74results about How to "Lower recovery costs" patented technology

The invention provides a matrix material and restoration method for ecological restoration of a gangue dump of a mining area. The matrix material consists of two parts, i.e., a seed germination layer and a root inducing layer and is mainly prepared from loam, acidified coal gangue, inorganic nonmetallic minerals, plant fibers, a water retention agent, an agglomerating agent, a disinfectant, a compound fertilizer, a seed mixture and the like. The matrix material has the characteristics of water retention, fertilizer retention, good stability, erosion resistance, easiness in plant establishment and the like; and by using wastes such as the coal gangue as main matrix materials, the consumption of imported soil can be effectively lowered, the soil environment of abandoned mines is improved, the environmental pollution is reduced, and the ecological restoration cost is reduced.

The invention discloses a method for preparing graphene by a low-temperature chemical reduction method, which belongs to the technical field of chemical composition of graphene. In the method, graphene oxide prepared by chemical oxidation is used as a raw material. The method comprises the reduction reaction step of reducing the graphene oxide into graphene; in the reduction reaction step, aluminum iodide is used as a reducer; the reduction of the graphene oxide is realized by controlling the concentration of the reducer and a solvent type at 60 DEG C to 180 DEG C; oxygen-containing functional groups (epoxy group, hydroxyl group, carboxyl group and carbonyl group) on the graphene oxide are removed; the electric conductivity of the graphene is recovered more thoroughly; and the graphene isprepared. The method provided by the invention is a method for preparing the graphene by a low-temperature chemical method, which is suitable for large-scale industrial production. The method has theadvantages of low reduction temperature, mild and controllable reaction, more thorough reduction, environmental-friendly performance, suitability to industrial production, etc.

The invention provides a method for preparing ferronickel by using red mud and laterite-nickel ore. Meanwhile, a novel method is provided for recovery of iron in red mud and production of ferronickel from the red mud and the laterite-nickel ore. According to the method, iron-nickel reduction products in the red mud and the laterite-nickel ore are directly utilized, and low-cost ferronickel can be provided for stainless steel smelting production, ferroalloy casting and alloy steel production. The laterite-nickel ore also contains a little of chromium, and in the production method disclosed by the invention, chromium enters the iron-nickel alloy, so that beneficial chemical components of the iron-nickel alloy are enriched. The contained iron-nickel alloy produced by the method disclosed by the invention is iron-nickel alloy with low P and S content.

The invention provides a convenient lost article recovering system, which comprises a lost article storage box, a lost article query system, and a lost article recovering service website, wherein the lost article storage box is used for storing a lost article picked up by a finder and capable of being stored; and the lost article query system comprises a network control center, a lost article query network, and a mobile phone platform, a computer and a system service terminal connected with the network control center. The invention also provides a convenient lost article recovering method, which comprises steps: the finder processes and reports the lost article; and the owner reports the lost article, queries the lost article and gets the lost article. When an article is lost or picked up, the finder or the owner enters the lost article query network by using a mobile phone or a computer to report the lost article or look for the lost article. After the lost article is queried, lost article getting information is submitted to the system service terminal, and the lost article can be got at a corresponding lost article recovering service website. The system and the method of the invention have the beneficial effects of multiple lost article query modes, good flexibility, high accuracy, simple operation, strong practicability and facilitated promotion.

The invention discloses a method for controlling lake eutrophication by regulating and controlling submerged plant growth through water depth. The method mainly comprises five steps, namely selecting a critical time point to plant submerged plants, selecting a critical time point to regulate and control the water depth and regulating the planting density of the submerged plants to enable the submerged plants to obtain the maximum biomass and provide such environmental conditions as optimal illumination, water temperature and the like, so as to control eutrophic water bodies more effectively. The method disclosed by the invention is convenient to implement and operate, low in submerged plant colony recover cost, capable of saving manpower and material resources, low in subsequent maintenance cost, high in plant survival rate and good in purification effect.

The invention relates to a borrowing and loan matchmaking system and method capable of realizing risk control based on network platform moments credit extension. The borrowing and loan matchmaking system capable of realizing risk control based on network platform moments credit extension comprises a user registration module, a user audit risk control module, a borrowing issuance module, a borrowing and loan matchmaking module and a dynamic credit extension module. The beneficial effects are as follows: before loaning, the matchmaking system can fast, reliably and economically assess risks by means of multiple dimensions of the moments as friends are generally regarded as a group knowing the individual credit situations of a borrowing user best; once breach of contract, the moments maintained by the network platform can put social pressure on the borrowing user to push the user to complete repayment based on the information of network-associated users and a guarantor, so as to reduce the loss of the investors and the recovery cost; the credit grade of the borrowing user is dynamically and accurately monitored in real time based on the credit line change of the moments credit extension; and the dynamic credit big data (dynamic credit information system) is finally formed.

The invention relates to a low-cost preparation method of a high-strength refractory anti-seismic steel bar, and further discloses the high-strength refractory anti-seismic steel bar. The low-cost preparation method comprises the steps that 1, laterite nickel ore, marine placer and pulverized coal are dried, crushed, levigated and screened to obtain mixed particles; 2, a fusing agent of slaked lime and an additive of syrup are added into the mixed particles to obtain a to-be-reacted material; 3, the to-be-reacted material is subjected to ball pressing treatment to obtain a pellet; 4, the pellet is subjected to direct reduction-magnetic separation or smelting separation treatment to obtain an alloy; and 5, the alloy and ferromolybdenum or ferrocolumbium are added into molten steel, and LF refining, continuous casting and rolling are conducted to obtain the high-strength refractory anti-seismic steel bar. According to the low-cost preparation method of the high-strength refractory anti-seismic steel bar and the high-strength refractory anti-seismic steel bar, compared with separate use of the laterite nickel ore or the marine placer or copper slag, the reduction cost is greatly reduced, and an obtained nickel chromium vanadium titanium copper iron alloy can be directly used for low-cost production of the high-strength refractory steel bar; and the laterite nickel ore, the marineplacer and the copper slag are reasonably utilized, and energy saving and emission reducing are facilitated.

The invention relates to the field of steel slag and red mud solid waste treatment, in particular to a steel slag and red mud component recycling iron and resource recycling technology and application. The technology mainly includes the following steps that red mud B is added into steel slag A, uniform mixing is conducted, a mixture C is obtained, the mixture C is heated to 1200 DEG C-1600 DEG C,a reducing agent D is added into the mixture C, and after the reducing agent D is sufficiently reacted with the mixture C, molten iron E is separated from molten slag F. The molten slag F is subjectedto subsequent treatment, then petroleum fracture ceramsite sand, cement, glass and the like are prepared. The steel slag A can be steel mill molten steel slag or steel slag smashed after cooling. Thered mud is Bayer process red mud. The main components of the reducing agent are carbon and silicon dioxide and are preferably materials such as carbonized rice husks and gangue comprising carbon andsilicon at the same time. The mass ratio of the steel slag and the red mud is 5:95-95:5. The technology is simple and is a resource modification regeneration green short-process technology, and comprehensive utilization of red mud and steel slag resources is sufficiently achieved.

The invention discloses an assembly type concrete slotting shear wall which comprises frame beams, frame columns and at least one concrete prefabricated panel; the two frame beams are arranged in a spaced manner in an up-and-down manner, the two frame columns are arranged on the two sides of the frame beams, and the two ends of each frame column are connected with the frame beams located at the upper portion and the lower portion; the concrete prefabricated panel is arranged between the two frame beams and are connected with the frame beams, the two frame columns are located on the two sides of the concrete prefabricated panel, and a plurality of first damping seams arranged at intervals are formed in the concrete prefabricated panel; and each first damping seam is through in the thickness direction of the concrete prefabricated panel. According to the assembly type concrete slotting shear wall in the embodiment, the first damping seams are arranged on the concrete prefabricated panel, the wall is divided into a plurality of wall limbs with the higher depth-width ratio, the wall deforms during earthquakes, the first damping seams deform along with deformation of the wall, and therefore the non-deformability and the ductility of a building are strengthened.

The present invention discloses an electric vehicle product antitheft management system based on a two-dimension code. The system comprises the following steps that manufacturers mark a set of unique two-dimension codes on each electric vehicle when the electric vehicles leave the factories, consumers scan the two-dimension codes on the electric vehicles by the two-dimension code scanning ends of the intelligent mobile phones when purchasing the electric vehicles and then write the electric vehicle current purchase relevant information, the relevant information is submitted to an antitheft system background cloud server after being written by the consumers, and the cloud server analyzes the information and binds the correlation relation among the consumers, the electric vehicles and the two-dimension codes. According to the present invention, the only and corresponding two-dimension code is generated for each electric vehicle, thereby realizing the electric vehicle antitheft management and control, being convenient to use, improving the tracking and capturing efficiency of the stolen vehicles, at the same time, reducing the troubles of the consumers and the tracking and capturing cost of the stolen vehicles.

The invention discloses a blockchain data recovery method and device, equipment and a medium. The method comprises the steps of obtaining a to-be-rolled-back height, acquiring hash values of all corresponding root nodes to be rolled back based on the height of the root nodes to be rolled back; based on the hash value of the root node to be rolled back, obtaining to-be-rolled-back root node data corresponding to each to-be-rolled-back root node hash value from a database, generating an MPT tree to be rolled back; updating the MPT tree to be rolled back into a memory; replacing an account book MPT tree in a memory with the MPT tree to be rolled back; based on the MPT tree to be rolled back, rolling back the account book state of the blockchain to a corresponding to-be-rolled-back height; deleting the block data after the to-be-rolled-back height in the original to-be-recovered blockchain; obtaining normal block data from the synchronized blockchain node based on the height to be rolled back; and recovering the block data after the to-be-rolled-back height in the original to-be-recovered blockchain, obtaining correct root node data based on the normal block data, and recovering the to-be-rolled-back MPT tree, so as to improve the data recovery speed in the blockchain and reduce the data recovery cost.

The invention provides a multiwalled carbon nanotube (MCNTs)-supported platinum grease hydrogenation catalyst, belongs to the field of catalysts, and relates to a platinum catalyst loaded on the MCNTs. The catalyst is formed by the active component platinum loaded on the MCNTs, the actual loading amount of platinum is 1.73% (the carrier weight is used as the benchmark), the specific surface area of the catalyst is 412.12 m<2>g<-1>, the specific pore volume is 0.462 cm<3>g<-1>, the average pore diameter is 4.48436 nanometer, and the platinum particle diameter ranges from 2.5 nanometers to 5.5 nanometers. According to the platinum grease hydrogenation catalyst provided by the invention, the preparation technology is classic and simple, the carrier material is novel, and the catalytic activity of the hydrogenated soybean oil is extremely high; moreover, compared with the industrial nickel catalyst, the catalyst provided by the invention has the advantages that less trans fatty acids are generated, the selectivity is good, the quality of the hydrogenated oil is good, and the hydrogenation effect is excellent.

The invention relates to a deoxidation and restoration method for smelting stainless steel in a converter. The method comprises the following steps of: (1) smelting stainless steel in a converter: blending dephosphorized molten iron in the converter, blowing in high-pressure oxygen and nitrogen in a flow ratio of 1 to (2.53-3.5) for decarburization and temperature rise, adding high-carbon chromium iron, high-carbon ferromanganese iron, steelmaking lime and caustic-burned dolomite to the converter in batch from a storage bin at the top of the converter, wherein the dephosphorized molten iron contains the following components in percentage by weight: 3.0-4.0 percent of C, not more than 0.1 percent of Si and not more than 0.025 percent of P, the molten iron contains 0.20-0.40 percent of carbon, and the contents of chromium and nickel reach a control range of a corresponding steel grade; and (2) restoring: calculating the amount of needed pure silicon to be added, converting into the amount of silicon carbide, adding fluorite, flushing nitrogen, stirring and restoring so that the amount of Cr2O3 in the converter is not more than 0.5 percent. The eoxidation and restoration method for smelting stainless steel in the converter can decrease the costs of the raw materials.

The invention provides a quarry muck spray-seeding medium and a spray-seeding method thereof. The spray-seeding medium comprises a medium layer and a seed layer, wherein the medium layer is located onthe bottom layer, and the seed layer is located on the upper layer of the medium layer. The medium layer is mainly prepared from, by mass, 50-60% of muck A, 5-10% of biochar, 10-15% of straw, 5-13% of cement, 1-3% of potassium sulphate, 1-2% of acrylamide and 10-15% of biogas slurry; the seed layer is mainly prepared from, by mass, 30-40% of muck B, 20-35% of sludge, 30-35% of biogas residues, 1-2% of starch grafted sodium polyacrylate, 1-2% of polyacrylamide and 1-2% of plant seeds. According to the spray-seeding medium, the quarry muck is used as the main raw material to replace soil used in an existing soil replacement spray-seeding technology, and the quarry muck spray-seeding medium has certain social, biological and economic values.

The invention provides a method for reducing iron tailings and enriching tail concentrate by taking steel slag as an additive and belongs to the technical field of comprehensive utilization of resources. The method for reducing iron tailings and enriching tail concentrate by taking steel slag as additives comprises the following main steps: drying and crushing the steel slag, taking the pre-enriched tail concentrate of the iron tailings as the raw material, taking the steel slag as an additive, adding a reducing agent, an adhesive and water to press balls and generate green pellets, putting the green pellets into a reduction atmosphere furnace to quickly reduce and prepare reduction pellets; naturally the reduction pellets, then crushing, grinding ore in two stages and carrying out two stages of magnetic separation to finally obtain reduction iron micro powder with a metallization ratio greater than or equal to 87%, an iron grade greater than or equal to 90% and an iron recovery ratio greater than or equal to 85%. According to the method, the steel slag discharged out of a steel plant is used as the additive, so that industrial or chemical pure additives such as calcium oxide and sodium carbonate are completely replaced; the reduction cost is remarkably reduced; the steel slag is used as the additive for reducing the iron tailings and enriching tail concentrate; the iron in the pre-enriched tail concentrate of the iron tailings can be recycled; the residual iron in the steel slag can be recycled; the economic benefit and social benefit are quite obvious.

The invention relates to a method for quickly recovering a degraded wetland by transplanting cattail seedlings, in particular to a method for quickly recovering the degraded wetland by using the transplanting of perennial cattail rhizomes. The method solves the problems of a cattail community such as slow seedling sprouting, root decomposition, high death rate and common poor adaptive capacity frequently appearing in a transplanting process. The method comprises the following steps: firstly, collecting; secondly, planting. The method improves the adaptive capacity of cattail species in a new resistance environment, so that seedlings can quickly root, a seedling survival process is quickly completed, the large-area outdoor degraded wetland can be recovered, and the survival rate can reach more than 85%. The method is used for restricting the degeneration of the cattail community.

The invention provides a task key system survival emergency recovery method based on quaternary nested restart, and is technically characterized in that the restart level grade of different granularities and the restart recovery policy of different levels in system are ensured; the calculation method of restart priority level is defined, the restart sequence of each restart level module in system is ensured, and recursive nested restart link is established; and the implementation process describing recursive restart emergency recovery is formalized by using SPN and DFA. The invention has the following advantages: facing different fault scenes, the restart object of different granularities can be efficiently selected and the restart sequence is ensured, thereby reducing the recovery time, reducing the recovery cost, and strengthening recoverable elasticity of task key system survivability. When the system survivability is degenerated to a certain degree, the internal state is cleared by stopping used continuous operation or restarting system, application service or process, thereby releasing operating system resources and recovering system survivability.

The invention discloses a concrete aggregate regeneration apparatus used for construction waste and construction waste residue treatment. The apparatus comprises a frame (1), a feeding hopper (2), crushing rollers (11), stripping rollers (12), a swing plate (9) and auxiliary facilities, and the swing plate (9), the crushing rollers (11) and the stripping rollers (12) are installed in the frame (1). The concrete aggregate regeneration apparatus is characterized in that the upper portion in the frame (1) is designed to be a crushing section, the lower portion in the frame (1) is designed to be a concrete (13) stripping section, the swing plate (9) is arranged over the crushing rollers (11), and a concrete aggregate separation section comprises two stripping rollers (12) having a same rotation direction. Regenerated concrete aggregates obtained in the invention are not physically damaged, have a complete structure, and are not different from new aggregates, so the apparatus multiplies the construction waste and construction waste residue reutilization rate, and has a far lower cost than aggregate heating reduction methods, thereby the added values of construction waste and construction waste residue recycling reduction are greatly improved, and circulative utilization is truly realized.

The invention discloses a method for preparing a graphene film through reduction of a ferrous iodide acid solution, belonging to the technical field of chemical synthesis of graphene. A graphene oxide prepared through chemical oxidation is taken as a raw material, and the method comprises a reduction reaction step of reducing the graphene oxide into graphene, wherein the ferrous iodide solution is taken as a reducing agent in the reduction reaction step, rapid reduction of the graphene oxide is realized by controlling the solution concentration, reduction time, reduction temperature, types and pH values of solvents and types of inorganic acids used for pH regulation, oxygen-containing functional groups such as epoxy group, hydroxyl, carboxyl and carbonyl on the graphene oxide are removed, the conductivity of the graphene is completely restored, and the graphene film is prepared. The method is a method for preparing graphene through a low-temperature chemical method suitable for large-scale industrial production. The method has the advantages of low reduction temperature, mild and controllable reactions, complete reduction, environment friendliness and suitableness for industrial production.

The invention belongs to the technical field of metallurgy, and particularly relates to a method for preparing ultrapure iron concentrate powder from a common grade iron mine. The method comprises the following steps: grinding and enriching the iron mine to obtain common grade iron miner powder in which TFe accounts for 58%-65%, then adding sodium hydroxide solution, mixing, performing desilicication reaction, washing with water, filtering, and drying to obtain ultrapure iron concentrate powder in which TFe accounts for 69.0%-71.5%. According to the method, low-cost available industrial sodium hydroxide replaces poor coking coal resources, so that the reduction cost of iron mine can be lowered, melting energy consumption can be reduced, carbon emission is reduced, and the energy-saving and environment-friendly purposes can be reduced; and the sodium hydroxide solution reacts with SiO2, silicon content in the iron mine is greatly reduced and the iron grade is improved.

The invention relates to a method for recovering metal platinum from industrial waste. The method comprises the following steps: metal platinum in industrial waste is purified by accumulation and placed in a reducing reactor with a stirrer in the (NH4)2PtCl6 form, then an HCl acidized solution is added, and after being heated to 30 to 70 DEG C and stirred, H2 is pumped for reducing, and (NH4)2PtCl6 is reduced into metal platinum which sinks onto the bottom of the reducing reactor, wherein the volume ratio of (NH4)2PtCl6 to the HCl acidized solution is 1:5 to 20. The method is simple, the reduction cost is low, the method is safe and reliable without pollution, and the yield rate and degree of purity of the metal platinum are high. The method is characterized in that hydrogen is taken as the reducing agent and (NH4)2PtCl6 after purification is reduced into metal platinum in liquid condition, and a small amount of base metal impurities included in solid (NH4)2PtCl6 is released in the solution, thus further increasing the purity of the metal platinum.

The invention discloses a method and system for processing zinc volatilization kiln slag. The method includes the steps that firstly, the zinc volatilization kiln slag is subjected to crushing treatment, so that kiln slag crushed materials can be obtained; secondly, the kiln slag crushed materials are subjected to drying treatment, so that crushed and dried materials can be obtained; thirdly, the crushed and dried materials are subjected to pelletizing, so that pellets can be obtained; and fourthly, the pellets, silica and calcium-series additives are supplied into a fuel gas melt separation furnace, so that smoke dust containing lead and zinc, molten iron and melt separation slag can be obtained. By means of the method, comprehensive recovery of iron, lead, zinc, silver and indium in the zinc volatilization kiln slag can be achieved, the iron recovery rate is higher than 92%, the lead recovery rate is higher than 96%, the zinc recovery rate is higher than 98%, the silver recovery rate is higher than 85%, and the indium recovery rate is higher than 85%.

The invention discloses a method for recycling Au from electronic components of a waste mobile phone. The method comprises the steps of (1) carrying out mechanical crushing on the electronic components of the waste mobile phone into 100 mesh or above; (2) separating non-metallic materials from Pd-containing metallic materials, and grinding the metallic materials into 100 mesh or above; (3) putting metal Au-containing powder into an HCl-CuCl2-NaClO-containging reactor with temperature control and mechanical stirring functions, and leaching Au to obtain an Au-containing solution; (4) carrying out Au extraction on the Au-containing solution through adopting a DBC-sulfonated kerosene system, so as to obtain an enriched Au-containing organic solution; and (5) reducing Au from the Au-containing organic solution through adopting oxalic acid, so as to obtain sponge gold. The method has the characteristics of high efficiency, environmental protection, high technological adaptability, high comprehensive resource utilization rate, wide application prospect, and the like, the pollution problem of strong acid acidification recovery is solved, and remarkable economic, environmental and social benefits can be created.

The invention provides a three-dimensional restoration method and system, terminal equipment and a storage medium, and the method comprises the steps: obtaining a second image from at least four pieces of image collection equipment after projection equipment projects a preset pattern to a to-be-scanned target; wherein the visual angle areas of the adjacent image acquisition devices in the at leastfour image acquisition devices are overlapped pairwise; wherein the second image comprises a to-be-scanned target projected with a preset pattern; performing feature extraction on the second image, and performing matching according to the extracted image features to obtain an image pair; wherein the image pair comprises at least two second images with overlapped scenes; respectively carrying outfeature point matching on the image pairs to obtain matching groups; performing calculation according to the matching group to obtain spatial points on the to-be-scanned target corresponding to the image features; and generating a three-dimensional model corresponding to the to-be-scanned target according to the space points. The method increases the number of image features, improves the precision of three-dimensional restoration, and reduces the cost of three-dimensional restoration.

The invention discloses a method for producing chromium-containing high-carbon steel by using stainless steel dust. The method comprises the following steps of adjusting the carbon content in molten steel and the oxygen content in the molten steel before refining in an LF ladle furnace; adjusting bottom blowing argon, and adding slag charge after the molten steel enters a ladle refining furnace; heating for the first time to adjust bottom blowing argon, and adding stainless steel dust briquettes and silicon iron; and heating for the second time to adjust bottom blowing argon, adding the slag charge, and adjusting the components to the target. Through adjustment and control of the bottom blowing flow in different stages of the refining process, the contact area between the steel slag can be fully increased, and the slag washing effect in the refining process is improved; a good dynamic condition is provided for diffusion of metal chromium reduced from the slag into the molten steel, and reduced Cr in the molten slag is prone to diffuse into the steel; and therefore that the yield in the Cr smelting process is improved.

The invention provides a method for enhancing classification-based software demand tracking link recovery through knowledge learning and an electronic device. The method comprises the steps: after text and structure information contained in a software demand and code file with a tracking relation to be determined is preprocessed, constructing a demand-code knowledge graph and a code dependency graph; modeling the structure and text information of the demand-code knowledge graph, and performing learning to obtain vectors of demand and code entities; modeling the relation of the triple in the demand-code knowledge graph to obtain a relation feature vector; and mining the code dependency graph, extracting inference rules for discovering R2C links between potential demands and codes, and expanding the training data scale. According to the method, an effective prediction model can still be obtained when the training data is less, so that the recovery accuracy of the R2C link is ensured, the recovery cost is reduced, and the workload of manually annotating the data is reduced.

The invention discloses a device for metal oxide fine ore gas-based reduction. The device sequentially comprises an oxidizing roasting system, a gas-based pre-reduction system and a gas-based deep reduction system according to a process sequence. The device further comprises a molecular sieve pressure swing adsorption system, a pure hydrogen muffle heat exchange heating furnace system and a dust removal and smoke exhaust system. According to the device, CO and H2 are separated out through the molecular sieve pressure swing adsorption device, after CO coal gas is firstly adopted for oxidizing,roasting and heating fine ore, fine ore with sensible heat of 900-1000 DEG C passes through a boiling pre-reduction furnace and is subjected to gas-solid boiling type sufficient contact and reductionreacting with H2 heated through muffle heat exchange, then boiling type sufficient deep reduction reacting is carried out on a gas-solid boiling deep reduction furnace and warm H2, and a high-qualityreduced iron (DRI) product is deeply reduced by utilizing high-temperature sensible heat of the fine ore in the gradual cooling process. The invention further comprises a method for carrying out metaloxide fine ore gas-based reduction by using the device.

The invention belongs to the technical field of dangerous waste treatment, and specifically relates to a waste acid reduction pneumatic mixing device. The waste acid reduction pneumatic mixing deviceis characterized in that a main body structure comprises an air compressor, an air pipeline, a mixing pipe, a baffle plate, sloping plates, iron powder, a material inlet, an outlet valve and a reaction tank, wherein the sloping plates are arranged around the bottom part of the reaction tank; the iron powder for reducing waste acid is contained in the bottom part of the reaction tank; the iron powder is concentrated and precipitated to the middle position of the reaction tank under the guiding of the sloping surfaces of the sloping plates; the mixing pipe which is vertically arranged is arranged right above the middle part of the reaction tank. Air generated by the air compressor can be conveyed to the bottom part of the reaction tank through the air pipeline, the waste acid can be blown, the waste acid drives the iron powder to enter the mixing pipe, and the iron powder and the waste acid can be seriously and fully mixed for reacting under the action of airflow agitation during an ascending process in the mixing pipe; the main body structure is simple, the design conception is ingenious, the use is safe and convenient, the application environment is environment-friendly, and a market prospect is wide.

The invention relates to the technical field of mineral resource utilization and specifically relates to a method of producing manganese monoxide by utilizing waste manganese dioxide. The method comprises the following steps: by taking low-grade manganese dioxide powder and common anthracite powder as raw materials, pre-heating by utilizing waste heat exchange to remove moisture, initially and quickly heating and roasting by utilizing medium-frequency magnetic wave induction, heating, roasting and reducing in a sectional manner by virtue of a thermal resistance wire, preserving heat and continuing to reduce, cooling by utilizing closed waste heat exchange, cooling by virtue of water quenching, discharging and enabling the raw materials to enter a storage bin to prepare efficient, energy-saving and cheap manganese monoxide roasted powder. According to the method disclosed by the invention, low-grade and low-cost manganese dioxide is adopted as production raw materials, so that recycling of the waste manganese dioxide can be realized.

The invention belongs to the technical field of harmful waste disposal, and relates to a waste acid reduction hydraulic power mixing device, the main body structure of which comprises a circulating pump, a reflux pipe, a mixing pipe, a baffle, a sloping panel, iron powder, a choke, a feeding hole, a discharge hole and a reaction tank, wherein the iron powder settles in the middle of the reaction tank in a concentrated way by the guidance of an inclined surface of the sloping panel, the vertically arranged choke is arranged over the middle of the reaction tank and is used for enhancing the jetflow suction force, so that the iron powder is sucked into the mixing pipe along with water flow; the pipeline of the reflux pipe runs through to the outside of the reaction tank, extends to the upperend of the side wall of the reaction tank along the outside of the reaction tank, and is connected with the reaction tank by a pipe, so that deliver waste acid at the upper part of the reaction tankis delivered to the lower port of the choke by the circulating pump, iron powder at the bottom of the reaction tank is driven to flow to the upper port of the mixing pipe by the flow of the waste acid, and the iron powder and the waste acid are sufficiently mixed and react in the ascending process in the mixing pipe; the mainbody structure is simple, the design concept is smart, the use is safe and convenient, and application is environmentally friendly, and the market prospect is wide.