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Environment-friendly tundish covering agent and preparation method thereof

A tundish and covering agent technology, which is applied in the field of environment-friendly tundish covering agent and its preparation, can solve the problems of insignificant sulfur increase effect, reduced carbon increase, smoke emission, etc., and achieves remarkable environmental protection effect, reduced heat absorption, and suppressed The effect of molten steel temperature drop

Active Publication Date: 2019-12-24
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention has no obvious effect of reducing carbon increase and sulfur increase, and at the same time, the problems of smoke and fire are more serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An environment-friendly tundish covering agent, made of the following raw materials in parts by weight: 34 parts of fused calcium silicate, 22 parts of quartz, 4 parts of fluorite, 20 parts of high-purity cement, 20 parts of high-carbon graphite, carboxymethyl Sodium cellulose 2 parts.

[0030] Among them: SiO in fused calcium silicate 2The mass percentage content of CaO is 28.5%, the mass percentage content of CaO is 56%, and the mass percentage content of MgO is 12%.

[0031] SiO in quartz 2 The mass percent content is 98%.

[0032] CaF in fluorite 2 The mass percentage content is 90%, SiO 2 The mass percent content is 5%.

[0033] High Purity Cement SiO 2 The mass percentage content of CaO is 21.0%, and the mass percentage content of CaO is 65.0%.

[0034] The mass percentage content of fixed carbon in high carbon graphite is ≥81.5%.

[0035] The active ingredient of the environment-friendly tundish covering agent is calculated by mass percentage: SiO 2 : 37...

Embodiment 2

[0042] An environment-friendly tundish covering agent, made of the following raw materials in parts by weight: 40 parts of fused calcium silicate, 35 parts of high-purity cement, 10 parts of quartz, 3 parts of fluorite, 8 parts of high-carbon graphite, carboxymethyl Sodium cellulose 3 parts.

[0043] Among them: SiO in fused calcium silicate 2 The mass percentage content of CaO is 29%, the mass percentage content of CaO is 52%, and the mass percentage content of MgO is 13%.

[0044] High Purity Cement SiO 2 The mass percentage content of CaO is 21.0%, and the mass percentage content of CaO is 65.0%.

[0045] SiO in quartz 2 The mass percentage content is 98.5%.

[0046] CaF in fluorite 2 The mass percentage content is 92%, SiO 2 The mass percent content is 4.5%.

[0047] The active ingredient of the environment-friendly tundish covering agent is calculated by mass percentage: SiO 2 : 29.64%, CaO: 45.90%, MgO: 4.82%, Fe 2 o 3 : 0.97%, Al 2 o 3 : 2.24%, Na 2 O: 0.50...

Embodiment 3

[0054] An environment-friendly tundish covering agent is made of the following raw materials in parts by weight: 70 parts of refining slag, 20 parts of high-purity cement, 5 parts of fluorite, 5 parts of quartz, and 2 parts of sodium carboxymethylcellulose.

[0055] Among them: SiO in premelted refining slag 2 The mass percentage content of CaO is 4.9%, the mass percentage content of CaO is 51%, and the content of Al 2 o 3 The mass percent content is 40%.

[0056] High Purity Cement SiO 2 The mass percentage content of CaO is 21.0%, and the mass percentage content of CaO is 65.0%.

[0057] CaF in fluorite 2 The mass percentage content is 93.5%, SiO 2 The mass percent content is 5.2%.

[0058] The active ingredient of the environment-friendly tundish covering agent is calculated by mass percentage: SiO 2 : 10.0, CaO: 52.0%, MgO: 2.0%, Fe 2 o 3 : 0.54%, Al 2 o 3 : 30.0%, Na 2 O: 1.70%, F - : 2.0%, fixed carbon: 0.5%, alkalinity 5.2.

[0059] The preparation method ...

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Abstract

The invention provides an environment-friendly tundish covering agent and relates to the technical field of metallurgical auxiliary materials. The environment-friendly tundish covering agent comprisesthe following raw materials including, by weight, 0-40 parts of electric fusion calcium silicate, 5-30 parts of quartz, 0-70 parts of premelted refining slag, 0-5 parts of fluorite, 5-35 parts of high-purity cement, 0-20 parts of high-carbon graphite and 2-5 parts of carboxymethylcellulose. The covering agent provided by the invention can be used for remarkably relieving the phenomena that a traditional covering agent is high in smoke concentration and large in fire, meanwhile, the recarburization and resulfurization phenomena can be reduced, and the environment friendly effect is obvious.

Description

technical field [0001] The invention relates to the technical field of metallurgical auxiliary materials, in particular to an environment-friendly tundish covering agent and a preparation method thereof. Background technique [0002] Environmental protection is a topic that is often brought up by people, and the production of steel mills is very detrimental to environmental protection, so green environmental protection is advocated. The sustained and rapid development of the iron and steel industry is inevitable and long-term. Doing a good job in energy conservation and environmental protection plays an important role in the foundation and promotion of the development of the iron and steel industry. In order to achieve sustainable development in the more intense market competition, we must put energy saving and consumption reduction in the first place, formulate feasible energy-saving measures in light of our own actual situation, continuously introduce and develop new techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 李继薛斌曹子乐王建伟杨利
Owner HENAN TONGYU METALLURGY MATERIALS GRP
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