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Special steel ladle draining sand for stainless steel and production process thereof

A technology of drainage sand and stainless steel, which is applied in the direction of manufacturing tools, metal processing equipment, casting melt containers, etc., can solve the problems of low self-opening rate of ladle, low self-opening rate of ladle, economic loss of enterprises, etc., to avoid pure molten steel The effect of poor temperature, fewer times of oxygen blowing and drainage, and reduced labor intensity

Active Publication Date: 2011-04-06
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ladle drainage sand for stainless steel provided by most manufacturers is only slightly modified on the basis of ordinary drainage sand. Pouring and other issues
Under this current situation, when iron and steel enterprises smelt stainless steel, because there is no drainage sand specially designed for stainless steel, the ladle self-opening rate is not high, oxygen is excessively burned, and even continuous casting is interrupted, which has brought huge problems to the enterprise. economic loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A special ladle drainage sand for stainless steel, which is composed of the following substances by weight percentage: 64% of chrome sand (more than 0.21mm particle size > 70%), wherein the Cr in the chrome sand 2 o 3 The mass percentage content of the compound is 42-48%; sea sand (0.5-1.0mm) 19%, Al ball 5%, inner covering sand 8%, potassium feldspar 3%, carbon black 0.4%, medium carbon 0.6%.

[0021] Sieve various qualified raw materials such as chrome sand, selected sea sand, Al balls, inner covering sand, potassium feldspar, carbon black, and medium carbon to the specified particle size, and then measure various raw materials according to the stated ratio. The measured raw materials are placed in designated positions. First, pour all the 4 materials of selected sea sand, Al ball, inner covering sand and potassium feldspar with accurate measurement into the bucket elevator, and pour water into these 4 kinds of materials according to the ratio of adding 2 to 5 kg of ...

Embodiment 2

[0024] A special ladle drainage sand for stainless steel, which is composed of the following substances in weight percentage: 72% of chrome sand (more than 0.21mm particle size > 70%), wherein the Cr in the chrome sand 2 o 3 The mass percentage content of the compound is 42-48%; sea sand (0.5-1.0mm) 13%, Al ball 4%, inner covering sand 5%, potassium feldspar 5%, carbon black 0.6%, medium carbon 0.4%.

[0025] The production technology that the present invention takes is as embodiment one.

Embodiment 3

[0027] A special ladle drainage sand for stainless steel, which is composed of the following substances in weight percentage: 68% of chrome sand (above 0.21mm particle size > 70%), wherein the Cr in the chrome sand 2 o 3 The mass percentage content of the compound is 42-48%; sea sand (0.5-1.0mm) 15%, Al ball 6%, inner covering sand 6%, potassium feldspar 4%, carbon black 0.5%, medium carbon 0.5%.

[0028] The production technology that the present invention takes is as embodiment one.

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Abstract

The invention discloses a special steel ladle draining sand for stainless steel and a production process thereof. The product and the process can effectively improve the self-opening rate of a steel ladle, greatly relieve the labor intensity of workers, reduce oxygen-blast draining times, improve the quality of molten steel and ensure the progressive execution of a continuous casting process. When the stainless steel is produced by using the steel ladle draining sand, the self-opening rate of the steel ladle can reach above 98% so that the purposes of fewer oxygen-blast draining times, high quality of molten steel and progressive execution of the continuous casting process are achieved, and simultaneously, the total steel-making cost of a steel mill is also reduced.

Description

technical field [0001] The invention belongs to the technical field of metal smelting auxiliary materials, in particular to a special ladle drainage sand for stainless steel and a production process thereof. technical background [0002] At present, domestic iron and steel enterprises that smelt stainless steel are relatively limited. Although there are many manufacturers of drainage sand, there are very few ladle drainage sand that can be developed according to the characteristics of stainless steel and its smelting characteristics. In particular, there are very few manufacturers who can design special drainage sand and its unique production process according to the characteristics of stainless steel and its smelting. The ladle drainage sand for stainless steel provided by most manufacturers is only slightly modified on the basis of ordinary drainage sand. Pouring and other issues. Under this current situation, when iron and steel enterprises smelt stainless steel, becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/12B22D41/48
Inventor 李晓阳陈永艳汪国敏张洪满赵博
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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