wanhaorefractory

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...

(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, ...

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...

With the degree of oxidizability, basic slag performs different color, thus slag color is the sign of the deoxidation degree of slag and molten steel. When the oxidizability is high, slag is black, with the oxidizability of slag goes weaker, which means deoxidization of slag , the color of slag becomes lighter as black→grey→brown→yellow→light yellow→white(FeO+MnO normally less than 1%). Black: FeO+MnO>2%. Means bad deoxidation, further deoxidation from slag is required, aluminium grains, accelerator, slag regulator, multifunctional desulfurizer and compound desulfurizer can be used to do it. Grey to brown: FeO+MnO=1~2%. A certain degree of deoxidization is required. Yellow to white: With good deoxidization . Yellow means there is desulphurization, this kind of slag will break into powder after cooling. Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, ...

During continuous casting, the casting powder is mostly used (together with submerge nozzle) except from casting billets with small section. Practice has proved that this process is one of the important conditions to ensure the quality and normal operation of casting billet. In the early 1970s, the process was successfully applied to slab continuous casting in our country and solved the problem of slab longitudinal crack, and then was gradually popularized and applied. In recent years, a series of protective slag has been established, Some special fluxes for continuous casting of special steel are developed, which provide necessary conditions for further development of continuous casting in China. There have many kinds of refractory products in our factory. Function of mold fluxes : 1 Insulation 2 Isolating air and preventing molten steel from oxidizing two times 3 Purify the slag interface and absorb the inclusions in molten steel 4 Lubrication shell an...

When customers purchase firebrick from us, and we certainly have to introduce them a range of knowledge about firebrick, and the density of firebrick most need to know, let our technician to tell you how to introduce customers firebrick density. Firebrick densities are based on different raw materials to the decision, because if the density of refractory bricks are the same, then it shows all aspects of the refractory bricks are the same, so if we choose firebrick, what does that mean? The density of the refractory bricks so we made a classification according to the material used in refractory bricks. The density of the refractory bricks and refractory bricks may also be resistant to some of the impurities in the outside world.   Refractory bricks density of different materials:   Ordinary firebrick: 1.8 ~ 2.0g / cm3 Dense firebrick: 2.05 ~ 2.20g / cm3 Silica brick: 1.80 ~ 1.95g / cm3 Magnesia brick: 2.60 ~ 2.70g / cm3 Alumina ...