Crystallizer casting powder for austenite antibacterial stainless steel

A technology of antibacterial stainless steel and mold slag, which is applied in the field of steelmaking auxiliary materials to achieve good control of heat transfer effects, satisfy shrinkage characteristics, and improve the quality of cast slabs

Active Publication Date: 2014-05-14
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, among domestic mold powder manufacturers, there is no mold powder with stable performance that can be well adapted to the production of Austenitic antibacterial stainless steel

Method used

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  • Crystallizer casting powder for austenite antibacterial stainless steel
  • Crystallizer casting powder for austenite antibacterial stainless steel
  • Crystallizer casting powder for austenite antibacterial stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] For the continuous casting mold powder produced by Austenitic antibacterial stainless steel in a certain factory, the raw material formula is: 2 parts of glass powder, 50 parts of wollastonite, 2.5 parts of carbon black, 1 part of graphite, 6 parts of fluorite, 6.4 parts of sodium carbonate 6.5 parts of cement clinker, 6.4 parts of calcite, 4 parts of sodium fluoride, 3 parts of bauxite, 3.7 parts of lightly burned magnesia, 7 parts of albite, and 1.2 parts of dextrin.

[0021] The mold powder was prepared by conventional technology, and the test results of its main physical and chemical indicators are as follows: CaO: 36.3%, SiO 2 : 34%, MgO: 4.7%, Al 2 o 3 : 5.2%, Na 2 O: 6.3%, C: 3%, F - : 7.4%, balance: impurity.

[0022] The alkalinity of the mold slag for the continuous casting mold for the Austenitic antibacterial stainless steel is CaO / SiO 2 It is 1.07, the melting point is 1161°C, the viscosity at 1300°C is 0.13Pa.s, and the melting rate is 38s.

Embodiment 2

[0024] For the continuous casting mold powder produced by Austenitic antibacterial stainless steel in a factory, the raw material formula is: 2.5 parts of glass powder, 48 parts of wollastonite, 2.5 parts of carbon black, 1 part of graphite, 5.5 parts of fluorite, 7.2 parts of sodium carbonate 6.3 parts of cement clinker, 5.4 parts of calcite, 4.4 parts of sodium fluoride, 4.1 parts of bauxite, 4.7 parts of calcined magnesia, 7.2 parts of albite feldspar, and 1.2 parts of vegetable starch.

[0025] The mold powder was prepared by conventional technology, and the test results of its main physical and chemical indicators are as follows: CaO: 36.3%, SiO 2 : 33%, MgO: 5.1%, Al 2 o 3 : 4.6%, Na 2 O: 7.3, C: 3.2%, F - : 6.5%, balance: impurity.

[0026] The alkalinity of the mold slag for the continuous casting mold for the Austenitic antibacterial stainless steel is CaO / SiO 2 It is 1.1, the melting point is 1190°C, the viscosity at 1300°C is 0.18Pa.s, and the melting rate is ...

Embodiment 3

[0028] For the continuous casting mold powder produced by austenitic antibacterial stainless steel in a certain factory, the raw material formula is: 2 parts of glass powder, 45 parts of wollastonite, 2.5 parts of carbon black, 1 part of graphite, 8 parts of fluorite, and 9 parts of sodium carbonate 5 parts of cement clinker, 5 parts of calcite, 3.5 parts of sodium fluoride, 2.5 parts of bauxite, 2.5 parts of light burnt magnesia, 8 parts of albite, 0.6 part of dextrin, and 0.6 part of vegetable starch.

[0029] The mold powder was prepared by conventional technology, and the test results of its main physical and chemical indicators are as follows: CaO: 34%, SiO 2 : 33%, MgO: 2%, Al 2 o 3 : 3%, Na 2 O: 12%, C: 4.5%, F - : 7.9%, balance: impurity.

[0030] The alkalinity of the mold slag for the continuous casting mold for the Austenitic antibacterial stainless steel is CaO / SiO 2 It is 1.03, the melting point is 1170°C, the viscosity at 1300°C is 0.13Pa.s, and the melting...

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Abstract

The invention discloses continuous casting crystallizer casting powder for austenite antibacterial stainless steel. The alkalinity of the continuous casting crystallizer casting powder ranges from 1.0 to 1.1, and the continuous casting crystallizer casting powder can achieve a very good heat transfer control effect and meet the requirement for shrinkage characters of the austenite antibacterial stainless steel. The viscosity is set as 0.10 Pa*s-0.18 Pa*s at the temperature of 1300 DEG C, so that the casting powder flows in gaps between blank shells and a crystallizer copper plate more evenly, casting blanks are lubricated, the requirement for the consumption of the crystallizer casting powder is met, and the viscosity is mainly controlled Al2O3, MgO and F-. The melting point ranges from 1130 DEGC to 1190 DEG C, heat resistance of the casting powder is increased, the heat transfer uniformity index of the crystallizer casting powder is increased, and cracks are difficult to produce. Raw materials of the continuous casting crystallizer casting powder are easy to obtain, and cost is relatively low. By means of field tests, the casting powder is melt uniformly and stably, the indentation rate of the edges of the casting blanks is decreased by about 9.5%-19%, quality of the casting blanks is improved, and smooth operation of processes of a steel mill is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of preparation of auxiliary materials for steelmaking, and in particular relates to mold mold slag for austenitic antibacterial stainless steel. Background technique [0002] Antibacterial stainless steel refers to a new type of stainless steel with stable processability and good antibacterial properties after adding an appropriate amount of antibacterial chemical elements (such as copper and silver) to stainless steel of a certain composition. The successful development of antibacterial stainless steel provides a broad space for the development of antibacterial products. The development potential of antibacterial stainless steel products is huge, and the market prospect is extremely broad, but austenitic antibacterial stainless steel needs to add copper and silver components on the basis of ordinary stainless steel, and the continuous casting production process is prone to defects such as pits, deep vibra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 赵春宝张福杜震宇谭政委马晓娜庞炎庞天敏
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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