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Method for improving the metallization rate of metallurgical slag pellets

A metallization rate, metallurgical slag technology, applied in the field of metallurgy, can solve the problems of low production efficiency, low iron content, too long time, etc., to achieve the effects of improving metallization rate, promoting reduction, and increasing melting point

Active Publication Date: 2016-10-19
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the material fed into the furnace is powder, and the phenomenon of "ringing" cannot be completely avoided in the reduction furnace, and the calcination time is 2.0 to 20 hours, which is too long and the production efficiency is low. In addition, the final product contains more than 86wt% magnetic product with low iron content

Method used

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  • Method for improving the metallization rate of metallurgical slag pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Composition of copper smelting slag beneficiation tailings: iron content 38.75wt%, Cu content 0.26wt%, lead content 0.52wt%, zinc content 2.55wt%;

[0055] First, crush carbon black, anthracite, copper smelting slag beneficiation tailings, quicklime, slaked lime, magnesia and kaolin to a particle size of no more than 0.074mm, and then mix the mixture of carbon black, molasses and slaked lime in a pelletizer to make pellets , to obtain carbon-containing pellets with carbon black as the core, and then mix the carbon-containing pellets with copper smelting slag beneficiation tailings, anthracite, quicklime, molasses and slaked lime mixture in a pelletizer to obtain pellets containing Metallurgical slag pellets with carbon pellets as the core. Among them, the mass ratio of copper smelting slag beneficiation tailings: anthracite: quicklime: molasses: slaked lime in the smelting slag pellets is 100:22:10:5:3, and then it will contain magnesia The mixture of kaolin and metallu...

Embodiment 2

[0057] Composition of copper smelting slag beneficiation tailings: iron content 43.21wt%, Cu content 0.16wt%, lead content 0.26wt%, zinc content 1.09wt%;

[0058] Firstly crush coke powder, anthracite, copper smelting slag beneficiation tailings, quicklime, sodium carbonate, bentonite, magnesite and mullite to a particle size of not more than 0.074mm, and then mix the coke powder with bentonite and liquid binder Mix and pelletize in the pelletizing machine to obtain carbon-containing pellets with coke powder as the core, and then mix the carbon-containing pellets with copper smelting slag ore dressing tailings, anthracite, quicklime and sodium carbonate mixture, bentonite and liquid binder The mixture is mixed and pelletized in the pelletizer, so that the metallurgical slag pellets with carbon-containing pellets as the core can be obtained, among which, the copper smelting slag beneficiation tailings in the smelting slag pellets: anthracite: quicklime: sodium carbonate: bentoni...

Embodiment 3

[0060] Composition of nickel smelting slag: iron content 42.35%, Ni content 0.19%;

[0061]First crush graphite powder, coke powder, nickel smelting slag, sodium carbonate, bentonite and aluminum oxide to a particle size not greater than 0.074 mm, then mix graphite powder, bentonite and liquid binder in a pelletizer pelletizing to obtain carbon-containing pellets with graphite powder as the core, and then mix the carbon-containing pellets with copper smelting slag, beneficiation tailings, coke powder, sodium carbonate, bentonite and liquid binder mixture in a pelletizer Balls, so that the metallurgical slag pellets with carbon-containing pellets as the core can be obtained, wherein, nickel smelting slag: coke powder: sodium sulfate: bentonite: liquid binder = 100: 25: 6: 5: 10, and then three Aluminum oxide and metallurgical slag pellets are wrapped to form a high temperature resistant layer on the surface of the metallurgical slag pellets, thereby obtaining metallurgical slag...

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Abstract

The invention discloses a method for improving the metallization rate of a metallurgical slag pellet. The method comprises the following steps: (1) mixing a carbonic substance with an adhesive for pelletizing for the first time to obtain a carbonic pellet; (2) mixing the carbonic pellet with a mixture containing metallurgical slag, a reducing agent, the adhesive and an additive for pelletizing for the second time to obtain the metallurgical slag pellet with the carbonic pellet serving as a core; (3) wrapping the metallurgical slag pellet to form a high-temperature-resistant layer on the surface of the metallurgical slag pellet; and (4) roasting the metallurgical slag pellet with the high-temperature-resistant layer to obtain a metalized pellet. According to the method, the metallization rate of the metallurgical slag pellet can be remarkably improved, so that a product with higher iron level and higher recovery rate is obtained favorably in the subsequent treatment process.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for increasing the metallization rate of metallurgical slag pellets. Background technique [0002] In the prior art, with the development of society and economy, the production and consumption of non-ferrous metals are also increasing day by day. Along with the smelting process of non-ferrous metal products, a large amount of smelting slag and tailings are also discharged. Most of these smelting slags are high-temperature molten slags obtained by pyrometallurgy. In order to recover the valuable elements in them, some smelting slags are quenched in water to room temperature and then crushed with chemicals for flotation to finally obtain smelting furnace slag ore dressing tailings. . These smelting slags and beneficiation tailings generally contain 35-55 wt% iron, mainly in fayalite phase. Due to the difficulty in utilizing smelting slag and tailings, a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/248C22B1/242C22B1/02
CPCC22B1/02C22B1/242C22B1/248
Inventor 吴道洪王欣曹志成王敏任中山薛逊
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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