63650results about "Process efficiency improvement" patented technology

Processes for extracting lithium from a clay mineral and compositions thereof are described. The extraction process includes providing a clay mineral comprising lithium, mixing a cation source with the clay mineral, performing a high-energy mill of the clay mineral, and performing a liquid leach to obtain a lithium rich leach solution.

The present invention belongs to the technical field of machining and punching, and in particular relates to a surface pressurized punching device for anode plate machining. The surface pressurized punching device comprises a workbench of a table structure, a machine unit mounted on one side of the workbench, and a rack welded to the table top of the workbench, wherein an operation platform is fastened to the table top of the workbench and inside the rack by means of bolts, and clamping plates which are oppositely arranged are slidably mounted on two sides of the surface of the operation platform; and a hydraulic cylinder is mounted at the center of the surface of the rack, and an output shaft of the hydraulic cylinder running into the rack is fixedly connected to a drill rod by means of a coupler. By means of providing a reaming assembly, an electric motor B is controlled by an external power supply to operate while the hydraulic cylinder drives the drill rod to move, such that the electric motor B drives, by means of a gear A and a chain, a gear B to rotate synchronously while the electric motor B moves with the drill rod by means of an outer frame, thereby driving the drill rod to rotate. Thus, the surface of the drill rod can rotationally grind and finish holes in an anode plate while the drill rod performs drilling, thereby reducing burrs.

The invention provides a green and environment-friendly steel wire rod for a 2300 MPa grade steel strand and a production method of the green and environment-friendly steel wire rod. The steel wire rod comprises, by weight, 0.95%-1.05% of C, 0.20%-0.40% of Si, 0.60%-0.90% of Mn, 0.10%-0.40% of Cr, smaller than or equal to 0.030% of V, smaller than or equal to 0.015% of P, smaller than or equal to 0.010% of S, 0.01%-0.04% of Al and the balance Fe. Through the special design of the components and through the processes of converter blowing, LF refining, RH refining, continuous casting, flaw detection and coping, high-speed wire rod rolling, online heat treatment and aging treatment, the strength of a steel strand finished product manufactured after an obtained wire rod is subjected to drawing, twisting and stabilizing treatment reaches 2300 MPa, and the tensile strength of the steel strand finished product reaches 2300 MPa. Meanwhile, the properties such as yield strength and elongation all meet the requirements, and the production method is efficient, green and energy-saving.

The invention belongs to the field of medical radioactive isotope preparation, and particularly relates to a method for extracting lead-212 and bismuth-212 from a thorium-232 decay chain, a solution containing a thorium-232 decay chain substance passes through an anion exchange resin column, the solution containing the thorium-232 decay chain substance contains halide ions, and the anion exchange resin column is used for extracting the lead-212 and the bismuth-212 from the thorium-232 decay chain substance. The concentration of hydrogen ions in the solution containing the thorium-232 decay chain substance is greater than 0.01 mol / L, the lead-212 and the bismuth-212 are adsorbed by the anion exchange resin column, other nuclides directly penetrate through the anion exchange resin column and are not adsorbed, a leaching reagent is introduced to desorb the lead-212 and the bismuth-212 from the anion exchange resin column, and the lead-212 and the bismuth-212 are separated and extracted; the method can be used for simultaneously extracting lead-212 and bismuth-212, has the advantages of high extraction speed and high purity, and is not easy to cause organic pollution to products.

The invention provides a gold mineral three-dimensional shape measuring method, and belongs to the technical field of process mineralogy. According to the method, a test sample is obtained through ore grinding, reselection, magnetic separation, flotation and nitric acid treatment, then an automatic mineralogical analysis sample is prepared through rolling, glue mixing, oscillation, curing, grinding and polishing and carbon spraying treatment in sequence, and then the three-dimensional morphological characteristics of gold minerals can be judged by combining automatic mineralogical analysis and specific calculation rules. And calculating a corresponding three-dimensional shape distribution rate. According to the method, special ore sample treatment steps are adopted, and enough gold minerals can be enriched; through the specific automatic mineralogical analysis sample preparation step, the probability of visible gold can be greatly improved; the three-dimensional form of the gold mineral can be obtained by adopting automatic mineralogy analysis and a specific calculation rule, manpower is saved, the testing efficiency is high, the influence of subjective factors of people is avoided, and data is more objective.

The invention provides a method for leaching copper-cobalt sulfide ore under efficient oxygen pressure, and relates to the technical field of metallurgy. The method for efficiently leaching the copper-cobalt sulfide ores under the oxygen pressure comprises the following steps: mixing materials including the copper-cobalt sulfide ores, sulfuric acid and water, slurrying, and then carrying out an oxygen pressure leaching reaction; and after the oxygen pressure leaching reaction is finished, solid-liquid separation is carried out, and leaching residues and leaching liquid are obtained. According to the method, the self-exothermic reaction of the excess sulfur element in the copper-cobalt sulfide ore is utilized, additional heating is not needed in the reaction process, then the oxygen pressure leaching reaction can be rapidly completed at a high temperature in a short time, and SO2 is not generated in the reaction process. The method for high-efficiency oxygen pressure leaching of the copper-cobalt sulfide ore has the advantages of being high in reaction speed, low in reaction energy consumption, easy to operate, environmentally friendly, easy to achieve industrial application and the like.

A magnetic separator for a magnetite powder production process, comprising a magnetic separation box (1). An opening is formed in a side wall of the magnetic separation box (1), and a door (2) is hingedly connected at the opening; the door (2) is provided with an observation window (3); a feeding channel (5) is obliquely arranged on the magnetic separation box (1); a feeding hopper (4) is fixed on the top of the feeding channel (5); a material distribution mechanism (6) is arranged inside the magnetic separation box (1); a primary magnetic separation drum (7) and a secondary magnetic separation drum (8) are rotatably mounted in the magnetic separation box (1); multiple partition strips (9) are evenly arranged on the side wall of the primary magnetic separation drum (7) along the circumferential direction; and a driving mechanism (10) is mounted on the side wall of the magnetic separation box (1) away from the door (2), and is used for driving the primary magnetic separation drum (7) and the secondary magnetic separation drum (8) to rotate synchronously.

The present invention belongs to the technical field of steelmaking. Disclosed are a high-purity high-carbon steel wire rod and a production method therefor. In addition to alloying elements and Fe, the high-purity high-carbon steel wire rod further comprises the following chemical components in percentage by mass: C: 0.5-1.0%, P≤0.008%, S≤0.0025%, T.O≤0.0010%, N≤0.0020%, H≤0.0002%, Alt≤0.0010%, and Ti≤0.0005%. The production method comprises: hot-metal pretreatment, converter smelting, RH vacuum treatment, continuous casting of large billets, cogging and grinding, high-speed wire rolling, Stelmor air cooling, and obtainment of a finished wire rod. In the present invention, highly homogenized casting blanks and high-quality wire rods are obtained, and high-purity base materials are provided for high-end wire rod products. Provided in the present invention are a high-purity high-carbon steel wire rod and a production method therefor, which can be used for producing highly homogenized wire rod products having high cleanliness.

The invention discloses a method for inhibiting leaching of beryllium in lithium smelting slag, and the method comprises the following steps: mixing a curing and stabilizing agent and the lithium smelting slag in a ball milling manner, and enabling the leaching concentration of beryllium in the treated lithium smelting slag to meet the national standard; the treatment method can be directly carried out on the basis of the existing lithium smelting process flow; the curing and stabilizing agent comprises a calcium-containing compound; the calcium-containing compound comprises at least one of calcium phosphate, calcium sulfate, calcium carbonate and calcium hydroxide. Based on a compound beryllium fixing principle of lattice substitution and adsorption, after the medicament is used for treating the beryllium-containing lithium smelting slag, beryllium in the treated lithium smelting slag can be stably cured. Besides, the curing and stabilizing agent can be common industrial solid waste, is wide in raw material source, simple to operate, remarkable in effect and easy to realize large-scale application, treats waste with waste and has important significance on harmless treatment and resource utilization of the high-toxicity lithium slag.

The invention discloses a 8.8-grade large-specification cold heading steel wire rod with excellent hardenability and a production method thereof, and belongs to the technical field of steel products. The steel wire rod is prepared from the following chemical components in percentage by mass: 0.35 percent to 0.39 percent of C, less than or equal to 0.10 percent of Si, 0.60 percent to 0.85 percent of Mn, 0.20 percent to 0.40 percent of Cr, 0.15 percent to 0.25 percent of Mo, 0.05 percent to 0.10 percent of Ni, 0.020 percent to 0.040 percent of Al, 0.0040 percent to 0.0080 percent of Ca, 0.0010 percent to 0.0030 percent of Ce, less than or equal to 0.0050 percent of N and the balance of Fe and inevitable impurities. The process route comprises the steps of molten iron pretreatment, converter smelting, LF refining, continuous casting, continuous rolling, billet cleaning, heating, rolling and controlled cooling. The produced # imgabs0 cold heading steel wire rod is good in cold heading performance, the hardness of the cross section of the wire rod is larger than 45 HRC after quenching, and the cold heading steel wire rod can be used for producing 8.8-grade high-strength bolts, nuts, screws and other hexagonal flange standard parts.

The invention discloses a preparation method of preheating-welding-free extra-thick steel S355MLO for ocean engineering, and belongs to the technical field of metal materials. The steel comprises the following chemical components in percentage by mass: 0.04%-0.06% of C, 0.15%-0.50% of Si, 1.35%-1.45% of Mn, less than or equal to 0.008% of P, less than or equal to 0.003% of S, 0.012%-0.02% of Ti, less than or equal to 0.015% of Al, 0.15%-0.25% of Ni, less than or equal to 0.18% of Cu, less than or equal to 0.18% of Cr, less than or equal to 0.35% of Ceq = [C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15] and the balance of Fe and inevitable impurities. The low-carbon and high-manganese component design is adopted, the S355MLO super-thick steel plate with the maximum thickness of 100 mm is produced through a continuous casting billet, the carbon equivalent Ceq is smaller than or equal to 0.35, and high strength, high toughness and high welding performance are integrated. The base metal and welding toughness of the thick steel plate produced by the TMCP process are improved through the component and inclusion regulation and control technology, the process is simple, the production cost is low, the production efficiency is high, preheating before welding can be avoided, and energy conservation and consumption reduction are achieved.

The invention discloses a production method of 420-grade preheating-free welding maritime work steel, and belongs to the technical field of metal materials. The steel comprises the following chemical components in percentage by mass: 0.04%-0.06% of C, 0.15%-0.50% of Si, 1.45%-1.55% of Mn, less than or equal to 0.008% of P, less than or equal to 0.003% of S, 0.012%-0.02% of Ti, less than or equal to 0.010% of Al, 0.15%-0.25% of Ni, 0.10%-0.18% of Cu, 0.10%-0.18% of Cr, less than or equal to 0.38% of Ceq = [C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15], and the balance of Fe and inevitable impurities. A low-carbon and high-manganese component design is adopted, the S420MLO super-thick steel plate with the maximum thickness capable of reaching 100 mm is produced through a continuous casting billet, the carbon equivalent Ceq is smaller than or equal to 0.38, and high strength, high toughness and high welding performance are integrated. The base metal and welding toughness of the thick steel plate produced by the TMCP process are improved through the component and inclusion regulation and control technology, the process is simple, the production cost is low, the production efficiency is high, preheating before welding can be avoided, energy is saved, consumption is reduced, and the method is environmentally friendly.

The invention provides lithium and aluminum hydroxyfluoride extraction equipment and a low-grade cathode carbon block recovery process, and relates to the technical field of metal recycling, the lithium and aluminum hydroxyfluoride extraction equipment comprises a bracket, a tank body, a mounting plate, a driving mechanism, a reciprocating mechanism, a water washing liquid discharging mechanism and an acid leaching liquid discharging mechanism; the tank body is installed in the support, a top plate is installed at the top end of the tank body through bolts, and a supporting frame is installed on the upper surface of the top plate through bolts. According to the scheme, a layer of pickle liquor is covered and injected after water washing liquid enters, so that the two extracting solutions can be added in a laminated manner, and the water washing liquid and the pickle liquor are quantitatively added in the laminated adding process, so that layered mixing is realized in the adding process of the device, and the efficiency of the device is improved. According to the device, the subsequent stirring time can be shortened, electric power is saved, meanwhile, it is guaranteed that two kinds of liquid are mixed more sufficiently and stably, and meanwhile the internal alkaline balance can be guaranteed through a stacked adding mode.

The invention relates to the technical field of processing and utilization of microorganisms and mineral resources, in particular to a rare earth extracting agent and application thereof. The rare earth extracting agent provided by the invention comprises silicon-decomposing microorganisms, acid-producing microorganisms or fermentation products thereof which are screened from rare earth mines and rare earth wastes and have good symbiotic effect, high compatibility and high activity, so that the silicon-decomposing and acid-producing efficiency is further improved, and the rare earth element extracting efficiency is high. The rare earth leaching agent provided by the invention is simple and safe in component, and solves the problems of large chemical reagent dosage, high production cost, serious environmental pollution and the like in the rare earth waste chemical leaching process. The method is suitable for popularization.

The invention provides a method for preparing low-chromium low-potassium vanadium oxide by using a sodium vanadium solution, which comprises the following steps: S1) adjusting the pH value of the sodium vanadium solution to 10.5-11.0, and reacting with a chromium removal agent to obtain initial chromium removal slurry; s2) adjusting the pH value of the initial chromium removal slurry to 9.0-9.5, reacting with a silicon removal agent, and carrying out solid-liquid separation to obtain a filtrate; s3) reacting the filtrate with hydrogen peroxide, adding ammonium salt, precipitating vanadium, and performing solid-liquid separation to obtain ammonium metavanadate and primary vanadium precipitation wastewater; s4) adjusting the pH value of the primary vanadium precipitation wastewater to 6-7, reacting with ferrous sulfate, adding a complexing agent, mixing with the sodium vanadium solution, precipitating, and performing solid-liquid separation to obtain ammonium polyvanadate; and oxidizing and calcining the ammonium metavanadate to obtain the low-chromium low-potassium vanadium oxide. According to the method provided by the invention, the low-chromium and low-potassium vanadium oxide is prepared from the sodium vanadium solution, meanwhile, ammonium salt and vanadium in the primary vanadium precipitation wastewater are recycled, and the comprehensive production cost of the vanadium oxide is reduced.

The invention discloses a method for recycling lithium in a lithium battery, and belongs to the field of lithium battery recycling. The method comprises the following steps: decomposing the lithium battery, and performing pyrolysis treatment at 200-500 DEG C to obtain a slag material; the slag charge is placed in a composite leaching agent, the pH is adjusted to 1.5-2.5, lithium in the slag charge is leached out, and a leaching solution is obtained; the composite leaching agent comprises oxalic acid, an amino acid ligand, persulfate and fluorine ions; adjusting the pH value of the leaching solution to 5.5-6.2, adding an extracting agent into the leaching solution, extracting lithium ions in the leaching solution, and separating to obtain a lithium-rich organic phase and lithium-containing waste liquid; the extraction agent comprises crown ether and organophosphate; and the lithium-rich organic phase is subjected to back extraction, so that lithium ions are released from the organic phase, a lithium-rich back extraction solution is obtained, a carbonate solution is added into the lithium-rich back extraction solution, and lithium carbonate precipitates are obtained. According to the method for recycling the lithium in the lithium battery, selective leaching of the lithium can be achieved, and the comprehensive yield of the lithium in the lithium battery is increased.

The invention discloses a method for activating and precipitating MHP through magnesium, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: S1, mixing a magnesium-containing solution with a sodium hydroxide solution, and carrying out precipitation reaction for 3-5 minutes to obtain a precipitator; s2, immediately mixing a precipitator with the laterite-nickel ore iron and aluminum removed liquid, and then carrying out first-stage nickel and cobalt precipitation reaction to obtain first-stage nickel and cobalt precipitation slurry; s3, performing first thickening treatment on the first-section nickel and cobalt deposited slurry to obtain first dense underflow and first dense overflow; and S4, filtering the first dense underflow to obtain an MHP product. According to the method, after the magnesium-containing solution and the sodium hydroxide solution are mixed, the magnesium solution and the sodium hydroxide solution are controlled to be mixed and react for 3-5 min, then the nickel and cobalt precipitation reaction is immediately carried out, the MHP product with high purity and quality can be obtained, and the whole method is simple and convenient for large-scale industrial application.

The invention discloses a method for extracting lithium from a salt lake and an extraction device. The method for extracting lithium from the salt lake provided by the invention comprises the following steps: salt lake brine is subjected to aluminum adsorbent adsorption, ultrafiltration impurity removal, multi-stage nanofiltration magnesium and boron removal, reverse osmosis concentration, ultrafiltration softening deep magnesium removal, resin magnesium and boron removal, MVR evaporation and other technological processes, and a battery-grade lithium carbonate product is obtained. According to the method, the membrane separation technology serves as a core, resin and an evaporation system serve as auxiliary materials, deep separation of magnesium and lithium in the salt lake brine is achieved, the boron removal rate and the lithium recovery rate are high, meanwhile, recycling of water resources is guaranteed, and the whole process has the advantages of being controllable, high in automation degree, low in production cost, small in pollution, high in water recovery rate and suitable for industrial production. The method can be applied to large-scale production of salt lake lithium extraction.

The GPa-grade ultrahigh-strength anti-fatigue steel comprises the following chemical components in percentage by weight: 0.02 to 0.07 percent of C, 0.10 to 0.25 percent of Si, 1.75 to 2.50 percent of Mn, 0.022 to 0.026 percent of P, less than or equal to 0.008 percent of S, 0.03 to 0.04 percent of Nb, 0.09 to 0.15 percent of V, 0.045 to 0.055 percent of Ti, 0.50 to 0.80 percent of Mo, 2.00 to 2.40 percent of Cr, 8.0 to 10.0 percent of Ni, 8.0 to 12.0 percent of Co, 0.035 to 0.045 percent of Als, 0.013 to 0.014 percent of N, 0.58 to 0.62 percent of Cu, 0.03 to 0.05 percent of Sb, 0.03 to 0.05 percent of RE and 0.0008 to 0.001 percent of B. The method comprises the steps of smelting, continuous casting, rapid cooling, casting blank heating, rolling and heat treatment. The maximum thickness of the steel plate is 100mm, Rp0.2 is 1080-1120MPa, A is greater than or equal to 18%, and the fatigue life gt under the peak stress of 560MPa; the impact energy at-60 DEG C is greater than or equal to 150J, and the marine atmosphere corrosion resisting rate is 1t; and 0.10 mm / a. The strength of the steel is improved, the impact toughness of the steel plate at low temperature is improved, and the corrosion resistance and the fatigue resistance of the steel are improved.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2100MPa-grade stranded wire and a manufacturing method of the high-strength complex-phase hot-rolled wire rod, after a C-Si-Mn-Cr-Mo high-carbon component system is rolled and spun into a wire rod, the wire rod is subjected to online molten salt strong quenching isothermal treatment, so that the wire rod is firstly subjected to front-section molten salt treatment and is cooled at a cooling speed of greater than or equal to 33 DEG C / s, and enters a bainite phase region from an austenite state; the method comprises the following steps: firstly, carrying out first-stage molten salt treatment to promote transformation of austenite into bainite, then carrying out later-stage molten salt treatment to form a structure mainly comprising bainite, carrying out isothermal tempering on the structure, reserving part of untransformed retained austenite, and finally, carrying out roller way slow cooling to promote transformation of the untransformed retained austenite into martensite, and carrying out tempering, the microstructure of the hot-rolled wire rod comprises a complex-phase structure composed of tempered bainite and tempered martensite, the tensile strength of the hot-rolled wire rod can reach 1435-1485 MPa, the percentage reduction of area of the hot-rolled wire rod is 31%-36%, off-line heat treatment of follow-up machining is avoided, and the risk of wire breakage is reduced.

The invention relates to the technical field of crushing devices, and particularly discloses a magnesium chip crushing device which comprises a base, a ball-milling barrel is rotatably mounted on the base, an air blowing pipe is mounted in the ball-milling barrel in the axial direction of the ball-milling barrel and can rotate around the axis of the ball-milling barrel, and air blowing holes are formed in the air blowing pipe and can convey cooling gas into the ball-milling barrel. A support is fixedly installed on the air blowing pipe, a separating plate and a collecting cover are fixedly installed on the support, the support is communicated with the outside of the ball milling cylinder, and the air blowing pipe has two relative movement positions. The device has the beneficial effects that the separating plate can separate generated micro-powder from materials, the micro-powder is driven by cooling gas to enter the collecting cover and then is discharged, meanwhile, in the falling process of the materials, convection can be formed between the materials and the rising cooling gas, heat in the materials is taken away, the micro-powder generated in the working process can be discharged, meanwhile, the materials can be cooled, and the working efficiency is improved. And the explosion risk is effectively reduced.

The invention discloses a method for manufacturing 7072 alloy high-performance air conditioner foil in a low-carbon, efficient and short-process mode, and relates to the technical field of aluminum foil machining. S2, continuous casting and rolling; s3, cold foil rolling; s4, finished product annealing; and S5, checking and packaging. Through component adjustment, iron and silicon alloy elements are controlled at the lower limit of the national standard, generation of coarse aluminum-iron-silicon phases is reduced, and low ductility caused by coarse grains after finished product annealing is avoided; in the cold foil rolling process, indexes of a working roll and rolling oil are adjusted, process parameters are optimized, the blank is directly rolled into a finished product, the direct rolling process is beneficial to improving the mechanical property of the finished product, and punching production of downstream customers is facilitated; and after triple continuous rolling is finished, subsequent cold foil rolling continuous rolling is rapidly arranged, deformation heat generated by triple continuous rolling and rolling of each pass is fully utilized, and large-machining-rate rolling of each pass is achieved.

The invention discloses 460-grade preheating-free welding maritime work steel and a preparation method thereof, and belongs to the technical field of metal materials. The steel comprises the following chemical components in percentage by mass: 0.04 to 0.06 percent of C, 0.15 to 0.50 percent of Si, 1.75 to 1.85 percent of Mn, less than or equal to 0.008 percent of P, less than or equal to 0.003 percent of S, 0.012 to 0.02 percent of Ti, less than or equal to 0.015 percent of Al, 0.25 to 0.35 percent of Ni, 0.20 to 0.28 percent of Cu, 0.20 to 0.25 percent of Cr and the balance of Fe and inevitable impurities. A low-carbon and high-manganese component design is adopted, the S460MLO super-thick steel plate with the maximum thickness capable of reaching 100 mm is produced through a continuous casting billet, the carbon equivalent Ceq is smaller than or equal to 0.45, and high strength, high toughness and high welding performance are integrated. The base metal and welding toughness of the thick steel plate produced by the TMCP process are improved through the component and inclusion regulation and control technology, the process is simple, the production cost is low, the production efficiency is high, preheating before welding can be avoided, energy is saved, consumption is reduced, and the method is environmentally friendly.

The invention relates to an annealing-free alloy cold heading steel wire rod for a 12.9-grade bolt and a production method of the annealing-free alloy cold heading steel wire rod. The production process comprises the steps of molten iron pre-removal of P / S, electric furnace or converter smelting, external refining, bloom continuous casting, rolling into an intermediate billet and steel billet finishing, intermediate billet heating, high-pressure water descaling, rough rolling, intermediate rolling, pre-finish rolling, finish rolling, spinning, coil collecting and cooling. The annealing-free alloy cold forging steel wire for the 12.9-grade bolt comprises the following components in percentage by mass: 0.30%-0.35% of C, 0.10%-0.30% of Si, 0.70%-1.20% of Mn, 1.0%-1.5% of Cr, 0.15%-0.30% of Mo, 0.015%-0.030% of Al, 0.0030%-0.0080% of N, 0.01%-0.04% of Nb, less than or equal to 0.30% of Ni, less than or equal to 0.10% of Cu, less than or equal to 0.015% of P, less than or equal to 0.010% of S, less than or equal to 0.012% of (As + Sb + Bi), less than or equal to 0.0010% of O and the balance of Fe and inevitable impurity elements, the niobium-nitrogen product (Nb * N) is greater than On the premise that main alloy components are not reduced, a fine grain structure can be obtained under a certain condition by adding grain refining elements, and the delayed phase change effect the same as that of a low-temperature finish rolling process is achieved by utilizing the delayed phase change characteristic of the fine grain structure.

The invention discloses a method for removing lead and supplementing nickel from electrodeposited nickel anolyte, which relates to the technical field of nickel wet smelting, is used for purifying and removing lead from anolyte of a pure sulfuric acid system, and comprises the following steps of: adding the electrodeposited anolyte into refined nickel sulfate oil-removed liquid and nickel carbonate slurrying liquid, introducing air, controlling the temperature, and entering an acid dissolution lead removal tank for acid dissolution; and filtering the acid-dissolved solution through an acid dissolution filter press, pumping the obtained primary filtrate into a precision filter, pumping the obtained secondary filtrate into a secondary filtrate storage tank, pumping the secondary filtrate into a catholyte tank through a secondary filtrate delivery pump, and enabling the obtained catholyte as an electrodeposition cell catholyte to enter an electrodeposition process. The method has the advantages of being short in technological process, high in lead removal efficiency, simple and convenient to use, easy to filter, low in energy consumption, capable of recycling the falling solution, convenient for industrial production and the like.

The invention relates to 390mm * 510mm section bloom B3 grinding ball steel and a preparation method thereof, and the preparation method comprises the following steps: loading a certain amount of molten iron and scrap steel for primary smelting in a converter, and sequentially adding an aluminum ingot, an alloy, pre-melting type calcium aluminate and refined lime when 1 / 4 of the steel is tapped; carrying out LF refining on the tapping molten steel subjected to primary smelting in the converter to obtain refined molten steel; the refined molten steel is subjected to RH vacuum refining, and RH vacuum refined molten steel is obtained through superheat degree control, RH working vacuum degree control, retention time control and soft blowing time control; and continuous casting is conducted, specifically, the RH vacuum refined molten steel is subjected to set pulling speed, crystallizer and tail end electromagnetic stirring and soft reduction treatment according to the pouring section, and the bloom B3 grinding ball steel with the section being 390 mm * 510 mm is obtained. According to the method, the converter primary smelting, the LF refining, the RH vacuum refining and the molten steel whole-process protection pouring smelting process are controlled, the cleanliness of the molten steel is guaranteed, and generation of large-particle inclusions is avoided; and process parameters are reasonably set in the continuous casting process, so that the internal quality of the bloom is obviously improved, and the production efficiency is greatly improved.

The invention discloses thin-gauge non-oriented silicon steel and a production method thereof, and a motor iron core and a manufacturing method thereof. The production method comprises the following steps: heating a steel billet to 1080-1120 DEG C, preserving heat for 150-200 minutes, performing rough rolling to obtain an intermediate billet of 35-45 mm, performing finish rolling, and coiling to obtain a hot-rolled coiled plate of 2.30-3.00 mm; the initial rolling temperature of finish rolling is 970 + / -20 DEG C, the final rolling temperature is 850 + / -20 DEG C, the reduction rate is 92% or above, and the coiling temperature is 700 + / -20 DEG C; acid pickling and cold rolling are carried out under the condition that normalizing is not carried out, and cold-rolled strip steel with the thickness ranging from 0.15 mm to 0.35 mm is obtained; the total reduction rate of cold rolling is greater than or equal to 86%; performing primary annealing, cooling and coating to obtain a steel plate finished product; the annealing temperature is 830-870 DEG C, and the temperature is kept for 60-90 seconds. Therefore, the same piece of non-oriented silicon steel can meet the requirements of the stator and rotor iron cores at the same time, the manufacturing cost of the stator and rotor iron cores is low, and material waste is avoided.

The invention relates to a microwave magnetizing roasting-gradient magnetic separation iron removal method and purification process for quartz ore. Firstly, impurity minerals / inclusions in ores are magnetically modified through microwave magnetizing roasting, weak magnetic minerals in quartz minerals are converted into strong magnetic minerals through a gaseous reducing agent, introduction of solid impurities is avoided, meanwhile, the Fe-containing gas-liquid inclusions are subjected to heating decomposition and magnetic conversion at the specific temperature, and the Fe-containing gas-liquid inclusions are subjected to magnetic modification; and removing magnetic minerals through a gradient magnetic separation process of permanent magnet-high-strength superconducting magnetic separation to obtain the low-iron quartz sand. Due to the characteristic of selective microwave heating, gas / solid inclusions are more easily broken and exposed outside, the efficiency of impurity removal and purification in the subsequent process is effectively improved, and high-purity quartz sand with Fe less than or equal to 0.05 ppm and SiO2 more than or equal to 99.998% can be obtained by matching with purification processes such as acid leaching, flotation and chloridizing roasting. According to the method, ferromagnetic and weakly magnetic impurities, inclusions and the like in the quartz sand can be removed in a targeted mode, the iron removal effect is extremely good, the process is simple and efficient, and the method is more environmentally friendly.

The invention discloses a method for synchronously improving the recovery rate of copper and cobalt in high-oxidation-rate copper-cobalt ore and low-grade copper oxide-cobalt concentrate, which comprises the following steps: (1) carrying out copper sulfide flotation on the high-oxidation-rate copper-cobalt ore to obtain high-copper tailings; (2) the low-grade copper-cobalt concentrate and the high-copper tailings are mixed according to the mass ratio of 1: (1-2), and mixed ore is obtained; (3) the obtained mixed ore and a sulfuric acid solution system leaching agent are stirred and mixed, and slurry is obtained; (4) leaching the obtained slurry at normal temperature, and carrying out solid-liquid separation to obtain leached residues and leached liquid; (5) carrying out washing, extraction, reverse extraction and electrodeposition on the obtained leaching residues to obtain metal copper; and removing iron from the raffinate, and adding magnesium oxide into the iron-removed liquid for precipitation to obtain crude cobalt hydroxide. According to the method, the high-copper tailings and the low-grade copper oxide cobalt concentrate are subjected to the processes of ore blending, size mixing, normal-temperature sulfuric acid leaching and the like, the final copper leaching rate is 95% or above, and the cobalt leaching rate is 70% or above.

Disclosed are a flux-cored welding strip and a welding flux used in combination for submerged arc welding of a duplex stainless steel, and preparation methods and use thereof. The flux-cored welding strip is composed of a stainless steel shell and a flux core powder, the flux core powder consisting of the following components: in percentages by mass, ferrochrome nitride: 0.70% to 1.0%, a chromium powder: 26% to 27%, a nickel powder: 4.5% to 5.5%, a molybdenum powder: 3.7% to 4.2%, a manganese powder: 2.55% to 2.65%, a copper powder: 1.45% to 1.55%, a ferrosilicon powder: 1.1% to 1.2%, a tungsten powder: 1.0% to 1.15%, a niobium powder: 0.25% to 0.35%, an aluminum powder: 0.35% to 0.55%, a rhenium powder: 0.35% to 0.40%, a lanthanum powder: 0.1% to 0.15%, and a balance being an iron powder.