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Continuous casting used crystallizer casting powder for plate blank and preparing method thereof

A continuous casting mold and mold flux technology, applied in the field of continuous casting mold flux and its preparation for slabs, can solve the problems of reducing the type of base material, prone to segregation, instability, etc., and achieve strong adsorption of inclusions capacity, reducing serious pollution problems, and reducing inspection costs

Active Publication Date: 2014-03-19
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent application number is CN102430730A, "A Method of Using Electrolytic Aluminum Waste Slag to Produce Continuous Casting Mold Mold Slag". The main components of the raw material electrolytic aluminum waste slag are C, F, and Al. The electrolytic aluminum waste slag is mainly used to replace bauxite, Fluorite and carbonaceous materials save costs, but the SIO 2 , Fe 2 o 3 Unstable, requires multiple test mixes
In addition, when some industrial waste is used as the base material for the mold slag, the types of base materials used should be as few as possible to improve the uniformity of the mold slag melting. melting phenomenon

Method used

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  • Continuous casting used crystallizer casting powder for plate blank and preparing method thereof
  • Continuous casting used crystallizer casting powder for plate blank and preparing method thereof
  • Continuous casting used crystallizer casting powder for plate blank and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The flux waste slag formula in the above production process can be shown in the following table:

[0030]

[0031] If conventional raw materials are used, the formula is shown in the table below:

[0032]

[0033] From the comparison of the above data, it can be seen that 27% of the flux waste slag replaces 18% of wollastonite, 5% of cryolite, 4% of fluorite, 3% of calcite, 4% of magnesium powder, and 3% of bauxite in the conventional formula. , plus 5% soda ash and 5% quartz; the raw material cost of the conventional formula is 1253.5 yuan / ton, and the flux waste slag is calculated at 350 yuan / ton, and the raw material cost of the flux waste slag formula is 945.8 yuan, which reduces the raw material cost by 308.7 yuan / ton;

[0034] In the process ③ in the batching and slurrying, the slurrying time is 62min, and the water content of the slurry is 27%; ④The pump pressure of the spray granulation plunger pump is 2.2MPa, the liquid supply rate is 24mL / min, the flu...

Embodiment 2

[0037] The flux waste slag formula in the above-mentioned production process can also be shown in the following table:

[0038]

[0039] If conventional raw materials are used, the formula is shown in the table below:

[0040]

[0041] From the comparison of the above data, it can be seen that 18% of flux waste slag replaces 3% of cryolite, 11% of wollastonite, 2% of calcite, 4% of coke gem, 2% of bauxite in the conventional formula, and 4% of quartz, 2% of bauxite are added. %NaF, the raw material cost of the conventional formula is 1129.5 yuan / ton, and the flux waste slag is calculated at 350 yuan / ton. The raw material cost of the flux waste slag formula is 874.3 yuan, and the raw material cost is reduced by 255.2 yuan / ton.

[0042] In the process ③ in the batching and pulping, the pulping time is 66min, and the water content of the slurry is 29%; ④The pump pressure of the spray granulation plunger pump is 2.4MPa, the liquid supply rate is 24mL / min, the fluidized be...

Embodiment 3

[0045] The flux waste slag formula in the above-mentioned production process can also be shown in the following table:

[0046]

[0047] If conventional raw materials are used, the formula is shown in the table below:

[0048]

[0049] From the comparison of the above data, it can be seen that 24% of the flux waste slag replaces 12% wollastonite, 5% fluorite, 9% calcium carbonate, 3% glass stone, 2% bauxite in the conventional formula, and 4% calcite and 3% quartz; the raw material cost of the conventional formula is 1214.6 yuan / ton, and the flux waste slag is calculated at 350 yuan / ton. The raw material cost of the flux waste slag formula is 948.4 yuan, which reduces the raw material cost by 286.2 yuan / ton.

[0050] In the process ③ in the batching and pulping, the pulping time is 70min, and the water content of the slurry is 30%; ④The pump pressure of the spray granulation plunger pump is 2.5MPa, the liquid supply rate is 24mL / min, and the fluidized bed The tempera...

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Abstract

The invention discloses continuous casting used crystallizer casting powder for a plate blank and a preparing method thereof. The casting powder comprises, by weight, 28-30% of SiO2, 35-37% of CaO, 3.3-4.8% of MgO, 0.7-1.3% of Fe2O3, 5-7% of Al2O3, 9-11% of Na2O, 8-10% of F, 3-5% of solid carbon. The method comprises the steps of raw material preprocessing and detection, casting powder formula design, batching and slurrying, spray granulation, screen-dedusting and product detection. According to the method, the production technology is simple, the amount of dust is small, spreadability is good, slugging can be achieved evenly and stably, and contribution to the environment is big. Detection proves that compared with a method using conventional raw materials, the method has the advantages that due to the adoption of soldering flux waste residues which serve as the raw material, the cost of the casting powder is reduced by 255-308 yuan / ton, and after the casting powder is used for production, the primary qualified rate of casting blanks is increased by 3.0-3.8% on year-on-year basis.

Description

technical field [0001] The invention belongs to the technical field of metallurgical auxiliary materials, and in particular relates to mold powder for continuous casting molds for slabs and a preparation method thereof. Background technique [0002] my country's steel industry After nearly ten years of rapid development, the output of crude steel increased from 130 million tons in 2000 to 716 million tons in 2012. However, today's steel industry is facing a bottleneck period of development. On the one hand, there is a disorderly expansion of production capacity, and the domestic steel production capacity is obviously surplus; on the other hand, the industry's profit margin has fallen sharply. Reappearance is entering a longer period of adjustment. All iron and steel enterprises have lowered the purchase price of various raw materials and fuels, including continuous casting mold powder, and the prices of various raw materials for continuous casting mold powder have been ri...

Claims

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Application Information

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IPC IPC(8): B22D11/111
Inventor 张国令陈守杰
Owner HENAN TONGYU METALLURGY MATERIALS GRP
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