A 200kg experimental coke oven masonry material and its application

Abstract

The invention discloses a 200-kg experiment coke oven masonry material. The coke oven masonry material comprises caustic burned magnesia, fire-resistant pulverized clinker and iron ore powder, wherein the caustic burned magnesia contains more than 75% of magnesium oxide; the fire resistance degree of the fire-resistant pulverized clinker is 1,580-1,730 DEG C, the water content is not larger than 6%, and the aluminum oxide content is 30%-48%; and the iron grade of the iron ore powder is larger than 55%. The coke oven masonry material is uniformly mixed, a proper quantity of magnesium chloride saturated water solution with a specific gravity larger than 1.3 is added, and the mixture is uniformly blended by a stirrer for standby application. An experiment coke oven built with the coke oven masonry material adopting the formula is sensitive in temperature control, air leakage is avoided, a slurry material is tightly adhered to a coke oven clay wall, few slurry materials fall off, the fettling times is reduced greatly while normal operation of a coke oven experiment is guaranteed, the service life of the coke oven is prolonged, and the cost investment is saved effectively.

Description

Technical field [0001] The invention belongs to the technical field of coke oven masonry, and specifically relates to a 200kg experimental coke oven masonry material and its application. Background technique [0002] Experimental coke ovens are mainly used for coal blending and coking experiments, verifying coal blending schemes, predicting coke strength and other aspects of research and guiding production. It is necessary for coking plants and scientific research units to improve coke quality, reasonably select coking coal, and reduce coke production costs. Laboratory equipment. Due to the specific application of the experimental coke oven, the wall mud of the experimental coke oven is required to be tightly bonded, with less mud falling off, and to minimize the number of furnace repairs, while meeting the requirements for sensitive temperature adjustment and no air leakage. [0003] The 200kg experimental coke oven of the Kunshan Iron and Steel Technology Center was built in Jan...

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Problems solved by technology

[0003] The 200kg experimental coke oven of Kunming Iron and Steel Technology Center was completed in January 2005. The first generation furnace was built using the technology introduced from the former Soviet Union by Ansteel Thermal Energy Institute in the 1960s. It was built with magnesia-aluminum bricks and self-made mud. The components are: magnesia with a volume percentage of 60%, 30% refractory clinker powder, 10% iron concentrate powder, and an appropriate amount of brine with a specific gravity of 1.3 or more are added and mixed before masonry. After the coke oven is built, it is waiting for installation When the electric control equipment was installed, the coke oven was seriously deformed and cracked, and it was scrapped after coking. It was found that the Kunming area belongs to the plateau climate. After many tests, low-temperature baking technology was used to build and bake the coke oven smoothly. However, the coke oven built with the above-mentioned masonry materials began to have mud falling off after one year of use, and has been in use since then. The same mud was repaired. By 2009, due to the severe shedding of mud in the coke oven aging brick joints, air leakage, and difficulty in temperature adjustment, the number of furnace repairs increased greatly. On average, 4 to 5 coke furnaces needed to be repaired once. , the labor intensity increased, and the quality of the coke made was lower than that of the coke oven produced, which affected the accuracy of the experimental data, so it was decided to overhaul and rebuild

[0004] When building the second-generation coke oven, in order not to use low-temperature baking technology, water glass was used as the binder. The cracks in the brick cracks, serious air leakage in the coke oven, difficulty in temperature adjustment, and scrapping of the coke oven