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High-quality chromium drainage sand for steel ladle

A high-grade, drainage sand technology, applied in the field of metallurgy, can solve the problems of low automatic pouring rate of multiple refined steel ladles, high price, excessive oxygen burning, etc., to improve automatic pouring rate and corrosion resistance of molten steel Strong, good effect of high temperature sintering performance

Active Publication Date: 2016-05-04
RONGYUAN METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-grade chromium drainage sand for ladles. The high-grade chromium drainage sand for ladles should solve the problems of low automatic pouring rate and excessive oxygen burning in multiple refined steel ladles in the existing mechanism. , expensive and energy-intensive technical issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A high-grade chromium drainage sand for ladle: 68~80wt% chrome ore, 10~20wt% sea sand, 0~5wt% quartz sand, 5~10wt% high alumina ball, 0~0.5% chrome green 0.1~1.5wt % graphite and 0.1~0.8wt% carbon black are mixed and stirred.

[0051] The low-cost ladle drainage sand prepared in this example has a statistical number of 1058 furnaces; the number of pouring furnaces is 10564; the automatic pouring rate is 99.8%.

Embodiment 2

[0053] A high-grade chromium drainage sand for ladle: 75~85wt% chrome ore, 5~10wt% sea sand, 5~10wt% quartz sand, 3~8wt% high alumina ball, 0.3~0.8% chrome green, 0.6~2.0 It is made by mixing and stirring wt% graphite and 0.2~0.8wt% carbon black.

[0054] The high-grade chromium drainage sand for ladles prepared in this example has a count of 1096 furnaces; 1093 furnaces have started pouring; the automatic pouring rate has been 99.7%.

Embodiment 3

[0056] A high-grade chromium drainage sand for ladle: 85~94wt% chrome ore, 2~10wt% sea sand, 1~5wt% quartz sand, 1~5wt% high alumina ball, 0.1~0.6% chrome green, 0.5~1.0 It is made by mixing and stirring wt% graphite and 0.1~0.5wt% carbon black.

[0057] The high-grade chromium drainage sand for the ladle prepared in this example has a statistical number of 995 furnaces; a number of 993 furnaces for pouring; and an automatic pouring rate of 99.6%.

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Abstract

The invention provides high-quality chromium drainage sand for a steel ladle, which is composed of 68-94wt% of chromium ore sand, 5-30wt% of sea sand, 0-15wt% of quartz sand, 1-12wt% of high-aluminum ball, 0-2.5wt% of graphite, 0.1-1wt% of carbon black and 0-1wt% of chrome green. The high-quality chromium drainage sand has the characteristics of strong molten steel erosion resistance, good molten steel penetration resistance, good high-temperature sintering performance, uniform particle size distribution and good fluidity, and can effectively improve the automatic pouring rate of a multiple-refining steel ladle. By using the product provided by the invention, the automatic pouring rate of the steel ladle can reach more than or equal to 99%, so as to guarantee the quality of multiple refined molten steel and safe and continuous production of a continuous casting process.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a drainage sand, in particular to a ladle high-grade chromium drainage sand. Background technique [0002] With the increase of high-quality steel types in China, the molten steel in the ladle is required to undergo multiple refining, so that the refining time of molten steel in the ladle is getting longer and higher, and the refining temperature is getting higher and higher. In order to ensure the quality of billets and the safe and continuous production of continuous casting workshops, higher requirements are put forward for the drainage sand in the ladle. At present, there are many domestic manufacturers of drainage sand, but there are very few ladle drainage sand designed for multiple refining steel in steel mills with high pouring rate. [0003] At present, the drainage sand provided by domestic drainage sand manufacturers is generally ordinary chrome drainage sand or silicon drainag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/42B22D41/44
CPCB22D41/44C04B35/42C04B35/66C04B2235/3217C04B2235/3241C04B2235/3418C04B2235/424C04B2235/425
Inventor 贺俊海沈战驹沈寅
Owner RONGYUAN METALLURGICAL MATERIALS CO LTD
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