Refractories are generally divided into two types, namely unshaped refractories and shaped refractories. Unshaped refractories are also called castables, which are mixed powder particles composed of a variety of aggregates or aggregates and one or more binders. They must be mixed with one or more liquids and mixed evenly when used. Strong liquidity.
When the ecology is constantly being destroyed, we have begun to pay attention to the requirements of the environment. Everyone knows that refractory bricks are indispensable refractory materials in the metallurgical industry. The refractory bricks used as furnace linings have been subjected to high temperature and chemical erosion for a long time, and the interior is mixed. Large amounts of valuable metals.
It has been proposed to recover this part of valuable metals by beneficiation methods, and certain economic benefits have been achieved. However, after these refractory bricks are sorted, the beneficiation tailings will cause pollution if they are discharged into the environment without treatment. In addition, resources are becoming increasingly scarce, and the recycling of secondary resources can effectively alleviate the pressure on resources. It is not feasible to directly use the tailings containing impurity metals to make bricks. The chlorination volatilization method has advantages in the separation of various types of metals. The chlorination volatilization process is used to treat the tailings, and the impurity metals in the beneficiation tailings are removed to reduce the content to less than 0.1%, and the refractory bricks are recovered The matrix components in the slag will be processed into the raw material for remade bricks. After the treatment, the composition of the roasting slag is the same as that of the raw materials. It can be used as a raw material for refractory brick production, realizing the reuse of secondary resources. It not only solves the resource problem but also does not pollute the environment. It can be described as a new development for the production of refractory bricks. Ideas.
The technological properties of refractory raw materials mainly depend on the mineral composition and particle composition of the raw materials, and are closely related to the manufacturing process of refractory materials. Such properties mainly include particle size and particle size distribution, fineness and specific surface area, plasticity and bonding, drying shrinkage and firing shrinkage, sintering temperature and sintering range, etc.
