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Any person engaged in the production of cement, clinker free lime are all familiar is related to important indicators of quality of cement, it said calcined raw material of calcium oxide and silica, alumina, iron oxide remaining after combined degree, it will directly The stability of cement and clinker strength. But it is not, after all, the final performance of cement, only to meet end-use product performance should possess the necessary conditions. Therefore, control of the indicators, there are some really inaccurate understanding or even misunderstanding: 1, that the clinker free lime content the lower the better, because it shows that burning completely, the best quality of clinker. 2, as long as the clinker free lime is high in the control of the operator failed in its obligations, so the assessment as the operator indexes the most important quality requirements. 3, clinker free lime high, it will only reduce the clinker KH, do not know with other measures. 4, a slight problem as long as the stability of cement, it will only reduce the clinker by means of free calcium oxide content, will not use other technology measures. Of these errors need to make the following clarification: 1, free lime content of cement used in the process only indicators, not the ultimate target. Because a small amount of residual free lime in the clinker into cement, so that the whole process before use can be digestion, so do not need a kiln, clinker free lime content is very low, but should pay more energy, exploring the most beneficial for the company related to the strength of clinker ingredients and operating parameters, is the fundamental business benefits. 2, of the kiln, the clinker free lime control than the conventional rotary-type shaft and is much easier, no longer should be the production control difficult. Therefore, enterprises should not be condoned in the blind pursuit of control of the operator of free calcium oxide content of the passing rate and absolute, regardless of other indicators; nor should improve heat rate, and endlessly down clinker free lime content. 3, clinker free lime can be divided into: light burned free lime. Instability or collapse due to feeding amount expected, skin off the kiln, or changes in fuel composition or flame shape well, making some, and even partial calcination temperature of raw material shortage, in 1100 ~ 1200 the low temperature formation of calcium oxide. Mainly in the yellow powder and wrapped sandwich clinker raw material powder, they are not harmful to cement stability, but would clinker strength decrease. a free calcium oxide. They are high in the ingredient composition of calcium oxide, calcined raw material is too rough or bad, the clinker compounds still exist in the oxidation of calcium. Calcium oxide at high temperature calcination of these were "dead burning state" compact structure, large crystal, with water to form Ca (OH) 2 Very slow reactions were usually three days to harden the solid phase followed by volume expansion, formation of the cement within the local expansion of the stress, deformation or cracking its collapse. secondary free lime. When the firing of the clinker cooling just slow or reducing atmosphere, C3S, and a decomposition into CaO and C2S (about 1100 for this reaction in the decomposition rate of the fastest, but because of the clinker cooling rapidly, and are usually rare) , or replace the alkali clinker C3S, C3A in calcium oxide. Because they are free out again, so called secondary free calcium, such free lime hydration of free calcium oxide faster than a faster than light burned free lime to be slow, have some influence on cement stability. So, when the production of calcium oxide with high results, the measures taken can not be generalized, KH blindly adopt measures to reduce the clinker. Measures in the ingredients, to consider the SM and IM's with. In the operation to stabilize the raw material and out to avoid the collapse kiln skin. As the kiln feed of all of their remaining facilities, cyclone preheater system, the higher the kiln speed, multichannel technologies such as coal management measures to control the free lime kiln capacity is far higher than other type of low calcination free lime in the clinker is its advantage. At the same time, it must be clear, the central control operator on the free calcium oxide content of the control means only the flame shape and the calcination temperature. 4, clinker free lime content is the main reason for stability of cement, but the types of admixtures and cement content, cement fineness, cement content and cement water storage time on stability of cement have a great impact. When the clinker free lime to cement stability of high-impact, in addition to reducing the clinker free lime content, but also by increasing the admixture can improve the fineness of cement grinding process measures to resolve. If you just keep asking to lower the clinker free lime, may reduce the clinker strength, improve the kiln's heat load, to shorten the service life of refractory bricks, thereby increasing the cost of cement production. The e-commerce company in China offers quality products such as China moon jar solar light , China solar windmill toy, and more. For more , please visit solar powered table lamp today!
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