Lime kiln for burning limestone quality testing, the actual production there is a variety of methods, such as abrasion test, the crystal structure observation experiment, calcination experiments, the particle size of limestone and the mineral composition and hardness and other physical characteristics, but also lime kiln calcination is an important raw material selection factors. In the lime kiln operation process, the quality level of limestone, lime for active substances produced by burning quality has a great influence, so we test for the quality of limestone and analysis should be very seriously, so as to it does not affect the normal operation of lime kiln. But the most important test methods or test methods for chemical analysis is also full analysis. Full analysis of the main test object has a calcium oxide, magnesium oxide, sulfur, phosphorus, silicon oxide and other substances of indicators. Impurities present in the limestone surface of potassium and sodium oxide content is relatively small, however, this small part of the oxide formed by the reaction, or by other compounds are particularly low melting point, which is the formation of the rotary kiln knot circle one of the factors. How much water within the limestone for lime burning did not affect the results. Only when the water is well controlled thermal efficiency of the control to be able to stabilize. More critical in the preheater, to avoid excessive moisture or bottle material to bond phenomenon. From the rotary kiln calcination of limestone surface, the color of the limestone is more, more generally, gray and black, gray, white and scarlet, etc., but in general cognitive among the better physical properties of limestone its surface is usually gray and black colors dominated. From the limestone nature in terms of the amount of calcium in the limestone, and its surface color is not fundamentally linked. Rotary axial rate of decline is still very great, relatively speaking, to 200mm / h or so. Axial movement of the moving range of the rotary kiln, is the need to control the speed. Rolling ring, roller, ring gear, pinion width and the kiln, kiln sealing device, which allows the length of the cylinder axial movement is limited, excessive axial movement range of the failure of these working parts, movement amount is too small, it will also surface in the roller shaft shoulder, so that the kiln changes in temperature can not be free to expand and contract. Since the cylinder in the axial thermal expansion and contraction properties with elongation and retraction, state colder state has a larger elongation is required than roller rolling ring width, otherwise it will cause rolling ring from the tray wheel or bearing surfaces of the serious consequences of inadequate general roller rolling circle wider than the 40 ~ 60mm look, in this case, if the rotary kiln by the gear wheel limitations fixed at a position in the axial rotation, will lead to rolling ring and roller surfaces excessive wear roller surface in a fixed position fray shoulder, rolling ring caught in the surface of the roller shoulder slot. When the rotary kiln stopped overhaul, the kiln body becomes cold, cold shrinkage characteristics are required cylinder retraction. It is caught in the shoulder groove roller rolling ring will move axially in the cylinder or destroy entire rent is made devices. Therefore kiln work, require slow movement up and down the cylinder in the axial direction, avoiding the roller surface caused by uneven wear. In addition, the rotary kiln prevent axial movement of the axial force roller bearings and gear wheels long unilateral force, thereby improving these components work under load. The above article by Henan YuFeng Heavy Machinery  finishing release, reproduced, please indicate the source!