55results about How to "Accelerated settlement" patented technology

The application discloses a separation system for recycling leaf filter waste residue in an alumina production process, comprising a pressure separation device, a feed pump connected between a leaf filter waste residue slurry source and a feed inlet of the pressure separation device, an external tank dilution circuit, an overflow outlet of the pressure separation device connected to an inlet front end of the feed pump through a shunt pipeline, a underflow pump connected to an underflow outlet of the pressure separation device, a vacuum belt filter connected to an outlet of the underflow pump, a pulping tank arranged below a filter cake discharge outlet of the vacuum belt filter, and a conveying pump connected between an outlet of the pulping tank and a pre-desilication process of an alumina production system. Through the synergistic effect of high solid content mud layer sedimentation technology and external tank dilution technology, the industry problem that leaf filter waste residue is difficult to settle, concentrate and filter and separate due to easy hydrolysis under the condition of low caustic alkali concentration and low molecular ratio and a large amount of fine planktonic matter is effectively solved.

The utility model relates to a dust explosion protection system for a chemical workshop. The dust explosion protection system comprises a dust removal assembly and a spraying assembly, the dust removal assembly comprises a dust removal box, an air inlet pipe and an air outlet pipe are connected to the dust removal box, a filter cloth frame and a screen plate are installed on the inner wall of the dust removal box, a plurality of pieces of filter cloth are connected between the filter cloth frame and the screen plate, an exhaust fan is installed in the dust removal box, a transmission rod penetrates through the center of the exhaust fan, and a driving motor is installed on the outer side of the dust removal box; a worm is in butt joint with the driving motor, a turbine is meshed with the worm, and the turbine is in butt joint with the transmission rod; the spraying assembly comprises a piston pump, a water inlet pipe and a water outlet pipe are in butt joint with the piston pump, the piston pump comprises a pump shell, a rotary disc is installed in the pump shell, a connecting rod is hinged to the rotary disc, a piston is hinged to the connecting rod, a rotary shaft penetrates through the center of the rotary disc, a first gear is in butt joint with the rotary shaft, a second gear is meshed with the first gear, and the second gear is in butt joint with a worm. And the driving motor can drive the piston pump to operate while driving the draft fan to operate.

The present application relates to the technical field of coal mining simulation experiment equipment, in particular to a mine coal mining working face support simulation experiment device, which comprises an experiment box made of transparent glass material, a plurality of support plates are supported by a plurality of hydraulic cylinders at the bottom of the experiment box, a rock mass collapse simulation mechanism is arranged above the support plates, the rock mass collapse simulation mechanism is used for simulating the pressure of the support plates when the rock mass above the coal mining roadway working face breaks and collapses, so as to adjust the support strength of the support plates in the coal mining roadway, a discharge control assembly is arranged in the experiment box, the discharge control assembly is used for discharging the rock blocks above the support plates in a controlled amount, which facilitates the pressure simulation experiment of the rock mass collapse simulation mechanism on the support plates, so that the support safety and stability of the support plates in the coal mining working face on the goaf can be simulated, and more accurate data support can be provided for the construction personnel when supporting the support plates in the coal mining working face.

A kind of double half-ring type anti-settling buried protection device, including buried cylinder, buried upper cover and two clamps;The buried cylinder is the cylinder that is permeable up and down, the upper end of the buried cylinder is integrally formed with the detection cylinder section for built-in installation and protection gas detector;The buried upper cover can be detachably installed at the upper end of the detection cylinder section, for closing the upper port of the detection cylinder section, so as to protect gas detector when burying;Two clamps are detachably connected together and tightly embrace on the outer circumference of the detection cylinder section;The outer circumference of the clamp is integrally formed with anti-settling half-ring, and two anti-settling half-rings are synthesized into whole circular anti-settling ring.The buried cylinder of the utility model can effectively increase the contact reliability with the earth by two anti-settling half-rings, so that the buried cylinder can be stably fixed in the earth, the pressure capacity of buried protection device is enhanced, and settlement is avoided, and the design of two clamps can effectively reduce the installation difficulty of the whole device.

The utility model relates to a heat supply unit automatic exhaust equipment technical field, specifically speaking is a kind of heat supply unit primary network supplement secondary network automatic exhaust device, including jar body, the water inlet pipe and water outlet pipe for supplementing water are provided in the jar body periphery;Water source after the turbulence of the type plate will enter conical pipe, the spiral groove of conical pipe inner periphery is convenient to the water source and makes water source form spiral force pass through conical pipe and enter the bottom side of jar body, simultaneously, small particle solid and float carried in water source can be thrown to the inner wall on the bottom side of jar body under the centrifugal force generated by spiral conveying, and it is convenient to settle in jar body bottom, and the conical pipe of conical structure is convenient to the interception of small particle solid and float, and the vertical pipe of ring seat inner periphery in the bottom of conical pipe can be convenient to the water source of reflux and spiral conveying and shunt, to further reduce the condition that small particle solid and float are moved by water source and move accordingly.

The utility model relates to the field of integrated stove accessories, and particularly discloses a volute filter screen of an integrated stove, which is fixed at an air inlet of a fan volute of the integrated stove and comprises an oil guide cover protruding from the periphery to the middle, the oil guide cover protrudes towards the outside of the fan volute of the integrated stove, and a plurality of long air guide holes are distributed in the oil guide cover along the circumferential direction. The air guide hole is bent into an arc shape in the rotating direction of the integrated cooker fan, and the air inlet face of the air guide cover is located on the edge of one side of the air guide hole and provided with a guide edge inclining in the air inlet direction. The oil fume can be guided into the fan volute of the integrated cooker in a spiral shape, noise is reduced, wind power is increased, and meanwhile collision, fusion and sedimentation of oil dirt particles are facilitated.

This utility model relates to the field of color steel fences, specifically to a color steel fence with dustproof function, including posts, beams and vertical grids, and also includes a dustproof component. The dustproof component includes a water tank, a connecting pipe, a central box, an atomizing nozzle and an injection component. The water tank is fixedly connected to the posts, the connecting pipe is connected to the water tank through the injection component, the central box is fixedly connected to the posts and connected to the connecting pipe, the atomizing nozzle is set on the central box, and the injection component is set on the water tank and connected to the connecting pipe. After the water is atomized and sprayed out by the atomizing nozzle, it can prevent the dust generated during the construction work in the temporary protected area from spreading to the outside of the fence.

The application relates to the technical field of foundation pit backfilling, in particular to a foundation pit backfilling process and a foundation pit bottom cleaning device, which comprises a foundation pit bottom cleaning device, the foundation pit bottom cleaning device comprises a bearing bottom frame, loading support rods are correspondingly arranged on the front upper side of the bearing bottom frame, a bearing frame is arranged at the upper end of the loading support rod, and a conveying assembly is mounted on the front side of the bearing frame; the foundation pit bottom cleaning device can realize height regulation and control of the conveying assembly, so that the conveying assembly can better clean the garbage generated during the foundation pit bottom cleaning; the bearing frame in the foundation pit bottom cleaning device is obliquely arranged, the stress stability of the conveying assembly during garbage bearing and transportation is higher, the positioning and guiding effect of the winding wheel during the winding of the steel cable is good under the action of the guide wheel, the lifting control effect of the conveying assembly is better, the stress stability is higher, the overall use effect during the foundation pit bottom cleaning is good, and the efficiency is high.

The present application relates to the technical field of oil and gas well completion, and discloses a method and device for regulating supercritical state of bottom fluid of a well fractured by supercritical carbon dioxide. The method comprises the following steps: liquid CO2 fluid in a storage tank is injected into a wellbore in sequence after being heated and pressurized by a fracturing pump truck, and the CO2 fluid at the entrance of the wellbore reaches a preset temperature; the CO2 fluid at the preset temperature is in a supercritical state when reaching the bottom of the well through the wellbore; when the temperature of the CO2 fluid at the entrance of the wellbore is lower than the preset temperature, the input power of a heating device is increased; when the temperature of the CO2 fluid at the entrance of the wellbore is higher than the preset temperature, the input power of the heating device is reduced. The method keeps the temperature of the CO2 fluid near the bottom of the well at about 32 DEG C during the whole fracturing process, prevents the decrease of the carrying capacity of supercritical CO2 for proppants due to excessively high temperature, avoids the accelerated settlement of the proppants due to the existence of a large section of supercritical CO2 fluid in the wellbore, and saves the cost of heating low-temperature CO2 fluid on the ground.

The application discloses a coarse-fine separation mechanism of a grading powder separator and application thereof, and the coarse-fine separation mechanism comprises, from bottom to top, a wind distribution and material distribution area and a pre-scattering and coarse particle grading area which are connected with each other; the wind distribution and material distribution area comprises an air inlet shell, an air inlet, a coarse particle outlet, a flow guide cone and a ring-shaped air ring; the pre-scattering and coarse particle grading area comprises a coarse particle separation shell, a coarse particle separation rotating cage, a material distribution device and a coarse particle separation drive; a material lifting platform is arranged between the coarse particle separation shell and the air inlet shell, and the material lifting platform is located at the outside of the material distribution area outlet and is adjacent to the ring-shaped air ring at the lower side; the coarse particle separation drive is connected with the coarse particle separation rotating cage and the material distribution cone platform through a shaft system, and is used for driving the coarse particle separation rotating cage and the material distribution cone platform to rotate. The application is a kind of mechanism with the functions of scattering, material distribution and coarse-fine particle separation, can be well matched with a traditional dynamic powder separator, complete more clear particle separation, and solve a series of problems caused by the common problems of V selection.

This utility model belongs to the technical field of auxiliary equipment for construction projects, and relates to a waste crushing device for construction projects. It includes an upper drying oven detachably mounted on a lower crushing box. The inner cavity of the upper drying oven is connected to the lower crushing box via opposing feed plates. A water tank is located at the bottom of the inner cavity of the lower crushing box, and a return feed filter plate is located above the water tank. The two feed plates and the side wall of the upper drying oven form a first cavity and a second cavity. A screw sealing component is installed in the first cavity, and a cooling spray assembly is installed in the second cavity. This utility model uses the upper drying oven to buffer and heat the sand and gravel waste, and then uses the cooling spray assembly to rapidly cool the sand and gravel in the lower crushing box. The synergistic effect of heating and cooling reduces the hardness of the sand and gravel, making it easier to crush. The water used in the cooling spray process can flow back to the water tank, reducing water waste. Furthermore, the sprayed water mist can fully contact the dust, causing the dust to settle quickly, thereby effectively reducing the dust concentration during the crushing process.

The coke breeze cyclone separator comprises a first cylinder, a volute body, a first conical cylinder and an exhaust pipeline, gas containing coke breeze enters the volute body from a gas inlet, flows along the inner wall of the volute body and is guided to form a rotating vortex, and spirally flows downwards towards the conical cylinder along the first cylinder; the coke breeze is thrown to the inner wall of the first cylinder under the action of centrifugal force, the coke breeze loses inertia force and falls into the dust collecting hopper along the wall face, treated gas continuously flows into the center in the descending process in the conical cylinder to form centripetal radial airflow, the central airflow spirally ascends and enters the exhaust pipeline, and spiral blades are arranged on the inner wall of the exhaust pipeline in the exhaust direction. The spiral direction of the spiral blades is opposite to the spiral direction of gas, the spiral blades and spiral airflow generate shearing force, the stability of the airflow is destroyed, the airflow forms rising micro-turbulent flow between the blades, coke breeze collides with the inner wall of the exhaust pipeline and the blades, secondary separation in the exhaust pipeline is achieved, and the powder discharging efficiency of the coke breeze cyclone separator is improved.

This invention discloses a pure magnesium and its purification method. The purification method specifically includes the following steps: (1) placing pure Mg into a crucible and placing it in a melting furnace, setting the temperature of the melting furnace to 650~670℃, and introducing CO. 2 and SF 6 The mixture is protected with a gas mixture. After the pure Mg melts, the temperature is raised to 690~720℃. The Mg-5Mn master alloy is added to the crucible. After it is completely melted, the melt is stirred to make the alloy composition uniform. (2) Remove the slag on the surface of the melt, add the refining agent to the melt, and stir it thoroughly. Let it stand for 30~50 min. (3) After the melt cools down, a high-purity magnesium ingot is obtained. This invention can effectively reduce the Fe impurity content in magnesium metal and reduce the inclusions in magnesium metal.

This application relates to the field of demulsifiers, and more specifically, to an oil sludge demulsifier, its preparation method, and its application. An oil sludge demulsifier comprises the following components in the following mass ratio: 20-35 parts of a surfactant complex, 7-12 parts of an alkyl sulfate sodium cosolvent, 0.6-1.8 parts of a stabilizer, and 48-55 parts of water; wherein the surfactant complex comprises hyperbranched polyamide amine and polyether amine modified magnetic nanoparticles. This oil sludge demulsifier improves upon the problems of existing demulsifiers, such as low dehydration capacity, slow dehydration speed, poor demulsification effect, and low oil content, thereby improving the demulsification performance and dehydration efficiency, and achieving effective separation of oil sludge.

This invention discloses a method for cyclically separating waste positive electrode current collectors and positive electrode materials using NMP, comprising the following steps: adding the positive electrode sheet to an NMP solution, stirring, and sieving to obtain a positive electrode cleaning filtrate and aluminum foil; adding a flocculant to the positive electrode cleaning filtrate, stirring, and allowing it to stand for solid-liquid separation to obtain crude NMP solution and positive electrode material powder; adding a dehydrating agent to the crude NMP solution, filtering to remove solids to obtain a recovered NMP solution, which is then recycled for the separation of the positive electrode current collector and positive electrode material. This method reuses the NMP solution repeatedly, thus reducing costs and solving the problem of high costs associated with organic solvents. Furthermore, by introducing non-solvent water into the system, the thermodynamic stability of the system is altered, increasing the solubility of PVDF and accelerating the dissolution rate.

This utility model relates to the field of workshop purification technology, specifically to a high-cleanliness cleanroom for chip packaging. It includes a connecting plate installed inside the workshop wall, with a ventilation duct fixedly connected to one side of the connecting plate. A ventilation opening is provided inside the connecting plate, and the interior of the ventilation duct is connected to the ventilation opening. A ventilation fan, a first filter plate, and a second filter plate are installed inside one end of the ventilation duct. Along the airflow direction from the ventilation opening to the ventilation fan, the second filter plate, the first filter plate, and the ventilation fan are arranged sequentially. This utility model utilizes a flow-guiding component, including multiple baffles, where one end of each baffle contacts the side of the second filter plate away from the first filter plate. This effectively buffers, decelerates, and guides the high-speed, dust-laden airflow entering the ventilation duct. Simultaneously, a cleaning component, including a scraper structure slidably mounted on the top of the baffles, enables the cleaning of deposits on the surfaces of the multiple baffles.

This application provides a configuration method and related apparatus. During the configuration of AOP and TrustZone, it is necessary to first query the configuration status of TrustZone. Upon confirming that TrustZone configuration is complete, it can also be confirmed that xPU is enabled. Then, when xPU is enabled, the configuration parameters of AOP are read through xPU to complete the AOP configuration. This application adjusts the timing during the configuration process, placing the step of reading the AOP configuration parameters through xPU after querying the TrustZone configuration status. This avoids system crashes caused by calling xPU when it is not enabled, improving the success rate of internal system environment configuration and enhancing user experience.

This utility model relates to a coke powder separation system in a coke removal tank of an ethylene plant. The system includes a coke removal tank comprising a main coke removal tank and a secondary water tank arranged sequentially. The main coke removal tank and the secondary water tank are separated by an overflow plate device. The overflow plate device includes an overflow plate at the bottom and a gate plate located above the overflow plate and movable up and down relative to the overflow plate. The gate plate adjusts the opening of the overflow opening between the two tanks as its position relative to the overflow plate changes. The system also includes a filter device located adjacent to the gate plate and downstream of the overflow opening. The advantage is that it effectively separates coke powder, thereby reducing blockage of the downstream drainage pipe.

The utility model relates to the technical field of dust falling in non-metal mine production, and particularly discloses a dust falling device for a non-metal mine production processing workshop, which comprises a bottom plate and a processing workshop body arranged on one side of the bottom plate, and a dust falling mechanism is arranged at the top of the bottom plate; the dust falling mechanism comprises a dust removal box fixedly mounted at the top of the bottom plate through supporting legs and a water tank arranged behind the dust removal box and fixedly mounted at the top of the bottom plate, the top of the dust removal box sequentially communicates with an air outlet pipe and a fixed cylinder from left to right, and a spraying pipe is fixedly mounted at the top end in the fixed cylinder; by means of the mode that active atomization dust falling and passive efficient dust removal are combined, the complex environment with multiple dust production points in a non-metal mine machining workshop is accurately dealt with, the dust falling device has the advantages of being high in dust falling efficiency, low in energy consumption, convenient and fast to maintain and the like, the workshop operation environment is effectively improved, dust pollution is reduced, and the environment protection effect is good. The environmental protection and safety requirements of industrial production are met.

The application belongs to the technical field of water purifying agent preparation, and provides a composite polyaluminum chloride water purifying agent and a preparation method thereof; first, polyaluminum chloride mother liquor with high polymerization degree is prepared by a high-temperature and high-pressure hydrothermal method as an inorganic skeleton, ferrous sulfide / magnetic iron oxide composite nanocrystal cores are hydrothermally synthesized by using ferrous sulfate heptahydrate, thiourea and trisodium citrate, and a cationic / anionic polymer composite template is constructed by using sodium lignosulfonate and cationic polyacrylamide, further, calcium and magnesium ions chelated by glycine are introduced to form a chemical precipitation precursor which can be released in water, and the above functional modules are sequentially added to the polyaluminum chloride mother liquor according to an optimized adding sequence, so that the nanocrystal cores, the polymer template and the calcium and magnesium precursor are orderly self-assembled in the mother liquor, and an integrated composite coagulant with coagulation, adsorption and chemical precipitation phosphorus removal functions is obtained.

The invention discloses a textile printing and dyeing wastewater treatment device, and particularly relates to a flocculation treatment process technology of textile sewage, the textile printing and dyeing wastewater treatment device comprises a flocculation tank, a micro-sand polymerization tank and a clarification tank which are sequentially arranged along the flow direction of the sewage, and a baffle plate is arranged between the micro-sand polymerization tank and the clarification tank; a water outlet which is formed by the baffle plates and enters the clarification tank is infinitely close to the tank bottom of the clarification tank, and a sand blocking baffle module which is distributed above the water outlet is fixedly mounted in the clarification tank; the sand blocking baffle module is composed of a plurality of inclined plates distributed in a matrix mode, and first elastic shifting plates are arranged on the inclined plates at intervals. The movable frame horizontally moves back and forth in the sewage flowing direction. According to the device, light floc can be subjected to secondary trapping and sedimentation strengthening near the water outlet, the possibility that the floc is lost along with effluent is reduced on the premise that energy consumption and the dosage of chemicals are not remarkably increased, and the solid-liquid separation efficiency of textile wastewater is improved.

The utility model discloses a decoration dust adsorption and purification integrated equipment, include: the car body, the top of car body is provided with the casing, and the left side inside of casing is provided with dust removal bucket, the right side inside of casing is provided with dust removal cloth bag, and the below of dust removal cloth bag is installed with fan, the top of left and right sides of casing all is provided with the gear ring, and the middle part of left and right sides of casing all is provided with the buckle, the outside of gear ring is connected with the handle, and the inside of gear ring is provided with the gear, and the inside of gear is connected with the pressing plate, the wind cylinder is fixedly connected with the left cover plate at the bottom, and the top outside of wind cylinder is connected with the suction tube, and the top of wind cylinder is connected with the air pipe. This decoration dust adsorption and purification integrated equipment, convenient for adsorption and subsidence to dust, convenient dust purification, still can carry out secondary filtration to dust, convenient fan operation, also convenient dust cleaning.

This utility model relates to the field of poultry and livestock breeding technology, specifically a poultry and livestock breeding deodorizing agent spraying device. It includes a vehicle body, a conveying mechanism, a swinging mechanism, two connecting pipes, two covers, and two adjusting mechanisms. The conveying mechanism includes a storage box and connecting components. The swinging mechanism includes a driving component, two fixed sleeves, two connecting rods, and two rotating components. Each adjusting mechanism includes a fixed plate, a movable plate, and a fine-tuning component. The fine-tuning component allows several first spray holes to be staggered with several second spray holes, enabling adjustment of the droplet size sprayed through the covers. This allows for targeted spraying based on the different odor concentrations and generation rates in different areas of the farm (such as livestock activity areas, manure ditches, feed troughs, and rest areas), rather than indiscriminate spraying across the entire space. This effectively avoids waste of deodorizing agents and poor deodorizing effects.

This invention belongs to the field of sulfur preparation technology and discloses an insoluble sulfur processing and crushing assembly, comprising: a shell section and a crushing shaft, the crushing shaft being rotatably mounted on the top of a conical shell for crushing sulfur; a circulation section, fixedly mounted on the bottom surface of the conical shell for circulating liquid inside the conical shell; and a screening and grading section, fixedly mounted on the inner wall of the conical shell for grading sulfur in the vertical direction. In the insoluble sulfur processing and crushing assembly and mixing reactor provided by this solution, a cleaning and stirring sleeve is installed. While the sleeve rotates with the shaft to crush the sulfur, it continuously cleans the surface of the screening and grading section below, thereby keeping the sieve holes unobstructed and ensuring that qualified powder can be discharged in a timely manner. This avoids disorderly grinding of materials in a single chamber and ensures that particles are separated as soon as they are qualified, greatly reducing over-crushing.

The utility model relates to the technical field of water ecological purification, and discloses a multifunctional ecological combined base net which comprises a floating body, the floating body floats on the water surface and is designed at the rear end of an upstream face, a base net body is installed at the lower end of the floating body and arranged in a water area, and the floating body is connected with the base net body. And a high-strength phosphorus removal filler is mounted at the lower end of the base net body. According to the multifunctional ecological combined base net, the base net body is of a latticed structure and a mesh structure, plant roots are fixed, emergent aquatic plants and submerged plants are assisted to grow, the self-cleaning capacity of a water body is enhanced, a biological fiber rope is installed in the base net body and is of a bionic structure, and the bionic structure attracts microorganisms; meanwhile, organic matters are decomposed through microbial metabolism, pollutants such as nitrogen and phosphorus in the water body are reduced, meanwhile, the geotechnical cloth and the ecological base net form a multi-layer net-shaped structure, and the multi-layer net-shaped structure can slow down the flow speed, promote sediment and suspended matter sedimentation and improve the transparency of the water body.

The application discloses a mine exploitation drilling machine with a drilling direction guiding device, and belongs to the technical field of mine exploitation equipment. The mine exploitation drilling machine comprises a first guiding device and a second guiding device. The first guiding device comprises a first guiding rod, and a fiber torque sensor and a guide bead are mounted on the inner wall of the first guiding rod. The second guiding device comprises a second guide rod, one end of the second guide rod is fixedly connected with a rotating ball, the other end of the second guide rod is provided with a blocking ring, a guide sleeve is sleeved on the second guide rod, sliding grooves are uniformly distributed on the outer side of the guide sleeve, first sliding blocks are arranged in the sliding grooves, and the first sliding blocks are hingedly connected with first hydraulic cylinders. The mine exploitation drilling machine with the drilling direction guiding device is provided, the first direction guiding device and the second direction guiding device are arranged to guide the drilling direction, the second hydraulic cylinder and the third hydraulic cylinder are arranged to adjust the initial drilling angle of the drilling machine, the dust collecting cover and the dust collecting box are arranged to prevent dust raising, and the water mist spraying system can form larger particle groups from dust particles.

The invention discloses a preparation method and application of an organic silicon modified aluminum-zirconium / titanium bimetallic composite fluorine removal agent (CSAZ / CSAT), and belongs to the technical field of water treatment. Zirconium tetrachloride or diluted titanium tetrachloride is compounded with aluminum chloride to construct a bimetallic framework. Meanwhile, vinyltriethoxysilane (VTES) is introduced as an organic modifier, and heterogeneous copolymerization is carried out on an organic silicon hydrolysate and metal hydroxyl by controlling the dripping rate and the reaction temperature. According to the fluorine removal agent, by utilizing the bridging effect of organic silicon and the synergistic effect of double metals, the adsorption, complexation and net capture capacities on fluorine ions are remarkably enhanced. Experiments show that when the molar ratio of Al to Zr is 9: 1 (CSAZ) or the molar ratio of Al to Ti is 14: 1 (CSAT), the defluorination effect is optimal. When the agent is applied, the pH value does not need to be adjusted, a coagulant aid does not need to be added, efficient removal of fluorine ions can be achieved only through a single agent, the agent has the advantages of being low in dosage, neutral in effluent pH value and the like, and the industrial problems that a traditional fluorine removal process is long in process, large in acid and alkali consumption and difficult in sludge treatment are effectively solved.

The invention discloses a preparation method and application of cobalt hydroxide based on seed crystal circulation and special active magnesium oxide. Through cooperation of a seed crystal circulation technology and a special auxiliary agent, the generated cobalt hydroxide is converted into a core of subsequent crystal growth, uniform and thick growth of the cobalt hydroxide is guided, and the industry bottleneck that the underflow concentration of a thickener is low when high-activity magnesium oxide is adopted for cobalt precipitation is effectively solved. The average particle size (D50) of the product is increased from 16.81 [mu] m to 21.81 [mu] m or above, the underflow concentration is increased from 27% to 28-30%, and the sedimentation and compaction performance of ore pulp is remarkably improved. While excellent physical properties are obtained, the chemical quality of the product is excellent, the cobalt content reaches 40% or above, and the magnesium residue is lower than 5%. The process economy is outstanding, the cobalt precipitation rate is increased to 98% or above, and the unit consumption of magnesium oxide is reduced to 0.70-0.71 t / t Co. According to the method, the seed crystal derives from the process, parameter regulation and control are flexible, compatibility with an existing production line is good, and large-scale industrial application prospects are achieved.

The utility model discloses a dust falling device for building construction, which comprises a water tank and a water spraying component which are symmetrically arranged on two sides of a road, the water spraying component comprises a mounting bracket, a connecting pipe is mounted on the mounting bracket, a plurality of nozzles are mounted on the connecting pipe, a centrifugal pump is mounted in the middle of one side of the water tank, and a water inlet end of the centrifugal pump is connected with the water tank. The water outlet end of the centrifugal pump is connected with the connecting pipe through a water pipe. Water flow is jetted through the nozzle to form a water band to adsorb flying dust, so that the flying dust is treated, water jetted by the nozzle is recycled through the water tank, on one hand, waste of water resources can be reduced, and on the other hand, a road can be prevented from being moist.

This utility model provides an impeller sand washing machine, belonging to the technical field of sand washing devices. The impeller sand washing machine includes: a water tank body, an impeller with buckets, and an electric drum. The water tank body is divided into a sand washing zone and a sedimentation zone, separated by a partition. The partition has an outlet for the sand washing zone. The electric drum houses a motor and a reducer, and its two ends are fixed to a support frame on the top of the water tank. The impeller is fitted onto the electric drum and rotates with it. The impeller consists of an impeller hub, flanges, a gear ring plate, an impeller ring plate with filter holes, and blades, forming a multi-bucket structure. The sedimentation zone has an inclined overflow trough with overflow ports on the side walls. This utility model integrates the motor and reducer within the electric drum, achieving direct impeller drive, reducing equipment size, improving sealing and resistance to harsh environments (muddy, humid), extending equipment life, and providing high transmission efficiency with energy-saving and noise-reducing effects. The zoned sedimentation allows useful fine sand to settle and prevent loss, reducing overflow trough blockage.