refractory

The unshaped refractory material is composed of regenerated magnesia-chrome granule and powder, binder or other admixture, and can be used directly or added with appropriate liquid after blending. That is, the material is not a new type of refractory fire, the refractoriness of not less than 1580 ° C.

A variety of unshaped refractory material, produced by the production methods and methods can be divided into concrete, castable, plastic, ramming material, gunning materials, projecting materials, coating materials, dry ramming material, fire clay material, Complement charge (asphalt combined with large surface charge, Martin sand, etc.) also belong to the list is not stereotypes. Although there are many names of unshaped products, the typical production methods of waste Mg-Al spinel tiles can be classified into the following three main forms:

1. "Concrete" powered by. Concrete technology thrown earlier, it is not stereotypes products in the stereotypes of products, some parts of the furnace, such as hot stove top furnace wall, rotary kiln before and after the mouth ring, cutting slope, unloading chamber wall And so on, all town to design large masonry (reheating furnace top block weight 3-4 tons) made of concrete. Concrete bovine production method is cast into the model of scrap magnesia chrome brick, vibration molding, after stripping heat treatment, to provide users in addition to block large, weight, the use of the machine and the brick is no essential difference. This production in the factory to complete the castable pouring water than the scene less than 10%, processing quality, and the quality of chaos. As the brick big, heavy, lifting lifting equipment to be on-site, as long as the site can be hoisting construction, should try to use concrete, can also be made smaller shape, a few people can carry on the line. Concrete does not require users to do special heat treatment, instrument this point is very meaningful.

2. Castable. Casting is a refractory plant to provide raw materials and ingredients program of scrap mafic bricks, on-site processing, with vibrating rods compacted, after curing to be heat treatment, because the premise is not limited by the quality of the site chaos, but the overall castability better than concrete, The quality of castables is critical to water consumption and heat treatment are not as good as the two aspects of concrete, raw material consumption than concrete 5% to 8%.

3. Can be plastic. From the production method that can be between the plastic and castables in the middle of concrete. It consists of refractory plant first "castable" made of plastic slime, ingredients in retarder, by the plastic bag, in the field of construction and heat treatment. Can be applied to the plastic in the biggest problem is easy to pick up the stubble at the peel off, the amount of retarder improper or bad plastic easy to harden the agglomeration of waste refractory brick.