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Forehearth temperature control ahead of molten glass to improve thermal uniformity


Cooling system, only 9 feet long in the first paragraph of the cooling zone temperature drop of not less than 1004, about the glass shape has reached the required temperature, so in the remaining 17 feet long can be carried out in the forehearth temperature control. Temperature adjustment zone in front of a triple thermocouple is installed, measure the liquid glass at the top, middle and bottom temperature, the maximum temperature difference of only 4 ℃. Sunrise feeding amount of a fourth'd flint glass for the 111 tons furnaces. The entrance to the glass in the material temperature is 1240 ℃, using the same principle, in the first cooling zone to lower the temperature as much as possible,[link widoczny dla zalogowanych], hang in the material, temperature regulation in the end zone three triple thermocouple installation, testing have nine data, the maximum temperature difference of 5 ℃. 0 【systems such as the use of terms, the heat index greater than 98.5% homogeneity. 'd An unusual fifth kiln, configuration l6 group ranks machine, the feeding amount more than 180t / d, production of packaging spreading resistance, oh, rain Yan high zirconia refractory in the glass industry applications - materials and Rong Rong binding nature of the material and its application guidelines Iridium refractories in glass experts believe that the formation of mineral stones or hard material can be made of units in contact with the glass, refractory and stable. ccz0. And zrO is encountered in the glass industry the two most stable stones. cr0s for melting refractory or refractory aggressive in the glass fiber component, has been well known. Refractories containing chromium may be applied to a wide variety of anti-corrosion properties of glass composition the strongest material. Unfortunately, the coloring material containing chromium and strong, in some high-end glass products can not be accepted. Although zirconia and porcelain enamels can be used as coloring agents and emulsion cloud, but it itself is not colored glass. In the early forties of this century, to the baking of a financial cut jade mullite zirconia material added to significantly increase the product's life, this is a new melting Alz0s-zr02 si0: (AZS) refractories development starting point. However,[link widoczny dla zalogowanych], when the content of AZS in ZrO around 40, its resistance to erosion of performance reached steady state. 7 spoon, 2 / 62 (at least three zirconia polymorphs, low-temperature phase is monoclinic crystal structure, at about 1O00 ℃ (1382. F) and temperatures above 1000 ℃, and gradually made that crystal Fangxiang. From about 1200 ℃ ~ 2370 (2192. F ~ 4:93 F), this tetragonal phase can exist alone. in the melting point straight at higher temperatures, will find the cubic phase. From a practical point of view, of zirconium oxide or zirconium refractory technology The discussion focused on a tetragonal monoclinic transformation. based on high-temperature x-ray diffraction data of the calculation, indicating that the monoclinic phase to tetragonal phase transition accompanied by volume change of about 3}, this is an unusual change direction of the cold thermal expansion. Figure 1 shows, that through the use of pressure, whether external or internally generated tension, can inhibit the phase transition. This fact explains the observed thermal hysteresis - the phase transition temperature range broad and different. cooling reverse transformation (tetragonal to monoclinic transformation) usually occurs in about 1000 ℃ to 800 ℃ (1832. F ~ 1472. F) between the light in Figure 2Perrier green glass bottle of mineral water, forehearth into \separate heating and control systems. the main channel in front of the two with radiation cooling system in normal operation to control the temperature here. In the end of each temperature control with three thermocouples segment, the middle one is three United thermocouple in the middle of the left and right sides of the forehearth thermocouple placed on a single joint, under normal operating conditions, the five temperature data between the maximum temperature of not more than 5 ℃. forehearth in the use of radiation in the cooling system can make temperature decreased rapidly, thereby making more time for temperature regulation. the same technology to work in the Department can further improve the cooling capacity,[link widoczny dla zalogowanych], increased temperature regulation time, the guillotine from the results cited are to be spelled out by AMC and the principle of pre-thermostat can be achieved after the thermal uniformity. forehearth inlet temperature in the melt is not a fixed value,[link widoczny dla zalogowanych], according to the needs of the set operating conditions. There is no doubt that these improvements can increase the ability to work forehearth to optimize material drop control. However, this also increases the number of variables. to get good material drops, these variables must be controlled, and can be controlled. to better play this superior operating performance, you must use the exact control of computer operations system,[link widoczny dla zalogowanych], computer control system is the principle of AMC and pre thermostat an effective component. (solution Sword Military translated ((GlassIndustry)) 1991 s u-ming of the regular school) n
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