14 results about "Oxygen converter" patented technology

The present invention discloses a manufacturing process for a riser joint of an offshore oil and gas platform, relating to the technical field of preparation, including: the manufacturing process selects forgings with specific components, smelts them through an electric furnace or an oxygen converter, and conducts forging, isothermal annealing, final heat treatment, and mechanical property testing; the method for monitoring the isothermal annealing temperature includes: monitoring the temperature in the furnace cooling stage, calculating the isothermal trade-off value to determine the isothermal analysis point; constructing an isothermal gradient field, analyzing the temperature change, constructing an equivalent cooling temperature curve, and comparing it with the continuous cooling transformation curve of supercooled austenite; if the trend of the curve changes inconsistently, judge whether the current temperature is in the bainite stage, and if not, judge the regulation margin; if the regulation margin is insufficient, calculate the approximate time difference, regulate the temperature in stages, and improve the stability of the process.

A fire prevention device is present. The fire prevention device comprises a particulate filter, a mixing chamber, a converter, and a gas scrubber. The particulate filter is configured to capture flammable gas from a battery pack housing and to filter flammable gas emissions from the battery pack housing. The mixing chamber is in fluid communication with the particulate filter and is configured to capture the flammable gas from the particulate filter. The mixing chamber is also in fluid communication with an oxygen supply. The converter is in fluid communication with the mixing chamber and is configured to capture the flammable gas and oxygen from the mixing chamber. The converter includes an oxidation catalyst that converts the flammable gas into an inert gas through a chemical reaction. The gas scrubber is in fluid communication with the converter.The fire prevention device is connected to the battery pack housing.

A process for treating slag coming from steel production by means of an electric arc furnace (1), or an oxygen converter, and defined as starting slag, the process comprising the following steps: (i) mixing said starting slag in liquid form, comprising iron oxides (FexOy) with Aluminum and / or Silicon and / or Ferrosilicon scrap; (ii) metallothermic reaction between said iron oxides and said Aluminum and / or Silicon and / or Ferrosilicon scrap resulting in the production of (a) Iron, and (b) aluminum oxide (AI2O3) and / or silicon oxide (SiO2); (iii) separating the Iron and the treated slag, with reduced iron oxide content, said treated slag incorporating said aluminum oxides (AI2O3) and / or silicon oxides (SiCfe) formed in step (ii); wherein said mixing occurs gradually, at least partially by directly feeding said Aluminum and / or Silicon and / or Ferrosilicon scrap into a flow of the starting slag in liquid form during a pouring step from a first container to a second container; wherein said second container receives both the starting slag flow and the Aluminum and / or Silicon and / or Ferrosilicon scrap added thereto and acts as a metallothermic reactor; and wherein the Aluminum and / or Silicon and / or Ferrosilicon scrap is fed in a controlled manner by means of a dosing device (6).

The invention discloses a flux-cored wire automatic vertical position welding process for 9Ni steel, which comprises the following steps of: S1, according to the technical requirements of the 9Ni steel, smelting the 9Ni steel by an oxygen converter, and performing external refining; the delivery state of the steel plate is quenching and tempering; s2, technical model selection of a matched flux core: selecting a flux-cored wire with the diameter of 1.2 mm; s3, automatic welding equipment is adopted, a welding joint is an X-shaped groove, the depth of a first welding surface accounts for 2 / 3 of the thickness of the steel plate, the angle of the groove is that the first welding surface is 60 degrees, the later welding surface is 60 degrees, the truncated edge is 2 mm, the root gap is 0-3 mm, after welding of the first welding surface of the X-shaped groove is completed, an angle grinder is immediately adopted for cleaning a reverse welding seam, and then welding continues to be conducted; according to the process, flux-cored wire automatic vertical position welding of 9Ni steel is carried out, the welding process is stable and reliable, formed welding seams are attractive and uniform, nondestructive testing and mechanical property testing results of welded joints meet the specification requirements of classification societies, and the stable and reliable welded joints can be obtained.

The invention relates to cold-pressed solid agglomerates comprising a DRI powder or a pre-reduced briquette powder. In this context, the present invention presents universal agglomerates that can be used in blast furnaces, alkaline oxygen converters (BOFs) and electric arc furnaces (EAFs). For this purpose, the agglomerates of the invention comprise (i) 80% to 90% by mass of a DRI powder or a pre-reduced briquette powder, (ii) 5% to 10% by mass of at least one binder, and (iii) 5% to 10% by mass of charcoal. According to the invention, the method for producing cold-pressed solid agglomerates comprises the following steps: (i) mixing 80% to 90% by mass of a DRI powder or a pre-reduced briquette powder, 5% to 10% by mass of at least one binder and 5% to 10% by mass of carbon; and (ii) cold pressing the mixture of the DRI powder or the pre-reduced briquette powder, the at least one binder and the charcoal.

The invention relates to the technical field of aquaculture, in particular to intelligent fishpond oxygenation equipment which comprises a supporting floating plate and a mounting floating plate arranged on the supporting floating plate, an oxygenation rotating wheel is arranged in the middle of the bottom of the supporting floating plate, and a water oxygen detector, a buoyancy component and four balance components obliquely distributed towards the outer side are arranged on the periphery of the bottom of the supporting floating plate. A protection component is arranged outside the oxygenation rotating wheel and the four balance components, and a power shaft connected with the oxygenation rotating wheel and a transmission mechanism connected to the power shaft and the four balance components are arranged on the supporting floating plate. An oxygenation motor, a control processor and a power supply are arranged on the mounting floating plate. The problems that during oxygenation, the oxygen concentration of water is increased, fish schools are easily attracted to approach, and the impeller easily hurt the fish schools are solved; and the problem that existing oxygenation equipment needs to be fixed through a rope and cannot be suitable for a fish pond in a wide water area is solved, the oxygenation rotating wheel is assisted to conduct oxygenation together, and the oxygenation efficiency and the oxygenation effect are improved.

The invention discloses an ultralow-temperature high-toughness 7Ni steel plate based on composite microalloying and a short-process preparation method, and relates to the technical field of steel production. The steel plate comprises the following chemical components in percentage by mass: 0.03 to 0.06 percent of C, 0.15 to 0.30 percent of Si, 0.80 to 1.20 percent of Mn, 6.80 to 7.20 percent of Ni, 0.3 to 0.6 percent of Cr, 0.10 to 0.20 percent of Mo, 0.010 to 0.020 percent of Nb, 0.008 to 0.015 percent of Ti, less than or equal to 0.004 percent of P, less than or equal to 0.002 percent of S, less than or equal to 0.0015 percent of O and the balance of Fe and inevitable impurities. The preparation method sequentially comprises the steps of KR molten iron pretreatment, oxygen converter smelting, LF / RH refining, continuous casting (casting blank slow cooling for 48 h), heating to 1180-1280 DEG C in the steel rolling stage, two-stage controlled rolling and gradient controlled cooling, and heat treatment is not needed. The transverse and longitudinal Rm of the steel plate is 690-825 MPa, the Rel is larger than or equal to 600 MPa, the A is larger than or equal to 20%, the impact absorption energy AKV at-196 DEG C is larger than or equal to 120 J, the Ni cost and energy consumption are greatly reduced, and the stability and batch manufacturing advantages of the steel plate are improved.

The invention relates to the field of gas removal of dust-laden gases in metallurgical plants and treatment of the gases for gas analysis. In one aspect, the invention relates to a gas removal device (1) for removing hot dust-laden gas from an exhaust gas line (2) of a metallurgical plant, in particular an oxygen converter or an electric arc furnace. The hot dust-loaded gas has a ferromagnetic particulate material. The removal pipe (3) is arranged in the exhaust gas line in such a way that a partial flow of the gas is removed, the cooling section (4), the gas cleaning section (6), the analysis section (7a), the gas feed unit (8) and the return pipe (9) being arranged downstream of the removal pipe. In another aspect, the invention relates to a gas analysis device comprising a gas extraction device (1). The aim of the invention is to provide a device which allows the gas composition of hot dust-laden exhaust gases to be measured with low time delay, low measurement uncertainty and high fail-safe. This object is achieved in that the gas cleaning section 6 has a magnetic particle separator, by means of which ferromagnetic particle material is separated from the partial flow of the gas in corresponding fractions.

A fire prevention device is provided. The fire prevention device includes a particulate filter, a mixing chamber, a converter, and a gas scrubber. The particulate filter is configured to receive flammable gas from a battery pack housing and to filter ejecta from the flammable gas exhausted from the battery pack housing. The mixing chamber is fluidly coupled with and configured to receive the flammable gas from the particulate filter. Additionally, the mixing chamber is fluidly coupled with an oxygen supply. The converter is fluidly coupled with and configured to receive the flammable gas and oxygen from the mixing chamber. The converter includes an oxidation catalyst that converts the flammable gas to an inert gas by a chemical reaction. The gas scrubber is fluidly coupled with the converter. The fire prevention device is coupled to the battery pack housing.

This invention relates to a 60-100mm thick SA537CL1 steel plate with excellent die-welding performance and its manufacturing method, belonging to the field of metallurgical technology. The chemical composition of the steel plate (wt%) is: C: 0.06-0.09%, Si: 0.25-0.50%, Mn: 1.40-1.60%, P≤0.010%, S≤0.003%, Ni: ≤0.10%, Mo: 0.05-0.08%, Nb: 0.010-0.030%, Ti: 0.010-0.030%, with the balance being Fe and unavoidable impurities, and a carbon equivalent (Ceq) ≤0.36%. The surface microstructure is bainite, the microstructure at 1 / 4 thickness position is acicular ferrite + pearlite, and the core microstructure is polygonal ferrite + pearlite + acicular ferrite. The manufacturing process is as follows: oxygen converter smelting → ladle furnace refining → vacuum treatment → thick slab continuous casting → billet cooling → billet heating → controlled rolling → controlled cooling → stacking and slow cooling.

The invention relates to 700MPa-grade hot-rolled twisted steel and a production method thereof. The 700MPa-grade hot-rolled twisted steel comprises the following components in percentage by weight: C, Si, Mn, V, Nb, Cr, N and the balance of iron and impurities. The method comprises the following steps: adding molten iron, scrap steel and pig iron into an oxygen converter, carrying out conventional top-bottom combined blowing, and adding lime, dolomite and magnesite balls for slagging; after tapping is completed, molten steel is sent to an LF furnace for refining, and alloy is added after refining is completed; blowing nitrogen to the molten steel for 10 minutes, and continuously casting into a steel billet; the steel billet is fed into a heating furnace, rough rolling is conducted through a rough rolling machine, intermediate rolling is conducted through an intermediate rolling machine, water cooling is conducted before finish rolling, finish rolling is conducted, VN particles are induced to be separated out through controlled rolling deformation, weak water penetration is conducted after finish rolling, and air cooling is conducted through a cooling bed, so that the high-strength steel bar can be obtained. According to the twisted steel produced by adopting the components and the method, the lower yield strength is greater than 700MPa, the percentage elongation after fracture is greater than 16%, the microscopic structure is ferrite and pearlite, and the mechanical property is stable.

A fire protection device is provided. The fire protection device includes a particulate filter, a mixing chamber, a converter, and a gas scrubber. The particulate filter is configured to receive the combustible gas from the battery pack housing and filter an expulsion of the combustible gas discharged from the battery pack housing. A mixing chamber is fluidly coupled with the particulate filter and configured to receive the combustible gas from the particulate filter. In addition, the mixing chamber is fluidly coupled with an oxygen supply. A converter is fluidly coupled with the mixing chamber and configured to receive the combustible gas and oxygen from the mixing chamber. The converter includes an oxidation catalyst that converts the combustible gas into an inert gas by a chemical reaction. The gas scrubber is fluidly coupled with the converter. A fire protection device is coupled to the battery pack housing.

The invention provides a method for smelting high-quality carbon strip steel from converter low-silicon high-temperature molten iron, which belongs to the technical field of oxygen converter steelmaking, and comprises the following steps: before smelting, inputting the components and temperature of molten iron into a heat balance calculation model system, and filling scrap steel and low-silicon high-temperature molten iron according to the calculated quantity of the scrap steel and the molten iron. A first batch of slagging materials is added while blowing is started, 50% of lime, 50% of light-burned dolomite and 50% of cold-pressed iron balls are added, and 100% of dolomite is added; and when the oxygen blowing amount is 20%-25% of the total oxygen supply amount, adding the rest metallurgical lime and light-burned dolomite. And slag charge consumption: 22-25 kg of lime is consumed per ton of steel, 18-24 kg of light-burned dolomite is consumed per ton of steel, 6-10 kg of dolomite is consumed per ton of steel, and 22-24 kg of cold-pressed iron ball is consumed per ton of steel. The method solves the problems of difficult slagging and low dephosphorization rate in smelting of high-quality carbon strip steel from low-silicon high-temperature molten iron in the converter.

The utility model discloses a converter oxygen lance fixing device, which belongs to the technical field of oxygen converter steelmaking, and comprises a rack, a lifting mechanism arranged above the rack, a main lance limiting mechanism arranged on the lifting mechanism, a main oxygen lance arranged in the main lance limiting mechanism, a standby sliding rail arranged on one side above the rack, a standby sliding block connected with the standby sliding rail in a sliding manner, and a main oxygen lance arranged in the standby sliding block. A standby sliding rail is arranged on the rack, a standby limiting mechanism is arranged on the standby sliding block, a standby oxygen lance is arranged in the standby limiting mechanism, a transfer sliding rail is arranged on the side, away from the standby sliding rail, of the rack, a transfer sliding block is arranged on the transfer sliding rail, and a disassembling assembly is arranged on the transfer sliding block. And the phenomenon that the oxygen lance is difficult to butt with equipment is avoided, and the stability and the safety of operation are improved.