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Silicon micro powder is not as hard to move as industrial equipment, because it is a agglomerate particle. In the process of transportation, measures such as packaging, safety protection and fixation should be taken. Otherwise, once leakage and other problems occur in the whole process of transportation, it will cause greater damage to rights and interests. Now let's talk about the common problems when transporting this product. Understand the physical and organic chemical characteristics of the goods before transportation. In summer, the car shall be equipped with awning poles and awnings. Ventilation and shading shall be provided, especially to avoid sunlight. When loading, unloading and handling, handle with care. Do not drop, drag, press or rub. Do not damage the packaging containers. Pay attention to ensure that the other party is in place.
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The magnetic separation equipment removes iron according to the chemical properties of iron. The magnetic separation equipment has two methods, dry separation and wet separation, each of which has its own advantages. When it is used, the composition of raw quartz sand should be measured as far as possible. If the raw quartz sand contains hematite, limonite, biotite and other weak magnetic residues with intergrowth particles in it, the wet separation is the only way, However, the disadvantages of wet separation are large power consumption, easily damaged materials, large water demand for production, and high operation and maintenance costs. If the above residues are not available, dry separation can be used. Compared with wet separation, the cost and maintenance are extremely low.
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Characteristics of light calcium carbonate Calcium carbonate is non irritating, odorless, white, dry, carboxyl free, soft powder, and its strength is Mocha No. 3. Light calcium carbonate is a chemical production of calcium carbonate, with an average particle size of 0-6um and a glossiness of more than 95%, which is usually used as an electrostatic powder of calcium carbonate. Heavy calcium carbonate is made of natural dolomite, limestone and other raw materials by mechanical equipment. Because of the variety of equipment, its application in electrostatic powder is limited. It plays a framing role in the electrostatic powder. Their addition can improve the thickness of the coating, corrosion resistance and durability of its coating.
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There are three key types of calcium carbonate: high quality calcium carbonate and light quality calcium carbonate. Heavy calcium carbonate is produced by crushing natural dolomite, limestone, limestone, pearl shell, etc. immediately with equipment. Light calcium, also known as sedimentary calcium carbonate, is produced by calcining raw materials such as dolomite to produce lime powder, adding water to digest and absorb lime powder to form mature lime, and then filling carbon dioxide to carbonize and deposit, which is dried, dried and crushed. Or, first, dilute hydrochloric acid and calcium chloride are used to carry out the double decomposition reaction to form calcium carbonate deposits, and then they are prepared by dehydration, drying and crushing. Because the production method is different, light calcium has a large deposition volume and looks light. In fact, the relative density of the two is not very different.
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Some technical indicators of calcium carbonate include mesh size, whiteness and calcium carbonate content. Screen mesh number: the mesh number refers to the total number of holes on the stainless steel screen in the total area. The larger the mesh number, the smaller the particle size, and the required processing technology will be more complicated. Generally, the filler with large mesh size needs surface treatment to enhance its dispersion. Whiteness: Because pure calcium carbonate is milky white, the higher the content of calcium carbonate, the whiter the products will be, and the less miscellaneous. Ferrite and silicon will make the products yellow and dark. Generally speaking, when the whiteness is higher than 90%, calcium carbonate can be used as an opalescent dye for plastics, but many manufacturers are not satisfied with the 90% specification.
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The flame retardancy of quartz sand can be indicated by its sintering point, that is, the temperature at which the test material is gradually melted and sintered. Sintering point refers to the temperature at which the surface of raw sand particles or the mixture between sand particles gradually melts. The sintering point test can be carried out in various continuous high temperature tubular heating furnaces, and the temperature should be controlled to 1350 ℃. Before the test, the electric furnace is heated to the predetermined temperature, and then the dried test materials are put into the calcined porcelain boat. The temperature of gradual test can be determined from 1000 ℃ or based on practical experience. During the whole process of the test, the porcelain boat equipped with test materials gradually pushed the furnace, insulated for 5min at the required temperature, and then gradually pulled the porcelain boat out of the furnace.
