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63805 results about "Slag" patented technology
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Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore. Slag is usually a mixture of metal oxides and silicon dioxide. However, slags can contain metal sulfides and elemental metals. While slags are generally used to remove waste in metal smelting, they can also serve other purposes, such as assisting in the temperature control of the smelting, and minimizing any re-oxidation of the final liquid metal product before the molten metal is removed from the furnace and used to make solid metal. In some smelting processes, such as ilmenite smelting to produce titanium dioxide, the slag is the valuable product instead of the metal.
Method and apparatus for producing synthesis gas from carbonaceous materials
A method of producing syn gas from biomass or other carbonaceous material utilizes a controlled devolatilization reaction in which the temperature of the feed material is maintained at less than 450° F. until most available oxygen is consumed. This minimizes pyrolysis of the feed material. The method and apparatus utilizes the formed synthesis gas to provide the energy for the necessary gasification. This provides for a high purity syn gas and avoids production of slag.
Owner:JBK EXTRACTIONS
Selective laser melting / sintering using powdered flux
InactiveUS20130136868A1TurbinesRadiation applicationsSelective laser meltingSelective laser sintering
An additive manufacturing process (110) wherein a powder (116) including a superalloy material and flux is selectively melted in layers with a laser beam (124) to form a superalloy component (126). The flux performs a cleaning function to react with contaminants to float them to the surface of the melt to form a slag. The flux also provides a shielding function, thereby eliminating the need for an inert cover gas. The powder may be a mixture of alloy and flux particles, or it may be formed of composite alloy / flux particles.
Owner:SIEMENS ENERGY INC
Slag oil hydro-demetallization catalyst and its preparing method
ActiveCN1782031AImprove performanceEasy to operateRefining to eliminate hetero atomsAluminum CarbonateAlumina hydrate
The slag oil hydrodemetallizing catalyst contains a kind of double-peak hole alumina carrier and supported Mo and / or W and Ni and / or Co metal components. The double-peak hole alumina carrier has pore volume of 0.8-1.6 ml / g, specific surface area 150-350 sq m / g, pore volume fraction of 10-30 nm size holes in 40-90 % and pore volume fraction of 100-2000 nm size holes in 10-60 %, and is prepared through mixing alumina hydrate and ammonium aluminum carbonate, forming and roasting. The slag oil hydrodemetallizing catalyst has simple preparation process and high hydrodemetallizing performance.
Owner:CHINA PETROLEUM & CHEM CORP +1
Synthesis-reactivation technique for preparing inorganic coagulation material
InactiveCN1990413ASimple processImprove adjustabilitySolid waste managementSlagBiological activation
The invention relates to a process of preparing inorganic cementing material. It comprises following steps: mixing industrial slag, silicon-containing material, lime, plaster, addictive and water according to a certain proportion; pressing mixed material or compressing it into briquetting, maintaining naturally for thorough reaction, heat treating for activation under 450-850 Deg. C, adding addictive and grinding until sifting leaves is less than 15% with screen of 80 um, and getting inorganic cementing material, which is used as special cement or expansive agent. The invention is characterized by good physical property, stable volume, long durability and workability, low energy consumption and cost and environmental friendly.
Owner:尹小林
Multiple plasma generator hazardous waste processing system
Owner:PLASCO ENERGY GROUP INC
Gasification system with processed feedstock/char conversion and gas reformulation
ActiveUS20110036014A1Gasifier mechanical detailsEnergy based wastewater treatmentVitrificationSyngas
The invention provides a system designed for the complete conversion of carbonaceous feedstock into syngas and slag. The system comprises a primary chamber for the volatilization of feedstock generating a primary chamber gas (an offgas); a secondary chamber for the further conversion of processed feedstock to a secondary chamber gas (a syngas) and a residue; a gas-reformulating zone for processing gas generated within one or more of the chambers; and a melting chamber for vitrifying residue. The primary chamber comprises direct or indirect feedstock additive capabilities in order to adjust the carbon content of the feedstock. The system also comprises a control system for use with the gasification system to monitor and regulate the different stages of the process to ensure the efficient and complete conversion of the carbonaceous feedstock into a syngas product.
Owner:PLASCO CONVERSION TECH INC
Laser-based method and system for processing targeted surface material and article produced thereby
InactiveUS20060000814A1Prevent unwanted changesSufficient total fluenceAdditive manufacturing apparatusSemiconductor/solid-state device detailsTarget surfaceSlag
A laser-based method and system for processing targeted surface material and article produced thereby are provided. The system processes the targeted surface material within a region of a workpiece while avoiding undesirable changes to adjacent non-targeted material. The system includes a primary laser subsystem including a primary laser source for generating a pulsed laser output including at least one pulse having a wavelength and a pulse width less than 1 ns. A delivery subsystem irradiates the targeted surface material of the workpiece with the pulsed laser output including the at least one pulse to texture the targeted surface material. The pulsed laser output has sufficient total fluence to initiate ablation within at least a portion of the targeted surface material and the pulse width is short enough such that the region and the non-targeted material surrounding the material are substantially free of slag.
Owner:ELECTRO SCI IND INC
Activated aluminosilicate binder
An activated aluminosilicate binder containing aluminosilicates, calcium sulphate and an activator containing alkali metal salts is disclosed. The aluminosilicates are selected from a group consisting of blast furnace slag, clay, marl and industrial by-products, such as fly ash, and has an Al2O3 content greater than 5% by weight. Blast furnace slag is present in an amount less than 35% by weight, and cement kiln dust, in an amount of from 1 to 20% by weight, is added to the mixture as an activator.
Owner:HOLCIM
Process for abstracting earth silicon, oxide of alumina and gallium oxide from high-alumina flying ash
ActiveCN101284668AReduce the total massLow firing temperatureGallium/indium/thallium compoundsSilicon oxidesChemical industryFiltration
A method for extracting silicon dioxide, alumina and gallium oxide from high-alumina fly ash relates to the technology fields of environmental mineralogy and material, chemical industry and metallurgy. The method comprises the main steps as follows: causing the high-alumina fly ash to react with sodium hydroxide solution; filtering the solution; introducing CO2 to the filtrate for full gelation; cleaning, purifying, drying, grinding and calcining the silica gel after gel filtration to obtain finished white carbon black; adding limestone and a sodium carbonate solution into the filter mass after the reaction and filtration of the high-alumina fly ash and the sodium hydroxide solution; ball grinding the mixture into raw slurry; dissolving out the clinker obtained by baking the raw slurry; subjecting the filtrate to deep desiliconization to obtain sodium aluminate extraction liquid; filtrating the sodium aluminate extraction liquid after subjecting the sodium aluminate extraction liquid to carbon dioxide decomposition; baking the aluminum hydroxide after washing the filter mass to form the aluminum hydroxide product; and extracting the gallium oxide from the carbon dioxide decomposition mother solution and desiliconized solution. The method has the advantages of low material price, simple operating procedures, low investment, low production cost, low energy consumption and less slag.
Owner:TSINGHUA UNIV +1
Resource utilization process of organic hazardous waste
ActiveCN111185460AHarmlessAchieve reductionSolid waste disposalTransportation and packagingFluid phaseSlag
The invention discloses a resource utilization process of organic hazardous waste. The resource utilization process includes the steps that classified storage and treatment of solid-phase, solid-liquid mixing and liquid-phase organic hazardous waste are carried out; solid-phase crushing, grinding and screening treatment is carried out; solid-liquid mixing is carried out after solid-liquid separation, solid-phase grinding and liquid-phase sedimentation separation treatment is carried out; direct liquid-phase sedimentation is carried out; then after solid-liquid mixing, a fluxing agent is addedfor stirring, a stabilizer and a dispersing agent are added for slurrying, the slurry is fed into a gasifier, and the obtained gas is used as fuel gas after being subjected to cooling, dedusting, spraying and desulfuration; slag tapping and vitrification slag discharge are carried out; and waste water is recycled. The resource utilization process has the beneficial effects that solid phase, solid-liquid mixing and liquid-phase comprehensive treatment, harmless treatment and slag discharge are realized.
Owner:杰瑞邦达环保科技有限公司
Method for cleaning oil tank
The invention discloses a method for cleaning an oil tank. The method for cleaning the oil tank is characterized by adopting the following sequential steps under the totally closed condition: crude oil transporting, inert gas filling, homogenic oil cleaning, warm water cleaning, tank ventilating, tank slag removing and other pure physical and mechanical cleaning methods. After the method is adopted for cleaning, above 95% of residual oil in the tank can be recycled and reused, so the comprehensive benefit is obvious; the tank is cleanly and thoroughly cleaned, and even the metal can be seen; and the flame operation standard can be realized in the tank.
Owner:JEREH ENERGY SERVICES
Processing method of sewage in oil fields by using film evaporator
InactiveCN103420532AReduce processing costsReduce consumptionWaste water treatment from quariesMultistage water/sewage treatmentSlagWastewater
The invention discloses a processing method of sewage in oil fields by using a film evaporator. The processing method is characterized by comprising following technology steps: filtering sewage with a filtering device, removing oil by the air-floating method, separating and condensing sewage by the thin-film evaporating method, and processing residual slag, is mainly used for evaporating processing of sewage in oil fields, and is capable of continuously processing oil-containing sewage. The liquid phase and solid phase after being processed can be discharged without causing pollution to the environment.
Owner:JEREH ENERGY SERVICES
Thermally conductive cementitious grout for geothermal heat pump systems
A thermally conductive cement-sand grout for use with a geothermal heat pump system. The cement sand grout contains cement, silica sand, a superplasticizer, water and optionally bentonite. The present invention also includes a method of filling boreholes used for geothermal heat pump systems with the thermally conductive cement-sand grout. The cement-sand grout has improved thermal conductivity over neat cement and bentonite grouts, which allows shallower bore holes to be used to provide an equivalent heat transfer capacity. In addition, the cement-sand grouts of the present invention also provide improved bond strengths and decreased permeabilities. The cement-sand grouts can also contain blast furnace slag, fly ash, a thermoplastic air entraining agent, latex, a shrinkage reducing admixture, calcium oxide and combinations thereof.
Owner:THE UNITED STATES AS REPRESENTED BY THE DEPARTMENT OF ENERGY
Calcification vanadium slag sintering method
InactiveCN101161831AEasy temperature controlShorten roasting timeProcess efficiency improvementSlagCalcification
The invention discloses a method of vanadium slag direct entering high temperature roasting furnace calcify roasting, that is, high calcium vanadium slag or ordinary vanadium slag and lime or limestone are mixed uniformly without the gradual heating up process from low temperature to high temperature, the mixture enters into the roasting furnace of more than 600 DEG C for calcified roasting., the vanadium of the vanadium slag is changed into vanadium acid calcium, vanadium of the roasting clinker is dissolved into the solution under the leaching function of sulphuric acid solution, vanadium oxide and the like vanadium products are further made. The invention needs no gradual heating up process from low temperature to high temperature of the prior sodium treatment roasting, thereby reducing roasting time, improving productivity of unit and reducing production cost.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
Beneficiation method for recycling specularite
InactiveCN101428248AReduce consumptionReduce the number of equipmentDifferential sedimentationFlotationIronstoneSlag
Owner:SINOSTEEL MAANSHAN INST OF MINING RES
Method for comprehensively recycling valuable metals from spent lithium ion battery
ActiveCN107017443AThe pre-processing process is simpleHigh recovery rateWaste accumulators reclaimingProcess efficiency improvementVulcanizationSlag
The invention discloses a method for comprehensively recycling valuable metals from a spent lithium ion battery. The method comprises the following steps: carrying out electric discharge treatment on a spent battery, crushing, pre-roasting at 300-400 DEG C, adding a reducing agent, and carrying out reduction roasting at 450-700 DEG C; carrying out water extraction and evaporative crystallization on fine aggregates obtained through the reduction roasting, so as to obtain a high-purity lithium product, leaching copper, nickel and cobalt from leached slag and roasted lump materials by virtue of ammonia oxide, carrying out magnetic separation and sieving on ammonia leaching slag so as to obtain iron and aluminum enriched products, and carrying out reduction acid leaching, purification and edulcoration on sieved products, so as to obtain a high-purity manganese sulfate solution; and carrying out extraction and selective reverse extraction on ammonia leaching liquid, so as to obtain a high-purity nickel sulfate solution and a high-purity copper sulfate solution, and carrying out vulcanization cobalt precipitation, oxidation acid leaching and extraction purification on raffinate, so as to obtain a high-purity cobalt sulfate solution. The method is high in extraction rate of valuable metals and applicable to the treatment of multiple waste lithium ion battery raw materials and efficient utilization of multiple elements, and sorting is not required.
Owner:GUANGDONG GUANGHUA SCI TECH
Carbon Dioxide Sequestration in Foamed Controlled Low Strength Materials
A process for sequestering carbon dioxide from the exhaust gas emitted from a combustion chamber is disclosed. In the process, a foam including a foaming agent and the exhaust gas is formed, and the foam is added to a mixture including a cementitious material (e.g., cement-kiln dust, lime kiln dust, or slag cement) and water to form a foamed mixture. Thereafter, the foamed mixture is allowed to set, preferably to a controlled low-strength material having a compressive strength of 1200 psi or less. The carbon dioxide in the exhaust gas reacts with hydration products in the controlled low-strength material and in turn sequesters the carbon dioxide.
Owner:WISCONSIN ELECTRIC POWER
Recycling method for valuable metal from waste nickel-cobalt-manganese lithium ion battery
InactiveCN107653378AReduce lossesLess investmentWaste accumulators reclaimingProcess efficiency improvementSlagManganese
The invention relates to a method for recycling valuable metal from a waste nickel-cobalt-manganese lithium ion battery. The method comprises the following steps of: dismounting, discharging and crushing the battery, soaking crushed waste nickel-cobalt-manganese lithium ions into sulfuric acid with certain concentration, adding a reducing agent to strip positive and negative pole pieces, and leaching valuable metals of nickel, cobalt, manganese and lithium; and replacing leach liquor with iron powder to remove copper, carrying out hydrolyzing to remove iron and aluminum, and dosing an impurity-removed solution to synthesize an aluminum coated nickel, cobalt and manganese ternary positive electrode material precursor, evaporating and concentrating the synthesized solution, adding carbonateor introducing carbon dioxide to recycle lithium. According to the method disclosed by the invention, stripping and leaching are synchronously completed, chemical precipitation is performed to removecopper, iron and aluminum, slag amount is small, slag filter performances are good, and the impurity-removed solution is used for synthesizing the aluminum coated nickel, cobalt and manganese ternaryprecursor, so that the recovery rate of valuable metal is increased; and the recovery rate for nickel, cobalt and manganese is 96% or higher in the whole process, the total recovery rate of lithium is90% or higher, the technological process is short, operation is simple, equipment is less, and the cost is low.
Owner:JINCHUAN GROUP LIMITED +1
High-strength and high-toughness reactive powder concrete of carbon doped nano-tube and preparation method of high-strength and high-toughness reactive powder concrete
The invention provides high-strength and high-toughness reactive powder concrete of a carbon doped nano-tube. The high-strength and high-toughness reactive powder concrete is prepared by taking cement, a carbon nano-tube, silica fume, a water reducing agent, silica sand, coal ash, quartz powder, steel fiber and water as raw materials, wherein all the components in the mixture are calculated in parts by mass: 1000-1200 parts of cement, 250-350 parts of silica fume, 250-350 parts of slag powder, 40-50 parts of water reducing agent, 1200-1400 parts of silica sand, 180-230 parts of water, 190-230 parts of steel fiber, 180-250 parts of coal ash, 80-120 parts of quartz powder, 0.1-5 parts of carbon-nano-tube dispersing agent and 1-10 parts of carbon nano-tube powder. The invention also provides a preparation method of the high-strength and high-toughness reactive powder concrete. The reactive powder concrete obtained by the invention has the high compression strength of 250-300MPa and breaking strength of 45-60MPa, which are higher than the 200-level related performances of the traditional RPC (Reactive Powder Concrete). Meanwhile, the initial cracking strength of the reactive powder concrete material prepared by using the carbon nano-tube is greatly improved and is up to 10MPa in a direct stretching state, and the tensile strain corresponding to peak stress is up to more than 0.5%, so that the toughness and strength of the traditional RPC material are greatly improved.
Owner:浙江固邦新材料有限公司
Ectopic leaching restoring device and restoring method for chromic slag polluted soil
ActiveCN102601106AContinuous operationRealize emergency handlingContaminated soil reclamationAutomatic controlSlag
The invention relates to an ectopic leaching restoring device and a restoring method for chromic slag polluted soil. The device is provided with an integrated soil leaching and dewatering system and mainly comprises a feeding system, a soil leaching-dewatering system, a waste gas treating system, an elution collecting treating system and an automatics control system. The chromic slag polluted soil firstly enters a reaction tank leaching section through the feeding system; a chrome-containing component in the soil is transferred into a liquid phase of a leaching agent; the liquid phase is rotated following a spiral stirring thruster; a muddy water mixture is conveyed into a reaction tank dewatering section; the filtrate is discharged through a tank wall with a water-permeable filtering function; the remained soil is conveyed to a mud discharging device following the rotating of the spiral stirring thruster; and lastly, the soil after being leached and dewatered is discharged. The device provided by the invention has the advantages that a power source is utilized to realize the soil leaching and muddy water separating, the energy consumption is low, the structure is simple, the use is convenient, the treating efficiency is high, and the purified degree of the polluted soil after being treated by using the device is above 85%.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Composite tailing non-fired and non-steamed building block brick and preparation method thereof
InactiveCN102093004AHigh waste rateSolve the problem of excessive dosageSolid waste managementBrickSlag
The invention discloses a composite tailing non-fired and non-steamed building block brick and a preparation method thereof. The brick comprises the following raw materials in parts by weight or volume: 50-300 parts of tailing and 3-30 parts of cement; and at least two components are selected from the active wastes such as fly ash, coal gangue, shale slag, alkaline residue, carbide slag, chemical gypsum and the waste residue of metallurgical industry to be mixed with the raw materials. The preparation method comprises the following steps: mixing to stir, compressing and shaping, performing natural curing or utilizing the solar heaing hydrating maintenance to prepare the composite tailing building block brick. By adopting the preparation method of the invention, the single performances of the tailings and slags can be changed, thus the product can have higher strength and quality owning to the interaction of materials; the technology does not adopt firing and steaming, the cost is low; different sizes of solid bricks, perforated bricks, hollow blocks, floor tiles, grass planting bricks, roadside bricks and artistic rails can be prepared by changing the mould; and various harmful slags such as tailings can become good, the Chinese development direction of the comprehensive utilization of resources is satisfied and the brick of the invention has development and application prospect.
Owner:郭东京 +2
Arsenic-containing waste slag solidified body and preparation method thereof
InactiveCN102249609ASimple curing processLow costSolid waste managementSolid waste disposalArsenic pollutionSlag
The invention relates to an arsenic-containing waste slag solidified body and a preparation method thereof, and belongs to the technical field of environmental protection. The preparation method comprises the following steps of: treating arsenic-containing waste slag, mixing the treated arsenic-containing waste slag and a curing agent prepared from industrial waste slag and a mineral activated material, a modifying agent, aggregates, water and the like, and stirring, forming and curing the mixed materials to obtain the solidified body with high strength and low arsenic leaching rate. Comparedwith the prior art, the solidification process is simple, low in cost, safe and reliable, and solves the problem of arsenic pollution of the arsenic-containing waste slag.
Owner:KUNMING UNIV OF SCI & TECH +1
Low-temperature ceramic permeable bricks and production method thereof
InactiveCN101289310ASolve pollutionLow costCeramic materials productionClaywaresNatural resourceState of art
The invention relates to a low temperature ceramics non-watertight brick made of solid waste slag and a manufacture method thereof, belonging to the technical field of building materials. The mixture ratio by weight of the components of the low temperature ceramics non-watertight brick is that waste slag gelled material to waste slag skeletal material to porogenic agent to activating agent to addition agent to paint to water is equal to 100:200-800:0.1-40:13-50:0.2-3.0:0.1-7.0:1-20. After the process, mixture, vibrating forming and maintenance process for the raw materials, the raw materials are prepared into the low temperature ceramics non-watertight brick with a filled pore by taking the low temperature ceramics mineral as the matrix phase and taking the inorganic waste slag particle as the wild phase. Compared with the prior art, the low temperature ceramics non-watertight brick has the advantages of high strength, good permeability of water, high salvage value, simple process, low cost, environment protection and natural resources reservation, etc. which can be widely applied to the laying of urban highways.
Owner:KUNMING UNIV OF SCI & TECH
Deposition of superalloys using powdered flux and metal
A method for depositing superalloy materials. A layer of powder (14) disposed over a superalloy substrate (12) is heated with an energy beam (16) to form a layer of superalloy cladding (10) and a layer of slag (18). The layer of powder includes flux material and alloy material, formed either as separate powders or as a hybrid particle powder. A layer of powdered flux material (22) may be placed over a layer of powdered metal (20), or the flux and metal powders may be mixed together (36). An extrudable filler material (44) such as nickel, nickel-chromium or nickel-chromium-cobalt wire or strip may be added to the melt pool to combine with the melted powder to give the superalloy cladding the composition of a desired superalloy material.
Owner:SIEMENS ENERGY INC
Method for recycling iron on line from iron-containing industrial slag and preparing glass ceramics frit
InactiveCN101914639AGuaranteed slag compositionRecycling and recovery technologiesProcess efficiency improvementMaterials preparationSlag
The invention relates to a method for recycling iron on line from iron-containing industrial slag and preparing a glass ceramics frit, belonging to the technical field of resource comprehensive utilization and material preparation and mainly comprising a two-step method process of iron-containing industrial slag online rough adjustment and modification for reducing iron and fine adjustment and modification for preparing the frit. The method comprises the steps of: discharging high-temperature iron-containing slag into a high-temperature furnace device, and simultaneously adding a reducing agent and a modifying agent to ensure that slag components are adjusted to reach the optimal component point in which iron oxide is reduced; after fully reacted, separating reduced molten iron from the slag, and recycling to obtain high-temperature molten iron; further adding a modifying agent and an adjusting agent into the slag remained after the separation to ensure that the slag components are adjusted to achieve the quality requirement of slag glass ceramics on the frit; and water-hardening, drying and grading the qualified slag to prepare the glass ceramics frit. The invention realizes multiple purposes that the heat of the slag is directly utilized and metal iron is recycled to prepare a high addition value product as well as solid wastes are massively utilized, and the like.
Owner:UNIV OF SCI & TECH BEIJING
Use of high carbon coal ash
InactiveUS6755905B2Avoid insufficient heatingReduce flowCharge manipulationHandling discharged materialSlagHigh carbon
A synthetic slag is produced by a high temperature combustion reaction between coal ash having a high carbon content, and a source of lime such as cement kiln dust. The carbon content of the coal ash is oxidized by oxygen gas, which typically is derived from air or an air / oxygen combination in an exothermic reaction and the heat generated is exploited in the melting process. In this way the gaseous products will typically comprise nitrogen, unreacted oxygen and carbon dioxide, and heat energy can be readily recovered from the hot off gas products evolving during the combustion reaction. The synthetic slag may be pelletized and employed as lightweight mineral aggregate or milled to cement fineness to provide slag cement.
Owner:LAFARGE CANADA INC
Method for extracting tungsten, titanium and vanadium from waste SCR (selective catalytic reduction) catalyst
InactiveCN102936049ASolve the pollution of the environmentLow equipment requirementsTungsten oxides/hydroxidesTitanium dioxideSlagStrong acids
The invention discloses a method for extracting tungsten, titanium and vanadium from a waste SCR (selective catalytic reduction) catalyst, which comprises the following steps: crushing the waste SCR catalyst, adding a strongly alkaline solution, and reacting; filtering, separating, then adding strong acid into the sodium tungstate and sodium vanadate mixed solution, and reacting to obtain tungstic acid and a sodium salt and vanadic acid mixed solution; regulating the pH value of the sodium salt and vanadic acid mixed solution until precipitate is separated out, thus obtaining ammonium vanadate; then adding sulfuric acid into the tungsten-and-vanadium-removed SCR catalyst, and reacting to obtain a titanyl sulfate solution and solids such as aluminum slag and the like; then adding water into the titanyl sulfate solution, and hydrolyzing to obtain titanic acid and a waste acid solution; and finally, respectively calcining the obtained ammonium vanadate, tungstic acid and titanic acid to obtain vanadium pentoxide, tungsten trioxide and titanium dioxide. According to the invention, tungsten, titanium and vanadium can be extracted from the SCR catalyst through the reaction with strong alkali and strong acid at a low temperature, the equipment requirement is low, the energy consumption is low, some products having added values can be coproduced, and no secondary pollution is generated, thereby facilitating popularization and application.
Owner:成都新智金森环保科技有限公司
Method for producing vanadium pentoxide by utilizing vanadium slag
The invention discloses a process for producing vanadic anhydride by vanadium slag. The steps of the process comprise as follows: a, adding alkali metal salt in the vanadium slag, and mixing with each other uniformly, a mixture is obtained. b, laying the mixture obtained by step a into a calcining furnace to oxidize and calcine, vanadium slag grog is obtained. c, the calcined vanadium slag is discharged out of the furnace, fast cooling and performing water immersion. d, filtering the mixture obtained by step c, filter liquor is obtained. e, removing impurities in the filter liquor. f, adjusting the pH value of the filter liquor obtained by step e, adding ammonium salt to precipitate vanadium and filtering the filter liquor, then, ammonium peroxovanadate filter cake and ammonium metavanadate filter cake are obtained. g, calcining the filter cake after vanadium precipitation obtained by step f, and vanadic anhydride is obtained, wherein the content of the vanadic anhydride in the vanadium slag used in step a is 2.0%-8.0%. The invention has the advantages of simple and easy, low facility request, convenient operation and low cost, further, the residual quantity of the vanadic anhydride in waste slag is 0.55%-1.0%, which has fine economic benefit and social benefit.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
Manual thermit welding electrode and preparation and using methods thereof
ActiveCN101444876AFirmly connectedEasy to weldWelding/cutting media/materialsAlumino-thermic welding apparatusSlagEngineering
The invention discloses a manual thermit welding electrode and preparation and using method thereof which belong to the technical field of welding. A welding compound of the welding electrode comprises a thermit, a slag forming constituent and an alloying agent. Raw materials are weighed according to the proportion and arranged in a ball mill, a grinding ball and a milling medium are added, and the welding compound is obtained by drying after wet grinding; the welding compound is filled in a cylinder which is made of paper, a lead wire is arranged at one end of the cylinder, and the other end is sealed by a plastic plug, thereby forming the thermit welding electrode; the welding electrode is arranged in a sleeve which is made of paper and sealed for preservation. When in use, the sleeve is fixed on the plug at the back end of the welding electrode, the sleeve is held by a hand, and the lead wire at the front end of the welding electrode is ignited, and then the manual welding or cutting operation can be carried out. The welding electrode is small, lightweight and portable, the welding and the cutting operations are simple, rapid and safe, the welding and the cutting operations can be carried out anytime and anywhere, and the welding electrode can be applied in the welding and the cutting of steels, stainless steels or copper alloy materials.
Owner:TSINGHUA UNIV
Lightweight high-performance foam concrete and preparation method thereof
ActiveCN104108912AHigh CaO contentHigh glass bead contentSolid waste managementCeramicwareFoam concreteFiber
The invention discloses a lightweight high-performance foam concrete, which is composed of the following components in parts by weight: 50 to 60 parts of cement, 20 to 35 parts of mineral slag, 15 to 20 parts of fly ash, 5 to 10 parts of gypsum, 60 to 80 parts of fine aggregate, 2.7 to 7.3 parts of additive, 0.1 to 0.2 part of fiber, 32 to 45 parts of water, and 5 to 25 parts of foam. The invention also discloses a preparation method of the foam concrete. The foam concrete has the advantages of small volume-weight, high strength, low water absorption, and small contraction rate, and has the waterproof and anti-cracking functions at the same time.
Owner:GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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