High-aluminum slag system for smelting of nickel flash furnace and application of high-aluminum slag system

A flash furnace and high-alumina slag technology is applied in the field of high-alumina slag to achieve the effect of reducing the viscosity of the slag and reducing the melting temperature of the slag

Active Publication Date: 2020-11-06
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems existing in the existing smelting process, the object of the present invention is to provide a high-alumina slag system and its application for nickel flash furnace smelting, so as to improve the viscous flow characteristics of slag, reduce the melting temperature, and reduce the nickel flash rate. Energy consumption during rapid smelting

Method used

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  • High-aluminum slag system for smelting of nickel flash furnace and application of high-aluminum slag system
  • High-aluminum slag system for smelting of nickel flash furnace and application of high-aluminum slag system
  • High-aluminum slag system for smelting of nickel flash furnace and application of high-aluminum slag system

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Embodiment

[0023] Table 1 is the composition table of the main components of the nickel flash furnace smelting slag system. The substances in the table are expressed in mass percentages. Sample No. 1 in the table is the composition of the existing nickel flash furnace smelting slag system. Examples 1 to 3 of the present invention are composed of high-alumina slag.

[0024] Table 1

[0025]

[0026] Use chemically pure reagents to mix slag according to Table 1, use the Brookfield DV-II+ high temperature melt physical property tester, and use the rotation method to conduct viscosity-melting temperature test experiments on the slag system in Table 1. The results are as follows figure 1 and figure 2 shown. During the viscosity measurement, about 150 g of the sample was placed in the Pt crucible. The sample was heated to 1500°C at a speed of 5°C / min, and kept at a temperature of about 240min to fully react. The spindle is slowly injected into the fluid slag at a low rotational speed. ...

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Abstract

The invention belongs to the technical field of smelting of nickel flash furnaces, and discloses a high-aluminum slag system for smelting of a nickel flash furnace and application of the high-aluminumslag system. The high-aluminum slag system comprises, by mass, 45-52% of Fe, 6.5-12% of MgO, 18-24% of SiO2, 2.0-2.0% of CaO, 9.5-15.5% of Al2O3 and 1.5-5.5% of MnO. According to the high-aluminum slag system, smelting of the nickel flash furnace is smoothly conducted, and the good viscous flow characteristic and the slag-matte separation capacity of slag are kept while the melting temperature ofthe slag is decreased.

Description

technical field [0001] The invention belongs to the technical field of nickel flash furnace smelting, and mainly relates to a high-alumina slag system used for nickel flash furnace smelting and its application. Background technique [0002] A suitable smelting slag system is one of the basic conditions for realizing the stable and smooth operation of nickel flash furnace smelting. The important raw material for nickel flash furnace smelting is nickel sulfide ore, but in recent years, with the gradual consumption of high-grade nickel sulfide ore with high nickel content and low impurity content, nickel ore with high magnesium content has gradually become a possible nickel smelting raw material. The high content of magnesium oxide causes changes in the melting point and viscosity of the slag, which makes the nickel flash furnace smelting process deviate from its normal optimum control point. At present, the MgO content in flash furnaces used by enterprises to smelt nickel ore...

Claims

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Application Information

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IPC IPC(8): C22B23/02
CPCC22B23/02
Inventor 李小明张馨艺庞焯刚臧旭媛邢相栋吴育庆王伟安阮锦榜
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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