Tapping channel casting material with good oxidation resistance

Abstract

The invention provides a tapping channel casting material with good oxidation resistance. The casting material comprises the following raw materials in percentage by mass: 60 to 70 percent of white corundum granules with a diameter of 0 to 8 millimeters, 2 to 8 percent of silicon carbide with a diameter of 0 to 1 millimeter, 10 to 16 percent of fine silicon carbide powder of 200 to 325 meshes, 2 to 6 percent of Al2O3 super-micro powder, 2 to 4 percent of SiO2 super-micro powder, 2 to 4 percent of asphalt, 2 to 4 percent of aluminate cement, 1 to 2 percent of clay powder, 1 to 3 percent of metal nitride, and 0.05 to 0.2 percent of polycarboxylic acid water reducing agent. The tapping channel casting material has the advantages that: the water consumption of the casting material is obviously reduced, the porosity of the casting material is reduced, the compactness and the strength of the casting material are improved, the flowing property of the casting material is improved, and the constructability of the casting material is improved; the casting material has excellent oxidation resistance and corrosion resistance to molten slag and molten iron; and the service life of the casting material is greatly improved.

Description

technical field [0001] The invention relates to an unshaped refractory material for a tapping channel of a blast furnace in the metallurgical industry, in particular to a refractory castable for a tapping channel with good oxidation resistance. Background technique [0002] The blast furnace tapping chute is a channel for guiding high-temperature molten iron and slag. The durability of the refractory materials used in the iron trough directly affects the normal production of blast furnace ironmaking, so it is one of the most important links in ironmaking production. The construction of the lining of the blast furnace tapping channel is mainly divided into ramming, vibration forming, prefabricated part masonry, pouring and other methods. In the late 1970s, Japan developed a castable construction method. This method has uniform structure, low noise, and The advantages of easy repair and other advantages have gradually become the mainstream, driving the rapid development of ir...

AI Technical Summary

Problems solved by technology

In the past two years, most of the various types of blast furnaces that have been newly built and put into operation have adopted methods such as increasing the effective volume of the blast furnace, increasing the wind temperature and pressure, increasing the oxygen-enriched amount of the blast, and increasing the amount of hydrocarbons and pulverized coal. The load of the ditch system has increased the degree of erosion and damage of the refractory material of the tapping ditch, and the ordinary casting material of the tapping ditch is far from meeting the needs of blast furnace production

And for many years, the amount of iron in my country's iron channel castables has been hovering below 100,000 tons, and a few have reached more than 100,000 tons, while there have been reports of hundreds of thousands of tons abroad. Compared with developed countries in Europe and the United States, the domestic level There is still a certain gap

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