Metallurgical fluxing agent for serpentinite mine serpentinite type stripped waste rock and preparation method thereof

A technology of serpentine and chrysotile is applied in the field of resource utilization of waste rock stripped from chrysotile mines. , the effect of expanding the source and scope, and reducing the occupation of land resources

Active Publication Date: 2021-12-24
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, metallurgical fluxes have exposed many problems in the steelmaking process, such as the release of harmful F elements by fluorite at high temperatures, the high melting point of vanadium clay is not ideal for slag removal, and the continuous slag removal effect of iron-phosphorus fluxes is poor, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037] In this example, the method for preparing metallurgical flux from serpentinite-type stripped waste rock in chrysotile mines is realized through the following steps:

[0038] Step 1: Strip off the waste rock raw material of chrysotile mine serpentinite type (mass percentage composition of main chemical composition is: MgO 39%, SiO 2 39%, CaO 0.5%, Fe 2 o 3 6%, Al 2 o 3 1.0%, H 2 o + 13%) for hand-selection, use a vertical shaft crusher to crush and sieve the serpentinite-type stripping waste rock in the negative pressure workshop with a pressure lower than 5Pa outside, and obtain coarse serpentinite with a particle size of 30mm±5mm Fragments, coarse serpentine fragments are composed of lizardite, talc, and magnetite.

[0039] Step 2: Scrubbing, washing and dedusting the coarse serpentinite fragments of different particle sizes obtained in step 1 to obtain refined serpentinite fragments of different particle sizes for metallurgical flux. Among them, the wastewa...

example 2

[0042] In this example, the method for preparing metallurgical flux from serpentinite-type stripped waste rock in chrysotile mines is realized through the following steps:

[0043] Step 1: Strip off the waste rock raw material of chrysotile mine serpentinite type (mass percentage composition of main chemical composition is: MgO 35%, SiO 2 35%, CaO 3.5%, Fe 2 o 3 10%, Al 2 o 3 1.5%, H 2 o + 15%) for hand selection, use a vertical shaft crusher to crush and sieve the serpentinite-type stripped waste rock in the negative pressure workshop with a pressure lower than 7Pa outside, and obtain coarse serpentinite with a particle size of 5mm±1mm Fragments, coarse serpentine fragments are antigorite, talc, chlorite.

[0044] Step 2: Scrubbing, washing and dedusting the coarse serpentinite fragments of different particle sizes obtained in step 1 to obtain refined serpentinite fragments of different particle sizes for metallurgical flux. Among them, the wastewater precipitated ...

example 3

[0047] In this example, the method for preparing metallurgical flux from serpentinite-type stripped waste rock in chrysotile mines is realized through the following steps:

[0048] Step 1: Strip off the waste rock raw material (mass percentage composition of main chemical composition: MgO 42%, SiO 2 39%, CaO 2%, Fe 2 o 3 4%, Al 2 o 3 0.5%, H 2 o + 12.5%) for manual selection, use a vertical shaft crusher in the negative pressure workshop with a pressure lower than 10Pa outside to crush and screen the serpentinite-type stripped waste rocks to obtain rough serpentinite with a particle size of 80mm±7mm Fragments, coarse serpentine fragments are made of rock fiber serpentine, magnesite, and brucite.

[0049] Step 2: Scrubbing, washing and dedusting the coarse serpentinite fragments of different particle sizes obtained in step 1 to obtain refined serpentinite fragments of different particle sizes for metallurgical flux. Among them, the wastewater precipitated powder and d...

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Abstract

The invention provides a metallurgical fluxing agent for serpentinite mine serpentinite type stripped waste rock and a preparation method thereof. The method comprises the following steps of: performing hand sorting, attribute crushing and screening on a serpentinite mine serpentinite type stripped waste rock raw material to obtain a rough serpentinite fragment; and scrubbing, washing and removing dust to obtain a refined serpentinite fragment serving as the metallurgical fluxing agent, wherein the particle size of the refined serpentinite fragment is 5 to 80mm, and the refined serpentinite fragment comprises the following chemical components in percentage by weight: more than or equal to 35 percent of MgO, more than or equal to 35 percent of SiO2, less than or equal to 1.5 percent of Al2O3 and less than or equal to 0.15 percent of S. By the method, the current situation that the serpentinite mine stripped waste rock is mainly piled up at present can be changed, and the types and supply sources of the metallurgical fluxing agent are expanded; the prepared refined serpentinite fragment metallurgical fluxing agent has the performance of the conventional fluxing agent and also has the advantages of small adding amount, high magnesium content, few harmful ingredients, low environmental pollution and the like; and a prepared building plastering material is safe and environment-friendly and has high fire resistance.

Description

technical field [0001] The invention relates to the technical field of resource utilization of chrysotile mine stripping waste rocks, in particular to a method for preparing metallurgical flux from serpentine-type stripping waste rocks of chrysotile mines, and the metallurgical flux prepared by the method. Background technique [0002] In the mining process of ultrabasic rock-type chrysotile mines, in order to expose and mine ores, the surrounding rock serpentinite around the chrysotile ore body and the non-ore serpentinite in the ore body are stripped and removed to form a chrysotile mine Serpentinite-type exfoliated waste rock. [0003] my country is the largest steel producing country in the world. Benefiting from the domestic demand, my country's steel production has increased year by year in recent years. In order to ensure early slag formation in the steelmaking process, it is necessary to add a certain amount of steelmaking flux, such as fluorite, vanadium, dolomite,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076C04B20/08C04B20/02C04B20/04C04B18/12
CPCC21C7/076C04B20/08C04B20/026C04B20/04C04B18/12Y02P10/20Y02W30/91
Inventor 罗利明彭同江孙红娟唐颂丁文金
Owner SOUTHWEAT UNIV OF SCI & TECH
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