113 results about "Slag" patented technology

The invention discloses a benefication method for recovering specularite. The method comprises the processes of primary grinding, grading, primary low intensity magnetic separation, and tailings discarding by primary high intensity magnetic separation; rough concentrate pre-classification by the primary low intensity magnetic separation and the primary high intensity magnetic separation, secondary grinding, secondary low intensity magnetic separation to obtain concentrates, secondary high intensity magnetic separation to obtain concentrates; and selective flocculation desliming secondary conducted on high intensity magnetic separation tailings (middlings), and anionic reverse flotation. The method further comprises the step of arranging a cylindrical slag separating sieve before the primary high intensity magnetic separation. With the advantages that the iron concentrate grade and the iron recovery are high, the loss of granular iron minerals is low, the mineral process flow is short, concentrates and tailings can be obtained in advance and the energy consumption of the benefication is low, the invention can be used not only for selecting specularite ores, but also for selecting weakly magnetic iron minerals, such as hematite, goethite, siderite, limonite, and the like.

The invention discloses a roadside proper yielding unequal combined filling structure of gob-side entry retaining and a construction method. An upper-layer filling body of the filling structure is accumulated by gangue bags; a mixture of water, cements and crashed gangues is filled in the gangue bag; a lower-layer filling body is a filling plaster wall; the filling plaster wall is formed by a mixture of water, cements, waste plasters, blast furnace slags, waste limes, coal ashes and gangue powders. By adjusting the filling height and the preparation proportion of the two filling bodies, the structure provided by the invention can ensure the contractibilities of the filling bodies to be in a reasonable range, thus the filling bodies can better adapt to the movement rule of the hard roof strata and guarantee the stability of the gob-side entry retaining.

The invention provides a synergetic metal recycling method for nickel and cobalt containing waste batteries and copper containing electronic waste. The preliminarily smashed and metal element enriched waste batteries and the copper containing electronic waste are mixed, and a slag former and a reducing agent in a certain ratio are blended for an oxidative reducing reaction; relatively active metal iron, aluminum and the like in the reaction process form oxide to enter an upper layer slag phase; metal cobalt and nickel enter copper liquid on the bottom layer, and therefore the metal phase and a slag phase are separated, and metal containing copper, cobalt and nickel is obtained; and copper, cobalt, nickel and other high-purity metal are recycled through electrorefining. The method is short in flow, high-temperature thermometallurgy is adopted for synergetically recycling the valuable metal in the batteries and the electronic waste, and the problems that traditional waste battery wet recycling efficiency is low, the environment is polluted, a large amount of lixivium needs to be used, and a large amount of acid and alkaline is consumed are avoided; and an efficient novel recycling way is provided for waste ternary battery and electronic waste resource recycling, and good industrial application prospects are achieved.

The high strength compact zirconia-chromia corundum brick is produced with corundum, zirconia material, chromia material and binding agent. The material consists of compact corundum 10-80 wt%, brown corundum 0-60 wt%, zirconia material 1-25 wt%, chromia material 3-40 wt% and binding agent 1-12 wt%. The high strength compact zirconia-chromia corundum brick has high strength high heat shock stability, high slag corrosion resistance and high heat resistance.

Ultrahigh-toughness concrete and a preparing method thereof are disclosed. The concrete is prepared from, by weight, 380-580 parts of cement, 150-170 parts of slag powder, 250-380 parts of fly ash, 200-400 parts of quartz sand, 13-15 parts of bamboo wood phenolic alcohol liquified resin, 13-18 parts of polypropylene resin, 0.5-1.5 parts of carboxymethylcellulose, 23-47 parts of core-shell acrylic acid elastic emulsion, 5-10 parts of a chemical-resistant modifier, 14-18 parts of bamboo fibers, 2.5-8.5 parts of nanometer silicon particles, 7-13 parts of nanometer calcium carbonate, 3-5 parts of anionic polyacrylamide, 3.7-8.3 parts of poly(diallyldimethylammonium chloride), 0.4-1 part of poly(ethylene glycol) acrylate, 20-30 parts of an acrylic emulsion, and the like. The ultrahigh-toughness concrete has high tensile strength, high compressive strength, ultrahigh ductility, good energy consumption capacity and good elastic modulus.

The invention discloses dry-mixed pre-mixed mortar prepared by alkali activated slag cement, and a preparation method thereof. The dry-mixed pre-mixed mortar includes dry-mixed masonry mortar, dry-mixed plastering mortar and dry-mixed screeding mortar; the dry-mixed pre-mixed mortar is prepared by the following raw materials by weight: 10-30 parts of slag, 0.5-2 parts of excitant, 0-8 parts of mineral admixture, 70-85 parts of aggregate and 0.1-1 part of functional additivs. The preparation method thereof comprises the following steps: step (1) of grinding slag powder until specific surface area is 350-400 m<2>/kg; step (2) of weighing various components by weight in part; step (3) of putting various components weighed in the step (2) into a blender mixer at constant temperature by constant pressure, and mixing for 5-10 min to obtain dry-mixed pre-mixed mortar. The preparation method provided by the invention can prepare dry-mixed pre-mixed mortar by using alkali activated slag cement instead of portland cement so as to save cost, reduce resource consumption and reduce environmental pollution.

The invention discloses a cold burden laying method and a casting starting technology of sizing-nozzle open type continuous casting billets. Crystallizer oil is firstly smeared before casting; a dummy bar where a dummy ingot hook and a cover plate are hooked is conveyed into a crystallizer; a gap is filled with heat-insulating materials; and then a broken steel drop layer, a cocoon-shaped cold burden layer and bowl-shaped cold burdens are sequentially laid. A crystallizer vibration mechanism, secondary cooling water and a draught fan are started. A ladle slide gate is opened, and molten steel is injected into a tundish. When the molten steel surface is 300-400 mm high, casting of the tundish starts; and after flames come up on the crystallizer for 4-5 s, casting starts when the molten steel surface rises to the position 250-350 mm away from an upper opening of the crystallizer. The starting pulling speed is 0.5 m/min; the speed is increased by 0.5 m/min every other 1-2 s; the pulling speed is increased to 2.5-2.8 m/min; the molten steel surface reaches the position 140-160 mm away from the upper opening of the crystallizer; and after the pulling speed is normal, slag fetching operation is performed in time. The cold burden laying method and the casting starting technology avoid the sputtering danger, waste and loss in the molten steel casting process; and the technical problems that because cold burden laying is not reasonable, pulling leakage is caused, and a dummy ingot hook head, the cold burdens and billet heads are not combined properly are solved.

The invention provides a roasting-leaching method of fine vanadium slags. The roasting-leaching method includes the following steps: providing the fine vanadium slags; adding sodium carbonate in the fine vanadium slags to obtain roast mixture; roasting the roast mixture at the temperature of 700-850 DEG C to obtain a roast material containing sodium vanadate; water-quenching the roast material to under 100 DEG C; ball-milling the roast material after water quenching to obtain sizing agent; water-leaching the sizing agent to obtain leach sizing agent; and filtering the obtained leach sizing agent to obtain filter residue and lixivium containing the sodium vanadate. The roasting-leaching method at least has one of the following advantages: high efficiency, low cost, low energy consumption, safety and environment-friendly property.

The invention belongs to the technical field of waste head and complementary energy recovery in iron and steel Industry, and in particular relates to a method for preparing methanol by sensible heat of blast furnace slag. The method comprises the following steps: blast furnace slag enters into a sensible heat recovery device; reactants enter into a grain slag packed bed to be preheated, and enter into a graining reactor when the temperature reaches 600 DEG C; the reactants enter into the graining reactor for reaction at 850 DEG C and at one barometric pressure to generate methanol. High temperature residual heat resources of liquid blast furnace slag are efficiently, economically and environment-friendlily used in an energy-saving manner. Treated blast furnace slag can meet the demand of cement manufacturing, and methanol produced belongs to a product widely applied with high additional value. Ternary reforming reaction of methane can realize part of self-heat supply, so that the energy efficiency in the reaction process is greatly enhanced, the cost is lowered, and carbon deposited on the surface of the catalyst can be alleviated or even eliminated. Coke oven gas resource is adequately utilized, the energy resource is saved, carbon dioxide in flue gas is utilized, and emission of greenhouse gases is reduced, so that the method is energy-saving and environment-friendly.

The invention relates to a self-protection flux-cored welding wire for full-position and high-toughness welding. A flux core comprises the following components in percentage by weight: 2 to 7 percent of Mn, 3 to 6 percent of Ni, 1 to 10 percent of Al, 1 to 20 percent of Mg, 1 to 10 percent of carbonate, 10 to 60 percent of fluoride, 0.5 to 8 percent of TiO2, 0.5 to 6 percent of SiO3, and the balance of iron powder; and the flux core accounts for 16 to 30 percent of the total weight of the welding wire. The self-protection flux-cored welding wire has the advantages of good toughness and plasticity of weld metals, little splash and good full-position welding performance, and remarkably improves the slag detachability and weld formation property.

The invention discloses a degradable filter material biogas slurry filter and a filtering method of the degradable filter material biogas slurry filter. The degradable filter material biogas slurry filter comprises a box body, wherein a floating filter material filling hole and a fixed filter material filling hole are formed at the top of the box body, a liquid inlet is formed at the middle part of the box body, and a slag hole is formed at the bottom of the box body; the liquid inlet divides the inner cavity into a floating filter material chamber at the upper part of the liquid inlet and a sedimentation chamber at the lower part of the liquid inlet, a floating filter material is arranged inside the floating filter material chamber, the slag hole is communicated with the sedimentation chamber, and the floating filter material filling hole is communicated with the floating filter material chamber; and the fixed filter material filling hole is communicated with the floating filter material chamber by virtue of the fixed filter material chamber, a grid is arranged at a communication part, a fixed filter material is arranged inside the fixed filter material chamber, and the fixed filter material chamber is connected with a liquid outlet. By adopting the degradable filter material biogas slurry filter, flushing and back washing are not needed, the degradable filter material biogas slurry filter can stably operate for a long time while a filter material is supplemented periodically, and quality of filtered clear solution is stable and controllable.

The invention discloses a preparation method of oryzenin antioxidant peptide, comprising the following steps: (1) screening rice slag with a mesh of 50-200 meshes, and adding water according to the material and water weight ratio of 1:6-12 to be dipped for 10-15 minutes; (2) pouring rice slag feed liquid into a colloid mill to be ground for more than or equal to 2 minutes, and grinding rice slag particles in the feed liquid; (3) adjusting the pH of milled and homogenized feed liquid to 8.0-9.5, adding phosphate buffer, adding alkali protease 200U/g-600U/g rice slag, stirring and carrying out enzymolysis for 1-3 hours at the temperature of 40-65 DEG C, and controlling hydrolyzing degree to be 10-15wt%; (4) killing enzyme and carrying out centrifugal separation; (5) vacuum concentrating, freezing and drying. When adopted to prepare oryzenin antioxidant peptide, the invention has wide raw material resource and low manufacturing cost, the obtained oryzenin antioxidant peptide has high antioxidant activity and high edible safety.

A basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 μm; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Also, a gas generating composition which has a low toxicity, a high burning rate, and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate, and (c) a binder and/or a slag-forming agent.

The invention relates to a transmission of a manipulator for dredging slag from liquid zinc of a zinc pot, which comprises a saddle seat, a slag push plate, a slag shovel hopper, a saddle seat driver, a material hopper balancing pole device, a crank connecting rod and a crank connecting rod transmission mechanism. The crank connecting rod is connected with the slag shoveling hopper. The transmission is characterized in that the saddle seat driver is a rodless cylinder, a slag push plate connecting rod is connected with the rodless cylinder of the saddle seat, the crank connecting rod transmission mechanism is a cylinder type crank connecting rod transmission mechanism, and the material hopper balancing pole device is a double-rod type material hopper balancing pole device. The transmission has the advantages that power is reasonably distributed, various stresses are scientifically balanced, accordingly, the opening and closing slag dredging area of the manipulator for dredging slag is increased, a slag dredging range is expanded, the manipulator is opened and closed for slag dredging, collecting and discharging continuously, smoothly, stably and quickly, power transmission for operation in dangerous areas can be realized, and the manipulator has popularization and application values.

The invention relates to a production method of welding rod steel H08A and belongs to the technical field of ferrous metallurgy. The technical problems to be solved are that the continuous casting time is short in the production process of the welding rod steel H08A and a casting billet has obvious air bubble defects. According to the technical scheme, the production method of the welding rod steel H08A comprises steps of rotary furnace smelting, LF refining and continuous casting, wherein in the LF refining, a refining slag adjusting agent with principal components being Al, Al2O3 and CaO isadded for diffusion deoxidation, the degree of activity of oxygen in molten steel is controlled at 0.0020-0.0040%, the content of Als is 0.001-0.005%, silicoferrite is added with the content of Si controlled at 0.02-0.03%, and then calcium treatment is carried out. By establishing a reasonable molten steel control system, welding rod steel H08A continuous casting billets without internal defectscan be stably and continuously produced.

The invention provides a method for recycling rhenium from copper smelting smoke washing waste acid. The method includes the steps that A, the copper smelting smoke washing waste acid is filtered, and clear waste acid and selenium mud are obtained; B, the clear waste acid is mixed with a first precipitation agent to react, and copper-removed later liquid and copper-deposited slag are obtained; and C, the copper-removed later liquid is mixed with a second precipitation agent to react, rhenium-deposited later liquid and rhenium-rich slag are obtained, and in the clear waste acid, the copper content ranges from 0.2 g/L to 3 g/L; or the method includes the steps that A, the copper smelting smoke washing waste acid is filtered, and clear waste acid and selenium mud are obtained; and D, the clear waste acid is mixed with a precipitation agent to react, rhenium-deposited later liquid and rhenium-rich slag are obtained, and in the clear waste acid, the copper content is larger than 0 g/L and smaller than 0.2 g/L. According to the method, the high-copper waste liquid is subjected to copper and rhenium deposition step by step, the low-copper waste liquid is subjected to rhenium deposition in one step, only one kind of auxiliary material sodium thiosulfate is needed in the whole process, the copper recycling rate ranges from 95.3% to 99.8%, and the rhenium recycling rate ranges from 99% to 99.53%.

The invention provides a device and method for conducting superfast laser machining of an air film hole in a water jet environment. The device comprises a three-shaft moving workbench system, a superfast laser device, a water jet circulating device and a control system. A to-be-machined sample is fixed into a water container through a specific clamping device. The water container is fixed to a three-shaft moving workbench and connected with a water tank through a drainage pipe. Medium water is pumped out of the water tank through a water pump and flows through a water injection pipe and onto the surface of the to-be-machined sample through a water jet nozzle. Laser transmitted by the superfast laser device penetrates a water jet film and is focused onto the surface of the to-be-machined sample for machining. By means of the device and method, the advantages of traditional air and underwater laser perforating are combined; machining efficiency of superfast laser perforating is guaranteed, and microcracks on the surface of the to-be-machined sample and the inner walls of micro-holes are reduced; accumulated slag and a recasting layer are eliminated; and the geometrical morphology precision of the sample is improved.

Methods of enhancing the segregation roast through the use of microwave radiation and chloride ions are disclosed. The processes provide means of recovering metals trapped in ores and slags by reaction of these materials with carbon, chloride and water using microwave radiation as the primary energy source. The metals may be present in starting materials such as metallic sulfides, slags, metallic oxides such as laterites, magnetites, iron oxides, silicates and carbonates. The metals are reduced and can be recovered by separation from the gangue. Water, carbon and chloride can be recycled to the reaction to reduce costs.

The invention discloses a method and system for treatment of kiln slag including lead and zinc. The method includes the steps that (1) the kiln slag including lead and zinc is dried, so that a kiln slag dried material is obtained; (2) the kiln slag dried material, pulverized coal and binder are mixed, so that a mixed material is obtained; (3) the mixed material is subjected to pelletizing treatment, so that mixed pellets are obtained; (4) the mixed pellets are fed to a feeding zone of a rotary hearth furnace, the mixed pellets are reduced through a preheating zone and a high-temperature zone of the rotary hearth furnace in sequence, smoke dust containing silver, zinc oxide and lead oxide is exhausted from the preheating zone, and the obtained metallized pellets are discharged from a discharging zone; and (5) the metallized pellets are subjected to ore grinding magnetic separation treatment, and metal iron powder and tailings are obtained. By the adoption of the method, carbon, iron, lead, zinc and silver in the lead and zinc kiln slag can be recycled comprehensively; and moreover, the recovery rate of the iron can reach 80%, the volatilization rate of the zinc can reach 96%, the volatilization rate of the lead can reach 95%, and the volatilization rate of the silver can reach 90%.

The invention belongs to the technical field of refractory materials, and mainly provides a preparation method of a low-carbon aluminum-carbon refractory material for use in continuous casting. Polyborosilazane is taken as an additive, so that the high-temperature strength, oxidation resistance and erosion resistance of the low-carbon aluminum-carbon refractory material are improved; phenolic resin is taken as a bonding agent, and the adding amount of the phenolic resin is 4-6 percent by weight based on the total weight of the raw materials of the low-carbon aluminum-carbon refractory material; polyborosilazane is added into phenolic resin, and the adding amount of polyborosilazane is 3-7 percent by mass of phenolic resin. By adopting the method, the high-temperature strength, oxidation resistance and slag erosion resistance of a continuous cast low-carbon refractory material can be improved remarkably.

The invention relates to a high density total oxygen short process high-efficiency cleaning iron-making process. The high density total oxygen short process high-efficiency cleaning iron-making process mainly comprises the following steps: S1, uniformly mixing wide-grained iron ore powder, anthracite powder and slaked lime powder and then granulating; S2, putting the wide-grained carbon-containingpellet obtained in S1 into a rotary kiln for carrying out deep self-reduction; S3, dedusting, cooling and carrying out CO2 removal treatment on exhaust gas of the rotary kiln to obtain upgrading coalgas, and introducing the upgraded coal gas into the rotary kiln again for secondary combustion; S4, carrying out hot charging on the wide-grained metallized pellet obtained in S2 into a melting gasifier and carrying out final reduction melting; S5, respectively discharging slag and molten iron from the corresponding cinder notch and iron notch. The comprehensive energy consumption of the processis reduced by 30 percent compared with a traditional blast furnace process, the coal powder burnout ratio is greater than or equal to 90 percent, the concentration of reduction components is greater than or equal to 90 percent and the CO2 removal rate of the coal gas is greater than or equal to 90 percent; the coking, sintering and pelletizing procedures which have the maximum pollution emission of iron steel enterprises are eliminated, so that energy consumption and pollutant emission are reduced from the source.

The invention discloses a concrete expansive agent, which belongs to the technical field of concrete additives. The concrete expansive agent comprises the following raw materials in parts by weight: 20-30 parts of coal ash, 5-15 parts of gypsum powder, 5-15 parts of alumstone, 2-6 parts of aluminum oxygen chamotte, 10-30 parts of calcium sulphoaluminate, 4-12 parts of aluminum slag, 1-5 parts of calcium carbonate powder, 4-12 parts of nano aluminum titanate fiber, 8-16 parts of rosin rock ore sand, 5-15 parts of vermiculite power, 2-6 parts of polypropylene fiber, 3-9 parts of cellulose acetate butyrate, and 3-12 parts of triethanolamine. The concrete expansive agent is high in expansion rate and low in alkalinity, is capable of improving the property of concrete, preventing the concrete from cracking, meanwhile reducing leakage and improving strength, and is low in price, simple in production process, low in cost, and suitable for large-scale production.