Customer in Uzbekistan ordered 30 tons refractory fire bricks and 85tons silica bricks
In Jan. 30 tons refractory fire bricks and 85tons silica bricks are packed for delivering to customer in Uzbekistan. High quality and nice price refractory fire bricks in Topower Refractory.
In the production of silica bricks, particles composition is very important to ensure the density of silicon bricks, especially the manufacturing of high -density silicon bricks.
Because the raw materials are crispy, the particles will be broken during the mixed and molding process. During the burning process, the expansion and cracking of the particles will cause the particles. Therefore, the particles in the ingredients are for the production of silica bricks, in addition to paying attention to the most closely stacking principles, they must also fully consider the impacts of various aspects such as mixed training process, molding pressure, and firing conditions.
When the particle size of the raw material particles is large, the bricks are more easily crushed during the molding process. The volume expansion caused by the transformation of the material of the raw material during firing is also very easy to crack. Therefore, the critical particle size of silica brick production cannot be greater than 3mm; when the veins are raw materials; less than 2mm. When choosing a critical particle size, the bricks should not be loose and ruptured when firing, and dense stability is the most suitable.
The mass ratio of 3 ~ 1mm is 35%~ 45%, the mass ratio of 1 ~ 0.088 mm is 20% to 25%, and the mass is less than 0.088mm. The mass is 35% to 40%. In addition, due to the effects of fine particles and mineralized agents and the small swelling of sintering, the volume expansion is small during the transition, which is conducive to the stable volume when the silicon brick is fired. Therefore, the amount of fine powder can usually be appropriately added. Mineralizers contain some compounds of iron, calcium, and manganese components. For example, the coke furnace silica bricks can add 2% CaO and 2% M0, and the height of high silicon bricks can add 0.8% FeO and 0.2%CaO . CaO and FeO are attracted in the form of limestone and iron scales or iron dumbs, respectively. Mineralizers can also be added with people. For example, the use of limestone’s footprints as calcium -containing minerals, adding people in the form of pyrite slag. The adhesive can use industrial wood sulfonate and lime milk.
The nature and quantity of the two particles in the particles of particles have a great impact on sintering and loosening the brick in the process of firing. Rough particles form the billet skeleton. However, the rough particle phase changes lasts for a long time, and it often occurs after the thin phase transformation and the body start sintering. Therefore, the volume expansion generated by the transformation of the thick particles is an important reason for the tendency to be loose and cracking.
The more rough particles, the lower the brick began to expand the temperature. The greater the tendency to crack the brick brick when firing. For silica bricks composed of different raw materials and different particles The blank body is swollen in the opposite of coarse particles, and the fine powder is mostly at the pores of the coarse particles. Due to the larger surface area of fine powder, the greater the mineralization, the greater the tendency of cracking.
Fine powder less than 0.088 mm is the most dynamic part of sintering. Because the occurrence of liquid phase can buffer the stress caused by the expansion of the part, and because the fine powder is relatively prone to littering, there is sufficient fine powder content in the brick. The change of the rough particles in the burn of the blank is: “transform, one expansion and one rupture”; and the fine particles are “transforming one -sintering and shrinking.”
Therefore, the production of silica bricks must pay attention to the size control of the particles.
