Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

78results about How to "Promote degassing" patented technology

Method for controlling cleanliness of molten steel, and smelting control method capable of preventing molten steel gap from nodulation during sulphur and aluminum contained steel pouring

InactiveCN111172353AControl purity/cleanlinessNodulation problem containmentSlagMolten steel
The invention discloses a method for controlling cleanliness of molten steel, and a smelting control method capable of preventing a molten steel gap from nodulation during sulphur and aluminum contained steel pouring, and belongs to the field of smelting. The method for controlling cleanliness of the molten steel comprises the following steps that blast furnace molten iron without desulfuration issubjected to converter smelting, and during converter tapping, deoxygenation, alloying and tapping wash heat are carried out in sequence for carrying out inclusion removal treatment. Through an LF furnace, converter tapping is subjected to refining under the condition that acid soluble aluminum is not adjusted, that is, during tapping, a slagging constituent is added for controlling refining slagcomposition, and after the slag is dissolved, deoxygenation is carried out through a deoxidizing agent. Through the process, the content of sulphur in the molten steel is monitored, ferrous sulfide is used for adjusting the content of sulphur in the molten steel to the first target value, an RH furnace is used for refining LF furnace tapping, in the process, according to the content of the acid soluble aluminum of LF furnace tapping, selective aluminum feeding is carried out to adjust the content of the aluminum to the second target value, and after RH furnace refining is finished, calcium treatment is carried out. According to the process, the cleanliness of the molten steel can be improved, the nodulation problem during molten steel pouring can be avoided, and the stopper bar curve rising can be controlled.
Owner:SGIS SONGSHAN CO LTD

Method of recycling zinc by comprehensively utilizing steelmaking dust

The invention discloses a method of recycling zinc by comprehensively utilizing steelmaking dust. The method comprises the following steps that steelmaking dust is mixed with a reducing agent and an additive and is pressed into pellets, the pellets are fed into a vacuum carbon tube furnace to carry out vacuum roasting to obtain gaseous elementary zinc volatile matter, the gaseous elementary zinc volatile matter passes through a condensation collector to be condensed to a solid, and the solid is obtained as a high-purity zinc ingot. The method promotes the reduction of zinc in steelmaking dustand recycles the steel-making dust, so that the high-quality zinc ingot is obtained, energy consumption during the control of vacuum condition in the steelmaking dust treatment process is reduced, theprocess is simple, the operation is simple and convenient, the vacuum reduction can effectively evaporate the zinc in the steelmaking dust, the purpose of condensing and collecting elementary zinc isachieved, the recovery rate of the zinc in the steelmaking dust is up to 97. 76%, the problem that in the prior art, the cost is high, the pollution is heavy, the energy consumption is high and threewastes are large when zinc-containing steel-making dust is treated are solved is effectively solved, and finally, the purpose of waste recycling is achieved.
Owner:GUIZHOU UNIV

Preparation method of poly(p-phenylene benzobisoxazole) fibers

The invention belongs to the field of high-performance fibers, and particularly relates to a preparation method of poly(p-phenylene benzobisoxazole) fibers. The preparation method comprises the following steps of taking frozen polyphosphoric acid powder, phosphorus pentoxide, 4,6-diaminoresorcinol hydrochloride and terephthalic acid as raw materials, putting the phosphorus pentoxide into a reaction system step by step in a reasonable proportion in a proper time period, and detecting and regulating the apparent viscosity of the materials in real time in a prepolymerization process to ensure that a prepolymer with uniform apparent viscosity is obtained; performing post-polymerization to obtain PBO spinning slurry; and performing dry-jet wet spinning and post-spinning to obtain the finished PBO fibers. The method overcomes the defects that traditional solid raw materials are poor in solvent mixing and dispersing effect, easy to agglomerate and incapable of uniformly reacting, ensures the consistency of a prepolymerization reaction end point, and reduces the process errors. The intrinsic viscosity of the polymer in the same batch in different time periods is small in change and high, the mechanical property of the fibers can be obviously improved, and the quality stability is also improved.
Owner:SHANDONG NON METALLIC MATERIAL RES INST

Internal power pneumatic automatically-intermittent circulator

The invention discloses a device which achieves pneumatic automatically-intermittent circulation by adopting gas generated in an anaerobic digester as internal power. The device is characterized in that a circulation loop is formed by feeding a gas collecting tank 11, a water level control gas valve 6, a gas collecting hood 12, a gas (water) inlet pipe 3, a reflux pipe 5 and a check valve 14 to the bottom of a digestion area 13 together. When the water level control gas valve 6 is closed, biogas continuously enters the gas collecting tank 11 by virtue of a gas seal 4, the gas collecting hood 12 and the gas (water) inlet pipe 3 to ensure that pressure in the gas collecting tank 11 is continuously increased, and a material liquid in the gas collecting tank 11 is forced to enter the bottom of the digestion area 13 by virtue of the reflux pipe 5 and the check valve 14. When the water level of the gas collecting tank 11 is lowered to the set water level, the water level control gas valve 6 is automatically opened, and the gas in the gas collecting tank is continuously exhausted; when the water level in the gas collecting tank 11 reaches the set low water level, the water level control gas valve 6 is automatically opened, the pressure in the gas collecting tank 11 is reduced, water in the upper part of the digestion area is absorbed into the gas collecting tank by virtue of the gas (water) inlet pipe 3, and when the water level in the gas collecting tank 11 reaches the set high water level, the water level control gas valve 6 is automatically closed. The gas collecting tank enters the next round of water discharge, gas exhaust and water absorption circulation so as to achieve internal power automatically-intermittent circulation.
Owner:方义 +1
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products