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A kind of billet medium and low carbon steel continuous casting mold powder and its preparation method

A continuous casting crystallizer and low-carbon steel technology, which is applied in the direction of liquid separation into beads and granulation, can solve problems such as instability, prone to segregation, and reduction of base material types, so as to reduce inspection costs and reduce serious pollution problems , the effect of strong adsorption capacity

Active Publication Date: 2016-08-17
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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  • A kind of billet medium and low carbon steel continuous casting mold powder and its preparation method
  • A kind of billet medium and low carbon steel continuous casting mold powder and its preparation method
  • A kind of billet medium and low carbon steel continuous casting mold powder and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The flux waste slag formula in the above production process can be shown in the following table:

[0029]

[0030] If conventional raw materials are used, the formula is shown in the table below:

[0031]

[0032] From the comparison of the above data, it can be seen that 23% of flux waste slag replaces 13% of wollastonite, 5% of burnt gemstone, 2% of fluorite, 2% of cryolite, 4% of bauxite, and 3% of conventional formula. Magnesium powder, plus 4% quartz, 1% calcite, and 1% soda ash; the raw material cost of the conventional formula is 1146.15 yuan / ton, and the flux waste residue is calculated at 350 yuan / ton. The raw material cost of the flux waste residue formula is 786.28 yuan, and the flux waste residue makes the raw material cost Reduced by 359.87 yuan / ton;

[0033] In the process ③ in the batching and pulping, the pulping time is 65min, and the water content of the slurry is 28%; ④The pump pressure of the spray granulation plunger pump is 2.7MPa, the liquid ...

Embodiment 2

[0036] The flux waste slag formula in the above-mentioned production process can also be shown in the following table:

[0037]

[0038] If conventional raw materials are used, the formula is shown in the table below:

[0039]

[0040] From the comparison of the above data, it can be seen that 25% of the flux waste slag replaces 12% of wollastonite, 9% of glass stone, 4.5% of fluorite, 2% of clay, 2% of bauxite, and 2.5% of ice crystals in the original formula. Stone, 2% manganese carbonate, plus 4% quartz, 3% soda ash; the raw material cost of the conventional formula is 1312.54 yuan / ton, and the flux waste slag is calculated at 350 yuan / ton, the raw material cost of the flux waste slag formula is 834.39 yuan, and the flux waste slag makes the raw material The cost was reduced by 478.15 yuan / ton.

[0041] In the process ③ in the batching and pulping, the slurrying time is 72min, and the water content of the slurry is 30%; ④The pump pressure of the spray granulation plu...

Embodiment 3

[0044] The flux waste slag formula in the above-mentioned production process can also be shown in the following table:

[0045]

[0046] If conventional raw materials are used, the formula is shown in the table below:

[0047]

[0048] From the comparison of the above data, it can be seen that 27.5% of flux waste slag replaces 15% of wollastonite, 17% of calcium carbonate, 4% of fluorite, 3% of bentonite, 1% of bauxite, and 5% of quartz in the conventional formula. , 4.5% calcite, 3% soda ash; the raw material cost of the conventional formula is 1265.76 yuan / ton, the flux waste slag is calculated at 350 yuan / ton, the raw material cost of the flux waste slag formula is 864.83 yuan, and the flux waste slag reduces the raw material cost by 400.93 yuan / ton.

[0049] In the process ③ in the batching and pulping, the pulping time is 80min, and the water content of the slurry is 32%; ④The pump pressure of the spray granulation plunger pump is 3.1MPa, the liquid supply rate is 2...

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Abstract

The invention discloses a mold powder for continuous casting of low carbon steel in billets and a preparation method thereof. The mold powder components (unit: Wt %) include: CaO 28-31, SiO 2 29~32, MgO 2.4~3.6, Fe 2 o 3 0.8~1.4, Al 2 o 3 7.5-9, Na 2 O 5~7, F5.5~7.5, C 固 9.5 to 10.5; the method includes raw material pretreatment and testing, mold powder formula design, batching and pulping, spray granulation, screening and dust removal and product testing; this method has simple production process, less dust, good spreadability, and is environmentally friendly The contribution is large. After testing, flux waste slag is used as raw material. Compared with conventional raw materials, the cost of mold slag is reduced by 359-478 yuan / ton. After being used in production, the first-level pass rate of cast slabs increased by 2.7-3.3% year-on-year.

Description

technical field [0001] The invention belongs to the technical field of metallurgical auxiliary materials, and in particular relates to mold slag for continuous casting molds of low-carbon steel in square billets and a preparation method thereof. technical background [0002] After more than ten years of rapid development of my country's steel industry, 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 ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111B01J2/02
Inventor 张国令陈守杰
Owner HENAN TONGYU METALLURGY MATERIALS GRP
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