Amorphous Refractory Have A Corresponding Change
Amorphous Refractory Silicate binder as the main variety of unshaped refractory binder is alkali-containing silicate, which is commonly known as water glass.
In refractory materials, most of them are modulus $number amorphous material. Its density and melting point are not fixed, according to the modulus of the different and have a corresponding change, in the modulus of 4 within the range, its density with the increase in SiO2 content. Amorphous Refractory In unshaped refractory materials, the use of viscous water glass, density of 1.30.
Water glass heat-resistant concrete is made of water glass as binder and suitable sodium fluoride as coagulant. Depending on the silica gel produced by hydrolysis of water glass, the aggregate and admixture particles are bonded together. In all kinds of heat-resisting concrete, the strength of water glass heat-resisting concrete is higher, but its fire resistance and load softening temperature are lower. This kind of heat-resisting concrete is suitable for 1000 Shan the following requirements have high strength, good abrasion resistance, can resist acid corrosion, but can not be used for regular water and steam action parts.
The modulus, density and dosage of water glass binder are the important factors affecting the refractory castable of water glass. From the hardening mechanism, Amorphous Refractory it is known that the adhesion, condensation and condensation of silicate gels make the refractory aggregate and powder cemented together to obtain strength. Therefore, when there is sufficient sodium fluoride, the modulus of water glass solution or density increase, can precipitate a large number of silicic acid gel, thereby enhancing the strength. The amount of water glass increased, the porosity of the molding body increased and the performance decreased.
Prolonging the service life of refractory is very important to improve the running rate of rotary kiln and to produce high yield, stable and low consumption. Amorphous Refractory There are many factors that influence the service life of refractory in kiln, such as the rationality of refractory material design, the quality of raw material, the quality of refractory materials, the dry storage of refractory materials, the masonry of refractory materials and the production condition in kiln. This paper is concerned with a wide range, this article only combined with the actual situation of the new mud company, the configuration of refractory in rotary kiln, Amorphous Refractory the selection of brick type for rotary kiln, the design and optimization of block ring
Rotary kiln is a whole, we often according to the process of the process will be divided into the former kiln, lower transition zone, sintering belt, upper transition zone, decomposition zone, after the kiln mouth six parts. These parts must select suitable refractory materials according to the process environment to ensure the safety of equipment.
The front kiln mouth is refers to the kiln mouth pouring material place, this part environment temperature is high, the temperature change is big, does not have the stable kiln skin existence, the clinker attrition and the dust-bearing air flow's scour is serious, requests the refractory material to have the high strength, the good heat shock resistance, the corrosion resistance The range of the front kiln mouth refers to the 0.6 M 1 m from the kiln mouth to the kiln mouth, and the high purity Magnesia spinel castable, Amorphous Refractory Mullite castable and corundum castable are commonly used, which are G-17K, As-A, NH-70, RT-70MC, LB 54S, GB sic sre. My company new 5 $number T D production line selection is more NH-70 and RT-70MC, the use of the effect is also good, the period of more than 6 months.
The lower transition zone actually refers to the cooling zone, where the liquid phase reduces the formation of clinker granules. The temperature of this part is high, the temperature changes frequently, the kiln skin is unstable, the corrosion and abrasion of refractory material is serious, the refractory material has good thermal shock resistance, erosion resistance, high temperature abrasion resistance and good mechanical strength. The scope of this belt refers to the kiln mouth after pouring material to 1.4 M 4.0 m (that is, no stable kiln skin area), the use of bituminous coal or anthracite will be different, because the anthracite coal combustion exists after the delay, flame longer, so burning anthracite when the kiln mouth cooling belt will be longer. Amorphous Refractory Often selected refractory bricks have fused mg-al-Tg-A1, high abrasion-resistant brick HMS, silica-red brick Type I, silica brick 1680, magnesium-aluminum-tipped crystal brick. Our new 5 $number T D production line of the original use of high wear-resistant brick HMS More, the use of a period of about 8-12 months, and then Chongqing platform Mud Line, Anshun platform for the second-tier optimization of fused MG-al-alloy-tipped crystal brick Tg-A1.