Brand new development strategy of refractory cement rotary kiln system
12 January, 2013 at 5:57 am in Business
Cement rotary kiln is a refractory material to protect its subjects on the one hand to make the rotary kiln lining material from flames and heat loss of the tree cutting on the other hand is to reduce heat loss.
At first, people with very small size of cement rotary kiln, the combustion temperature is also low, only with A1: o a30 it a 40% of a single brick. Initial rotary kiln also follow this experience. However, within the rotary kiln and the rotary kiln air temperature difference between the lining, the lining of the clinker melt erosion of acres of public and therefore they are more strict than the tip adobe rotary kiln in life is much shorter.
With the rotary kiln shaft and the increasing size and improving the quality of clinker, brick increasingly unable to adapt, since the 1930s of the beginning of the high alumina brick rotary kiln lining material with a high temperature.1936 Kang Switzerland is also the first trial in the spinel blocks. The first trial of the 1938 Italian magnesium bell brick. Western Europe in 1953, said to begin using dolomite cement rotary kiln bricks. 50 years into the post-war recovery period Neixi Ou, cement surge requirements, very stringent test of the cement rotary kiln, several practices have become an ordinary magnesia-chrome brick for brick or dolomite rotary kiln lining material with methane as the main body of the situation. 70 years of large-scale cement rotary kiln precalciner rotary kiln to the direction of rapid development.Compared with the conventional rotary kiln, rotary kiln ktemperature of this increase, the rotary kiln speed faster, the traditional common magnesia-chrome bricks with dolomite brick can not meet. The late 1970s, direct result of the Taiwan magnesia-chrome bricks and stone screen products have emerged tip, respectively, for with this rotary kiln and methane into the transition zone, as the main brick rotary kiln with alkaline materials.
Characteristics of the cement rotary kiln refractories
(1) cement rotary kiln refractoriness. Refractory materials at high temperature resistance melting performance. Factors determine refractoriness refractory than the chemical composition, mineral composition and distribution and so on.
(2) thermal shock resistance of cement rotary kiln. Ductility, also known as heat resistance, thermal shock resistance. Refers to the rapid change of temperature refractory resistance. Each turn a rotary kiln, kiln lining the surface temperature on the occurrence of volatile and refractory material has a low internal temperature, the temperature difference between inside and outside the refractory, so that the internal stress, resulting in damage.portable rock crusher: http://www.crusher-machine.com/n219.html
(3) cement rotary kiln temperature load times. Is refractory to high temperature and load the tree with the role of the military resistance performance.
(4) cement rotary kiln vent string. Mainly refers to the refractory Division of porosity string. String holes too, are easy to infiltrate and deposition of harmful smoke components, thereby damaging the kiln lining. However, the string holes are not as low as possible, to maintain a certain degree of apparent porosity of the cement rotary kiln with the formation of skin theft and burning of thermal expansion stress buffer is there are certain advantages.
(5) at room temperature compressive strength of cement rotary kiln. Although rarely used in refractory materials at room temperature due to the static load who were destroyed, but the method is simple compressive strength measured at room temperature Shan Jie, with holes in prison, and other comprehensive performance test results to determine the quality of products and sintering so, it remains one of the most commonly used test.
(6) thermal expansion of cement rotary kiln. Refers to products that occur in the heating process's degree of change, that way the prime minister into line pulse expansion coefficient of linear expansion. Coefficient of thermal expansion of the busy movement of puzzle puzzle when determining the size of a draconian sense seam, have a direct impact on the thermal stability, the greater the thermal expansion coefficient, the greater the internal stress after the refractory heat, rapid temperature changes and easy road damage.
(7) high volume stability of cement rotary kiln. Long-term high-temperature refractory T, continue to change things meet, resulting in recrystallization and sintering, followed by contraction or expansion caused by the volume. Excessive contraction of 51 cracks, expansion is too large will cause cracking.
(8) Cement rotary kiln thermal conductivity. rotary kiln lining of thermal conductivity and thickness of the people affected the surface of the cement rotary kiln heat. Refractory pores Jae Liu thermal conductivity have a major impact. However, a string not lower the better thermal conductivity, low acres of skin will soon hang it difficult.
(9) Cement rotary kiln wear official. Section lining by turning raw materials stolen, clinker friction control, dust and gas station is also affected by erosion, and called for a total of good wear resistance, especially in some key parts of the levy.
(10) Cement rotary kiln chemical resistance properties. Not only by high-temperature rotary kiln lined the role, but also by alkali clinker melt and Taiwan, atmosphere and other gases invasion than it is to be a good chemical resistance properties.