What is natural refractory stone？

      refractory materials are resource-based industries, raw materials are the basis of the product, natural mineral raw materials is the main body of refractory raw materials. Natural refractory mineral raw materials of a wide variety, such as: magnesite, high alumina bauxite, dolomite, zircon, chromite, lamproite family minerals, silica, graphite, olivine, chlorite, etc.. The general chemical mineral composition of natural raw materials is unstable, impurities, performance fluctuations, can not be used directly as refractory raw materials, to be graded, beneficiation and purification, calcination or electrofusion and other processing processes can be used to produce refractory materials. Only a few natural refractory mineral raw materials in nature to a more pure mineral presence, impurity minerals, and does not contain or contain a small amount (about 5%) of crystalline water, such as: silica, chlorite, olivine, red pillar, etc., can be directly produced refractory products. These natural mineral raw materials in high temperature volume does not shrink, do not expand, or shrinkage, expansion is not large, stable performance.

What is natural refractory stone？

      Some years ago, Jiangxi, Fujian, Guangdong and other places, the large siliceous sandstone, sericite quartz schist and silica quartz schist, commonly known as bubble sandstone, white bubble stone, etc., the use of cutting, chiseling and grinding processes, processed into the required shape, and then directly masonry in the local some small high aluminum, small electric furnace, iron furnace, lime kiln, cement kiln and other thermal equipment used, the effect is good.

      The natural refractory stone is divided into two kinds of silica sandstone and quartz schist abroad. The silica sandstone in the United States is composed of 0.1~0.15mm silica sand, combined by colloidal silicon oxide. The quartz schist of Germany is composed of microscopic thin layers of sericite and fine-grained quartz layers into interlayer, in a remarkable sheet-like structure. According to the literature, chlorite and olivine are also cut into the required shapes and used directly in masonry on the kiln.

      Our country does not pay enough attention to the production and use of natural refractory stone, it is recommended that the relevant departments organize research on the mining, processing and use of natural refractory stone to be scientific and reasonable. It is also recommended to develop national standards for refractory products. Especially now the stone processing equipment is very surprise, natural refractory stone should have a certain market prospect.

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