2results about How to "With desulfurization" patented technology

This invention relates to the field of comprehensive utilization technology of iron and steel smelting resources, specifically to a method for the direct recycling and utilization of iron-rich red mud in converter steelmaking. The method includes the following steps: Step 1: Retaining slag, including MgO, in the converter for slag splashing and furnace protection; Step 2: Adding fine-grained limestone to the converter; Step 3: Adding iron-rich red mud to the converter, and shaking the converter 2-3 times after the mud has been added; Step 4: Verticalizing the converter and blowing nitrogen into it at least once using a top-blowing method, with each blowing lasting 3-5 seconds and an interval of 10 seconds between each blowing; Step 5: Adding scrap steel to the converter, waiting 0-5 minutes, then adding molten iron and starting the blowing process. This invention directly applies iron-rich red mud to the converter steelmaking process, achieving dephosphorization of molten iron with high phosphorus content without the use of flux.

This invention relates to the field of hydrocracking catalysts, and discloses a hydrocracking catalyst, its preparation method and application, and a method for hydrocracking treatment of residue oil. The hydrocracking catalyst contains molecular sieves, silicon-modified alumina, and active metal components. Optionally, the hydrocracking catalyst also contains alumina and / or additives. The content of the molecular sieve is 5-25 wt%, the content of the silicon-modified alumina is 30-60 wt%, and the content of the alumina is 0-20 wt%. The content of the active metal components, calculated as oxides, is 5-35 wt%, and the content of the additives, calculated as oxides, is 0-1.0 wt%. The catalyst provided by this invention has the advantages of large specific surface area, large pore volume, large pore size, and high metal content. When used in the hydrocracking treatment of residue oil, it not only exhibits high activity and good stability, but also improves naphtha selectivity, expands feedstock adaptability, and reduces hydrogen consumption.