China Quality News Network News Recently, the website of Zibo City Market Supervision Administration released the "Publicity of the First Batch of Product Quality Supervision and Spot Checking in 2019". According to the information, 19 batches of refractory products produced by 19 enterprises in the city were sampled. The 19 batches of products produced by 19 companies were all qualified.

This spot check is based on YB/T007 "Aluminum carbon refractory products for continuous casting", the self-declared corporate standards and the product quality requirements, and the aluminum oxide for refractory products for continuous casting. Carbon, bulk density, apparent porosity, normal temperature compressive strength, room temperature flexural strength, zirconium dioxide, thermal shock resistance and other items were examined.