Magnesia chrome brick manufacturers have found that some refractory companies have low profit margins, and some products have profit margins of only 1%, while some large refractory companies have profit margins of 5%-10 %, which reflects the hot and cold market demand for refractory products with different technical content. Some companies also said that some products are currently selling at a loss, mainly because some companies have a large inventory and have to sell at a loss in order to clear the inventory at the end of the year. "Our industry is not something that you get snapped up immediately at a loss. It is incomparable with eggs in the supermarket." A salesperson from an unshaped refractory company said, "The price of eggs in the supermarket has dropped. A group of grandparents lined up to buy. But refractory materials are not good, the downstream market demand is not enough, the supply exceeds demand, and the product price is low and I have not bought it." Magnesia brick

The characteristics of this kind of brick are that the raw materials are pure, the firing temperature is high, the high temperature phases such as periclase and spinel are directly combined, and the low melting phases such as silicate are distributed in islands. Therefore, the high temperature of the brick is significantly increased. Strength and slag resistance. The production process of fired magnesia chrome bricks is roughly similar to that of magnesia bricks. In order to eliminate the fine powder produced by MgO, Cr2O3, Al2O3 or calcination of chromium ore-magnesia co-milled compacts during the sintering process of bricks, the method of making bricks with coarse magnesia particles is an effective measure to eliminate the loose effect . Compared with ordinary magnesia-chrome bricks, the magnesia-chrome bricks made by this method have lower porosity, higher compressive strength, load softening temperature and flexural strength. The magnesia-chrome bricks made of chrome ore-magnesite powder compacts and high-temperature-calcined synthetic magnesia-chrome sand have better slag resistance and high-temperature strength than other magnesia-chrome bricks.

For the glass furnace of Liaoning magnesia chrome brick, if you want to reach the design service life or prevent the glass solution from being polluted, it is necessary to have a comprehensive understanding of the appearance and internal quality of fused bricks, and understand the performance and electrical characteristics of fused bricks. Weaknesses of fused bricks: which parts can be flawed and which parts must be perfect. The following is a brief introduction to the special parts of the pool wall.

1. Appearance quality. The corner bricks, kiln chopped bricks, bubble bricks, and liquid hole bricks on the wall of the pool are generally 41#. The gap between the adjacent bricks must be strictly assembled, and the gap will speed up the erosion of the glass solution on the bricks. The gap should not be larger than 0.5mm. Shrinkage holes are not allowed at the bottom of the bricks. The surface pores larger than ￠2mm are not allowed to exceed twelve per cubic meter. The color of the brick body is white and yellow, and bubbling and flowing liquid holes are not allowed. There are cracks, and no defects are allowed within 300mm of the top of the pool wall. These requirements are very critical. Failure to do so will affect the service life of magnesia-chrome bricks.