Quartz refractories are one of the most popular heat-resistant materials. Various products are made from them to equip enterprises and laboratories, including crucibles for melting materials. The products withstand heating to high temperatures, retain their strength and integrity of the structure. Due to the property of not releasing impurities in the raw materials, they can be used for melting various alloys to obtain high-quality products.
Quartz refractories include a large group of materials that are united by their characteristics. Each designer should know the classification and properties of these products, which ensures the durability of the materials. In this article we will talk in detail about this issue and give useful tips.
Varieties of quartz products
Such refractories are made of quartz sand, which can be of different fractions, the size of some grains of sand varies from 0.2 to 0.8 mm. In low-quality products, there are individual particles up to 3 mm, which must be removed during preparation. The raw materials themselves can be of natural or artificial origin.
Let's analyze the working classification of quartz-based refractories:
From crushed and rolled sand. In the first case, the grains of sand will be irregular in shape and with sharp edges. Refractories with grains in the form of a sphere are considered to be of the highest quality after high-quality preparation.
By nature, the raw materials are made of artificial and natural sand. Natural is obtained by crushing quartz, which allows you to achieve the desired fraction. The smaller the grains and the smoother their edges, the better the product.
By field of application – for the manufacture of glass, complete set of furnaces and other installations. The purpose of such refractories is regulated by GOST.
This classification is taken into account when selecting components that will work in certain conditions. These requirements are regulated by GOST and are always indicated in the working documentation. They also leave a reserve in case of overheating, which should compensate for errors and shortcomings in the calculations.
