博文

目前显示的是 四月, 2019的博文

How should repair the refractory lining of the iron runner

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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

How to improve the quality of refractory castables for electric arc furnace covers

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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