Laterite powder briquette and preparation method and reutilization method thereof

A technology of laterite ore and powder pressing, applied in the field of nickel industry, can solve the problems of water body, environmental pollution, serious secondary pollution, slow development, etc., and achieve the effect of reducing land occupation, avoiding environmental pollution and strong adhesion

Inactive Publication Date: 2018-07-17
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, although laterite ore smelting fume treatment technologies have emerged in recent years, their development has been slow.
At present, the traditional treatment method is to return the smoke and dust to the sintering ingredients for direct recycling, but the secondary pollution is serious; or send it out for landfill treatment, causing water and environmental pollution, which is strictly prohibited by the environmental protection department

Method used

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  • Laterite powder briquette and preparation method and reutilization method thereof

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preparation example Construction

[0034] A kind of preparation method of laterite mineral powder briquette, this method comprises the following steps:

[0035] 1) Ingredients

[0036] Weigh the laterite mineral powder, dedusting ash and adhesive according to the required proportion;

[0037] 2) mix well

[0038] Add the ingredients into the mixer, add water and mix them evenly through the mixer to obtain the mixture. In this embodiment, the water content of the mixture is ensured by configuring the magnesium chloride aqueous solution, and the overall water content is controlled between 8-11%. Adding a certain concentration of magnesium chloride aqueous solution, one of the purposes is to balance the overall moisture content of the mixture, and the second purpose is the hydration reaction between magnesium oxide and magnesium chloride, which will have a strong adhesive force. Adding an inorganic composite toughening agent, the adhesive Knots are stronger and strengthened into blocks.

[0039] 3) Briquetting ...

Embodiment 1

[0044] According to the percentage by weight, the added materials are prepared in the following proportions: 50% of laterite mineral powder, 50% of dedusting ash; and 2.5% of binder.

[0045] Add the above-mentioned ingredients into the mixer, add water and mix well, control the water content to 9%, rotate for 10 minutes, then add it to the press, set the pressure of the press to 5 tons, start the press to briquette, and after the briquette is demoulded, it will be in the natural Place it under the same conditions for more than 24 hours to obtain a cold-set briquette. Measure the number of unbroken drops from 0.5 meters at room temperature, as well as the compressive strength; after the briquette is dried, put it into a furnace under a reducing atmosphere at 1100°C, keep the temperature constant for 40 minutes, take it out and measure its strength.

Embodiment 2

[0047] According to the percentage by weight, the added materials are prepared in the following ratio: 50% of laterite mineral powder, 50% of dedusting ash; and 3% of binder.

[0048] Add the above-mentioned ingredients into the mixer, add water and mix well, control the water content to 9%, rotate for 10 minutes, then add it to the press, set the pressure of the press to 5 tons, start the press to briquette, and after the briquette is demoulded, it will be in the natural Place it under the same conditions for more than 24 hours to obtain a cold-set briquette. Measure the 0.5-meter drop and compressive strength at room temperature; put the briquette into a furnace under a reducing atmosphere at 1100°C after drying, keep the temperature constant for 40 minutes, take it out and measure its strength.

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Abstract

The invention discloses a laterite powder briquette and a preparation method and reutilization method thereof. The laterite powder briquette is a high cold-bonding strength raw material which is quitesuitable for being transferred and used for rotary kiln and electric furnace smelting. Meanwhile, according to the preparation method of the laterite powder briquette, mineral powder produced by laterite smelting can be treated in simplest and cost-optimal modes, and environmental protection and comprehensive utilization of resources can be facilitated through reutilization of the laterite powder. The laterite powder briquette comprises, by weight, 20%-50% of the laterite powder, 50%-80% of fly ash, 3%-4% of a binder and 8%-11% of moisture.

Description

technical field [0001] The invention relates to the technical field of nickel industry, in particular to a laterite ore powder briquette, a preparation method thereof, and a secondary utilization method. Background technique [0002] At present, the proven nickel industrial reserves on land are about 80 million tons, of which nickel sulfide ore accounts for about 20%, laterite nickel ore accounts for about 75%, and nickel silicate ore accounts for 5%. With the gradual reduction of nickel sulfide ore and high-grade laterite ore, the development and utilization of low-grade laterite nickel ore has become very important. The main advantages of the development and utilization of laterite nickel ore are: rich resources, low exploration costs, extremely low mining costs, and gradually mature dressing and smelting processes. Many domestic enterprises import and use laterite ore. For example, Jinguang Group uses Indonesian laterite ore. However, the degree of differentiation of lum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243
CPCC22B1/2406C22B1/243
Inventor 张明远万新石敬轩
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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