Steel mills to reduce the consumption of iron and steel to consider

The reduction of steel consumption by steel mills can be considered in the following areas:
1.Reduce the proportion of molten iron, scrap, stable converter loading
From the practice, to explore the converter cold material in the best combination of chisel and scrap, adjust the molten iron, scrap material structure and furnace volume, in order to reduce material consumption.
2, high pull carbon blowing blowing operation process
Converter smelting the implementation of high-carbon carbon blowing operation process, blowing the end of the steel according to the specifications of some high-carbon, so that the converter end of carbon to reduce the slag TFe content, thereby improving the quality of molten steel, reducing the consumption of converter steel The
3, slag operation
Slag operation is a great economic benefits of the process, some slag can be recycled, high alkalinity of the slag to participate in smelting, reducing the amount of lime, while the residue in the TFe in the next furnace smelting when the recovery, reducing the steel Material consumption.
4, reduce the splash loss
1) the appropriate increase in furnace capacity, increase the effective volume of the furnace, in order to facilitate the reflection of the spatter.
2) to improve the slag process, in the second batch of slag before adding, through the advance slagging method, the peak of the foam slag forward, so that the peak time with decarburization staggered.
3) Temporarily increase the gun position before the peak of decarburization is reached, and then gently return to normal.
4) blowing the final use of pressure gun bit operation, to strengthen the pool stirring.
5, tapping temperature drop
Steel mills take measures:
1) to reduce the number of online ladle turnover, by improving the efficiency of ladle turnover, reduce the heat loss of ladle.
2) casting machine in the package plus insulation cover insulation and the use of long water, immersion nozzle protection measures to reduce the package process temperature drop.
3) ladle baking device regenerative transformation, improve the ladle baking temperature, reduce the ladle heat absorption.
4) converter iron mouth to expand, shorten the steel time, reduce the temperature drop process.
5) ladle outlet to expand, reducing the ladle to the package in the process of temperature drop.
6) converter, continuous casting transformation, shorten the smelting cycle, from 30min shortened to 26min, reduce the process temperature drop.
6, equipment aspects
Continuous casting application Mold liquid level automatic control, automatic water distribution, in the package continuous temperature measurement technology to transform the casting machine, can improve the finished product rate, reduce iron consumption.

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Research on Burning Process of Refractory Brick

The components of the additive are compatible with the glass components and can react with the Cr2O3 at the same time to refractory brick promote the thermal defects in the interior and the surface of the Cr2O3 crystal and the Schottky thermal deformation in the heated state. , To accelerate the process of mass diffusion and surface diffusion of the material firebrick refractory during firing. Some of the components in the additive react with Cr2O3 to form a solid solution, which is crystallized from the melt and deposited at the grain boundaries of the Cr2O3 grains to form a ring crystal band to control the growth of the Cr2O3 grains and to strengthen the intergranular phase Combined to improve the strength of the product. Based on the above considerations, a number of additives were selected for the experimental study, where two representative additives were screened for comparison, one for additive A and the other for additive B.
Effect of Additives on Product Properties. At lower temperatures can significantly promote the Cr2O3 material sintering, refractory castable access to physical and chemical indicators to achieve or exceed the advanced products of similar products. In order to be able to fully crush Cr2O3 at lower temperatures, two techniques have been taken: (1) to improve Cr2O3 fineness as much as possible without affecting the yield of the product. (2) the introduction Refractory company of the ion radius and Cr3 + radius of the similar additives, so that in the appropriate (2) the introduction of the ion radius and Cr3 + radius of the additive, so that the greater the size of the grain, the greater the degree of distortion and radius of curvature of the grain, the higher the activity of the insulation products material, Oxygen partial pressure range sintering to form continuous solid solution and finite solid solution, destroying the ordered arrangement of Cr atoms, leading to the introduction of atomic potential around the change, resulting in Cr2O3 crystal periodic potential field distortion, accelerate the self-diffusion rate of chromium ions, Promote the sintering of Cr2O3 material.