13 results about "Oxygen potential" patented technology

A method for improving the accuracy of pH value detection using an antimony-based pH electrode, belonging to the field of pH value detection technology, includes: measuring the dissolved oxygen concentration of the test solution; comparing this dissolved oxygen concentration with the dissolved oxygen concentration of the standard buffer solution used during pH sensor calibration; when the two dissolved oxygen concentrations differ, dissolved oxygen potential compensation is required: multiplying the difference between the two dissolved oxygen concentrations by a dissolved oxygen concentration compensation coefficient to obtain a dissolved oxygen potential compensation value; and using this dissolved oxygen potential compensation value to compensate the electrode potential of the antimony-based pH electrode in the test solution, thereby achieving accurate pH value measurement. This invention improves the measurement accuracy of the antimony-based pH electrode and the accuracy of in-situ pH value monitoring results through dissolved oxygen potential compensation.

The application discloses a low copper loss double-side blown bath smelting method and belongs to the technical field of copper pyrogenic smelting. The method constructs a vertical oxygen potential gradient in the same smelting furnace: 70%-85% of oxygen-rich air is blown into the tuyere at the lower part of the furnace body to form a strong oxidation smelting zone; and a reducing medium such as natural gas or pulverized coal is sprayed into the slag layer at the upper part of the furnace body to form a weak reduction clarification zone. The amount of the reducing medium sprayed is dynamically adjusted by on-line monitoring of the CO content in the flue gas or the Fe3O4 content in the slag, and the Fe3O4 content in the slag is controlled to be 3%-6%. The method efficiently reduces Fe3O4 in the slag into FeO, significantly reduces the viscosity of the molten slag, and improves the slag-ice-copper separation condition, so that the copper content in the discarded slag is stably reduced from more than 1.8% in the conventional method to less than 1.3%, and the metal recovery rate is improved. Meanwhile, the method realizes integration of smelting and tempering, simplifies the process, reduces energy consumption, and enhances the adaptability to complex raw materials.

This invention relates to the field of special ceramics preparation technology, and discloses a process for preparing high thermal conductivity ceramic materials for high-nickel ternary cathode sintering, including: preparing magnesium aluminum spinel green blanks containing magnesium oxide, yttrium oxide and titanium oxide composite additives; performing cyclic variable oxygen pressure sintering at 1420℃ to 1480℃, controlling the furnace atmosphere to periodically switch between the first and second oxygen partial pressure states. This invention utilizes the oxygen potential difference to drive the grain boundary liquid phase to alternate between low viscosity wetting and high viscosity pinning characteristics, eliminating the rheological quiescent zone at the end of sintering, effectively suppressing abnormal grain growth while ensuring high material density, and improving the thermal conductivity and lithium erosion resistance of the ceramic sagger.

The application discloses a kind of noble metal smelting process oxygen content determination method, comprising the following steps: S1, in noble metal smelting process, controlled inert gas micro pulse is applied to the target local area of the surface of molten pool, to apply controllable transient disturbance to the oxygen exchange balance state of the target local area;S2, around the controllable transient disturbance process, the multi-source response data of the oxygen potential evolution of molten pool is synchronously collected, and the application relates to the technical field of noble metal smelting process monitoring.This kind of noble metal smelting process oxygen content determination method, controlled inert gas micro pulse is applied to the oxygen exchange balance state of the target local area, by reasonably setting the time width, flow and the parameters such as action depth of micro pulse, disturbance intensity can be accurately controlled, the influence on the overall thermodynamic state of molten pool is guaranteed to be within controlled range, and the stability of smelting process and product quality are ensured.

The invention relates to the technical field of energy production, and provides a boiler oxygen amount control method which comprises the following steps: acquiring operation data including a combustion state, an air distribution state, a fuel supply state, an ammonia doping state and a stable combustion state; carrying out time delay alignment on the detection quantity with the transmission lag, and generating credibility according to the characterization deviation of the detection quantity with the transmission lag on the reference value of the oxygen potential in the furnace; constructing a confidence available oxygen amount based on an oxygen amount detection value, the credibility and a reduction risk penalty term; wherein the stable combustion state information participates in penalty term calculation and oxygen amount lower boundary correction in the form of flame stability evaluation quantity; determining upper and lower running boundaries of the oxygen amount according to the current load and the ammonia doping working condition, and synchronously accumulating reduction debts; when it is predicted that the confidence available oxygen amount will fall to the lower boundary of the oxygen amount or the reduction debt exceeds a threshold value, local air distribution repair is executed firstly, total air volume correction is executed only when local air distribution repair is insufficient, and execution is executed according to the opposite sequence during withdrawing.

The invention discloses a characterization method for oxygen potential of a high-titanium blast furnace hearth. The characterization method comprises the following steps: step (1), calculating oxygen partial pressure pCO of carbon monoxide gas in the target blast furnace hearth through a formula; (2) calculating the oxygen partial pressure of the oxygen gas in the target blast furnace hearth through a formula; and (3) the oxygen potential Ox in the target blast furnace hearth is calculated through a formula. According to the oxygen potential characterization method, a new method is established, the oxygen partial pressure in the blast furnace hearth can be calculated through simple calculation by utilizing part of process technical parameters and field production data of the blast furnace, and the oxygen potential of the blast furnace hearth is redefined and determined so as to assist a blast furnace operator in judging the current hearth state; and meanwhile, technological operation parameters can be adjusted and optimized in time, and the method is simple, efficient, practical and suitable for the high-titanium blast furnace.

The application discloses a control method of an oxygen-enriched side-blown smelting process, which is suitable for smelting processes of furnace charging materials containing pyrolysis residues and copper sulfide ores in an oxygen-enriched side-blown smelting furnace. At least two operation parameters of oxygen content in flue gas, copper matte phase grade, Fe3O4 content in slag, copper content in slag and slag fluidity are obtained in the smelting process, so as to judge the oxygen potential state in the furnace and the matte-slag separation state; when the oxygen potential in the furnace is increased and accompanied by the increase of the Fe3O4 content in the slag, the oxygen-enriched concentration and / or the side-blown oxygen supply amount are reduced; when the slag fluidity is reduced and / or the copper content in the slag is increased, the flux adding amount is adjusted. Through the linkage adjustment of the oxygen supply parameters and the flux adding amount, the accumulation of Fe3O4 is inhibited, the copper loss with the slag is reduced, and the stable smelting operation is restored.

The invention relates to a high-strength and high-toughness steel plate and a preparation method thereof, and belongs to the technical field of steel. A preparation method of the high-strength and high-toughness steel plate mainly comprises the following steps of molten steel impurity removal, cooling rolling, cyclic top-speed heating, constant-temperature rolling and cooling to obtain the high-strength and high-toughness steel plate, and hydrogen introduced in the impurity removal step can reduce the oxygen potential and enhance the bonding strength of calcium and sulfur so as to improve the cleanliness of the steel plate; the method comprises the following steps: cooling, rolling and refining so as to facilitate the refining of ferrite grains, and carrying out top-speed heating, so that a large amount of dislocation martensite exists, the inhibition effect of undissolved carbide on the growth of austenite grains is realized, and meanwhile, the recrystallization effect of ferrite is prevented, so that the grains are further refined; and finally, nano twin crystals are formed through constant-temperature rolling to consolidate the strength of the steel plate, so that the steel plate obtained through the preparation method has excellent mechanical strength and toughness.

The invention discloses a process for efficiently recovering tin, copper and silver in kesterite based on a sulfur potential and oxygen potential regulation and control method. The process comprises the following steps that the kesterite, a vulcanizing agent, a reducing agent and a solvent are mixed and granulated; the obtained materials are subjected to volatilization smelting, and tin-containing smoke dust, copper matte and furnace slag are obtained; during smelting, the sulfur potential of a system is controlled to be log pSO2 = 1.0 + / -0.5, and the oxygen potential of the system is controlled to be log pO2 =-7 + / -0.5; mixing the obtained tin-containing smoke dust with a reducing agent and a solvent, and carrying out reduction smelting; and then a reducing agent is supplemented, the temperature is increased, zinc evaporation smelting is conducted, and crude tin, secondary smoke dust and furnace slag are obtained. The technology is good in adaptability, the tin-copper-silver bulk concentrate can be directly treated, low-grade raw materials which are difficult to treat through a traditional technology can be effectively utilized, efficient recycling of valuable metal such as tin, copper, silver and zinc is achieved, and the content of the valuable metal in slag is low.

The invention discloses a high-alkalinity sintered flux for a pressure steel pipe of a pumped storage power station and a preparation method of the high-alkalinity sintered flux, and belongs to the technical field of welding. The problems that after the pressure steel pipe of the pumped storage power station is welded through the welding flux, a weld joint cannot have high strength and low-temperature toughness at the same time, and the slag detachability is poor are solved. The flux comprises mineral dry powder and a binder, wherein the mineral dry powder comprises the following components in percentage by mass: 6-16% of wollastonite, 10-20% of fused magnesite, 25-40% of bauxite, 25-40% of fluorite, 5-10% of feldspar, 1-5% of manganese ore and 1-5% of an alloying agent. A wollastonite-bauxite-fluorite-fused magnesite quaternary system is used for deep deoxidation through oxygen potential synergistic pressing and nucleation synergistic catalysis, formation of acicular ferrite is promoted, and the low-temperature impact toughness is improved. When the welding flux is used in cooperation with a high-strength steel welding wire, the welding seam formability is good, the welding seam structure components are uniform, high strength and low-temperature toughness are achieved, the surface of a welding bead is smooth, and the deslagging performance is good.

The present application relates to the technical field of energy production, and provides a boiler oxygen content control method, comprising: collecting operation data including combustion state, air distribution state, fuel supply state, ammonia mixing state and stable combustion state; time delay alignment is performed on the detected quantity with transmission lag, and a credibility is generated according to the deviation of the characterization of the oxygen potential reference value in the furnace; a credible effective oxygen content is constructed based on the oxygen content detection value, the credibility and the reduction risk penalty term; wherein the stable combustion state information participates in the calculation of the penalty term and the correction of the lower oxygen content boundary in the form of the flame stability evaluation quantity; the upper and lower operation boundaries of the oxygen content are determined according to the current load and the ammonia mixing condition, and the reduction debt is accumulated synchronously; when the predicted credible effective oxygen content will fall below the lower oxygen content boundary or the reduction debt exceeds the threshold value, local air distribution repair is performed first, total air volume correction is performed only when the local air distribution repair is insufficient, and the reverse order is performed during the retreat.

This invention belongs to the field of comprehensive utilization technology of metallurgical and chemical resources, and discloses a method for increasing the production capacity of magnetite powder and sulfuric acid by incorporating pyrite into copper smelting. This method optimizes the heat release rate, SO2 generation kinetics, and iron oxide phase transformation pathway by constructing a gradient incorporation mechanism for pyrite and a furnace-based oxygen potential directional oxidation control system. Its key features include: dynamically controlling the pyrite incorporation rate, particle size, and carrier gas oxygen concentration in stages based on real-time feedback from molten pool temperature, flue gas SO2 concentration, and slag FeO activity; creating a reducing microenvironment of logpO2≈-11 at the slag-matte interface to promote Fe3O4 crystal nuclei growth; and optimizing flue gas cooling and sulfuric acid inlet stability. This invention not only achieves simultaneous improvement in the production capacity of magnetite powder and sulfuric acid but also ensures the stability and efficiency of the main copper smelting process, providing an engineering-feasible technical path for the comprehensive utilization of resources in copper smelting enterprises.

1. The name of the design product: copper liquid oxygen probe. 2. The use of the design product: the use of the oxygen potential generated by the different oxygen concentrations on the inside and outside of zirconium oxide at high temperature to measure the oxygen content of the copper liquid. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.