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Although pure refining agent purification can better remove oxidized slag inclusions, and can also remove some gases, it is not thorough and will also bring flux slag inclusions. The degassing unit effect of vacuum treatment is very good, but the effect of removing impurities is very small, and the cost of equipment and operation is expensive. […]
The main reasons for the formation of bubbles on the surface of aluminum rods are insufficient degassing with nitrogen in the molten aluminum furnace or insufficient water content in the refractory material. The solution is to strengthen the degassing refining and reduce the hydrogen content as much as possible. Aluminum smelting furnaces and stationary furnaces should be fully dried after repairs. […]
Ceramic foam filter filtration is the last step in the purification of aluminum melt, and it is particularly important to choose the second generation of ceramic foam filter plates. What needs to be specially pointed out is to prevent the secondary pollution of the melt that may occur during the process of solidification and molding after the aluminum melt leaves the filter box. In this process, the sintered flow tank, front box, distribution plate, and hot cap made of fused silica ceramics with long life, high strength, non-stick aluminum, and good thermal insulation are used, and dehumidified and cleaned in time to eliminate possible pollution sources. , to ensure the cleanliness of the aluminum melt can not be ignored. […]
The State Key Laboratory of Tsinghua University has established a three-dimensional physical model and a two-phase flow model for the filtration mechanism of the ceramic foam filter and carried out simulation calculations, which are very helpful for our research on the filtration and purification of molten aluminum. The process of filtration and purification of molten aluminum by ceramic foam filter plate is very complicated, which is a complex process of high-temperature physical chemistry and metallurgical dynamics. […]
The mechanism of ceramic foam filter plate filtering and purifying aluminum melt The mechanism of ceramic foam filter plate filtering and purifying aluminum melt is generally described as diffusion interception and inertial collision interception or screening mechanism, sedimentary layer, and deep bed filter mechanism. […]
The ceramic foam filter is a porous ceramic product with an open porosity of "80% to 90%", a density of "0.3g/cm3 to 0.6g/cm3", a unique three-dimensional network framework, and a structure of interpenetrating pores […]
At 14:22 on July 24, 2022, China's Long March 5B Yaosan carrier rocket carrying the Wentian experimental module was ignited and launched on time at the Wenchang Space Launch Site in Hainan Province. About 495 seconds later, the Wentian experimental module and the rocket were successfully separat […]
For the preparation of foam ceramics, it is expected to realize the low-cost preparation of foam ceramics. At present, there are few reports at home and abroad on the preparation of foamed ceramics by the aluminum dihydrogen phosphate bonding method. Using aluminum dihydrogen phosphate as a binder to prepare foamed ceramics, the obvious effects of aluminum dihydrogen phosphate content […]
With the continuous development of castable material technology, new types of castable materials continue to emerge, so that the products such as launders, filter boxes, and diverter plates prepared from them are also continuously optimized in terms of thermal insulation, density, and other properties. 3 In recent years, castables The launder has been recognized and widely used in the market, and the production process are relatively simple, so it has a tendency to replace the ceramic fiber material as the leading product in the aluminum casting market. […]
According to the structure, the launder systemis divided into a straight flow slot, an oblique flow slot, a split flow slot, a corner flow slot, a lifting flow slot, etc., and they cooperate with each other to make the induction melting furnaceand the casting platform. The aluminum melt […]
According to different structures, the launder can be divided into direct flow launder system, inclined launder system, shunt launder system, corner launder system, lifting launder system, etc. the launder system with different structures has different positions and functions […]
In response to the problem of nozzle explosion, our company has successively taken measures such as punching holes in the surface of the nozzle plate, far infrared baking of the casting nozzle board, annealing furnace high-temperature baking of the casting nozzle board for a long time, etc., and achieved certain results, but every year to the rainy season, the phenomenon of casting nozzle(also called caster tips) explosion still occurs frequently. […]
Refining agents also called refining fluxes are often used in the purification of aluminum alloy melts. It has the ability to degas, adsorb slag inclusions and float to the liquid level of aluminum solution and form dry slag. […]
It has been proved by experiments that the main factors affecting the quenching temperature of ceramic foam filters are kiln top fire baffle […]
In industrial of aluminum production, taking into account the cost, quality, process and other factors, most manufacturers of alumina ceramic foam filter plate (hereinafter referred to as ceramic foam filters) requirements are often controlled below 1250 °C firing temperature, but the performance o […]