75results about How to "Full reduction reaction" patented technology

The invention relates to an upcast method for producing a high-purity bright copper rod. The method comprises the following steps of: drying smelting copper raw materials needed by smelting, mixing, adding the mixture into a smelting furnace, and covering firing charcoal with the thickness of between 100 and 150mm on starting molten copper until red copper is entirely molten, wherein molten copper constantly flows toward a heat preservation furnace under the action of fluid force; boiling the high-temperature molten copper and degassing before ingot guiding, adding prepared high-purity graphite carbon powder onto the liquid level of the molten red copper in the heat preservation furnace, and aerating high-purity nitrogen at the position which is 50 to 100mm lower than the liquid level of the heat preservation furnace; covering the firing charcoal after boiling and degassing, covering a furnace cover, performing draw casting operation, drawing a draw casting machine for draw casting bythe upcast method, cooling in a graphite crystallizer by the upcast method to obtain a qualified high-purity oxygen-free copper rod blank, and winding on a drawn cast ingot passive winding machine; and performing multi-pass rolling and fine-drawing on the high-purity oxygen-free high-brightness copper rod blank by an eight-rack rod cold rolling mill, and drawing the blank until the copper rod is obtained by a wire drawing machine, namely obtaining a finished product after the copper rod passes the inspection.

The invention provides a nano-silver antibacterial agent which includes nano-silver antibacterial stock solutions. Nano-silver is included in the nano-silver antibacterial stock solutions, and the content of the nano-silver is 0.00025 mol/kg to 0.02 mol/kg. The invention further provides a preparation method of the nano-silver antibacterial agent. The nano-silver antibacterial agent can be foam emulsion and sprays in a flow state, can be used as washing-free sprays, and is convenient for people to use when cleaning with water is inconvenient in travel.

The invention discloses a method for cycle purification of uranium in a Purex process. The method comprises the following steps of: pretreating 1CU feed liquor, seasoning, and further purifying plutonium by using a washing agent in a two-dimensional (2D) tank, wherein the used washing agent in the 2D tank is a mixed solution of dimethyl hydroxylamine, monomethyl hydrazine and nitric acid, the concentration of the dimethyl hydroxylamine is 0.01 to 0.1mol/L, the concentration of the monomethyl hydrazine is less than or equal to 0.15mol/L, and the concentration of the nitric acid is 0.8 to 1.2mol/L. The dissipation factor (DF) (Pu/U) in the 2D tank is more than 1,000, and the content of the plutonium in 2EU feed liquor reaches a uranium product index.

The invention provides a method for analyzing the magnetic roasting effects of an iron ore having different granularity ranges. The method mainly comprises the following technological steps: 1, preparing an experiment ore sample and a reduction coal sample; 2, drying the ore sample; 3, uniformly spreading the ore sample and the coal sample on a clean roasting porcelain dish, sending to a box type electric resistance furnace, and carrying out magnetic roasting to obtain a roasted ore; 4, rapidly taking out the roasted ore, and carrying out water quenching cooling; 5, filtering the roasted ore obtained after the water quenching cooling; 6, drying the filtered roasted ore sample; 7, screening the dried roasted ore by grid sieves to form roasted ores respectively having granularity ranges of 0-1mm, 1-3mm, 3-5mm and 5-15mm, and respectively weighing; 8, grinding the roasted ores respectively having granularity ranges of 0-1mm, 1-3mm, 3-5mm and 5-15mm to 1-60 meshes; and 9, carrying out magnetic separation of the roasted ores respectively having granularity ranges of 0-1mm, 1-3mm, 3-5mm and 5-15mm. The experiment method has the advantages of high accuracy and few extraneous influence factors, and provides a basis for the selection of roasting conditions during the sieve fraction magnetic roasting of difficult-separation iron ores.

The invention discloses a decoupling gas burner, and belongs to the technical field of combustion equipment. The decoupling gas burner comprises an outer cylinder body, a separation cylinder body, a gas outer cylinder body and a gas inner cylinder body which are sequentially arranged from outside to inside and coaxial, a first-stage air duct is formed in the gas inner cylinder body, a gas channelis formed between the gas inner cylinder body and the gas outer cylinder body, a second-stage air duct is formed between the gas outer cylinder body and the separation cylinder body, a third-stage airduct is formed between the separation cylinder body and the outer cylinder body, the decoupling burner further comprises a frustum-shaped cylinder body, the small-diameter end of the frustum-shaped cylinder body is connected to the end, which extends into a hearth, of the separation cylinder body, the outer diameter of the large-diameter end of the frustum-shaped cylinder body is smaller than theinner diameter of the outer cylinder body, and in the axial direction of the frustum-shaped cylinder body, the distance between the end, which extents into the hearth, of the outer cylinder body andthe large-diameter end of the frustum-shaped cylinder body is adjustable. According to the provided decoupling gas burner, the frustum-shaped cylinder body is arranged so that the decoupling gas burner can be suitable for different gas and hearth structures.

The invention provides a recovery method of vanadium-containing neutralizing slag. The recovery method comprises the following steps of mixing the vanadium-containing neutralizing slag, concentrated sulfuric acid and water to obtain slurry; adding a reducing agent in the slurry, and performing reduction leaching; performing solid-liquid separation on the slurry obtained after reduction leaching, and cleaning filter residue with a sodium sulfate solution to obtain a vanadium-containing leaching solution and calcium-rich slag; adding ammonium sulfate in the vanadium-containing leaching solution,regulating the pH value of the leaching solution with ammonia water, performing cooling crystallization, and performing solid-liquid separation to obtain an ammonium alum crystal and a neutralizationsolution; and performing counter-current extraction, counter-current back extraction, upflow regeneration and counter-current washing on the neutralization solution, thereby obtaining a high-purity vanadyl sulfate solution. According to the recovery method, when the pollution of a vanadium element in the vanadium-containing neutralizing slag to environment is solved, the high value-added resourceutilization of the calcium-rich slag and the vanadium element in the vanadium-containing neutralizing slag is realized.

The invention relates to a method for measuring the content of titanium dioxide in titanium concentrate, and belongs to the field of analytical tests in titanium slag smelting. The method comprises the following steps: heating the titanium concentrate and strong phosphoric acid for reaction, isolating air in a medium of hydrochloric acid and sulfuric acid, reducing titanium (IV) to titanium (III) by aluminum, and in an oxalic acid environment, taking a neutral red solution as an indicator and titrating by a ferric ammonium sulfate standard solution until the solution is stably blue. According to the method, the acid dissolution process is carried out by strong phosphoric acid and an electrical furnace, and the operation is easy and quick; moreover, the operation time is short, five samples are simultaneously measured by the method, and the total measurement time is 1.5 hours; while the measurement time is 2.5 hours by a standard method of YB/T159.4-1999; the time is shortened by 40%.

The invention discloses a macromolecular dry-process denitration agent, and a preparation method and application thereof. The macromolecular dry-process denitration agent consists of the following rawmaterials in percentage by weight: 60-91.05 wt% of urea, 1-3 wt% of aluminum hydroxide, 4.95-27 wt% of sodium hydroxide and 1-12 wt% of manganese dioxide. The macromolecular dry-process denitration agent is formed by scientifically compounding and processing the raw materials according to the designed proportion, and thus the effects that nitrogen oxide and nitrogen dioxide in boiler flue gas areconverted into nitrogen and water and the boiler flue gas is discharged up to standard can be achieved. The macromolecular dry-process denitration agent has simple components and a good denitration effect, and practice proves that denitration efficiency can reach 85% or above.

The invention discloses a magnesium smelting technique by microwave heating and relates to the field of magnesium smelting techniques. The upper end of the round wall of a furnace body is connected with an expander by bricklaying through a refractory material, and the lower end of the round wall of the furnace body is fixed with a tray; the expander is movably connected with a support in a sliding manner; the lower end of a microporous ceramic tube is fixed with the tray while the upper end of the microporous ceramic tube is fixed with the support; the furnace body is fixed with a microwave generator and a shell; the shell is fixed with an upper flange and a lower flange; a gaseous magnesium collecting chamber is formed by the wall of the furnace body above the support, an upper convergent section of the shell and the inner side of the upper flange; a gaseous magnesium outlet tube is penetrated from the gaseous magnesium collecting chamber and then is fixed with the furnace body and the shell; a slag chamber is formed by the wall of the furnace body below the tray, a lower convergent section of the shell and the inner side of the lower flange; a magnesium ball is put in the microporous ceramic tube; slag is put in the slag chamber; the power of the microwave generator is 1-500KW, the frequency of the microwave generator is 300-3000MHz, the temperature of the microwave generator is 1200-1350 DEG C, and the smelting time is 15-60 minutes; the magnesium ball is acquired by roasting dolomite to acquire magnesium oxide and calcium oxide and then mixing silicon iron and fluorite with magnesium oxide and calcium oxide. The magnesium smelting technique by microwave heating is used for smelting magnesium, which is a microwave new energy heating technology.

A recovery method of waste rare earth polishing powder comprises the following steps: weighing waste rare earth polishing powder, a reducing agent and strong base according to a ratio, uniformly mixing, and carrying out a reduction reaction at 600-800 DEG C for 60-240 min to obtain a reduction product; carrying out water quenching on the reduction product to room temperature to obtain a cooled product; carrying out hydrocyclone separation on the cooled product to obtain a mixture of a rare earth-rich material and a silicate aqueous solution and metallic lead; and filtering the mixture of the rare earth-rich material and the silicate aqueous solution to obtain the silicate aqueous solution and the rare earth-rich material. The pollution of lead in the waste rare earth polishing powder to the environment is solved, and resource utilization of valent rare earth, lead and silicon in the waste rare earth polishing powder is realized. The content of lead in the rare earth-rich material after the technical treatment is negligible. Leaching toxicity of heavy metal in the rare earth-rich material meets the national standard, and harmless, reduction and resource treatment of the waste rare earth polishing powder are realized. The method is in line with the goals of our national circular economy development and energy conservation and emission reduction.

The invention discloses chemical co-production equipment and a method for phosphorus and coal. The equipment is characterized in that high-temperature crude synthesis gas produced in a coal gasifyingreaction is taken as a heat source for producing yellow phosphorus, so that the problem that heat at a high-temperature segment of the crude synthesis gas produced in the coal gasifying reaction cannot be used is solved; moreover, heat can be supplied to yellow phosphorus production, and the energy utilization rate is high; meanwhile, a reaction product CO produced during yellow phosphorus production and the crude synthesis gas are taken as raw materials of synthesis ammonia, so that the yield of liquid ammonia is increased, and a production process is efficient and contributes to energy saving and environment protection. The chemical co-production equipment for the phosphorus and coal comprises a raw material storing-transporting unit, a grinding unit, a pelletizing-drying unit, a reducing reaction unit, a slag cooling unit, a separating-washing unit, an air separating unit, a gasifying unit, a converting unit, a purifying unit and a synthesizing unit. The chemical co-production equipment and method have the advantages of simplified process flow, technically mature in units, energy saving, environmental friendliness and low application risk, and a beneficial technical option is provided for phosphorus and coal chemical complementation in various fields.

The invention provides an electric furnace for producing Cr13 series stainless steel and a smelting control method for a refining furnace, wherein the process flow of the control method is as follows:raw material preparation - electric furnace trough type tapping - VOD blowing process - refining furnace process - molding process. The invention has the following beneficial effect: the lectric furnace for producing the Cr13 series stainless steel and the smelting control method for the refining furnace provided by the invention have the following advantages: the Cr element metal yield of the prepared Cr13 series stainless steel is greater than or equal to 95%, and compared with the prior art, the smelting time is shortened by more than 30min ; the smelting cost of Cr13 series stainless steel is greatly reduced, avoids genearating aluminum-chromium spinel inclusions in molten steel, has a significant improvement on the purity of molten steel, and can meet the increasingly quality requirement of stainless steel products in the downstream industries of steel enterprises.

The invention discloses equipment and a method for producing yellow phosphorus from middle-low-grade phosphate ore. The yellow phosphorus production equipment can be used for preparing the yellow phosphorus from the middle-low-grade phosphate ore, further improves an energy utilization efficiency and effectively controls pollutant generation at the same time. The yellow phosphorus production equipment comprise a grinding unit, a ball making and drying unit, a reduction reaction unit, a furnace slag cooling unit and a separating and purifying unit, wherein the grinding unit comprises a grindingdevice and an air conveying device; the ball making and drying unit comprises a mixer, a ball making machine and a drying machine; the reduction reaction unit comprises a high temperature flue gas generation furnace and a reaction phosphorus furnace; the separating and purifying unit is communicated with the reaction phosphorus furnace, the high temperature flue gas generation furnace and the furnace slag cooling unit; the furnace slag cooling unit is communicated with the ball making and drying unit. The invention further discloses the method for producing the yellow phosphorus from the middle-low-grade phosphorus ore. According to the equipment, heat contained in CO and high temperature furnace slag is comprehensively utilized, and a part of fuel is supplemented at the same time, so that the energy utilization efficiency is improved.

The invention discloses a vertical heat accumulating type reduction furnace, relating to metal magnesium and metal calcium melting, in particular to a vertical metal magnesium and metal calcium reduction furnace. The vertical heat accumulating type reduction furnace is characterized by comprising a reduction furnace body, a heating device, a fuel and combustion supporting gas introducing-in device and a reducing reaction tank in a vertical pipe shape, wherein the center of the reducing tank body between a reducing-tank sealing member and a taper-shaped crystallizer is coaxially provided with a vertical through pipe of which the side wall is provided with a through hole. The vertical heat accumulating type reduction furnace disclosed by the invention has the advantages of short construction period and high speed of becoming effective. The vertical heat accumulating type reduction furnace body is supported by a concrete or steel structure bracket; the furnace structure is not complex and is convenient to build and install. The steps of loading, taking the crystallizer and deslagging can be mechanically and quickly operated to save labor force cost. Hot airflow rises in the hearth, which is favorable for carrying out a reduction reaction and ensures that a reduction period is shortened. Compared with a lateral tank reduction furnace, the vertical heat accumulating type reduction furnace has the advantage of saving more energy.

The invention discloses a purifying process for synthesizing graphite core column for industrial diamonds; by making use of the ability of carbon in graphite to reduce at high temperature, pre-evacuating, degassing and dewatering at held temperature are carried out, air and adsorbed water in pores of a graphite core column are discharged, the temperature is raised to 1045+/-15 DEG C, vacuum degree is maintained stably between 120-240 Pa, reaction reaches deep in metal oxides by the aid of permeability of carbon monoxide gas, and reducing is more thorough. The process saves electricity since a pump is stopped at high temperature and reducing time is shortened; by providing conditions and using self-produced gas to replace reducing gas to be charged, resources are saved, and impurities are not introduced; the process provides thorough and effective purification, is high in efficiency and has huge economic benefit.

The invention discloses a method for recycling valuable metals from waste lithium ion batteries, and belongs to the technical field of waste battery recycling. The method comprises the following steps: (1) charging a waste lithium ion battery; (2) crushing the charged battery, and sorting the materials to obtain a mixture of a positive electrode material and a negative electrode material; (3) calcining the mixture of the positive electrode material and the negative electrode material at high temperature; (4) putting the calcined material into water, performing stirring, performing filtering, adding sodium carbonate into the filtrate to obtain lithium carbonate, and taking the filter residue as a metal simple substance and an oxide thereof. Part of lithium ions are transferred to the negative electrode material through charging, and then the lithium and other metals can be recycled through simple processes such as calcination and water leaching of the positive electrode and negative electrode mixture. The method is simple, effective and suitable for large-scale production.