Solution for refractory erosion at the bottom of glass melting furnace
[Zhongbo.com] With the rapid development of the kiln industry, in recent years, some glass factories have frequent leakage events at the bottom of the melting furnace. After the relevant analysis by professionals, the main reason for the leakage is that the bottom structure failed. It effectively prevents the molten glass from drilling upwards and the metal particles are eroded downwards. For this reason, the bottom structure of the tank is required to prevent the molten glass from drilling upward and the metal particles are eroded downward. The two types of erosion of the molten glass from the underside of the brick and the downward drilling of the metal particles are caused by the convection of the free interface layer occurring at the interface of the three substances. Under normal circumstances, these three substances It is a refractory brick - a glass liquid - a bubble or a refractory brick - a glass liquid - a metal. The result of interfacial layer convection exacerbates material exchange at the interface of the three materials and erosion of the refractory material. This is the case with the erosion of refractory bricks, which are well known in the glass surface line. When the glass flows under the fused cast bottom tile, or when the glass passes through the vertical seam of the bottom tile and reacts with the refractory material under the tile, bubbles are generated and these bubbles will quickly rise upwards. Erosion of the fused zirconia corundum above. The tendency of refractory bricks below the bottom of the pool to create bubbles is important. If the tendency of the refractory brick to generate bubbles is large, the amount of upward erosion is also large. The initial point of erosion caused by the bubbles is in the horizontal seam between the layers, such as when the tile is a single layer, in the horizontal seam between the tile and the sealing layer. Erosion in vertical seams is less than horizontal seams. However, since the molten glass flows into the horizontal joint through the vertical joint, the three parts of the bottom tile, the joint and the sealing layer should be combined into a sealed and inseparable whole body, so as to effectively prevent the glass liquid from seeping to Horizontal seams. The three kinds of electrofusion AZS crucibles which are basically the same as the paving brick crystal phase are used as the brick joint between the sealing layer under the paving brick and the embedding paving brick, so that the electrofusion brick, the joint and the sealing layer are sintered at 1250 ° C. The composite layer is resistant to corrosion by the glass. (1) The overall high temperature action process of the composite layer resistant to glass liquid erosion using electrofusion AZS crucible is as follows: (2) When the temperature is below 800 °C, the expansion of AZS ramming material is regularly increased according to the coefficient of expansion coefficient smaller than AZS fused material, and the load is zero and the load is 2 or 4 kg/cm2. Above 800 ° C to 1100 ° C, the AZS crucible exhibits a sintering phenomenon through the glass phase of the electrofused particles. The glass phase has been increasing to more than 1200 °C. Produce double results: The plasticity of the 1AZS ramming material is even more impressive in this temperature zone: 233# fused zirconia corundum contains about 20% glass phase, which is similar to AZS ramming, so it can adhere well between the two; (3) More than 1200 ° CAZS æ£ å‘生 å‘生 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , 1AZS æ£ ç”Ÿ 生 生 生 è¿œ è¿œ 生 生 生 生 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 The plasticity and adhesion of the AZS ramming material between 800 and 1300 °C is favorable for the seam to remain closed under some weak displacements, such as when the reticle is charged; 3 In actual use, after the temperature reaches a steady state, the three AZS crucibles begin to change the ceramic body and gradually merge into one body, so that the entire bottom material is combined into a closed and undividable whole. The glass phase adhesion layer formed between the ramming material and the bottom tile is a reliable intermediate spacer. This chemical structure and mineral structure ensure the symmetry and firmness of the entire bottom structure. It should be specially pointed out that: the ramming material which is different from the paving brick crystal phase and high in Fe2O3 and other impurities, can not be sintered with the paving brick as a composite layer at high temperature and has high foaming rate, and its resistance to glass liquid is upward. The drilling erosion performance is poor. The ramming material was used in a glass factory in Zhejiang and a glass melting furnace in a glass factory in Anhui Province for less than one year. The bottom of the pool was leaked and forced to stop the kiln. Metal particles blasted down Usually, the metal is mixed into the kiln together with the raw materials, the batch materials and the cullet. In special cases, it is also possible to use metal tools to heat the kiln's superstructure and shovel to allow the metal to fall into the bottom of the pool. Therefore, the key to preventing the erosion of metal particles downhole is to use a strong magnet to remove the metal impurities mixed in the batch and the broken glass. At the same time, the zircon brick is added under the bottom sealing layer of the AZS tank. Its function is to react with the glass to form a viscous material that protrudes into the open brick joint and wraps the metal to prevent the glass from penetrating into the lower part and the metal. Drill down. Tops For Kid Girl,Tops For Girls,Girls Boxy Top,Girls Solid Tops SHAOXING NEWTEX IMP.&EXP. CO., LTD , https://www.newtexgarment.com
