4 Casting Methods Of Fused Cast AZS Block

Casting refers to a manufacturing process by which the melt is poured into a mold after raw materials are melted in the electric furnaces, which contains a hollow cavity of the desired shape, and then allowed to solidify. Although the process is short, it is a complex process and every step is related to the quality of the final products.

There are 4 commonly used casting methods of fused cast AZS, including normal casting(PT), Tilt casting(QX), Reinforced casting(ZWS) and Void-free casting(WS).

It adopts general casting risers and the riser will be removed in the hot state. The shrinkage cavity in brick is located under the casting scar, due to volume shrinkage from liquid-solid transform and rapid solidification of a casting. The feasible limits of cavity can be evaluated and indicated by the volume-weight testing of blocks in-situ according to the technical specifications.

PT fused cast AZS block is always cheap and used in the areas with no serious corrosion such as top crown, superstructure and feeder channel. The surface with scars should not be used as the working surface.

In this method, the mold is inclined at an angle. The shrinkage cavity in brick disperses at one end of the brick and a completely dense zone forms at another end. The feasible limits of cavity can be evaluated and indicated by the volume-weight testing of blocks in-situ according to the technical specifications. Meanwhile, blocks which height less than 900mm are not suitable to be manufactured by this process.

QX fused cast AZS block is generally used in the sidewall of glass furnaces.

Similar to WS, merely a few shrinkage voids remain in upper part of the body. A little part of the cavity will be remained at the end of the block after the header cutting. Block evaluation in-situ begins from the determination for the feasible size and deepness of cavity remainder at first and then to the volume-weight testing of blocks according to the technical specifications.

ZWS fused cast AZS block is always used in the sidewall of glass furnaces.

Additional liquid from the header fills sufficiently into a casting and the header is then cut off, so no shrinkage cavity exists in brick body. Block evaluation in-situ includes the acceptance or rejection for somewhat trace of cavity remainder which perhaps appeared and the volume-weight testing of blocks according to technical specifications.

WS fused cast AZS block has a wide application in the glass furnaces such as sidewall, tank bottom, feeder channel, doghouse, throat, dam wall, electrode wall and corner wall.

Sunrise is a refractory material supplier from Zhengzhou, China, supplying high quality fused cast AZS blocks manufacturing in different casting methods (PT, QX, ZWS and WS). Sunrise will be present at Vitrum 2015 in Milan, Italy from October 6, 2015 to October 9, 2015. Visit us at Booth U13, Hall 22.