Filler for Well Block Introduction:
Filler for well block is produced with magnesia based materials and additive, is characterized by corrosion erosion resistance and easy installation etc. It has good filling effect for ladle well block.
Content source:
http://www.yilongrefractory.com/AllProductOneServlet?id1=2&id=28
E-mail：sales8@chinaelong.com
2017年3月14日星期二
Discussion on Anti - thermal Impact Anti - corrosion Instrument
Magnetic materials on the quality of the refractory material used by the high demand, so a long time, the domestic magnetic materials production plant refractories mainly rely on imports from Japan, Germany, the price is very expensive. In this experiment, high quality raw materials were used as aggregate. Through the test of the formula and the production technology, the heat resisting and anti-erosion performance was excellent, the strength was high, the effect was good and the service life was long.
Selection of raw materials Taking into Refractory company account the use of bearing seat harsh conditions, in addition to the selection of materials with high strength, good thermal shock stability, strong resistance to erosion and other characteristics, but also on the bearing seat deflection core pollution. After repeated comparison, the final choice of mullite) corundum to be developed for the ideal seat material.
Natural mullite is rare and generally synthetic. Because mullite has good high temperature mechanics and high temperature refractory brick for sale thermal performance, the synthesized mullite and its products have high density and purity, low thermal conductivity and thermal expansion coefficient, high temperature structure strength, high temperature creep rate is low, Thermal shock resistance and strong chemical resistance, the advantages of high melting point. Corundum good elasticity, high melting point, at high temperatures with good wear resistance, chemical resistance and volumetric stability, hardness, high refractoriness. In addition, the refractory materials for furnace mullite crystal is generally columnar or prismatic, corundum crystal is generally granular, mullite, corundum according to a certain proportion with the composition of mullite) corundum composite materials, mullite, corundum with the above excellent performance , And the burning of products without pollution, so mullite) corundum bearing seat can meet the requirements of the use of magnetic materials kiln 1.
Tested the development of refractory mullite-based crystal phase, in the design of the formula to make the material to produce more mullite phase, in addition, select a reasonable particle gradation is a very critical step.
The mechanical properties of the refractory lining mullite series have been studied, and the ratio of 75B25 and 25B75 with the best mechanical properties is proposed. It is pointed out that this is due to the fact that the crystal phases are intertwined with each other The Therefore, this test uses the synthesis of mullite and fumed corundum mass ratio of 3B1 as the green aggregate for the test, the use of four-stage pellet gradation, aggregate size and gradation in the first made a lot of experimental research, For comparison, the aggregate was selected as mullite or corundum. The results showed that the thermal shock resistance of the sample was the best when the mass ratio of mullite and corundum was 3B1. After several tests, several sets of more reasonable particle gradation were obtained.
Selection of additives and their additions This test uses A-Al2O3 powder, Suzhou soil, andalusite concentrate powder, zircon powder as an additive. Their role is as follows: Al2O3 micro-powder with the bearing seat in the free SiO2 reaction to form a second mullite, thereby enhancing the product life. This is because the ferrite within the Mn, Zn, Fe and so on will be volatile at high temperatures, easy with the bearing seat in the free SiO2 reaction, resulting in bearing seat corrosion and cracking, which seriously affected the product life, so The design of the formula must be considered to reduce the free SiO2 content to the extent of the reaction with the above substances. In addition, adding A-Al2O3 powder and Suzhou soil can improve the activity of matrix material, improve the forming performance of the green body and improve the sintering reaction ability of the product.
The experimental results show that the retention rate of residual strength increases with the addition of zirconite powder after thermal shock, and decreases more than 5%. The results show that ZrSiO4 has been decomposed and reacted with alumina to form ZrO2 aggregates and mullite, and the ZrO2 aggregates are evenly distributed in the matrix, To the stone network structure. In this way, the dispersion of ZrO2 is formed on the macroscopically, and a strengthened structure of ZrO2 coalescence is formed microscopically to improve the thermal shock resistance of the material.
Selection of raw materials Taking into Refractory company account the use of bearing seat harsh conditions, in addition to the selection of materials with high strength, good thermal shock stability, strong resistance to erosion and other characteristics, but also on the bearing seat deflection core pollution. After repeated comparison, the final choice of mullite) corundum to be developed for the ideal seat material.
Natural mullite is rare and generally synthetic. Because mullite has good high temperature mechanics and high temperature refractory brick for sale thermal performance, the synthesized mullite and its products have high density and purity, low thermal conductivity and thermal expansion coefficient, high temperature structure strength, high temperature creep rate is low, Thermal shock resistance and strong chemical resistance, the advantages of high melting point. Corundum good elasticity, high melting point, at high temperatures with good wear resistance, chemical resistance and volumetric stability, hardness, high refractoriness. In addition, the refractory materials for furnace mullite crystal is generally columnar or prismatic, corundum crystal is generally granular, mullite, corundum according to a certain proportion with the composition of mullite) corundum composite materials, mullite, corundum with the above excellent performance , And the burning of products without pollution, so mullite) corundum bearing seat can meet the requirements of the use of magnetic materials kiln 1.
Tested the development of refractory mullite-based crystal phase, in the design of the formula to make the material to produce more mullite phase, in addition, select a reasonable particle gradation is a very critical step.
The mechanical properties of the refractory lining mullite series have been studied, and the ratio of 75B25 and 25B75 with the best mechanical properties is proposed. It is pointed out that this is due to the fact that the crystal phases are intertwined with each other The Therefore, this test uses the synthesis of mullite and fumed corundum mass ratio of 3B1 as the green aggregate for the test, the use of four-stage pellet gradation, aggregate size and gradation in the first made a lot of experimental research, For comparison, the aggregate was selected as mullite or corundum. The results showed that the thermal shock resistance of the sample was the best when the mass ratio of mullite and corundum was 3B1. After several tests, several sets of more reasonable particle gradation were obtained.
Selection of additives and their additions This test uses A-Al2O3 powder, Suzhou soil, andalusite concentrate powder, zircon powder as an additive. Their role is as follows: Al2O3 micro-powder with the bearing seat in the free SiO2 reaction to form a second mullite, thereby enhancing the product life. This is because the ferrite within the Mn, Zn, Fe and so on will be volatile at high temperatures, easy with the bearing seat in the free SiO2 reaction, resulting in bearing seat corrosion and cracking, which seriously affected the product life, so The design of the formula must be considered to reduce the free SiO2 content to the extent of the reaction with the above substances. In addition, adding A-Al2O3 powder and Suzhou soil can improve the activity of matrix material, improve the forming performance of the green body and improve the sintering reaction ability of the product.
The experimental results show that the retention rate of residual strength increases with the addition of zirconite powder after thermal shock, and decreases more than 5%. The results show that ZrSiO4 has been decomposed and reacted with alumina to form ZrO2 aggregates and mullite, and the ZrO2 aggregates are evenly distributed in the matrix, To the stone network structure. In this way, the dispersion of ZrO2 is formed on the macroscopically, and a strengthened structure of ZrO2 coalescence is formed microscopically to improve the thermal shock resistance of the material.
2017年3月13日星期一
Test Measures for Damage to Refractory Products
Through the coloring, contrast and set the value, can find out a lot of performance, in particular, can easily determine the degree of wear, glass-refractory interface displacement or infiltration boundary position; with a quantitative value of visual inspection. The scanning method is intended to improve the accuracy of the evaluation of corroded specimens, rather than for microstructure studies. In fact, the magnification obtained with a flatbed A4 scanner is limited, which is related to the optical resolution of the device (typically 600 dpi to 120odpi). In accordance with the traditional test method, at the test temperature of the kiln, the finely ground aggressive material acts on the refractory materials for furnace. Use a cement to bond the hollow cylinder to a square bottom parallelepiped. Each of the citrus fills 15 grams of container glass. The less the material. In order to obtain accurate results, the residual glass surface was scanned with the new scanning technique described above without using the old time-consuming planar measurement technique. In addition, surface osmosis was measured.
2) image processing; 3) three-dimensional calibration, the pixel conversion into a dedicated length unit; 4) by contrast and threshold determination and other image processing on the selected area for surface measurement, and then on the Infiltration depth for statistical description. This can be done by making a series of measurements along the impregnation area. Using the standard deviation, the infiltration uniformity can be reliably evaluated, and the average value of the impregnation can be determined.
PRI products in all samples, the remaining glass spray paint surface area. In addition, the infiltration degree is limited to a small part of the wall thickness of citrus. The refractory material in the interface area in contact with the glass is free of erosion, even at the glass level, and the result may be low against the degree of impregnation. The sample was placed in an electric furnace, heated to 1400 ° C in 14 hours, then warmed at 1400 ° C for 24 hours, and then cooled to room temperature in an electric furnace. Choose to simulate the actual operation of the soaking temperature. When measuring, cut the sample in half so that the glass-Refractory company interface is cross-section tested. The cross-sectional area of ??the remaining glass was measured by a reliable quantification of the glass-resistant erosion resistance of the firebrick refractory sale.
The ladle package verifies the technical feasibility of the new alkaline spray filler (NB-GM) for slag line repair, especially the product. Further research is done to find the most suitable product / equipment. The first industrial test is carried out in the laboratory, the spray of MgO-C slag line, the performance is as follows: 110 ℃ after the weight loss B, product 5.5% bulk density porosity at room temperature compressive strength 2.69 / m319% 3lMPa it confirmed This material with ordinary alkaline spray products compared to excellent performance. RH-OB Ventilators Compared to conventional spray products, new materials can reduce the total amount of aluminum (external) and alkaline (internal) materials used for repair. The ongoing tests are mainly focused on the automatic installation of the spray, especially for practical applications. This has the same effect as the conventional material used previously. The first comprehensive test of these first tests was very useful, and they clearly confirmed the improved performance compared to conventional jetting. Two similar studies confirm the future trends of LC-GM (aluminum) and NB-GM (magnesia) materials. The new optimization equipment has the best masonry operation, that is, no dust and rebound, masonry rate of 5 a 6t / h. New products, especially aluminum spinel amorphous material is more suitable for ladle overall masonry.
2) image processing; 3) three-dimensional calibration, the pixel conversion into a dedicated length unit; 4) by contrast and threshold determination and other image processing on the selected area for surface measurement, and then on the Infiltration depth for statistical description. This can be done by making a series of measurements along the impregnation area. Using the standard deviation, the infiltration uniformity can be reliably evaluated, and the average value of the impregnation can be determined.
PRI products in all samples, the remaining glass spray paint surface area. In addition, the infiltration degree is limited to a small part of the wall thickness of citrus. The refractory material in the interface area in contact with the glass is free of erosion, even at the glass level, and the result may be low against the degree of impregnation. The sample was placed in an electric furnace, heated to 1400 ° C in 14 hours, then warmed at 1400 ° C for 24 hours, and then cooled to room temperature in an electric furnace. Choose to simulate the actual operation of the soaking temperature. When measuring, cut the sample in half so that the glass-Refractory company interface is cross-section tested. The cross-sectional area of ??the remaining glass was measured by a reliable quantification of the glass-resistant erosion resistance of the firebrick refractory sale.
The ladle package verifies the technical feasibility of the new alkaline spray filler (NB-GM) for slag line repair, especially the product. Further research is done to find the most suitable product / equipment. The first industrial test is carried out in the laboratory, the spray of MgO-C slag line, the performance is as follows: 110 ℃ after the weight loss B, product 5.5% bulk density porosity at room temperature compressive strength 2.69 / m319% 3lMPa it confirmed This material with ordinary alkaline spray products compared to excellent performance. RH-OB Ventilators Compared to conventional spray products, new materials can reduce the total amount of aluminum (external) and alkaline (internal) materials used for repair. The ongoing tests are mainly focused on the automatic installation of the spray, especially for practical applications. This has the same effect as the conventional material used previously. The first comprehensive test of these first tests was very useful, and they clearly confirmed the improved performance compared to conventional jetting. Two similar studies confirm the future trends of LC-GM (aluminum) and NB-GM (magnesia) materials. The new optimization equipment has the best masonry operation, that is, no dust and rebound, masonry rate of 5 a 6t / h. New products, especially aluminum spinel amorphous material is more suitable for ladle overall masonry.
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