It can be prepared by directly crushing natural calcite, limestone, chalk, shell, etc. by mechanical methods (using Raymond mill or other high-pressure mill). Because the sedimentation volume of heavy Calcium Carbonate is smaller than that of light calcium carbonate, it is called heavy calcium carbonate.
Heavy calcium carbonate is abbreviated as heavy calcium. It uses high-quality limestone as raw material and is processed into white powder by a lime mill. Its main component is CaCO3. Heavy calcium has the characteristics of high whiteness, good purity, soft hue and stable chemical composition. Heavy calcium is usually used as a filler. It is widely used in daily chemical industries such as artificial floor tiles, rubber, plastics, papermaking, coatings, paints, inks, cables, construction supplies, food, medicine, textiles, feed, toothpaste, etc. Increase the volume of products and reduce production costs. Used in rubber, it can increase the volume of the rubber, improve the processability of the rubber, play a semi-reinforcing or reinforcing role, and can adjust the hardness of the rubber.
Heavy Calcium Carbonate,Heavy Calcium Carbonate,Calcium Carbonate Heavy/Light Powder,CaCo3 Henan Shunbang Chemical Industry CO.,Ltd , https://www.pvcresinchem.com
Analysis excavator gas control valve common fault
W4-60C type excavator brake air system, equipped with gas control valve between the pump and the reservoir, its main function is to separate oil and water in compressed air, filter the dust and impurities in the compressed air to prevent compression in the reservoir Air back to the pump, to ensure gas pressure stability in the 0.490-0.637MPa range, the maximum pressure does not exceed 0.784MPa. The following faults often occur during use: 1. The pressure regulating valve is damaged due to the pressure of the diaphragm, and the diaphragm 6 is a rubber product. Due to the frequent punching of the pressure, repeated arching and resetting, the gas, moisture Of the corrosion, so often make the diaphragm damage, this is the most prone to failure of the control valve. After the diaphragm is damaged, the compressed gas from the air pump enters the upper part of the pressure regulating valve through the diaphragm without entering the gas storage cylinder, so that the pressure of the gas storage cylinder can not rise. At this point pressure regulator valve temperature is easy to increase, the brake system barometer shows the lack of pressure, pressure regulator valve can be heard at the leak sound. 2, the control valve housing rupture The valve housing by the upper, middle and lower parts, respectively, with screws. As the shell made of aluminum, in the decomposition or combination, if the demolition, install the screw method is improper, easy to make the shell rupture. Faults in the demolition, install the screw, should be diagonally and in multiple tightening or loosening, so that the shell according to the force on the face ç» consistent, to prevent damage due to uneven force.