High-utilization-ratio reproduced MgO-C brick and manufacturing method thereof

Abstract

The invention discloses a high-utilization-ratio reproduced MgO-C brick which is prepared by the following raw materials by weight percentage: 10-12% of fused magnesite, 1-4% of additive, 25-28% of 5-3mm MgO-C brick reproduction particle, 22-25% of 3-1mm MgO-C brick reproduction particle, 20-22% of 1mm-75-micrometer MgO-C brick reproduction particle, 15-18% of MgO-C brick reproduction micropowder less than or equal to 75 micrometers, 3-5% of graphite powder, and 3.6-4.2% of phenolic resin bonding agent. A manufacturing method of the brick comprises the following steps of (1) raw material sorting and deslagging, (2) twice crushing and magnetic separation, and (3) reproduced brick preparation. Compared with the prior art, the brick has the significant advantages that the problems that the reproduced MgO-C brick is poor in comprehensive performance index and short in service life due to an unreasonable production technology in the existing MgO-C brick reproduction recycling process can be solved, the added waste MgO-C brick can reach 80%, and a utilization ratio is higher.

Description

Technical field [0001] The invention is the field of refractory materials production technology, which involves a high utilization rate regeneration magnesium carbon brick and its manufacturing method. Background technique [0002] my country's steel industry has a huge output, and the use of abandoned magnesium carbon bricks every year reaches more than 10 million tons. The treatment of this material has brought great trouble to steel companies. After changes in the bidding model of refractory materials, with the development of functional overall contracting, the development of functional overall contracting With maturity, the technology of recycling and regeneration of refractory materials is becoming more and more important, and more and more important.Because the refractory material after use is only simply crushed, no refinement is performed, which limits its usage and scope of use, resulting in the low return utilization rate of refractory materials after use, resulting in ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a high utilization rate regenerated magnesia carbon brick and a method for manufacturing a high utilization rate regenerated magnesia carbon brick. Using this method, the amount of waste magnesia carbon brick can reach 80%, the utilization rate is higher, and it can also Solve the problems of poor comprehensive performance index and short service life of recycled magnesia-carbon bricks caused by unreasonable production process in the recycling process of existing magnesia-carbon bricks