A kind of high utilization ratio recycled magnesia carbon brick and its manufacturing method

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 belongs to the technical field of refractory material production technology, and in particular relates to a regenerated magnesia-carbon brick with high utilization rate and a manufacturing method thereof. Background technique [0002] The output of my country's iron and steel industry is huge, and the waste magnesia-carbon bricks used every year reach more than 10 million tons. The processing of this material has brought great troubles to iron and steel enterprises. And mature, the recycling and recycling technology of refractory materials is becoming more and more urgent and important. Since the used refractory materials are only simply crushed without finishing, their usage and range of use are limited, resulting in a low return utilization rate of used refractory materials, resulting in a large waste of resources and destroying the cleanliness of the factory area health. Therefore, it is of great significance to study the recycling of...

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