Brief introduction of gunning material

 The EAF gunning material bears the same high temperature and harsh working environment as the repaired furnace lining during the smelting process. Therefore, in addition to high refractoriness, erosion resistance, erosion resistance, spalling resistance, etc., the EAF gunning mix must also be compatible with the repaired furnace lining. The lining has good adhesion.

The gunning materials for electric furnaces include magnesia, magnesia-dolomite, magnesia-chromite, magnesia-carbon, magnesia-dolomite-carbon, etc., and some highly active seawater magnesia are used in the aggregate. To promote sintering and improve the density and strength of the gunning layer. In order to make the gunning material solidify quickly during the gunning operation and attach to the furnace lining at the same time, a small amount of additives are often added to the aggregate.

1.When adding Al, Mg and other low melting point metal powders for gunning, the oxidation heat of metal powder helps to increase the temperature, and harmless oxides are formed in the EAF gunning material to improve the adhesion between the gunning layer and the furnace lining.

2.Add spinel Cr2O3, SiC, B4C, etc. to improve the oxidation resistance and corrosion resistance of the material.

3.Add a small amount of organic fibers with a length of 1~5mm, and melt at low temperature to form air passages, which is conducive to the evaporation and discharge of water in the binder and prevents bursting.

4.Add 0.1~2mm and 10~40mm long metal fibers for tapping and other parts to improve the corrosion resistance of the gunning layer.

5.Add part of the slag of the metallurgical furnace to improve the adhesion and corrosion resistance of the EAF gunning mix.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality EAF gunning material are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:Brief introduction of gunning material
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