Study on Alkaliization of Fused Magnesium and Calcium

Fused magnesia-calcium is made of high-grade natural magnesite, light-burned magnesia powder or other magnesia-containing materials, which are melted in an electric arc furnace and then cooled naturally, so that periclase crystals grow from the melt. big. After cooling, remove the under-melted material on the large block, and the frit is fused magnesia-calcium. The magnesia-aluminum spinel underfired material can be returned to the electric arc furnace. After sorting and grading, the frit can be crushed into the size required by the market. Fused white corundum properties

Due to the use of high-purity raw materials and low silicate impurities, the direct bonding degree of periclase in fused magnesia-calcium is high, and the excellent performance of periclase can be fully exerted. The development direction of fused magnesium calcium is high purity and large crystals. Large crystalline magnesium calcium has excellent crystallization, stable lattice constant and thermal expansion coefficient. Since the slag is eroded from the periclase grain boundary during use, the large crystal fused magnesia-calcium is much more resistant to erosion than the fine-grained periclase of sintered magnesia-calcium. Fused magnesium calcium

Properties of Synthetic Sintered Magnesium-Calcium Sand

The main content of fused magnesium is 95%, 96%, 97%, 98%, and there are two by-products of fused magnesium, one, fused magnesium skin calcium, two, fused magnesium furnace bottom, fused magnesium is generally used For magnesite ore with a content of more than 47%, the main production equipment used in the production of fused magnesium is electric melting furnace. kWh, fused magnesium has high purity, large crystal size, high bulk density, strong slag resistance, and good thermal shock stability. High quality raw materials. Magnesium-aluminum spinel Fused magnesia-calcium is mainly used as a good raw material for high-grade alkaline bricks, carbon-containing products and unshaped refractory materials.

Fused magnesium and calcium return to alkali (return to frost) will cause great harm to products, such as the discoloration of magnesite tiles, the embrittlement of greenhouse supports, and magnesite. The strength of the manhole cover decreases, etc., all of which are directly related to the return of alkali (return to frost) of magnesite products. Through analysis and actual testing, the main reasons for the return of alkali (return to frost) of fused magnesium-calcium products are as follows: 1: fused magnesium The reason for calcium, the high caustic soda in magnesium oxide firstly causes the magnesium oxide content to be too low, the solidification speed is too fast, and the magnesite product crystal lattice and dry to form hoarfrost. 3: The reason for the glass fiber cloth, because the customer uses the high alkali glass fiber cloth, the high alkali glass fiber cloth is very harmful, causing the magnesite products to return to alkali (return to frost), not to mention the service life of the magnesite products It has a great influence. Due to the high alkali content of the high alkali glass fiber cloth, the lattice structure inside the magnesite product is not fully formed, and the strength and durability are greatly affected. After a few years, the electrofusion of the high alkali glass fiber cloth The embrittlement of magnesium and calcium products can reach surprising levels, and some people have done experiments. The partition board made of high alkali glass fiber cloth (there was basically no obvious return to halogen and alkali (return to frost) in the past few years) can be penetrated with fingers after about 4 years.