A comprehensive utilization method of laterite nickel ore smelting slag
A technology of laterite nickel ore and smelting slag, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., to achieve the effect of enhancing liquidity and realizing comprehensive utilization of large-scale resources
Active Publication Date: 2020-05-15
CITIC HEAVY INDUSTRIES CO LTD +1
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Problems solved by technology
[0004] The present invention aims to provide a comprehensive utilization method of laterite nickel ore smelting slag to solve the resource utilization problem of large-scale ferronickel smelting slag
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Embodiment Construction
[0021] Such as figure 1 Shown, a kind of comprehensive utilization method of laterite nickel ore smelting slag of the present invention comprises the following steps:
[0022] 1) First, the water-quenched slag in the laterite nickel ore smelting slag is piled indoors or under the canopy for 12 hours. The particle size of the water-quenched slag is usually 0-50mm, and the initial moisture content is about 14%. After standing for 12 hours, the moisture content of water-quenched slag can be reduced to below 5%. Then, the water-quenched slag with a moisture content below 5% is transported to the first screening machine through a belt conveyor or other conveying equipment. The first screening machine is a single-layer single-axis vibrating screen, and the water-quenched slag is screened by the first screening machine The first granular material with a particle diameter ≥ 10 mm and the second granular material with a particle diameter < 10 mm.
[0023] 2) Send the first granular m...
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Abstract
The invention relates to the field of industrial solid waste comprehensive utilization, in particular to a comprehensive utilizing method for red soil nickel mineral smelting slag. Water-quenched slagis dried till the water content is not larger than 1%, a winnowing mode is adopted for separating mineral fiber from particles; air cooling slag obtained after coarse crushing, crude slag in the water-quenched slag and fine slag in the dried water-quenched slag are mixed according to the certain ratio so as to increase a crushing value index; secondly, the mixed materials are supplied into a crushed shaping machine, a centrifugal breaking principle is utilized for further breaking material granularity, meanwhile, the material particle contour is corrected, the contour is made to be more regular so as to enhance the flowability; finally, a powder concentrator is used for separating out powdered materials generated in the crushed shaping process, qualified slag particles are obtained to beused as concrete fine aggregate, mineral fiber and powder are adopted as byproducts for use, and therefore large-scale resource comprehensive utilization of red soil nickel mineral smelting slag is achieved.
Description
technical field [0001] The invention relates to the field of comprehensive utilization of industrial solid waste, in particular to a method for comprehensive utilization of laterite nickel ore smelting slag. Background technique [0002] my country is a major producer of ferronickel. Lateritic nickel ore smelting technology is the mainstream ferronickel production process developed in recent years. It has the advantages of large production capacity, short process and simple operation. During the smelting process, the gangue, which accounts for 80% of the total raw ore, is melted at high temperature and discharged as smelting slag. Its smelting slag is mainly water-quenched slag, and a small part of furnace bottom slag is air-cooled slag. The smelting slag of lateritic nickel ore has not been utilized on a large scale since it was produced, and is basically in a state of stockpiling. This situation not only wastes resources and occupies land, but also brings serious environm...
Claims
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IPC IPC(8): C04B20/02C04B18/14
CPCC04B18/144C04B20/02C04B20/026Y02W30/91
Inventor 李葆生王新建张晗王家全董节功张萌
Owner CITIC HEAVY INDUSTRIES CO LTD