40-70 mesh sand supply Orb

Sarah describes a sand Baozhu sand production process? Bauxite select high-quality raw materials, home electric arc furnace to melt when the molten liquid from flowing out of the furnace, with a flow of compressed air to blow out cooled to obtain spherical or close spherical particles, smooth surface. Second, the LFC active sand limitations with LFC continues to rise, how to reduce the production cost of castings, improve casting yield and improve the quality of the casting surface, each casting companies continue to pursue the goal. As we all know, to solve such problems, the sand selection is critical. Traditionally, people use sand, but because of its own limitations, the following problems 1) shakeout process for distributing a lot of silicon dust, resulting in the workshop environment is very poor, poor working conditions, increase the number of waste sand, effectively reducing sand, sand and Di reuse rate is low, the increase in production costs. 2) Budget silica sand refractoriness low, poor mobility, poor permeability, in the casting process will produce a lot of casting defects, such as sand, porosity, scarring, rat tail, etc., especially in the steel casting more evident . Benefit from a comprehensive consideration, the use of silica sand in EPC, and not conducive to environmental protection, long-term use will increase production costs. Third, the LFC new sand - Pearl of sand production, the advantages of using Baozhu sand bottom sand to replace the original (dry quartz sand, silica sand), can reduce production costs, improve casting dimensional accuracy, improved surface quality. Excellent Performance Overview now affect the quality of castings and Sarah sand several elements are as follows: 1, refractoriness refractoriness to characterize the object's resistance to high temperatures without melting performance without load. If insufficient refractoriness, will form sticky sand, sand casting defects, post-clean-up difficult. Baozhu sand is the main component of an alumina (Al2O3), its phase component is mullite and corundum, theoretically refractoriness at 1820 ℃ -1890 ℃, I am in the National Refractories laboratory testing orb sand refractoriness ≥1790 ℃. The main component of quartz sand is silicon dioxide (Si02), which refractoriness between 1670 ℃ and 1700 ℃. Also there will be a variety of crystal quartz sand appear at different temperatures, resulting in lower sand casting process again refractoriness. Practice shows that Baozhu sand can significantly reduce the mechanical and chemical bonding sand, sand greatly reduce labor intensity, and easy to produce sand, red sand, porosity and other defects. For example: Jilin innovation LFC Equipment Co., Ltd. of high manganese steel castings, before using the orb sand, sticky sand, sand is very serious, every time takes a lot of manpower and resources to clean up the surface of the casting, grinding work, both increases the production costs of the casting, the casting surface quality also caused defects in the use of sand Baozhu have eliminated such casting defects. Further savings of nearly 6% of production costs. Baozhu sand refractoriness comparable with chromium ore, is now widely used in the original cast chromium ore production. 2, Sarah liquidity sand type spherical particles, liquidity is very good, easy to tight time modeling, and can maintain good ventilation, and quartz and magnesium olivine sand are polygon sand, poor liquidity. For example, a Power Equipment Co., Ltd. Chengdu engine block, the original use of magnesium olivine sand as filled with sand, because the polygon sand illiquid, often rat tail, scars and other defects. After using Orb sand this phenomenon has been markedly improved, more cost rate of 5%. 3, air permeability? Permeability depends sand sand grain type size, particle size distribution, and the type of binder and other factors. Filling Process EPC, if the sand poor ventilation, a lot of gas inside due to strong heat radiation generated can not be discharged in order to choke the fire phenomenon will occur, resulting in porosity in the casting, cold shut, pouring inadequate defects, or even scrapped. Quartz and magnesium olive sand sand are polygons, its poor ventilation, while Sarah and magnesium olive sand sand sand are polygons, its poor ventilation, and Sarah spherical sand particles and uniform particle size distribution with good air permeability, which can effectively avoid such casting defects. For example, Xinjiang Korla Kaiyuan steel plant, in the production of high wear-resistant steel castings Meng, has used quartz sand and magnesium olivine sand, but the effect is not ideal, because the two sand poor ventilation, foam models due to strong gas heat radiation generated not ranked poor, resulting in a stoma, scarring, burning less, casting surface defects such as a large amount of scarring after the selection of Sarah dry sand molding sand do to solve this problem, the yield was increased by 7%. 4, pouring temperature coefficient of thermal expansion of the casting process, due to thermal expansion will cause trace sand sand size change, thereby affecting the precision casting size. CTE sand is too large, it will result in sand, scarring, rat tail and other casting defects. Baozhu sand thermal expansion coefficient is extremely small, in the casting process is almost no swelling phenomenon, greatly improving the accuracy of the casting, its performance can be comparable with zircon sand. ??? 5, recycling rates since the quartz sand and magnesium olivine sand is a polygon, low intensity, shape and sand in the sand breakable process, not only will have a lot of dust, contaminating the environment, but also have a lot of waste sand, leading sand is not durable and low recovery rate, according to statistics, the amount of waste sand casting each cleared is around 5%. The spherical sand Baozhu sand, its high strength, not easy to break, can greatly reduce production costs, reduce the amount of waste sand, increasing the proportion of the effective reuse of sand, thereby greatly reducing the amount of sand loss.