ed hardy clothing Novel α-alumina cooling of _313

Novel α-alumina of cooling equipment

Field allows the length of the body (the actual transfer length) and the next feeding amount ITI26 ・ light metal selected 2000 2 n = 4r/mln ~, s - spiral blade pitch,[link widoczny dla zalogowanych], in this case to take sO, 3m; - material filling factor Select = 0.25; a material density, cf AO3 clinker kiln dust density select p = 1,25 t / m ~; c - material tilt factor, in this case the level of transmission. Choose c = 1. 2.3 materials transported from the cooling conditions according to the site to determine L L = 6m can be seen from the above calculations, the helical blade diameter of only 0,[link widoczny dla zalogowanych],185 m to meet the transportation requirements, but taking into account the cooling effect of the local real based. The main purpose is to improve the cooling effect of secondary transmission, and the next feeding amount certain, the speed in certain circumstances, to increase the intensity of heat exchange. From the above equation (1) can be seen,[link widoczny dla zalogowanych], reducing the amount of fill material. Increase the helical blade diameter D u can be the type of material in the bottom of the tank in the thin layer of state, is conducive to the material and heat exchange between the cooling water. The value of this re-(take = 0.05) and then ask spiral blade diameter D. The Korea _036 adjusted, to take this design D = 0.5m. 3 Conclusion overhaul the program by the Central Plains plant design and manufacture of aluminum, respectively, since 1993 in Jiaozuo, Xinxiang two input use, continuous cooling machine proved good performance. Can be material from the kiln temperature of 1200 \will significantly reduce their volume. In my factory under the feeding amount is 55t / h of the ~ ~ 4000mm of the park drum machine for cooling down, if alternative helical structure, and its diameter is only ~ 1500mm to spiral. References (1 ] alumina production equipment [z] China Nonferrous Metals Industry Corporation .1990 (2] Chemical Industrial Furnace Design Manual [z] of Chemical Industry Press, 1988 (Editor Du Yajun】【on the next page 19) is sufficient to achieve the medium and low voltage Gate valve and seal tightly than the pressure force. 43 from the eccentric appropriate gate gate tight tight body. actually only played the role of gate tight start line in Figure 4n near the P point of the very short short; expansion plan is similar to wedge-shaped curve. The slope is a change of lead angle. practical design will be the role of the eccentric clamping the most reasonable point of P range of about 3-5mm is sufficient compensation for the work of line segments used. eccentricity should be selected so that the eccentric spherical curve in the other into the curve - the approximate Archimedean spiral curve; so tight position when the eccentric gate moves, ranging from spherical contact points on both sides of the radius of curvature p, can still forward their equivalent, with a fixed sealing seat maintain the compression state. without losing the sealing performance of the valve,[link widoczny dla zalogowanych], sealing the so-called self-compensation performance. 5 Conclusion (1) Industrial valves alumina short life, mainly due to the valve erosion and fouling. common standard valves , due to structure and materials can not meet the requirements of production process, resulting in frequent maintenance and replacement, seriously affected the normal production. explore the applicability of the new valves in the alumina industry is facing issues over the years. (2) To meet the alumina industry valve of the technical requirements, common standards to overcome the existing problems and valve defects, introduced a new type of valve - double eccentric semi-ball valve. which is characterized by circulation performance, reliable and durable seal, open the quick light, wear self-compensation . especially in the removal of scale has its unique advantages. won the national patent (ZL97241180.1), for the alumina industry to provide a better process control valves. (3) Great Wall Aluminum Corporation five alumina plant desilication workshop process. BQ341H half ball to replace the original with the use of the valve, to facilitate the process operation. life extended to one month from 3 to 4 months. Shandong Aluminum Company plant species of the second separation of the three alumina plant material positions, the former with the valve 2 to 3 months to leak, use double eccentric semi-ball, use the cycle extended to 8 months. to reduce the operating frequency of use of replacement, while increasing economic efficiency. (4) double eccentric semi-ball valve is suitable for different media under mineral processing conditions of the new valve technology,[link widoczny dla zalogowanych], the development of the field is still new. Germany, the United States, China and so the new valve - Eccentric (half) valve to the market . can be expected that the new valve will be more widely used. References: [】】 drag on the alumina industry with the A light metal mouth] 1994.2 [2] I, URGIOmbhVAWv Ⅲ .1989 [3] Amen Design Manual [z] Machinery Industry Press, 1982 [4] eccentric ball valve, valve dictionary, 1996.3 (Editor Du Yajun)

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