932results about How to "Solve environmental problems" patented technology

The invention discloses a scene generation system and method for autonomous vehicle measurement. The system comprises a testing content generation module, a testing site library, a testing site layoutmodule, and a testing route generation module. The testing content generation module is configured to acquire testing demands and generating corresponding testing contents according to the testing demands; the testing site library is configured to store characteristic information of testing sites; the testing site layout module is configured to selecting the testing site matched with the testingcontents according to the characteristic information of the testing sites, and generating and outputting testing layout parameters of the testing site; the testing route generation module is configured to generate and output corresponding testing route data according to the testing contents and the testing site selected by the testing site layout module. According to the scene generation system and method for autonomous vehicle measurement, corresponding measurement scenes can be generated and provided for testing of autonomous vehicles according to actual testing demands.

The invention relates to a wireless image transmission communication system for an unmanned aerial vehicle and a wireless image transmission communication method. The wireless image transmission communication system comprises a digital camera, a control module and a power module, and is characterized in that the wireless image transmission communication system further comprises a wireless communication module for real-time data transmission with a ground monitoring center, the wireless communication module comprises a reconfigurable high-speed digital modulation unit and a digital transmission transmitter, the reconfigurable high-speed digital modulation unit is used for selecting a digital modulation mode to digitally modulate serial data stream according to the modulation mode of a remote control command of the ground monitoring center, the digital transmission transmitter is used for transmitting data by the aid of microwaves, and the reconfigurable high-speed digital modulation unit comprises a series-to-parallel portion, a sampling control portion and a carrier wave multiplication portion. By adding the reconfigurable multi-mode modulator, modulation modes can be changed in an online manner according to the quality of a signal channel environment, and high-resolution image data can be transmitted in real time even in a severe transmission environment.

The present invention discloses a preparation method of graphitized carbon nano material which relates to a preparation method of carbon nano material. Problems like high cost and environment pollution in existing graphitized carbon nano material process are solved through the invention. The method is as following: 1. pretreatment of carbon source; 2. energizing agent in solvent and carbon source after pretreatment; 3. pre-carbonization; 4. heat treating; 5. acid treatment; 6. physical activation or chemical activation. The invention has features like simple process, little pollution to environment, low cost, simple equipment and easy commercialization.

The invention discloses a resource utilization type steel-slag concrete. The resource utilization type steel-slag concrete is characterized in that the volume weight is 2400 -2600kg/m3, and the raw material components and the weight part of each component based on the mass percentage of cement are as follows: 1.000 parts of cement, 0.300-0.350 parts of mineral powder, 0.350-0.400 parts of coal ash, 0.100-0.150 parts of steel-slag fine powder, 1.300-1.650 parts of steel-slag fine aggregate, 1.400-1.900 parts of steel-slag rough aggregate, 2.000-2.200 parts of sand, 3.200-3.450 parts of broken stone, 0.700-0.900 parts of water, and 0.015-0.025 parts of additive. In comparison with the normal concrete, the resource utilization type steel-slag concrete provided by the invention has the advantages that the total content of solid wastes such as steel-slag and coal ash is higher than 30%; with the adoption of the industrial solid slag, the additional value is enhanced, the production cost is reduced, and meanwhile, the environmental problem is solved; the prepared concrete has good compactness and excellent mechanical property.

The invention discloses a formation method of two-color or multi-color jacquard warp knitting cloth. The warp knitting cloth is knitted on a jacquard warp knitting machine. The formation method comprises the following steps that (1) jacquard patterns are designed by the adoption of a computer; (2) knitting is prepared; (3) parameters are input to the jacquard warp knitting machine, knitting is achieved through the machine, and the warp knitting cloth with preset patterns is obtained. The knitted warp knitting cloth can be of two colors or multiple colors, yarns in each color independently form jacquard and other patterns, the appearance is attractive, and the problems of cost and loss increasing, environmental protection, the physical property, quality and the like caused by the fact that the two colors or the multiple colors of the warp knitting cloth is obtained by the adoption of post processing are resolved. Meanwhile, more than seven yarn guide bars are adopted to knit, the formed warp knitting cloth not only has the function of irregular pattern jacquard but also displays different colors of different patterns, patterns of a cloth cover of the warp knitting cloth are complex and changeable, the different colors are mutually combined to form the cloth cover with distinct levels and distinguished in flexibility.

The invention discloses a preparation method and application of a cadmium sulfide/graphite like carbon nitride (CdS/g-C3N4) composite visible light catalyst. The preparation method of the catalyst is a chemical precipitation method which is performed in an alkaline environment, wherein g-C3N4 is taken as a matrix, and CdCl2 and Na2S are taken as raw materials. The weight ratio of CdS to g-C3N4 in CdS/g-C3N4 is (1:2)-(5:1), and when the composite visible light catalyst is used for visible light catalysis treatment of methylene blue and methyl violet solutions, a better degradation effect can be obtained; and furthermore, the catalyst can still keep higher catalytic activity after being reused for five times. The composite visible light catalyst disclosed by the invention has important significance for development of the visible light catalyst, and also has good application prospects in treatment of dye wastewater.

The invention provides a preparation method of a lightweight water-resistant paperbacked gypsum board. The preparation method at least comprises the following steps of (a) scattering desulfurized gypsum, and carrying out stir-frying to obtain calcined gypsum powder; (b) sufficiently mixing coal ash and the calcined gypsum powder, grinding and modifying to obtain clinker; (c) mixing water, a foaming agent, hydrogenated silicon oil, modified starch, STMP powder and paper fibers into the clinker, and sufficiently stirring to obtain uniform slurry; (d) continuously pouring the slurry between two layers of surface protective paper, and carrying out extrusion molding to obtain a wet gypsum board; and (e) solidifying the wet gypsum board, cutting off, drying, and sawing edges to obtain a finished product of the paperbacked gypsum board. The preparation method has the advantages that the aim of comprehensively utilizing resources is achieved, and the prospects of low carbon, energy saving and environment protection of a novel building material are realized. The weight of the unit area of a water-resistant board is reduced, the production cost is reduced, and the water resistance and strength of the board are improved.

The invention provides an indoor positioning method for a mobile robot based on multi-sensor fusion. The milemeter position data based on track plotting is adopted for compensating for an unrecognized similar environment in laser matching positioning. According to the invention, the sensor positioning data based on an inertia unit and a milemeter is fused, and the laser radar matching positioning is also considered as a reference index, so that the accumulative error of the milemeter is reduced, and the defect that a short-distance laser radar cannot be matched and positioned under a single characteristic environment is overcome, so that more accurate positioning data can be supplied for map drawing and navigation of the robot.

The present invention provides an olefin resin and olefin thermoplastic elastic body high fire-resisting foamed body and its production method. Its composition includes (by weight portion) 10-100 portions of halogenless fire-resisting body, 100 portions of base body resin, 10-30 portions of foaming agent, 0.1-1 portion of cross-linking agent or radiation 20-60KGy. Its production method is characterized by that it adopts expanded type fire-resisting system of non-halogen series fire-resisting system and makes it recompounded with other non-halogen series fire-resisting agent so as to raise fire-resisting property of foamed body.

The invention provides an anchor rod drill truck. The anchor rod drill truck includes a machine frame body, a frequency conversion speed regulation walking mechanism, an electrical control system, a hydraulic system, a directional cruise control and step distance measurement system, front and rear stabilizing devices and an anchor drill system. The anchor drill system comprises a telescopic working arm, a drilling frame, a laying net and temporary support mechanism and an automatic catridge jetting system. The frequency conversion speed regulation walking mechanism is installed on a chassis ofthe anchor rod drill truck, the telescopic working arm is connected with the machine frame body in a pinned mode, and the drilling frame is connected with the front end of the telescopic working armthrough a rotating hydraulic device of the telescopic working arm. The hydraulic system and the rotating hydraulic device are arranged correspondingly, and the directional cruise control and step distance measurement system and the variable frequency speed regulating walking mechanism are arranged correspondingly. The front and rear stabilizing devices are arranged at the front and rear ends of the machine frame body separately. The anchor rod drill truck solves the technical problems that in the prior art, installation of an anchor, disassembly and assembly of a drilling rod and catridge workare carried out manually so that physical consumption of operators is large, and the operators are threatened by dust environment and roof collapse which is prone to being occurring in roof areas.

The invention provides a coal combustion apparatus capable of separating carbon dioxide, which is mainly formed by connecting a fuel reactor, a primary cyclone separator, a dipleg and an air reactor in series; wherein the lower part of the fuel reactor is provided with a mixing chamber with large cross section, and the upper part thereof is provided with a lifting tube with small cross section; and the height of the lifting tube is over three times higher than that of the mixing chamber. The invention also provides a method using the coal combustion apparatus capable of separating the carbon dioxide to separate the carbon dioxide. The fuel reactor adopts the structure of a reactor with long residence time, internal circulation can be formed by granules, and the gas-solid turbulence is improved; the air reactor adopts a moving fluidized bed to ensure the operation to be stable, so that the heat can be evenly released; meanwhile, a heat exchanger is arranged inside the bed, so that coking caused by local overheating since a great deal of heat is released in a centralized way in oxidation reaction can be avoided. Furthermore, the fuel reactor and the air reactor run under the pressure, so that the equipment can be compact, the utilization efficiency of system energy is high, and the subsequent carbon dioxide compression energy consumption is reduced.

The invention discloses a production method for an organic fertilizer. The production method can be used for mixing excrements of herbivore animals and plasters or plant ashes and coal ashes which are obtained by combusting lime sludge of a sugar factory or manioc waste and bagasse of a starch factory and quickly converting organic waste into available organic fertilizers by a zymophyte ecological method. According to the method provided by the invention, the stack fertilizer preparing time can be shortened, and the labor and the time can be saved. By using the organic fertilizer produced by the method, a perfect root environment can be constructed, so that rot diseases can be avoided; plants can fully realize the functions of absorbing the fertilizers, and crops can quickly grow up; the physical property and the chemical property as well as the microbial state of the soil are thoroughly balanced, so that the soil can be forever kept in an optical state for culturing crops. The organic fertilizer produced by the invention can be mixed with other trace elements, a plant growth promoter, chemical fertilizers and the like to prepare a composite fertilizer. Beneficial microflora can be added for further treatment; the non-toxic and harmless microorganism fertilizer can be compounded.

The invention relates to a ceramic product prepared from waste ceramic and a preparation method thereof. The blank formula of the ceramic product comprises the following components in part by weight: 32-36 parts of waste ceramic powder, 25-28 parts of kaolin, 15-22 parts of plastic clay and 17-25 parts of feldspar. The basic glaze formula of the ceramic product comprises the following components in part by weight: 30-35 parts of miniumite, 8-12 parts of limestone, 20-30 parts of feldspar, 8-14 parts of clay and 20-25 parts of quartz. A right amount of coloring metal compounds and/or coloring materials are added into the basic glaze. Compared with the prior art, a large amount of waste ceramic powder is used for replacing the traditional ceramic raw material for the basic glaze formula, and the technological difficulties of waste ceramic powder compounding, grain composition, sintering, decoration and the like are overcome. Not only is the waste changed into the valuable and a large amount of waste ceramic products are fully utilized, but also the sintering temperature of the ceramic product can be lowered, the energy consumption is reduced, the production cost of ceramic manufacturers is lowered, and the market competitiveness of the product is increased.

The invention relates to recycled green concrete with low cement content. The recycled green concrete is the concrete prepared through reclaimed sand and recycled stone instead of natural sand and stone, and recycled micro powder, slag and limestone powder instead of most of the cement, wherein the reclaimed sand and recycled stone are obtained by treating construction wastes taking waste concrete as major by cleaning, crushing, grading and mixing in a certain proportion.

The invention discloses a method for preparing a rice hull active carbon/silicon dioxide/titanium dioxide composite material in the technical field of preparation of nano titanium dioxide photocatalysts. The method comprises the following steps of: carrying out acid cleaning on rice hull powder; adding an NaOH solution into the rice hull powder which is subjected to acid cleaning and carrying out alkali cooking to obtain mixed size consisting of rice hulls and sodium silicate; preparing a rice hull/silicon dioxide/titanium dioxide precursor; and finally carrying out carbonization and activating treatment to prepare the rice hull active carbon/silicon dioxide/titanium dioxide composite material. The rice hulls and nano titanium dioxide are combined in a chemical bond mode by silicon dioxide. The rice hull active carbon/silicon dioxide/titanium dioxide composite material not only has excellent adsorption performance of rice hull active carbon, but also has excellent photocatalysis performance of the nano titanium dioxide. The problem that the nano titanium dioxide is easy to fall off on the surface of a vector is effectively avoided. The stability of the composite material is greatly improved. The method has the advantages of simple preparation process, low price of raw materials, low cost and low pollution.

The invention discloses a method for manufacturing plastic parts or covering parts, which comprises the two parts of sheet material plastic-absorption molding and reaction injection molding, wherein, the sheet material plastic-absorption molding includes that plastic-absorption molding is carried out on acrylonitrile-butadiene-styrene/acrylic coating exemption sheet material, polypropylene sheet material, polyvinyl chloride sheet material, poly carbon ester sheet material, polythene sheet material, nylon sheet material or acrylonitrile-butadiene-styrene sheet material for manufacturing the finished plastic-absorption products; the reaction injection molding includes that the mixed reactant of polyurethane and glass fibre bunch is poured on the internal surface of the finished plastic-absorption products, the dies are assembled, after complete reaction, the plastic part or covering part used on vehicles is manufactured. The method has the advantages of being suitable for mass production and low harm to environment and human body.

The invention relates to a coal gangue and soil layer combination based multilayer structure filling reclamation method, comprising the following implementation steps of: a, measuring and calculating the area, the average depth and the maximum depth of a to-be-reclaimed area, on the basis, further estimating the filling elevation and the filling thickness of the to-be-reclaimed area and calculating the porosities of two to-be-filled coal gangues with different particle sizes; b, filling the coal gangue with the larger diameter in the two to-be-filled coal gangues into the bottommost layer of the to-be-reclaimed area; c, covering a clay layer on the first coal gangue layer and rolling to be level; d, covering the coal gangue with the smaller diameter in the two to-be-filled coal gangues on the clay layer, and tamping in layers; and e, covering surface soil on the second coal gangue layer and rolling to be level. By using the method provided by the invention, not only can the reclamation of a coal gangue filling sinking area be realized, but also the problem of poor water retention, soil moisture conservation and fertilizer conservation performances can be solved and the economic benefits of land products can be restored to the maximum extent.

The invention provides a method for recycling waste concrete, which comprises four steps of vibration screening, reshaping treatment, grinding treatment and mixing compounding. The method can reasonably solve the problem of the reutilization of the waste concrete; on the one hand, the problems of difficult treatment on a large amount of discarded waste concrete, adverse influence on the environment caused by the difficult treatment of a large amount of discarded waste concrete and the like are solved, so that the huge cost of transporting and treating wastes is saved; and on the other hand, the exploitation of natural sandstone is reduced, so that the method protects ecological environment and facilitates the sustainable development of human society.

The invention discloses a desk capable of regulating desktop space. The desk comprises a desktop supported by a desk leg, a window is arranged on the desktop, a support is installed at the bottom of the desktop, a lifting plate corresponding to the window is installed on the support through a driving mechanism, and a lifting button for controlling the driving mechanism to drive the lifting plate to performing lifting towards the window is installed on the desk leg or the desktop. A baffle plate fastened together with the window is hinged to the window or the upper end of the support, a supporting rod capable of supporting the baffle plate when articles on the lifting plate rise to the window is installed on the driving mechanism, the driving mechanism comprises a vertical screw which is driven by a motor to rotate, the screw is connected with a nut in threaded mode, the driving mechanism comprises a sliding rod which is arranged parallel to the screw, a sliding sleeve is slidably sleeved on the sliding rod, the sliding sleeve and the nut are fixedly connected together through a beam, and the lifting plate is installed on the beam. The desk capable of regulating the desktop space can facilitate office, can transfer large office equipment so as to be suitable for meetings or visitor receiving occasions, can recover office states rapidly, and can be applied to various offices.

The invention relates to a liquid fertilizer used for eggplant based on biogas slurry and its application method, which comprises the following steps by weight: 70-90 parts of biogas slurry, 10-15 parts of ammonium nitrate, 3-5 parts of dipotassium hydrogen phosphate, 5-8 parts of potassium chloride, 1-3 parts of calcium nitrate, 0.8-1.5 parts of ferrous sulphate, 0.5-0.8 parts of magnesium chloride, 0.2-0.5 parts of zinc sulfate, 0.5-1.5 parts of boric acid, 0.3-0.5 parts of manganese sulfate and 0.2-0.5 parts of ammonium molybdate. According to the invention, the biogas slurry which is obtained by anaerobic fermentation of livestock and poultry excrement and crop straw through a methane tank, the nutrient composition required by the growth of the eggplant can be scientifically added to prepare the liquid fertilizer. The liquid fertilizer has the advantages of comprehensive nutrition, sufficient raw material source, low cost and safe environmental protection. The liquid fertilizer is diluted by using clear water, and is taken as an eggplant foliar fertilizer for spraying or a nutrient solution for soilless culture, and can obviously improve the growth property of the eggplant, the incidence of disease is reduced, and the output is increased to more than 14%. The liquid fertilizer solves the problems of difficult application, difficult transportation and environmental pollution due to secondary discharge.

The invention provides a burn-free coal-ash-based geological polymer high performance adsorbing material preparation method which comprises the following steps: a, preprocessing a solid raw material; b, preparing a base material, wherein solid waste coal ash containing rich aluminosilicate is utilized as the solid raw material, an alkali activator is utilized as a liquid raw material, and the solid raw material and the liquid raw material are evenly mixed to react at a temperature of 20 to 100 DEG C to form a base; c, forming a base material, i.e., forming the evenly-mixed solid and liquid raw materials into a base sample through granulation molding or casting molding or extrusion molding; d, maintaining the base sample; e, washing and drying. The method can save energy, is simple in preparation technology, can reduce production cost, can be used to produce a high performance geological polymer adsorbing material in a large scale, and the waste coal ash of coal-fired power plants is utilized as a raw material to prepare the adsorbing material at a room temperature; thus, the problem of coal ash stack and waste and the environmental problems caused by the coal ash stack and waste are solved, and industrial organic waste gas and waste water containing phenol can be treated in a mode of using waste to treat waste.

The invention relates to a hot-melt adhesive for the bonding layer of artificial leather and a preparation method as well as application thereof. The preparation method comprises the following steps of: firstly reacting low polymer polyalcohol, an expoxy resin and aromatic polyhydroxy special polyether with diisocyanate, then adding a hydrophilic chain extender and a micromolecule polyalcohol chain extender for carrying out chain extension reaction to obtain an intermediate product, neutralizing by using organic amine, emulsifying by using water to generate a polyurethane emulsion, finally removing an organic solvent at a reduced pressure to obtain a waterborne polyurethane emulsion, adding a special organic silicon surface active agent, a FeCl3 aqueous solution, a waterborne curing agent, natural rubber, chloroprene rubber, nitrile butadiene rubber and a thickening agent, and preparing the hot-melt adhesive for the bonding layer of artificial leather. The bonding layer of artificial leather is used for compositing spinning fabrics and PVC (Polyvinyl Chloride)/cloth in the fields of bags, suitcases and clothing. The prepared adhesive has the excellent performances of firm bonding strength, water resistance, acid resistance, alkali resistance and the like and is applied to the artificial leather fields of clothing, bags, suitcases and the like.

The invention relates to a package structure of a high-temperature pressure sensor, comprising a silicon carbide sensitive chip, an aluminum nitride base, a stress buffer substrate, a high-temperature sealing glass, a lead post, a Kovar outer cover and a thermocouple, wherein the aluminum nitride base is There is a boss on the surface, a stress buffer substrate is placed on the boss, and a silicon carbide sensitive chip is placed on the stress buffer substrate; the periphery of the boss is a stress isolation groove, and there are two or more through holes on the periphery of the stress isolation groove. The column passes through the through hole and is sintered by high-temperature sealing glass to realize the fixed connection between the lead column and the aluminum nitride base. The thermocouple is installed on the lower surface of the aluminum nitride base, and the aluminum nitride base is placed on the Kovar housing through the positioning steps. In addition, the aluminum nitride base and the Kovar cover are sintered and connected through high-temperature sealing glass. The packaging structure is resistant to high temperature, effectively reduces the influence of process stress and high temperature thermal stress on the sensitive chip of the MEMS pressure sensor, and further improves the high temperature measurement accuracy of the sensor.

The invention relates to the technical field of condiment production with biological enzyme method, especially relating to a production technology for producing nutrient seasoning powder by enzymatic method with comprehensive utilization of avian skeleton. The production technology includes the following steps: (a) preparing raw materials; (b) performing cooking process; (c) performing a first step of enzymolysis reaction; (d) performing a second step of enzymolysis reaction; (e) performing Maillard reaction; (f) performing homogenizing treatment; and (g) performing powder spraying treatment: subjecting the mixture after homogenizing treatment to powder spraying treatment in a spray tower, sieving to remove the residues with a sieve mesh, and uniformly stirring to obtain the nutrient seasoning powder. The invention uses new biological enzyme to perform enzymolysis and extraction to the nutrients in the avian skeleton completely, so that the prepared condiment has rich nutrition, rich aroma, good quality, pure natural taste, and high product yield.

The invention discloses a heavy metal polluted soil repairing agent with a high content of biocarbon and humus, and an application method thereof. The repairing agent is composed one or more of kitchen garbage, blue algae, livestock and poultry manure, straw, wood chip, rice husk, plant wastes, dead animal due to diseases and residual body of livestock and poultry. The raw materials mentioned above is subjected to steps of impurity removing, grinding, and proportioning, and then the mixture is subjected to a sub-critical water treatment for 90 to 150 minutes at a temperature of 180 to 360 DEG C under a pressure of 1.8 to 5.8 MPa so as to obtain the tail product; wherein the biocarbon content accounts for not less than 45% of the dry substrate, the total nutrient content is 4 to 6%, the amino acid content is not less than 20%, the humus content is not less than 40%, the trace element content is not less than 0.5%, and the pH value of the repairing agent is 5 to 7. The provided repairing agent can be used to repair polluted soil, and can also be used to treat the soil secondary salinization and hardened soil caused by over application of chemical fertilizer and pesticides. The organic solid waste pollutants are processed to produce the repairing agent, thus the environment pollution problem is solved, and at the same time, the biocarbon and humus in the tail product can repair and improve the soil polluted by metals, chemical fertilizers, and pesticides.

The invention discloses betel nut chewing gum and a preparation method. The preparation method utilizes betel nut biotin and a chewing gum base as main raw material and also may utilize a proper amount of auxiliary ingredients according to demands. The preparation method comprises the following steps of sorting fresh betel nuts, carrying out cleaning, carrying out fragmentation, adding water into the fragmented betel nuts, adding 0.1-1% of cellulase into the mixture for biological pyrolysis, adjusting a pH value to 2-7, carrying out standing for 0.5-4h, carrying out plate filtration to obtain extract, carrying out high-speed centrifugation at a rate of 3000-20000rmin to obtain a solution, carrying out vacuum continuous dehydration on the solution at a temperature below 60 DEG C to obtain solids, crushing the solids into powder of 30-120 meshes, carrying out examination to obtain a powdery betel nut biotin, and adding the powdery betel nut biotin into the chewing gum base to obtain the betel nut chewing gum. The betel nut chewing gum retains active components of fresh betel nut, has a fresh betel nut chewing taste, causes a transitory intoxication feel and skin fever and redness, and avoids mucous membrane damage and environment problem caused by betel nuts.

The invention discloses a unified monitor architecture and method of a distributed data center. The architecture comprises the following nodes: a service registration module, a service providing module, a service consumption module, and a service running container, wherein the service registration module is used for service management, and the service management comprises at least one of the followings: service registration, service subscription, service information notification and service monitor; the service providing module is used for providing services and performing service registration through the service registration module; the service consumption module is used for subscribing services from the service registration module; and the service running container is used for providing at least one of the following functions: starting the service providing module, loading the service providing module, and running the service providing module. Compared with the prior art, the unified monitor architecture and method of the distributed data center facilitate unified management of the distributed data center, solve problems of performance of an original centralized system and distributed environment management, and have high practicability.

This invention relates to a method for preparing a fire retardant agent for natural brucite Mg(OH)2 cables including: selecting sheet-like natural brucite, 2, pre-processing the natural brucite, 3, getting superfine micro-particles of Mg(OH)2 after entering into the gas flow to be collided, crushed and magnetized, 4, putting the micro-particles into a modifying machine, then dropping or spraying the magnetized modifier into the modifying machine to get the fire retardant agent of Mg(OH)2 of natural brucite.

The invention discloses a technology for producing potassium chloride from carnallite. The technology comprises the following steps: determining a critical particle diameter of particles with the mostaverage content of the potassium chloride and selecting a standard screen mesh for sieving carnallite particles; sieving the carnallite particles into a primary oversize material and a primary undersize material by utilizing the standard screen mesh; adding a water amount for completely dissolving magnesium chloride into the primary oversize material to obtain a primary dissolving solution and primary mixed slurry; sieving the primary mixed slurry into a secondary oversize material and a secondary undersize material by utilizing the standard screen mesh; carrying out reverse flotation to obtain low-sodium carnallite and tail salt foam; adding the water amount for completely dissolving the magnesium chloride into the low-sodium carnallite to obtain a secondary dissolving solution and secondary mixed slurry; carrying out solid-liquid separation on the secondary undersize material and the secondary mixed slurry to obtain a crude potassium product; washing an obtained potassium chloride crude product to obtain a qualified potassium chloride finished product. The technology disclosed by the invention has the advantages of simplicity in operation, less investment, low energy consumptionand high yield and the quality of the prepared potassium chloride finished product is good.

The invention relates to a large-structure sublevel drilling stage ore removal mining method with delayed filling. The mining method comprises stoping in stopes and bottom structure recovery which are carried out synchronously in a crossed manner, and comprises the following steps: step 1, stoping in odd-numbered stopes, wherein the stoping manner is sublevel drilling stage ore removal, and mined out space I is not filled immediately; step 2, stoping in 1/2 bottom structures I corresponding to the odd-numbered stopes, and filling ore rooms and the mined out space I, corresponding to the 1/2 bottom structures I, of the ore rooms after stoping is finished; step 3, stoping in even-numbered stopes, wherein mined out space II is not filled immediately; step 4, stoping in 1/2 bottom structures II corresponding to ore pillars, and filling the ore pillars and the mined out space II, corresponding to the 1/2 bottom structures II, of the ore pillars after stoping is finished. The mining method has the advantages that the mining-cutting work amount is reduced greatly; the production capacity of a single stope is high; the efficiency is high; workers' labor intensity is low; production, dispatching and management are simple. Moreover, stoping of the main ore in a stope and recovery of ore in the bottom structure of the stope are realized synchronously in a crossed manner, and the stoping operation is safe, so that the resource recovery rate is high.