Application of electrofusion combined with magnesia chrome brick in copper converter
The use of high-performance magnesia-chrome bricks in the tuyere of the copper converter has been widely promoted. The tuyere area is the most vulnerable part of the copper converter. The main reasons are:
(1) The operating temperature of this part is relatively high, and the temperature fluctuation is large. The temperature change rate before and after the addition of the copper crucible reaches 40 ° C / min or more;
(2) erosion, infiltration of high temperature melts and erosion of gases and melts;
(3) The adoption of new smelting technologies, such as the use of oxygen-enriched blowing technology in the 1990s, made the use of refractory materials in this area more demanding. Therefore, only by continuously improving the magnesium chrome bricks in this part can we adapt to the development of converter smelting technology and improve the service life of the converter.
In the past practical applications, the focus was on solving the thermal shock stability of the refractory material and improving the high temperature strength of the refractory material. Therefore, the direct combination of magnesia chrome brick produced by high temperature sintering was used as the lining. Although the obvious use effect was achieved, the furnace age was basically maintained at about 180 furnaces. The analysis of the residual brick after use shows that the penetration of the crucible is quite powerful, so the focus is shifted from the factors such as thermal shock resistance and high temperature strength to the improvement of the permeability resistance. According to the test results of the basic research, the pre-synthesized magnesia chrome sand was added, and the matrix part was strengthened by Cr2O3 to reduce the impurity content to improve the anti-cracking permeability. The use of electrofusion and magnesium-chromium refractories in large-scale converters is good, and the life of the lining is maintained at about 250 furnaces, thereby achieving the purpose of improving the life of the lining and meeting the production requirements.

Application of electrofusion and magnesium chrome brick in RH furnace
At present, refractory materials for RH furnaces are mainly magnesia-chrome bricks. Compared with other refining equipments, RH vacuum chambers are refractory materials in addition to high temperature steel water and slag during the treatment process. They also suffer from high-speed erosion of steel and rapid temperature changes. Therefore, more stringent requirements are imposed on refractory materials. However, with the increase of smelting strength and the continuous change of smelting steel grades, the service life of existing magnesia chrome bricks can no longer meet the requirements of energy saving and consumption reduction. In order to solve this problem, the development of the original magnesia chrome bricks has been carried out to produce high-performance fused and recombined magnesia chrome bricks, and good results have been obtained in Baosteel's furnace application.

In order to improve the performance of the existing magnesia chrome bricks, fused fused chrome sand and chrome ore with high Cr2O3 content and high purity are the main raw materials. The effects of Cr2O3 content and additives such as high-purity magnesia, TiO2 and Cr2O3 micropowder on the properties of magnesia-chrome bricks were studied.
Application of electrofusion and magnesium chrome brick in RH furnace

In 2006, the company's trial production of high-performance electro-fusion recombined magnesia chrome brick with a content of 26% Cr2O3 was used on the lower tank of Baosteel 1#RH furnace. The service life reached 300 furnaces and the service life increased by 22%. Used in the lower tank of Baosteel 2#RH furnace in February 2007, the service life reached 458 furnaces, and the service life increased by 17.4%, which created the most service life of Baosteel's lower tank refractory, which saved Baosteel a lot of energy and saved energy. The role of reducing consumption.

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Henan hongtai kiln refractory co., LTD. Is well aware that there are thousands of demands from customers, which can be summarized in four aspects: reliable quality, timely delivery, reasonable price and considerate service.The company will continue to adhere to the corporate spirit of "contributing to society and serving customers" and the business philosophy of "mutual benefit, win-win, integrity, efficiency, preciseness and responsibility".Our company is willing to develop a wide range of technical exchanges with colleges and universities and colleagues from all walks of life at home and abroad in a flexible and diversified way.

Henan hongtai kiln refractory co., LTD. Main products are high alumina brick, clay brick, fused zirconium corundum brick, fireproof ball lightweight insulation brick, wear-resistant pouring material, corundum pouring material, low cement high strength pouring material, impermeable material, self-flowing material, plastic material, and various types of refractory materials.For different industries, the cement industry with anti-flaking high-alumina bricks, alkali resistant bricks, phosphate bricks;Boiler industry USES all kinds of brand wear-resisting brick, corundum brick, mullite brick and other finalizing materials.The company insists on "product quality is the life, enterprise integrity is the foundation", in the fierce market competition, won many users' trust and praise.The products are sold all over the country, as far as Vietnam, India, Korea, Pakistan, kazakhstan, Iran and other southeast Asian countries and regions.

Henan hongtai kiln refractory co., LTD. : "quality first, reputation first, customer first: it is our aim."Scientific management, strong technical force, perfect testing means, advanced technological equipment and stable product quality are the guarantee of quality service.Henan hongtai kiln refractories co., LTD sincerely hopes to cooperate with you hand in hand and in good faith.