with a temperature of 1550°C and an acidity coefficient of 1.7, about 130 tons;

[0041] c. Inject the hot melt screened in step b into the heat preservation tank and then inject it into the heat preservation furnace, and keep the temperature in the heat preservation furnace at 1500°C;

[0042] d. Guide the hot melt in the holding furnace to th...

Embodiment 2

[0049] A process for co-producing nickel pig iron and rock wool products using laterite nickel ore, the rock wool product being granular cotton, the process comprises the following steps:

[0050] a. Use laterite nickel ore sinter as the main raw material, add quicklime before sintering, add coke before the submerged arc furnace, and smelt through the submerged arc furnace. The weight ratio of laterite nickel ore, quicklime and coke is 93:2:5 , produced 100 tons of nickel pig iron, and produced 600 tons of hot melt at the same time;

[0051] b. Screen out a hot melt with a temperature of 1530°C and an acidity coefficient of 1.7, about 310 tons;

[0052] c. Inject the hot melt screened out in step b into the heat preservation tank and then pull it into the heat preservation furnace. The temperature in the heat preservation furnace is kept at 1450 ° C. Both the heat preservation tank and the heat preservation furnace are filled with heat preservation agent;

[0053] d. Guide th...

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Abstract

The invention relates to a process for co-production of nickel pig iron and rock wool products by using laterite-nickel ore. The process comprises the following steps: by taking laterite-nickel ore as a primary material, preparing nickel pig iron and hot melt by smelting of a submerged arc furnace; screening out the hot melt of which the temperature is 1450-1580 DEG C and the acidity coefficient is 1.6-1.9; injecting the screened hot melt into a holding furnace or injecting into an insulting can to inject into the holding furnace in a roping manner; keeping the temperature inside the holding furnace at 1400-1500 DEG C; guiding the hot melt in the holding furnace into a four-roll centrifugal machine by virtue of a controllable head piece and a diversion trench; preparing the rock wool products by a rock wool product production process. Co-production of the nickel pig iron and the rock wool products is achieved by the preparation process, energy consumption in the production process of the rock wool products just is 1 / 4 of that of the traditional rock wool product production process when the energy consumption for smelting the nickel pig iron is greatly reduced, no exhaust gas is discharged, and the production cost of the rock wool products is greatly reduced.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and in particular relates to a process for co-producing nickel pig iron and rock wool products by using laterite nickel ore. Background technique [0002] Traditional rock wool uses coke as the main fuel and basalt as the main raw material. It is usually melted in a cupola furnace. After melting at a high temperature, it is prepared by a centrifuge. In order to reduce the viscosity of the melt, a certain amount of dolomite and massive blast furnace cooling slag are often added to the ingredients. In the smelting process, in order to reduce the consumption of coke, it is necessary to use heating air supply, oxygen-enriched air supply and other means. However, ores such as basalt are restricted by the place of production, and long-distance transportation will increase costs, and the rock wool industry cannot be widely developed. [0003] Laterite nickel ore uses a submerged arc furnace to produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B11/10C03B37/005
CPCC03B37/005C21B11/10
Inventor 张志民花建华
Owner SHANDONG WEIYE ENERGY SAVING NEW MATERIALS COMPANY
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