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Preparation method of continuous casting mold flux with high iron content in laboratory

A technology for continuous casting mold slag and laboratory use, which is applied in the field of preparation of continuous casting mold slag with high iron content in the laboratory. It can solve the problems of large amount of preparation, difficulty in sampling, and high cost, and achieve simple preparation process, avoid waste and high cost. Cost, the effect of resource cost saving

Inactive Publication Date: 2015-09-16
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the continuous development of the metallurgical industry, the types of mold fluxes are becoming more and more diverse, and the content range of each element is also expanding. When it comes to standard revision, laboratory capability comparison, and process parameter research, it is especially necessary to have some Mold slag samples with very high iron content or very low iron content are rarely used, and mold slag samples with high iron content are rarely used in actual production. They are only used for small batch trial production for scientific research, and it is difficult to take samples. Many research works have caused trouble. If you do not take samples from the production site, but use mineral raw material proportioning, melting, water quenching, and grinding according to the required composition range to prepare, the cost is very high, and the preparation volume is large. , resulting in a great waste of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The continuous casting mold flux with low iron content for production is used as raw material to prepare laboratory continuous casting mold flux with iron content of 3%. The preparation process is as follows:

[0019] 1) The continuous casting mold powder for production was taken from the production site, dried and pulverized to a particle size of 100 mesh, and the iron content was measured to be 0.7817%. The continuous casting mold powder for production was obtained from Wuhan Iron and Steel (Group) Company Mold slag used in the continuous casting production process of the second steelmaking plant;

[0020] 2) Select the sintered ore GBW07219, in which the iron content is 50.55%, Na 2 O content is 0.055%, K 2 The O content is 0.27%. According to the quality of the required mold slag sample, weigh 500g of the above-mentioned continuous casting mold slag for production. Since it is necessary to obtain a mold slag sample with an iron content of 3%, 23.33g of sintered ore...

Embodiment 2

[0023] The continuous casting mold slag with a low iron content for production is used as a raw material to prepare the continuous casting mold slag with an iron content of 6% for laboratory use. The preparation process is as follows:

[0024] 1) The continuous casting mold powder for production was taken from the production site, dried and pulverized to a particle size of 140 mesh, and the iron content was measured to be 2.659%. The continuous casting mold powder for production was obtained from Wuhan Iron and Steel (Group) Company Mold slag used in the continuous casting production process of the second steelmaking plant.

[0025] 2) Select pellet w88307b, the iron content of the pellet is 62.79%, Na 2 O content is 0.024%, K 2 O content is 0.20%, weigh 500g of the above-mentioned continuous casting mold slag for production according to the quality of the required mold slag sample, because it is necessary to obtain a mold slag sample with an iron content of 6%, the calculati...

Embodiment 3

[0028] The continuous casting mold flux with low iron content for production is used as raw material to prepare laboratory continuous casting mold flux with an iron content of 8%. The preparation process is as follows:

[0029] 1) Take the continuous casting mold powder for production from the production site, dry it and pulverize it to a particle size of 100 mesh, and measure the iron content in it to be 2%. The continuous casting mold powder for production is taken from Wuhan Iron and Steel (Group) Company Mold slag used in the continuous casting production process of the second steelmaking plant.

[0030] 2) Select pellet w88307b, the iron content of the pellet is 62.79%, Na 2 O content is 0.024%, K 2 The O content is 0.20%. According to the quality of the required mold slag sample, weigh 500g of the above-mentioned continuous casting mold slag for production. Since it is necessary to obtain a mold slag sample with an iron content of 8%, 54.75g of pellet w88307b should be ...

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Abstract

The invention discloses a method for preparing high-iron-content continuous casting mold flux for a laboratory. The method comprises the following steps: 1, after drying continuous casting mold flux for production, of which the iron content is known, grinding the continuous casting mold flux for production to enable the granularity of the continuous casting mold flux for production to be less than or equal to 100 meshes; 2, selecting pellets or sinters with known iron content, uniformly mixing the pellets or the sinters and the continuous casting mold flux for production to form mixed slags, and controlling the use quantity ratio of the continuous casting mold flux for production to the pellets or the sinters in the mixed slags to enable the iron content in the mixed slags to reach a required iron content value of the high-iron-content continuous casting mold flux for the laboratory, wherein the total content of Na2O and K2O is less than 0.35 percent and the content ratio of CaO to SiO2 is 0.7 to 1.5; 3, analyzing a mixed slag sample by an X-ray diffractometer to determine that iron has a consistent crystal structure. The method has a simple, convenient, rapid and flexible preparation flow and provides a convenient, rapid and economic approach of obtaining the high-iron-content continuous casting mold flux required for making and revise of the standards of the mold flux, ability comparison of laboratories and research work such as continuous casting process parameter research.

Description

technical field [0001] The invention relates to metallurgical technology, in particular to a method for preparing laboratory-used high-iron-content continuous casting mold slag. Background technique [0002] Continuous casting mold slag is an indispensable auxiliary material in the process of continuous casting of molten steel. Continuous casting has strict requirements on the composition and performance of mold slag. In order to facilitate the control of its composition and performance, continuous casting mold slag is generally composed of minerals with stable composition, such as: Limestone, fluorite, quartz, and graphite, etc., and chemical raw materials, such as: cement clinker, soda ash, and borax, etc. are produced. The commonly used premelted mold flux is to mix several kinds of raw materials first, melt them at high temperature, water quench, and grind them into premelt materials. Then, according to the performance requirements of the required mold fluxes, add approp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
Inventor 邵梅闻向东陈士华张穗忠吴立新周郑谭谦文斌赵希文
Owner 武汉钢铁有限公司
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