Refractory material for petrochemical furnace

(1) Refractory materials for carbon black fuel furnace. In order to improve the production efficiency and the reaction degree, the reaction temperature must be increased in order to improve the production efficiency and the reaction temperature. If you want to produce hard carbon black, you must also improve the reaction temperature. In particular, the production of long life, rolling wear small tires will need a more rigid carbon black, the reaction temperature of 2000 ~ 2100, which requires more than the refractory.

(2) Slag gasification device. It is well known that the gas industry is widely used in refractories. The operating temperature and pressure of the refractory material used in the gasification equipment are extremely harsh, and the operation temperature and pressure are high: the slag belongs to the acid slag which has very strong corrosion resistance. At the same time, there is a highly corrosive gas. Refractory materials used for high resistance to acid slag corrosion can be used to obtain high life.

(3) The oil cracking unit: the operating conditions in the catalytic cracking unit are the most demanding operating conditions, including high temperature and high pressure. The refractory lining of the catalytic cracking unit is required to have high wear resistance and low thermal conductivity so that the two contradictory properties. Because of the high wear resistance generally requires high density, and low heat conduction rate generally requires a lower density, so it is needed to introduce the two properties of the material and its related problems.

This chapter mainly discusses and analyzes the fire resistance of these special applications in the petrochemical industry, and provides the basis for the development and application of the relevant refractories.

Brief introduction of refractories for blast furnace iron making

Blast furnace is the drum into the air the coke burning and reduction shaft furnace of ore smelting, is in high temperature and reducing atmosphere continuous iron making thermal equipment. In the last 20 years, the development of the global iron making technology is very fast, and the blast furnace is becoming more and faster. Nowadays, the life of blast furnace has been more than 15 years, the longest of which has reached more than 20 years. A new generation of service life of blast furnace will reach more than 20 years. With the furnace body design more reasonable, blast furnacerefractory materials are also continuously being developed and applied. Blast furnace lining refractory material needs more than any other process in the production of iron and steel. Refractory material to withstand high temperature thermal shock effect, wear and erosion of furnace charge, gas, the erosion of alkali metal, bosh following by molten iron and slag erosion, erosion. Therefore the problem of lining must be comprehensive consideration of various factors, selected according to the different parts of the cooling system of the furnace body and the different materials of the refractory material. In short, the selection of new high quality refractory materials is one of the important measures to prolong the life of the blast furnace.

The furnace body comprises a furnace body, bosh, belly, throat, hearth and bottom parts etc… The furnace with air, slag hole, taphole, cooling system and gas collector and charging device etc… Development trend of blast furnace refractorymaterials

Preparation and properties of refractory materials is an important aspect of the improvement of blast furnace lining system. With the increase in production of blast furnace, furnace lining refractory system should be able to withstand the severe wear. Lining refractory system is mainly to prevent high temperature chemical erosion and carbon bricks and iron directly contact erosion or melting loss. In any production conditions, to prevent lining cracks is the first step in the establishment of the good effect of lining system, the high temperature gradient and no enough space for expansion are two main reasons that cause cracks, reasonable preparation lining can prevent or reduce the cracks.