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The iron runner lining does not receive all the erosion evenly during use. In the later stage of use, partial damage, flaking, cracking may occur, especially in the main iron runner. In order to balance the loss of the lining of the refractory material , it is necessary to increase the service life while effectively utilizing it. A better way is to use the hot spray method. For the iron storage trench, the residual iron stored at the bottom of the iron runner must be cleaned out before the spraying operation. Therefore, it is necessary to pay attention to selecting the appropriate timing for spraying to achieve better results. The most suitable timing for spraying should be selected when the iron line is damaged, and the slag line concave and reaches a certain level. The timing of the spraying should be selected when the surface temperature of the iron runner lining is from 800℃ (reddish red) to 500℃ - 600℃ (beginning to turn black). Wanhao is a manufacturer who is spe...

In order to improve the quality of the refractory castable , the following technical measures could be taken. 1. Raw materials of high purity, low impurity, stable volume at high temperature are the main conditions; 2. Minimize the amount of cement used. As the temperature increases, the CaO content increases, and the amount of liquid phase increases greatly; 3. Adding an appropriate amount of soft clay as a sintering agent to promote the formation and sintering of the liquid phase; 4. Improve the volume shrinkage of material during the sintering, adding an additive that produces an expansion effect at a high temperature; 5. Add heat-resistant steel fiber to improve stability and enhance toughness; 6. Add an appropriate amount of antiknock agent to promote the smooth discharge of water vapor and improve the baking quality. Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making? refractory products ?for electric furnace, ladle, tu...

In recent years, with the development of science, based on the consideration of cl ion corrosion gasifier wall, the dew point temperature of gasifier has been raised, and some lining structure and materials have been changed. At present, the new configuration scheme: the refractory lining of the gasifier is mainly divided into four layers from the inside to the outside: the facing surface is chrome aluminum zirconium brick, the back lining brick is chrome steel jade brick, the third layer is changing from the traditional hollow alumina hollow ball brick to the silicon carbide (SiC) brick and the fourth layer is refractory fiber or plastics. By comparison, it can be found that the thermal conductivity of the two materials is quite different, and that the GE company chooses silicon carbide (SiC) brick as thermal insulation brick to ensure higher dew point temperature, so as to reduce the corrosion of furnace wall caused by cl ion and prolong the service life of gas...

(1) The vibrating bar must not touch the core and the heat insulating material, so it should be kept at a certain distance from the core and the heat insulating material, but it should not be larger than 50mm. (2) The penetration depth of the vibrating bar shall not touch the underlying castable , but the distance from the lower layer shall not exceed 50 mm. (3) The distance of the insertion point of the vibrating bar should not exceed 200mm, keep the uniform and dense vibration, and slowly lift the vibrating bar when it is pulled out. Do not pull out suddenly to avoid leaving holes. (4) A special person should be in charge of mastering the vibrating rod. If it is found that there are unqualified quality requirements, it should be treated in time to continue construction. (5) Pouring the wall of the package is usually two rounds of material vibration, each feeding thickness is about 250mm, to achieve uniform cloth, and pay attention to uniform vibration, ...

When the CaF2 content in slag is less than 9%, with the increase of CaF2 content, desulfurization degree goes up. When the CaF2 content in slag is between 9% and 10%, desulfurization degree reaches a maximum. When the CaF2 content in slag is more than 10%, with the increase of CaF2 content, desulfurization degree goes down, this is from the perspective of thermodynamics. From the perspective of molecular theory, the desulfurization reaction of slag is: CaO2+[S]=(CaS)+[O], with the process of desulfurization reaction, solid CaS will be formed at the slag level, which will stop desulfurization reaction and makes liquid phase quantity decrease. CaF2 is good for the destruction of solid CaS, which increases liquid phase quantity and improves desulfurization condition, but when the content of CaF2 is enough to stop solid CaS from forming, more CaF2 will make the CaO in slag diluted, which will decrease the effective concentration of CaO and bad for desulfurization. ...

(1) High-aluminum ramming mass is suitable for the top of electric arc furnace and the outlet of rotary kiln;   (2) Magnesium ramming mass is suitable for the furnace bottom of electric arc furnace, open hearth furnace and converter; (3) Dolomite ramming mass is suitable for the bottom of converter and ferroalloy electric arc furnace; (4) Graphite and silicon carbide ramming mass are suitable for blast furnace and iron trough. Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, blast furnace, AOD furnace, IF furnace, etc.

Although the melting point of aluminium and aluminium alloys is not high, their chemical activity is very high and they are easy to react with different components in furnace lining. The fluidity of aluminium melt is good and it is easy to penetrate into lining. The lining thickness of medium frequency aluminium melting furnace is only 80-100 mm, the temperature difference between inside and outside is large, and the alternation of heat and cold is frequent. Therefore, the refractories used in furnace lining are required to have high chemical stability, high strength, corrosion resistance and erosion resistance, as well as volume stability, rapid cooling and heat resistance, and not easy to stick slag, which is easy to remove after sticking slag. Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, blast furnace, AOD furnace, IF furnace, etc. Article Source: Casting Mo...