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Efficient composite slag lotion

A technology for compounding slag and slag washing agent, applied in the field of iron and steel smelting, can solve the problems of rising melting temperature and decreasing desulfurization ability, and achieve the effects of promoting melting, enhancing fluidity and reducing viscosity

Inactive Publication Date: 2014-10-01
河南鹏钰集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] High-alumina cement is mainly used in the construction field. The main component is calcium aluminate, and the alumina content is about 50%. At present, there are basically no reports on the use of high-alumina cement in molten steel refining. There are only reports about calcium aluminate as pre-melted refining slag Documentation of the main raw materials, where, usually CaO and Al 2 o 3 It is mixed according to the molecular ratio of 12:7, so it is called calcium aluminate refining slag, and its calcium oxide content is controlled at a low level. For slag, increasing the calcium oxide content can improve the deoxidation ability of calcium aluminate refining slag, but it will also cause an increase in its melting temperature. Laboratory studies have found that when the additional calcium oxide content increases to 20%, its desulfurization ability is slightly reduced. decline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation of efficient composite slag lotion of the present invention can follow the steps:

[0031] ① Raw material inspection and proportioning: according to the raw material formula and material requirements, weigh 49 parts of calcium powder, 45 parts of aluminum ash, 5 parts of high alumina cement, and 1.0 part of CMC, and stir them evenly to prepare a mixture;

[0032] ② Stirring with water: add 18 parts of water to the mixture and stir;

[0033] ③Pellet making: Using conventional disc granulation technology, the mixed material after adding water is made into granules;

[0034] ④ Drying in the pit: Dry the obtained particles at 65°C, and determine the components of the obtained high-efficiency composite slag lotion after drying, including: CaO 30%, Al 2 o 3 40%, Al 5%, SiO 2 7.7%, MgO 8%, H 2 O 0.3%.

Embodiment 2

[0036] The preparation of efficient composite slag lotion of the present invention can follow the steps:

[0037]① Raw material inspection and proportioning: According to the raw material formula and material requirements, weigh 50 parts of calcium powder, 40 parts of aluminum ash, 8.8 parts of high alumina cement, and 1.2 parts of CMC, and stir them evenly to prepare a mixture;

[0038] ② Stirring with water: add 19 parts of water to the mixture and stir;

[0039] ③Pellet making: Using conventional disc granulation technology, the mixed material after adding water is made into granules;

[0040] ④ Drying in the pit: Dry the obtained particles at 69°C, and determine the components of the high-efficiency composite slag lotion after drying, including: CaO 31.2%, Al 2 o 3 37%, Al 4.5%, SiO 2 8%, MgO 7.8%, H 2 O 0.35%.

Embodiment 3

[0042] The preparation of efficient composite slag lotion of the present invention can follow the steps:

[0043] ① Raw material inspection and proportioning: According to the raw material formula and material requirements, weigh 55 parts of calcium powder, 35 parts of aluminum ash, 9.5 parts of high alumina cement, and 0.5 part of CMC, and stir them evenly to prepare a mixture;

[0044] ② Stirring with water: add 20 parts of water to the mixture and stir;

[0045] ③Pellet making: Using conventional disc granulation technology, the mixed material after adding water is made into granules;

[0046] ④ Drying in the pit: Dry the obtained particles at 71°C, and determine the components of the obtained high-efficiency composite slag lotion after drying, including: CaO 35.5%, Al 2 o 3 32.7%, Al 3.9%, SiO 2 7.2%, MgO 6.5%, H 2 O 0.53%.

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Abstract

The invention discloses efficient composite slag lotion which comprises the following raw materials in percentage by weight: 49-70% of calcium powder, 20-45% of aluminum ash, 5-12% of high-alumina cement and 0.5-2.0% of sodium carboxymethylcellulose. The calcium powder, the aluminum ash and the high-alumina cement are applied to synergic desulfuration, and are used for mutually filling and refining the porous structure of the slag lotion, and the obtained efficient composite slag lotion is good in deoxidation and desulfuration effect and impurity absorption effect and rapid in slagging speed, and has a remarkable function in improving the comprehensive economic benefits of steel plate companies.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a high-efficiency composite slag lotion. Background technique [0002] With the continuous progress of economic development, the quality requirements of customers for steel products are also further improved. In the process of steel production, how to use low cost to improve the cleanliness of molten steel and reduce the content of inclusions in steel is the key to expanding the market. Out-of-furnace refining technology is the key to obtain high-yield and high-quality steel products, that is, slag washing and argon blowing are used to achieve the effect of deoxidation, desulfurization and removal of inclusions, which meets the quality requirements of finished molten steel and reduces smelting costs. [0003] The commonly used slag washing agents are pre-melted refining slag and CaO-Al 2 o 3 -CaF 2 The former has high production cost, hig...

Claims

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Application Information

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IPC IPC(8): C21C7/04C21C7/076
CPCY02P10/20
Inventor 程卓高云强
Owner 河南鹏钰集团有限公司
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