Unshaped refractories are aggregates and powders, binders or admixtures mixed with a certain percentage of the mixture, can be applied directly or with appropriate liquid preparation and use. That is, the material is a non-calcined new refractory material, the refractory resistance of not less than 1580 ° C
Unshaped refractory variety, by the production methods and methods of use can be divided into concrete, castables, plastic, Ramming material, gunning material, projection material, spreading material, dry ramming material, fire clay material, various Make up the charge (bitumen combined with noodles fill material, Martin sand, etc.) also belong to the unscientific column. Although there are many types of unfold products, their typical methods of production can be classified into the following three main forms:
1. Early appearance of concrete technology, it is a non-stereotypes products stereotypes products, some parts of the hot furnace such as soaking furnace furnace top furnace wall, the rotary kiln before and after the mouth ring, cutting slope, the wall of the discharge chamber And so on, are designed to make a large masonry (heating block top block weight 3-4 tons) made of concrete. Concrete cattle production method is cast material into the model, vibration molding, mold release after heat treatment, provided to the user in addition to block large, weight, the use of machine brick and there is no essential difference. This castable used in the manufacturer's water consumption less than 10% less than the on-site pouring, processing quality is good, and the quality is stable. As the brick, heavy, the scene must have lifting equipment, as long as the site can be hoisted construction, concrete should be used as far as possible, can also be made smaller body, a few people can carry on the move on the line. Concrete does not require users to do a special heat treatment, this instrument makes sense.
2. Castable castable is refractories plant to provide raw materials and ingredients program, on-site processing, with a vibrating rod dense, after curing to be heat treatment, due to the quality of the site conditions are not stable, but the integrity of castables better than concrete, the quality of castables Crucial water and heat treatment are not as good as two aspects of concrete, raw material consumption of concrete more than 5% to 8%.
3. Plastic material from the production methods that plastic is between the concrete and castables. It is made of refractory material plant "castable" made of plastic mud, ingredients with retarders, plastic bags, on-site construction and heat treatment. Plastic applied on the biggest problem is to knot Jiebian easy to peel off, improper dosage of retarder or bad plastic easy to harden caking.
