2results about How to "Good deoxygenation" patented technology

This invention discloses a method for controlling inclusions in titanium-containing ultra-low carbon steel. The steelmaking process is as follows: converter process – LF process – RH process – slab continuous casting process. After aluminum deoxidation and alloying in the RH process, low-reactive slag is added. As the vacuum molten steel circulates, this slag floats to the surface and remains at the steel-slag interface, hindering oxygen transfer from the ladle slag to the molten steel. Simultaneously, this substance has the ability to adsorb inclusions in the steel. By controlling the process parameters of the RH process, oxygen transfer from the ladle slag to the molten steel is effectively prevented, avoiding secondary oxidation of titanium and aluminum elements in the deoxidized steel and controlling the inclusion content in the steel. This invention's control method effectively prevents oxygen transfer from the ladle slag to the molten steel and avoids secondary oxidation of easily oxidized elements such as titanium and aluminum in the deoxidized steel, resulting in significant economic and social benefits.

The present application relates to the technical field of biomass energy conversion, and particularly relates to a device for preparing bio-crude oil through continuous hydrothermal liquefaction of biomass, which comprises a pretreatment unit, a hydrothermal reactor, a gas-solid-liquid separator and an oil-water separator connected through pipelines in sequence, and further comprises a catalyst circulation unit for converting solid residues into catalysts, the catalyst circulation unit comprising an activation reactor and a conditioning tank connected in series, the activation reactor being connected in parallel to a feed pipeline of the hydrothermal reactor, and the conditioning tank being connected in parallel to a solid outlet of the gas-solid-liquid separator. According to the present application, the solid residues are converted into catalysts, so that the catalysts are high-performing, the catalysts are recycled during hydrothermal liquefaction, and the bio-crude oil is further upgraded.