156 results about "Acid washing" patented technology

The invention discloses a weather-resistant heat-insulation waterproof coating for an outer wall and a preparation method of the weather-resistant heat-insulation waterproof coating. The waterproof coating comprises the following components in parts by weight: 27-35 parts of modified acrylate polymer emulsion, 35-50 parts of composite filler, 5-10 parts of a curing system, 4-8 parts of a coalescing agent, 0.1-0.5 part of a defoaming agent, 0.3-0.8 part of a flatting agent, 0.2-0.6 part of a mildew preventive, 0.5-1.0 part of a thickening agent and 1-5 parts of a pH regulator, the modified acrylate polymer emulsion is prepared by carrying out pretreatment and silanization modification on cardanol and then carrying out monomer pre-emulsification and free radical polymerization. According to the waterproof coating provided by the invention, a Si-O-C network and a hindered amine free radical capture system are introduced, so that the weather resistance is improved; fluoride-nano silicon dioxide is used for constructing a roughness-low surface energy synergistic waterproof interface; acid-washed fly ash floating beads, silicon dioxide aerogel and expanded perlite filler are compounded to form multiple heat conduction scattering paths so as to realize cross-scale porous filler heat preservation; the waterproof coating can serve in complex environments with large temperature difference fluctuation, acid rain and the like.

The invention discloses an automotive interior metal part spraying process based on a high-adhesion water-based paint, which comprises the following steps: firstly, carrying out alkali washing and acid washing treatment on a metal part, so that the metal surface is clean and micro roughness is formed; then carrying out chemical conversion treatment by adopting a water-based conversion solution containing amino silane and epoxy silane to form a compact and uniform conversion film on the metal surface; then water-based prime coat is sprayed on the surface of the conversion film, the thickness of a dry film is controlled to be 3-8 microns, and good substrate binding force is provided after heating; the preparation method comprises the following steps: firstly, spraying a water-based finishing coat taking hydroxy acrylic resin as a main body, adding a blocked isocyanate cross-linking agent, uniformly coating through an electrostatic spraying process, and finally curing under a sectional heating condition to obtain a coating with excellent durability; according to the present invention, the adhesion between the water-based paint and the metal base material is effectively improved, the durability of the paint film in the damp and hot salt mist environment is improved, the use of the organic solvent is reduced, and the advantages of environmental protection, low VOC emission and suitableness for industrial large-scale production are provided.

The application provides a quartz sand acid washing waste liquid resource treatment method, and belongs to the field of industrial waste water treatment, and comprises the following steps: adding magnetic composite seeds to the quartz sand acid washing waste liquid, and performing magnetic separation after stirring treatment; adding soluble potassium salt to the treated waste liquid to recover potassium fluosilicate; treating the filtrate through diffusion dialysis to obtain recovered acid and dialysis residual liquid; the diffusion dialysis treatment adopts an asymmetric membrane, the asymmetric membrane has a physical gradient of one side being a dense structure and the other side being a loose structure, and the dense structure side is in contact with the waste liquid; and adding calcium oxide or calcium hydroxide to the dialysis residual liquid for deep treatment and calcium recovery. The application provides a quartz sand acid washing waste liquid resource treatment method which is low in treatment cost, high in resource recovery rate and friendly to the environment, and realizes the differentiated resource recovery of the quartz sand acid washing waste liquid.

The invention belongs to the technical field of talc, and provides a method for detecting fluorescent substances in talc raw ore, which comprises the following steps: S1, carrying out ball milling on the talc raw ore in a ball mill, sieving to obtain sieved powder, and adding deionized water into the sieved powder to obtain slurry; s2, adding the slurry into the mixture to enable the pH value of the slurry to be 5, stirring, and standing in a water bath for 2-3 hours to obtain a first precipitate; s3, adding a thiourea-ascorbic acid solution into the first precipitate to obtain a second precipitate; and S4, carrying out secondary ball milling on the second precipitate, and spreading the second precipitate in an enamel plate to detect whether the talc raw ore contains the fluorescent substances or not. The hydrochloric acid can dissolve quartz and mica to avoid generation of background fluorescence or quenching effect, and the nonionic surfactant polyethylene glycol can be adsorbed on the surface of the mineral to reduce interfacial tension, so that the hydrochloric acid is easier to infiltrate tiny pores, the pit defect caused by local over-corrosion is reduced, the pickling uniformity is improved, and the detection sensitivity is improved.

This invention relates to the field of quartz sand purification technology and discloses an energy-saving and environmentally friendly quartz acid washing and purification device, comprising: an acid washing tower, an annular nozzle assembly, multiple directional ultrasonic transducers, and a solid-liquid separation component. An acid washing space is formed within the acid washing tower; a feed channel is provided at the top of the acid washing tower, connecting the external environment and the acid washing space; the annular nozzle assembly includes a liquid delivery ring and multiple nozzles; the liquid delivery ring is located in the acid washing tower and extends circumferentially along the tower; directional ultrasonic transducers are installed on the liquid delivery ring, with their ultrasonic radiation direction facing the axis of the acid washing tower; the multiple nozzles and multiple directional ultrasonic transducers are distributed at intervals along the circumference of the liquid delivery ring; the solid-liquid separation component includes a conveying mechanism, a collection tank, and a storage tank; the conveying mechanism is connected to the bottom of the acid washing tower via a discharge pipe; the storage tank is connected to the conveying end of the conveying mechanism. This achieves continuous acid washing.

The application discloses a waterproof coating for outer wall weather resistance, heat insulation and heat preservation and a preparation method thereof. The waterproof coating comprises the following components in parts by weight: modified acrylate polymer emulsion 27-35 parts, composite filler 35-50 parts, curing system 5-10 parts, film forming aid 4-8 parts, defoaming agent 0.1-0.5 parts, leveling agent 0.3-0.8 parts, mildew-proof agent 0.2-0.6 parts, thickening agent 0.5-1.0 parts and pH regulator 1-5 parts. The modified acrylate polymer emulsion is prepared by pretreating and silanization modifying cardanol, monomer pre-emulsification and free radical polymerization. The waterproof coating provided by the application introduces Si-O-C network and hindered amine free radical capture system to improve weather resistance; fluorine compound-nano silicon dioxide constructs roughness-low surface energy synergistic waterproof interface; acid washing fly ash floating beads, silica aerogel and expanded perlite filler are compounded to form multiple heat conduction scattering paths to realize cross-scale porous filler heat preservation; and the waterproof coating can serve in complex environments such as large temperature difference fluctuation and acid rain.

The invention provides a modified porous carbon composite material and a preparation method thereof, and belongs to the field of carbon materials. The method comprises the following steps: adding water-soluble resin and a foaming agent into a zinc chloride aqueous solution, and then carrying out spray drying to obtain a precursor material; dispersing the precursor material in an organic acid solution, adding a silane coupling agent, and then performing spray drying to obtain an intermediate material; carrying out pre-carbonization treatment on the intermediate material to obtain a pre-carbonized material; activating the pre-carbonized material in a carbon dioxide atmosphere to obtain an activated material; pickling the activated material to obtain a pickled material; the acid pickling material is subjected to reduction treatment, and a reduction material is obtained; and crushing the reduction material to obtain the modified porous carbon composite material. According to the novel porous carbon preparation method, high pore volume, proper pore diameter, low expansion, high first efficiency and low cost can be synergistically considered, so that the application requirements of a high-performance porous carbon negative electrode material are met.

The application discloses a sidetracking horizontal well large-diameter open-hole filling and acid washing integrated pipe column and a running method thereof. The pipe column comprises an outer pipe column and an inner pipe column, the inner pipe column is arranged in the outer pipe column, and a casing is arranged outside the outer pipe column. The outer pipe column comprises, from top to bottom, a locking device, an outer channel, a releasing device, a fishing device, a slip, a rubber sleeve, a reverse washing device, a filling outer tool, a backflow prevention device, an open-hole screen pipe and an acid washing outer sealing device. The inner pipe column comprises, from top to bottom, an inner channel, a filling inner tool, a check valve, a jetting pipe, an acid washing inner sealing device, a jet tool, a ball catching device and a bottom liquid flow port. The running method comprises the following steps: drilling fluid injection, pipe releasing, normal mud replacement, tubing pressure test, opening of the locking device, filling, reverse well washing without moving the pipe column, normal rotation releasing, segmented acid washing construction, reverse well washing until the outlet is clean and pipe column lifting. The application has the advantages of short construction period, effective prevention of well wall collapse, short construction period, high safety, and good construction effect.

The invention discloses an electric power oil washing device and an electric power oil purification treatment system and method. The electric power oil washing device comprises a washing oil tank, a circulating spraying unit, a waste liquid discharging unit and a first oil liquid discharging unit. The washing oil tank is used for inputting and accommodating oil and water for electric power to be treated; the first end of the circulating spraying unit is connected with the side part and / or the bottom of the washing oil tank, the second end of the circulating spraying unit is connected with the top of the washing oil tank, and the circulating spraying unit is used for conveying a mixed solution of to-be-treated electric oil and water to the top of the washing oil tank and spraying downwards; the waste liquid discharging unit is arranged at the bottom of the washing oil tank; and the first oil liquid discharging unit is arranged at the bottom of the washing oil tank. According to the invention, the distribution and precipitation characteristics of chlorine, pickling substances and oil sludge and the characteristic that additives in oil are insoluble in water are utilized, water is used for dissolution, the problem that chlorine cannot be effectively removed is solved, most acidic substances and part of oil sludge are removed by means of water, the cost is reduced, and the problem of secondary pollution in the treatment process is avoided.

The invention relates to the technical field of hand mold cleaning, in particular to a ceramic hand mold cleaning device which comprises a water washing pool and further comprises an alkali washing pool, a ceramic hand mold cleaning device and a ceramic hand mold cleaning device. The pickling tank is mounted at one end, opposite to the water washing tank, of the alkaline washing tank, and the ceramic hand mold enters the pickling tank after being subjected to alkaline washing by the alkaline washing tank; the three circulating driving components are respectively mounted in the water washing tank, the alkali washing tank and the acid washing tank and are used for driving liquid in the water washing tank, the alkali washing tank and the acid washing tank to circularly flow; the two showering assemblies are mounted between the alkali washing pool and the pickling pool and at one end, back to the alkali washing pool, of the pickling pool, and are used for synchronously moving the ceramic hand mold, washing the ceramic hand mold around the ceramic hand mold and washing residual liquid on the surface of the ceramic hand mold subjected to pickling or alkali washing; the whole process of the device effectively avoids dilution or neutralization caused by the fact that acid and alkali liquid is brought into the next pool, the service life of cleaning liquid is prolonged, the replacement cost is reduced, and an efficient, stable and economical cleaning scheme is achieved.

This invention relates to a method for preparing a self-purifying stepped ring packing, belonging to the field of water pollution purification materials. The method comprises the following steps: after acid washing and activation of ceramic stepped rings, a neodymium-niobium-zinc precursor is sprayed onto the surface of the ceramic stepped rings using a thermal spraying method. A series of drying and calcination processes are then performed to coat the surface of the ceramic stepped rings with a neodymium-niobium-zinc composite oxide active coating. The coating accounts for 3.6% to 3.9% of the total mass of the self-purifying stepped ring packing and exhibits high activity in decomposing organic pollutants. This packing can stably remove organic pollutants from wastewater over a long period, requiring minimal maintenance and regeneration during use, and has broad application prospects in practical wastewater treatment.

A high-strength Portland cement slurry for ultra-high-temperature cementing, a preparation method therefor and an application thereof. In parts by weight, the composition of the cement slurry comprises: 100 parts of Portland cement, 4-6 parts of a high temperature anti-cracking material, 80-105 parts of a high-temperature reinforcing material, 70-78 parts of water, 0.5-1.5 parts of a dispersant, 1-3 parts of a fluid loss reducer, 0.5-2.5 parts of a retarder and 0.2-0.5 parts of a defoamer; the high-temperature reinforcing material is a combination of acid-washed quartz sand, metakaolin and aluminum sulfate, a combination of acid-washed quartz sand, metakaolin, feldspar and sodium sulfate, or a combination of acid-washed quartz sand, metakaolin, feldspar and calcium nitrite. The cement slurry has good settling stability, rapid strength development in low temperatures, high compressive strength of cement stone at a high temperature of 600° C., and stable development of long-term high-temperature compressive strength.

The invention relates to a Bi2O3 / Bi-Nx co-doped carbon-based composite coating material as well as a preparation method and application thereof, the composite coating material is prepared by taking SiO2 nanospheres as a hard template and polyquaternium-7 as a nitrogen source, forming a three-dimensional carbon skeleton structure with hierarchical pores after alkali etching, and then performing acid pickling and secondary carbonization processes. According to the preparation method, a composite active center system of the atomic-scale dispersed bismuth and the Bi2O3 phase is successfully constructed, the zinc deposition behavior is optimized by precisely regulating and controlling the synergistic effect mechanism of the atomic-scale dispersed bismuth and the Bi2O3 phase, and the zinc anode coating with high zinc affinity and long cycle stability is prepared.

The application belongs to the technical field of building materials, and particularly relates to a filling cementing material based on titanium gypsum and fly ash and application thereof, and comprises the following raw materials in parts by weight: fluorine-stabilized titanium gypsum 30-40 parts, modified slag powder 15-25 parts, fly ash 25-35 parts, sulphoaluminate cement 5-10 parts, quicklime 2-5 parts, silica fume 0.5-1.5 parts, water glass 1.5-3 parts, water reducing agent 0.3-0.6 parts, and retarder 0.05-0.15 parts; the fluorine-stabilized titanium gypsum is prepared by acid washing activation, iron-aluminum complexation and calcium salt precipitation fluorine fixation, and the modified slag powder is prepared by mechanical activation, fluidized bed step-by-step coating and silane modification. The application solves the fluorine damage problem of titanium gypsum through modification of core raw materials and synergy of multiple components, optimizes the fluidity and stability of the cementing material, improves the mechanical strength at each age, and is suitable for filling construction in building engineering, and has the advantages of environmental protection and economic value.

The invention belongs to the technical field of new energy materials, and particularly relates to a composite hard carbon material based on red mud and lignin as well as a preparation method and application of the composite hard carbon material. The preparation method comprises the following steps: respectively pretreating red mud and lignin, then preparing a red mud and lignin composite precursor, and then carrying out carbonization treatment and acid pickling post-treatment to obtain the composite hard carbon material. According to the method, the red mud and the lignin are compounded to prepare the hard carbon for the first time, the utilization rate of the red mud and the lignin is remarkably increased through cooperative regulation and control of a metal oxide template effect and a biomass carbon source, and the production cost of the hard carbon is reduced; the graded porous structure improves the ion transmission rate and the electrochemical performance; metal salt can be recycled from pickling waste liquid, and no toxic by-product is generated in the whole process.

The present application belongs to the technical field of environmental protection, and particularly relates to a high-concentration odor combined treatment device and method for kitchen waste. The odor pretreatment unit of the treatment device comprises an alkali washing tower and an acid washing tower, and the outlet of the alkali washing tower is connected to the inlet of the acid washing tower. The odor biological treatment unit is a combined biological filter tank, which comprises a biological trickling filter section, a pre-washing section and a biological filter section connected in series, and the inlet of the biological trickling filter section is connected to the outlet of the acid washing tower. The odor deep treatment unit comprises a double-mediator barrier low-temperature plasma equipment, a delay oxidation tower and a spraying tower connected in series, and the inlet of the double-mediator barrier low-temperature plasma equipment is connected to the outlet of the biological filter section. The double-mediator barrier low-temperature plasma equipment is used for removing residual refractory odor substances in the gas. The delay oxidation tower is used for prolonging the gas residence time, and the spraying tower is used for the final purification of the gas. The present application can efficiently and accurately remove odor-causing substances, and the treated gas can meet the environmental protection requirements.

The invention relates to the technical field of carbon tritium sampling, and discloses a carbon-14 multifunctional sampling device and a use method thereof.The multifunctional sampling device comprises a first sampling bottle, a second sampling bottle, a third sampling bottle, a fourth sampling bottle, a flowmeter, a high-temperature catalytic furnace, an air pump, a first three-way valve, a first four-way valve, a second four-way valve, a second three-way valve and an acid pickling mechanism; the pickling mechanism comprises a pickling solution storage container, a liquid pump and a pickling reserved pipe; the first three-way valve, the first four-way valve, the second four-way valve, the second three-way valve and the pickling mechanism are additionally arranged on an original pipeline, blockage of a sampling loop is removed through pickling, equipment faults are avoided, the normal operation state and the pickling state of equipment can be rapidly switched, preparation work before pickling is simplified, and the production efficiency is improved. And the first three-way valve has the function of preventing suck-back to protect the flowmeter, the second four-way valve has the function of preventing suck-back to protect the high-temperature catalytic furnace, and the problems of equipment damage faults and the like are effectively prevented.

This utility model relates to the technical field of sand and gravel washing equipment, specifically to a washing device for cleaning quartz sand, comprising: a scrubbing machine for scrubbing quartz sand and having a discharge port for discharging quartz sand from the scrubbing machine after scrubbing; an acid washing tank for holding an acidic solution; and a slope dewatering mechanism disposed between the scrubbing machine and the acid washing tank, inclined from the scrubbing machine towards the acid washing tank, capable of receiving the quartz sand output from the scrubbing machine; wherein the quartz sand output from the scrubbing machine falls onto the upper end of the slope dewatering mechanism and rolls down into the acid washing tank via the slope dewatering mechanism. This utility model, by providing a slope dewatering mechanism between the scrubbing machine and the acid washing tank, can remove most of the water adhering to the quartz sand before it is put into the acid washing tank, thereby preventing a rapid decrease in the concentration of the acidic solution in the acid washing tank and ensuring the acid washing effect of the quartz sand.

The invention discloses lightweight high-strength foamed concrete based on modified desert sand and a preparation method thereof, and the lightweight high-strength foamed concrete is prepared from the following raw materials by weight: 300-400 parts of cement; 150 to 250 parts of modified desert sand; 50 to 100 parts of a mineral admixture; 3-8 parts of a composite foaming agent; 5-15 parts of a composite admixture; 180 to 260 parts of water; wherein the modified desert sand is dried after being subjected to acid pickling and water washing to be neutral, and the particle size range of the modified desert sand is 0.1-0.6 mm. The mineral admixture is at least one of fly ash and slag powder. Through modification treatment of desert sand and collaborative optimization of a formula and a process, the foamed concrete which is light in weight, high in strength and excellent in heat preservation and heat insulation performance is successfully prepared, the problem that river sand resources in desert areas are deficient is solved, high-value utilization of solid waste resources is achieved, and the foamed concrete has remarkable economic value, social value and environmental protection value and is worthy of popularization and application. Wide application prospects are realized in the field of building wall prefabricated materials.

The utility model belongs to the technical field of quartz sand production, and particularly relates to pickling equipment for high-purity quartz sand, which comprises a tank body, a feed port is arranged at the top of the tank body, a discharge port is arranged at the bottom of the tank body, a stirring and heating mechanism is arranged in the tank body, and the stirring and heating mechanism comprises a hollow rotating shaft and a plurality of stirring paddles. The stirring paddles are evenly arranged on the hollow rotating shaft, the upper end of the hollow rotating shaft penetrates through the center of the top wall of the tank body, a driving assembly is arranged on the outer top wall of the tank body, and a cleaning mechanism is arranged on the inner wall of the top of the tank body and comprises a plurality of high-pressure spray heads and a cleaning pipeline. The cleaning pipeline is arranged along the circumference of the top of the tank body, and the plurality of high-pressure nozzles are uniformly arranged on the cleaning pipeline. The device can effectively improve the pickling efficiency of quartz sand.

This invention discloses an information-based monitoring and management method and system for galvanizing production processes. Utilizing a SCADA+SKF multi-parameter visualization monitoring platform, it acquires the internal and surface defect characteristics of production components corresponding to risk nodes where oxidized mixtures intrude at unit temperatures. Combining data from manually involved processes, impurity introduction, acid washing concentration, and temperature and humidity changes, it obtains an oxidized mixture distribution impact assessment model through an edge computing gateway, generates an oxidized mixture distribution matrix per unit time, and conducts impact degree analysis and impurity source tracing to calculate the galvanizing compliance rate. Furthermore, through a bidirectional categorical variable chi-square test of defects and compliance rate, it identifies key interference factors and stores the quality assessment results, achieving intelligent monitoring and optimized management of the entire galvanizing process. This invention realizes closed-loop intelligent control from data acquisition and process modeling to quality analysis, significantly improving the stability, automation level, and product compliance rate of the galvanizing process.

The invention belongs to the technical field of heating radiator machining, and particularly relates to a heating radiator anti-corrosion treatment machining method which comprises the steps that S1, a to-be-machined heating radiator is subjected to polishing treatment, after surface oxide skin and burrs are removed, acid pickling, water washing and drying treatment are conducted in sequence, and a pretreated heating radiator is obtained; s2, the pretreated heating radiator is subjected to etching treatment through a micro-nano etching agent, washing and drying are conducted after etching, and an etched heating radiator is obtained; s3, the inner surface and the outer surface of the etched heating radiator are evenly coated with the silane coupling agent base coating liquid to form a coating, flash drying and low-temperature pre-curing treatment are conducted, and the surface-modified heating radiator is obtained; s4, within 60 min after flash drying and low-temperature pre-curing treatment are completed, fluorocarbon anti-corrosion paint is sprayed to the inner surface and the outer surface of the surface-modified heating radiator through the electrostatic spraying technology; and S5, the sprayed surface-modified heating radiator is placed in baking equipment, coating curing is conducted, the heating radiator is cooled to the room temperature, anti-corrosion machining is completed, double combination of physical occlusion and chemical bridging is achieved, and the adhesive force of the coating is improved.

The invention discloses a multipurpose tray system for automatic loading, acid pickling and cleaning of ceramic shells. The system comprises a tray body and a Teflon anti-corrosion coating arranged on the surface of the tray body, the tray body is made of a rigid grid structure formed by welding 304 stainless steel wires and is provided with an upper grid frame, a middle grid frame and a lower grid frame which are of a three-layer detachable structure, and the layers of grid frames are connected in an up-down clamping mode. Supporting legs are arranged at the top corners of all the grid frames, and stacking grooves are correspondingly formed in bottom frames of all the grid frames, so that stable stacking of multiple trays is achieved. A steel wire mesh bearing structure is arranged in each grid frame, a stainless steel frame is arranged on the periphery of each grid frame, and mechanical arm grabbing grooves and positioning holes are formed in the frames. By means of the structure, transparent cleaning and automatic transfer of the ceramic shell can be achieved in the procedures of automatic loading, acid pickling, cleaning, drying, detecting and the like, the transfer efficiency, the cleaning uniformity and the corrosion resistance are improved, and the device is suitable for continuous production of the new energy relay ceramic shell.

The invention discloses a preparation method of a high-filling powder master batch for a tray, and belongs to the technical field of chemical processing, the high-filling powder master batch for the tray comprises the following raw materials in parts by weight: 80-88 parts of inorganic powder, 3-5 parts of a coupling agent, 1-3 parts of a lubricant, 1-3 parts of an antioxidant and 15-25 parts of resin, and the high-filling powder master batch for the tray is prepared from the following raw materials in parts by weight: 80-88 parts of inorganic powder, 3-5 parts of a coupling agent, 1-3 parts of a lubricant, 1-3 parts of an antioxidant and 15-25 parts of resin. The inorganic powder comprises carbonate powder and sulfate powder which are combined in proportion, the inorganic powder is filtered and sorted before being used, it is guaranteed that the median diameter of the fineness of the used inorganic powder ranges from 0.1 micrometer to 10 micrometers, then magnetic separation impurity removal, pickling passivation and magnetic separation metal chippings are conducted, and the inorganic powder is obtained. The activity of metal ions on the surface of the powder is reduced through acid pickling and passivation, catalytic oxidation of the metal ions is avoided, and the coupling agent is a macromolecular coupling agent and comprises maleic anhydride grafted polypropylene and an ethylene-acrylate copolymer. According to the preparation method of the high-filling powder master batch for the tray, multiple adjustments and cooperation are achieved, and the product quality is greatly improved.

The invention relates to an efficient scandium extraction method for scandium-containing aluminum slag based on nitric acid gradient leaching, and belongs to the technical field of valuable metal recovery in smelting slag. The scandium-containing aluminum slag is pretreated; the pretreated scandium-containing aluminum slag is subjected to gradient temperature control leaching; first-stage leaching: leaching aluminum and magnesium impurities from a low-temperature and low-concentration nitric acid solution, and carrying out solid-liquid separation to obtain leaching residues; second-stage leaching, specifically, scandium is leached out of the leaching residues in a targeted mode through a high-temperature high-concentration nitric acid solution, and scandium-containing nitric acid leaching liquid is obtained; and a purification process: carrying out extraction, acid pickling impurity removal and reverse extraction on the scandium-containing nitric acid leaching solution to obtain Sc (OH) 3 precipitate. According to the method, scandium in the scandium-containing aluminum slag can be effectively recycled, and the method is simple in technological process, mild in reaction condition and free of high pressure.

The utility model relates to a multipurpose cleaning blowing nozzle which is used for blowing liquid on the surface of a steel wire and comprises an air duct, a limiting ring, a limiting nut and a wear-resistant sleeve, a steel wire channel is formed in the air duct, the limiting ring and the limiting nut are arranged at the two ends of the air duct respectively, and the limiting ring and the limiting nut are matched to fix the air duct on an air collecting box; one end part of the air duct is provided with a wear-resistant sleeve, the wear-resistant sleeve is one of a ceramic mold core and a bearing steel mold core, and the wear-resistant sleeve is different in type and application environment; at least two sets of air holes are further formed in the side wall of the air duct, the multiple sets of air holes are distributed at intervals along the axis of the air duct and are close to the wear-resistant sleeve, each set of air holes comprises a plurality of air blowing holes evenly distributed in the annular direction, the air blowing holes communicate with the steel wire channel, the air blowing holes incline towards the wear-resistant sleeve, and liquid is blown away as soon as possible. The device not only can be applied to an acid washing environment, but also can be applied to an alkali washing environment, simultaneously ensures that liquid on the surface of the steel wire is dried, and prevents residual liquid from flowing to the next process.

The invention relates to an evaluation method of a building material mortar mix proportion, and belongs to the technical field of building materials. The evaluation method comprises the following steps: drying a to-be-detected sample to constant weight, weighing the initial mass m0 of the sample, putting the sample into a high-temperature furnace, calcining, and weighing the mass m1 of the sample; grinding the calcined sample in a mortar, so that a hydration product adhered to the sand is separated; the ground sample is placed on a sieve to be screened, the mass of oversize products and the mass of undersize products are weighed, the oversize products are recorded as m2, and the undersize products are recorded as m3; soaking oversize products with an acetic acid solution, stirring and cleaning the oversize products on a sieve, drying the oversize products to constant weight, recording the weight as m4, combining the mass lost by pickling with m3, and recording the combined mass as m5; and calculating the value of the sand-glue ratio m4 / m5, comparing with a design value, and judging whether the sand-glue ratio is qualified or not. According to the invention, the aggregate and the cementing material of the mortar subjected to hydration reaction after construction can be effectively separated, the mortar-to-sand ratio of the mortar for construction can be accurately calculated, and whether the mortar is qualified or not can be judged.

This invention discloses a method for preparing a hydrogen-barrier anion exchange membrane using a roller-type impregnation method. In a continuous fabrication production line, a porous mesh is drawn into a membrane solution tank, where the membrane solution impregnates the mesh. After impregnation, protective films are applied to both the top and bottom sides of the mesh. Following film application, the mesh is drawn into a pre-heating oven for heat treatment. After leaving the pre-heating oven, the protective films are peeled off. The mesh is then drawn into a post-heating oven for post-treatment. After post-treatment, the mesh is drawn into an acid bath for acid washing. After acid washing, the mesh is drawn out of the acid bath, thus obtaining the hydrogen-barrier anion exchange membrane. The hydrogen-barrier anion exchange membrane obtained by this invention has a water content of approximately 10-20%, and its surface resistivity measured in 0.5M hydrochloric acid is approximately 2-6 ohm·cm. 2 The migration number can reach 0.98; when assembled into an electrodialysis device, hydrochloric acid can be concentrated from 1 mol / L to 3 mol / L, and the current efficiency of the concentration process is over 50%.

The invention provides a filter membrane cleaning method, and particularly relates to the technical field of membrane cleaning. The cleaning method comprises the following steps: sequentially feeding a to-be-treated filter membrane into an alcohol tank and a first water washing tank, and pre-cleaning by adopting alcohol and pure water respectively; feeding the pre-cleaned filter membrane into a pickling tank, and performing pickling in a pickling solution with the temperature of 20-40 DEG C and the mass concentration of 0.1-1%; feeding the filter membrane subjected to acid washing into an alkali washing tank, and carrying out alkali washing in an alkali washing solution with the temperature of 20-30 DEG C and the mass concentration of 0.1-1%; feeding the filter membrane subjected to alkali washing into a second washing tank, and washing with pure water; and drying the washed filter membrane to obtain the high-cleanliness filter membrane. The cleaning method is simple and efficient in process, the cleaned filter membrane is low in heavy metal content and few in dissolved matter, and the cleaning method is suitable for filtering in the microelectronic industry.

The invention provides a full-automatic silicon material constant-temperature cleaning system and a constant-temperature cleaning device. The system comprises a sorting subsystem, a pre-cleaning subsystem, an acid pickling subsystem, a final water washing subsystem, a drying subsystem and a constant-temperature control subsystem, wherein the sorting subsystem is used for sorting silicon materials; the sorted silicon materials are sequentially conveyed to the pre-washing subsystem, the acid pickling subsystem, the final water washing subsystem and the drying subsystem to be subjected to pre-washing, acid pickling, final water washing and drying respectively; and the constant-temperature control subsystem is used for carrying out constant-temperature control on the temperature and the drying temperature of cleaning liquid in the pre-washing subsystem, the acid washing subsystem, the final water washing subsystem and the drying subsystem. According to the full-automatic silicon material constant-temperature cleaning system and the constant-temperature cleaning device, automatic sorting of supplied materials is achieved, full-automatic constant-temperature cleaning is achieved by analyzing the sorted silicon materials and adjusting equipment parameters, and then the cleaning efficiency is improved.