Preparation method for blast furnace slag particle supported catalyst

Abstract

The invention relates to a preparation method for a blast furnace slag particle supported catalyst, and belongs to the technical field of blast furnace slag treatment methods and blast furnace slag treatment equipment. Blast furnace slag generated by iron smelting is prepared into the catalyst, operation is easy, the blast furnace slag particle supported catalyst is free of secondary pollution to the environment in the production process, capable of effectively adsorbing and eliminating nitrogen oxide in boiler smoke of a power plant and high in adsorption performance, and therefore the blast furnace slag waste resources are efficiently utilized. The method is unique and easy to implement, and embodiments prove that the prepared blast furnace slag particle catalyst is placed into a filter net in the boiler smoke of the power plant, so that the removal rate of the nitrogen oxide is up to above 96.6% through the detection result, and the content reaches the national emission standards.

Description

technical field

[0001] The invention relates to a method for preparing a catalyst supported by blast furnace slag particles, and belongs to the technical field of blast furnace slag treatment methods and equipment. Background technique

[0002] Blast furnace slag is the waste discharged from the blast furnace when the pig iron is smelted. When the furnace temperature reaches 1400-1600°C, the furnace charge is melted, and the gangue in the ore, the ash in the coke, the co-solvent and other impurities that cannot enter the pig iron are formed. Salts and aluminates are mainly slags floating on the molten iron, which can be divided into steelmaking pig iron slag, foundry pig iron slag, ferromanganese slag, etc.

[0003] According to statistics, about 300-350kg of blast furnace slag is produced for every 1 ton of pig iron smelted. According to the calculation of my country's annual iron production of 469.94 million tons, the amount of slag produced is as high as 140 million tons....

Examples

Embodiment Construction

[0015] First, take 200-400g of blast furnace slag, put it into an ultrafine pulverizer for crushing, then put it into a container, add 80-150mL of hydrochloric acid solution with a mass fraction of 35%, stir for 20-35min, filter and rinse with deionized water ; Then put the filtered particles into a drying furnace to dry, take out the dried particles and put them in a melting furnace, adjust the temperature to 1500-1700°C until the particles are completely melted; then use a temperature of 3-10°C and store in The hydrogen gas in the container with a pressure of 8MPa quickly cools the molten blast furnace slag particles, puts them into a pulverizer, and crushes them into particles with a particle size of 5-10mm; then pour the crushed particles into the container, and pour them into the Add 20-30ml of nickel sulfate solution with a mass concentration of 0.5mol / L, 20-30g of sodium dodecylbenzenesulfonate and 50-60mL of absolute ethanol and mix well; then take 3-4g of potassium alu...

technical field

[0001] The invention relates to a method for preparing a catalyst supported by blast furnace slag particles, and belongs to the technical field of blast furnace slag treatment methods and equipment. Background technique

[0002] Blast furnace slag is the waste discharged from the blast furnace when the pig iron is smelted. When the furnace temperature reaches 1400-1600°C, the furnace charge is melted, and the gangue in the ore, the ash in the coke, the co-solvent and other impurities that cannot enter the pig iron are formed. Salts and aluminates are mainly slags floating on the molten iron, which can be divided into steelmaking pig iron slag, foundry pig iron slag, ferromanganese slag, etc.

[0003] According to statistics, about 300-350kg of blast furnace slag is produced for every 1 ton of pig iron smelted. According to the calculation of my country's annual iron production of 469.94 million tons, the amount of slag produced is as high as 140 million tons....

Examples

Embodiment Construction

[0015] First, take 200-400g of blast furnace slag, put it into an ultrafine pulverizer for crushing, then put it into a container, add 80-150mL of hydrochloric acid solution with a mass fraction of 35%, stir for 20-35min, filter and rinse with deionized water ; Then put the filtered particles into a drying furnace to dry, take out the dried particles and put them in a melting furnace, adjust the temperature to 1500-1700°C until the particles are completely melted; then use a temperature of 3-10°C and store in The hydrogen gas in the container with a pressure of 8MPa quickly cools the molten blast furnace slag particles, puts them into a pulverizer, and crushes them into particles with a particle size of 5-10mm; then pour the crushed particles into the container, and pour them into the Add 20-30ml of nickel sulfate solution with a mass concentration of 0.5mol / L, 20-30g of sodium dodecylbenzenesulfonate and 50-60mL of absolute ethanol and mix well; then take 3-4g of potassium alu...