The color of chrome corundum refractory mortar is green, also known as refractory green fireclay, which is the cement for building chrome corundum bricks and can also be used for furnace lining sealing. Refractory cement is composed of powdery refractory materials and binders and is an unshaped refractory material for preparing mud. It is mainly used for the joints of refractory brick masonry and as a coating material. When used as a joint material or coating, it is required to be made of the same material as refractory bricks.
As a joint refractory mortar, its quality has a considerable impact on the quality of masonry. Its main function is to adjust the dimensional error and irregular shape of the refractory bricks to make the masonry tidy and load balanced. And it can make the masonry form a tight and strong whole to resist the damage of external force and prevent the intrusion of gas and molten metal.
The abbreviation of green high-temperature refractory mortar is Green Refractory Mortar (chrome corundum refractory mortar), which is made of alumina and chromium oxide in a certain proportion, and the proportion can be customized. The operating temperature is 1600-1700 degrees, which can be used for sealing. In recent years, with the continuous development of the application field of refractory materials, the service life of the lining material of the submerged arc furnace has been greatly improved, and the service life of the iron hole and the slag hole of the submerged arc furnace is also urgently needed to be improved. Through technological innovation, continuous improvement of process, optimization of formula, research, and development of green chrome corundum refractory mortar for submerged arc furnace with excellent performance and environmental protection. The special green mud is used as the plugging material for the iron hole and slag hole of the submerged arc furnace. Since it was put on the market, it has won the unanimous approval of many customers with its excellent product performance.
Green Chrome Corundum Refractory Mortar has the following characteristics
- The plug opening is easy to operate. There is no need to bake the plug before use, just put it into the mortar gun machine before opening it.
- Excellent filling and sintering properties, good opening performance. The iron hole and slag hole are solidly filled and durable, and the molten iron or slag can flow out at a uniform speed, which is easy to block and open.
- Corrosion and erosion resistance. The channel of the iron hole and the slag hole is stable, the hole expansion of the iron and slag is small, and the iron and slag are more stable and safe. It can guarantee the depth of the iron hole and slag hole for a long time. Extend the service life of the iron hole and slag hole, and improve the comprehensive benefit of the submerged arc furnace.
- The new and old green mud has high bonding strength, good plasticity, easy operation, and effectively improves the operation rate of the submerged arc furnace.
- It can be stored for a long time at room temperature and has a good moisturizing effect.
- Good environmental performance. The product uses a special binder, and there is no smoke during use. Greatly improve the working environment in front of the furnace and protect the health of workers.
The raw material used in chrome corundum series products is a solid solution synthesized by melting alumina and chromium oxide in a certain proportion and melting at high temperatures. The refractory material made by special refractory material production technology can improve and enhance the internal quality of the product and improve the high-temperature performance of the product. The initial color of chromium corundum material is green, after high-temperature sintering, an oxidation reaction will occur, and the color after the reaction will change according to the content of Cr2O3 in the product. If the Cr2O3 content is around 3%, the color is light red. It is purple-red at about 8%. More than 20% of the color will appear dark green, the higher the chromium content, the more black the color.
The load softening temperature of chromium corundum material. From the AL2O3-Cr2O3 binary phase diagram, it can be seen that AL2O3 and Cr2O3 can form a continuous solid solution without eutectic. Therefore, adding Cr2O3 to the high-purity corundum material, regardless of the amount added, not only will not reduce the fire resistance of the material but will improve the fire resistance of material. The refractoriness (>1790°C) and load softening temperature (>1700°C) of chrome corundum materials are better than those of high-purity corundum products.
Strength of chrome corundum material
The room temperature compressive strength of high-purity corundum material is generally 70~100MPa. The room temperature compressive strength of high-performance chromium corundum materials is generally >150MPa and its strength is significantly higher than that of corundum materials. This is because, during the firing process of the product, an Al2O3-Cr2O3 solid solution is formed between the particles and between the particles and the subdivisions. The solid solution links the particles and fine powder together like a bridge, which greatly improves the strength of the material.
Thermal Shock Stability of Chrome Corundum Materials
According to reports, when Cr2O3 is added to corundum, when the Cr2O3 content is 10%~66%, the thermal shock stability of the material decreases with the increase of Cr2O3 content. That is, the chromium corundum material with low Cr2O3 content has better thermal shock stability than the chromium corundum material with high Cr2O3 content. The Cr2O3 content of high-performance chromium corundum material is between 12% and 20%, and its thermal shock stability is improved compared with corundum material. In particular, the chromium corundum material produced by adding a small number of additives that cause phase change has better thermal shock stability.
Slag Erosion Resistance of Chromium Corundum Materials
Cr2O3 or Cr2O3-containing refractories have good corrosion resistance to steel slag, non-ferrous smelting slag, coal gasification slag, oil gasification slag and various glass melts. Cr2O3 melt or Cr2O3 reacts with slag to form a liquid phase with a higher viscosity than other low melts. This prevents the slag from penetrating into the material body along the capillary pores, avoiding the formation of a metamorphic layer and structural spalling.
Application of chrome corundum refractory materials. Used in the steel industry, the service life of chrome corundum material is more than double that of corundum material. Used in the non-ferrous smelting industry, the wear resistance and corrosion resistance of chrome corundum products are obviously better than other products. In the carbon black industry, the life of chrome corundum material is twice as long as that of corundum material used under the same conditions.
Rongsheng Chrome Corundum Refractory Mortar Manufacturer
Rongsheng monolithic refractory manufacturer is a powerful refractory manufacturer and sales company. Our refractory factory has an annual output of 80,000 tons of shaped refractories and 50,000 tons of unshaped refractories. Whether it is refractory brick products or monolithic refractory products, the product quality is reliable and the customer service is comprehensive. Provide the most suitable solution for your high-temperature furnace lining. Reduce production costs and improve economic benefits. Buy green chrome corundum refractory mortar, please contact us, and get the price and sample for free.