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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

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,

Frequent warning of heavy pollution weather, refractory production is in trouble this year. Henan's refractory materials account for about 50% of the country's total refractory output. Henan is also an important R&D and production base for refractory materials . Xinmi's refractory products companies also occupy a large part of Henan's production. This year's peak-peak production plan of Xinmi City also follows the policy of one factory, one policy, and it is strictly forbidden to implement a one-size-fits-all policy. However, in heavy polluted weather, companies must cooperate with policies to limit production or stop. At present, the impact of peak production on the production of enterprises is not great, because all regions in this year have implemented different peaks. At present, the impact on the production of enterprises is the shortage of refractory raw materials . Wanhao is a manufacturer who is specialized in designing various kinds of furnace

The silicon carbide ramming material is made of silicon carbide , graphite and electric calcined anthracite. A kind of loose material made by adding a variety of superfine powder additives, electro fusion cement or composite resin as bonding agent. To fill the gap or stack cooling equipment and masonry masonry filler with leveling layer. The silicon carbide ramming material has good chemical stability, erosion resistance, wear resistance, spalling resistance, heat shock resistance, it is widely used in metallurgy, building materials, non-ferrous metals smelting, chemical, machinery and other manufacturing industries. 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: Silicon carbide ramming material Company name： Wanhao Refractory Email:sales100@wanhaorefractory.com Website: http://www.wanhaorefractory.com/

Dolomite brick is a refractory product that is made from calcined dolomite sand.It usually contains over 40% calcium oxide (CaO), over 35% magnesium oxide (MgO) and a small amount of impurities such as SiO2, Al2O3 and Fe2O3.The CaO/MgO ratio of natural dolomite fluctuates greatly. If the CaO/MgO ratio in brick is less than 1.39, which is called magnesia dolomite brick. According to the production process, dolomite bricks can be divided into: tar (asphalt) combined with non-firing bricks, light burning oil immersion bricks and fired oil immersion bricks. Dolomite brick contains free CaO, easy to hydrate in the air disintegration, not suitable for long-term storage. 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: Use of auto-flow corundum castable Company name：Wanhao Refractory Email:sales100@wanhaorefrac

Alumina brick is a kind of refractory material. The main component of high alumina brick is Al2O3. High alumina brick is a alumina trioxide (Al2O3) content higher than 48% alumina silicate refractory products . It is made from bauxite or other refractory raw materials with high content of alumina through forming and calcining with thermal stability, high refractoriness in more than 1770 ℃. High alumina brick has good slag resistance and is used for lining of steel making electric furnace, glass furnace and cement rotary furnace. 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: The feature of high alumina Brick Company name：Wanhao Refractory Email:sales100@wanhaorefractory.com Website: http://www.wanhaorefractory.com/

The anti-erosion castable refractory is made of aggregate of special vitriol and corundum, powder and additive proportionally. CA-71 is added as the bond and the pulvis is also added in. It is a kind of good auto-flow castable with high anti-erosion ability, high temperature resistance, strong wallop and high stability under heat vibration. It is recommended to be used in the part of complicated or easy been eroded of the boiler as an auto-flow corundum castable with high anti-erosion ability. During the construction, mix the dry basis and added materials (additive, bond and pulvis) well with stirring mill before water is added into (about 5.5%). Then pour it into the form and vibrates to avoid and hole or seam. The form can be removed after 1-day maintenance. Normally, the quality of auto-flow corundum castable has close relationship with stirring mill, the amount and purity of the water. Thus, it is required that stirring mill and water must be clean and you must

Graphite electrodes are used mainly in electric arc furnace steel production. They are presently the only products available that have the high levels of electrical conductivity and the capability of sustaining the extremely high levels of heat generated in this demanding environment. Graphite electrodes are also used to refine steel in ladle furnaces and in other smelting processes. HP Graphite electrode has good electrical properties and chemical stability. What’s more, graphite electrode has advantages of high mechanical strength, low impurity content and good vibration resistance. Graphite electrodes are good conductors of heat and electricity. Graphite electrode is widely used in steelmaking electric furnace, refining furnaces, production of ferroalloy, industrial silicon, yellow phosphorus, corundum , submerged arc furnaces and other smelting furnaces that produce high temperatures by electric arc. According to the different of service power and electricity