17results about How to "Improve mineralization efficiency" patented technology

The invention discloses a supercritical carbon dioxide mineralization and storage method based on a paste filling technology. The supercritical carbon dioxide mineralization and storage method comprises the following steps: S1, preparing a paste filling material; s2, preparing supercritical carbon dioxide; s3, mineralization and storage: in order to realize large-scale mineralization and storage of CO2 in the mine, the mineralization and storage step comprises a mineralization filling slurry preparation process and a carbon injection mineralization process; according to the supercritical carbon dioxide mineralization and storage method based on the paste filling technology, the paste filling technology and supercritical carbon dioxide mineralization and storage are combined, mine solid waste with a large number of calcium and magnesium resources and supercritical carbon dioxide are fully mineralized, mineralization filling slurry is prepared and filled into an underground goaf, and the mining goaf is filled with the mineralization filling slurry. The mechanical property and the pore structure of the filling body are improved, the concept of treating waste with waste in a mine is met, and green mining of the metal mine is achieved.

The invention belongs to the technical field of solid waste resource utilization, and relates to a method and system for preparing vaterite type calcium carbonate from waste incineration fly ash. The method comprises the following steps: by taking ammonium chloride as a leaching agent, leaching the waste incineration fly ash in a leaching agent solution, and then carrying out solid-liquid separation to obtain a calcium solution; and carrying out carbonation reaction on the calcium solution, an alkaline compound, sodium dodecyl benzene sulfonate and carbon dioxide under the conditions that the pressure intensity is 0.5-0.7 MPa and the temperature is 25-180 DEG C for 60-90 minutes to obtain the calcium carbonate. According to the method, high-quality vaterite type calcium carbonate can be prepared at a high conversion rate, the risk of fly ash is reduced, and mineralization of carbon dioxide is realized, so that waste is treated by waste, and green production is realized.

The invention discloses a method and application of a nanocomposite excitation solution to strengthen the mineralization of solid waste materials, and belongs to the field of solid waste-CO 2 The technical field of underground joint disposal in coal mines. Sodium silicate is added to a sodium hydroxide solution to obtain an alkaline excitation solution, a polycarboxylic acid water reducer is mixed into the alkaline excitation solution, and an alkaline excitation base liquid is obtained; nano-scale silica particles are finally added to the alkaline excitation base liquid and mixed to obtain a nano-composite excitation solution, the nano-composite excitation solution is subjected to ultrasonic vibration at room temperature until it becomes transparent, and then solid materials are added to mix to obtain a solid waste material slurry, and then carbon dioxide gas is introduced into the solid waste material slurry while stirring to achieve mineralization; the gas-liquid two-phase interface area of ​​the solid waste material slurry is increased by nano-scale silica particles, and the diffusion coefficient of Brownian motion is increased, and at the same time, the nano-scale silica particles provide nucleation sites to better adsorb carbon dioxide, and the steps are simple and easy to implement.

The invention discloses a microorganism mineralization induced flood prevention preparation stone and a preparation method thereof. The microorganism mineralization induced flood prevention preparation stone is prepared from the following raw materials: a microorganism mineralization repairing agent, aluminum oxide, slag powder, silt, microorganism cementing liquid and steel fibers. The preparation method comprises the following steps: preparing the microbial mineralization repairing agent and the microbial cementing liquid, mixing the microbial mineralization repairing agent with alumina, adding the slag powder, stirring to obtain a composite gel material, mixing the composite gel material, the silt and the slag powder according to a preset ratio, adding the microbial cementing liquid to obtain mixed slurry, slowly adding the steel fibers into the mixed slurry, and stirring to obtain the composite gel material. And curing and demolding to obtain a sample, and curing to prepare the flood prevention preparation stone. The silt is used as a main raw material, microorganisms are added to accelerate mineralization and accelerate hydration of carbon dioxide, deconstruction and reunion of an active material are achieved, the pH value of a microorganism growth environment is reduced through aluminum oxide, microorganism adsorption sites are provided, and the corrosion resistance and strength of the stone are improved through the synergistic effect of aluminum oxide and steel fibers.

The invention belongs to a carbon dioxide storage and goaf coal spontaneous combustion prevention and control technology, and particularly relates to a coal spontaneous combustion prevention and control system through coal ash mineralization CO2 and products and an application method of the coal spontaneous combustion prevention and control system. The system comprises a slurry preparation unit, a flue gas pretreatment unit, a mineralization reaction unit and a slurry filling unit; fly ash treatment, CO2 capture and mineralization and mine grouting fire prevention and extinguishing are combined, alkaline earth metal ions in fly ash are promoted to be leached through a pulping stirring tank, CO2 in reaction flue gas is mineralized through calcium and magnesium ions in slurry, CO2 dissolution is promoted through pressurization, an impeller is arranged in a reactor, gas spirally ascends in the ascending process, and the gas is recycled. According to the method, the coal ash slurry serves as a gas inlet, the stroke of the gas in the slurry is increased, the retention time is prolonged, gas, liquid and solid mixing is promoted, meanwhile, the additive is combined to improve the mineralization reaction efficiency, continuous CO2 mineralization of the large-flow coal ash slurry is finally achieved, a product is injected into an underground goaf to be used for preventing and controlling coal spontaneous combustion, and then the multiple effects of coal ash solid waste treatment, CO2 emission reduction and disaster prevention and control are achieved.

The invention relates to a biochar enhanced microbial mineralization improved compacted clay covering barrier layer and a construction method thereof.The barrier layer is prepared from a urease bacterium excitation solution, a calcium acetate solution, biochar and site in-situ soil, the total dry mass of all components in the urease bacterium excitation solution accounts for 4.5%-8.5% of the mass of the site in-situ soil, and the total dry mass of all components in the calcium acetate solution accounts for 4.5%-8.5% of the mass of the site in-situ soil. The dry mass of the solute of the calcium acetate solution accounts for 4.0%-10.0% of the mass of the site in-situ soil material, and the dry mass of the biochar accounts for 4.0%-8.0% of the dry mass of the site in-situ soil material. Compared with the prior art, the method has the advantages that site in-situ soil materials are treated through an in-situ excitation microbial mineralization method, the seepage reduction and gas barrier performance of a compacted clay covering barrier layer can be remarkably enhanced, and meanwhile, the binding force enhanced by mineralization among soil particles plays an important role in inhibiting water loss and cracking of a soil body.

The utility model belongs to the technical field of building materials, and discloses an aggregate balling device which comprises a balling disc, an air inlet assembly, a material distributing structure and a driving part. The balling disc comprises a bottom disc and a cover plate, the bottom disc and the cover plate jointly define a containing cavity, and the cover plate is provided with an air inlet, an air outlet and a feeding port which are communicated with the containing cavity; the material distributing structure is at least partially arranged in the accommodating cavity; the driving part is connected with the chassis and used for driving the chassis to rotate relative to the cover plate and the distributing structure, so that raw materials located between the chassis and the distributing structure are balled. Thus, by arranging the material distributing structure and the driving part, the driving part drives the chassis to rotate, and therefore raw materials can be made into small balls; by arranging the gas inlet assembly, carbon dioxide gas is fully utilized, and green and environment-friendly effects are achieved; the cover plate is arranged to form the sealed containing cavity, carbon dioxide gas makes full contact with the raw materials, the carbon dioxide gas is continuously introduced into the containing cavity, the mineralization efficiency in the aggregate pellets can be improved, and mineralization distribution is more uniform.

The invention discloses a recycled aggregate synergistically enhanced by a two-step mineralization method and a grain shape optimization method and a preparation method thereof, and relates to the technical field of recycled aggregates, the preparation method comprises the following steps: crushing and screening waste concrete to obtain recycled aggregate particles; soaking the recycled aggregate particles in a mixed solution of a nucleating agent and an organic substrate solution, and then transferring into a reaction kettle; uniformly spraying the bacillus pasteurii liquid on the recycled aggregate particles at one time, then maintaining for 5 hours, stirring in the maintaining process, introducing carbon dioxide gas into the reaction kettle, adjusting the temperature and the humidity, maintaining the set environmental conditions, and mineralizing and enhancing the recycled aggregate particles; and the mineralized and enhanced recycled aggregate particles and cement powder are poured into a disc granulator for particle shape optimization, and finally the synergistically enhanced recycled aggregate is obtained and has higher physical properties and self-strength.

This invention discloses a flotation system based on a flotation reagent modification process, relating to the field of mineral processing technology and equipment. It includes a sealed modification chamber, the upper part of which is connected to an atomizing feed device. A heating device and a baffle plate are installed inside the modification chamber. A first vacuum pump is installed at the lower part of the modification chamber and connected to a gasified reagent outlet device. The flotation separation device includes a first bubble generator, whose inlet is connected to a slurry feed device, whose air inlet is connected to the gasified reagent outlet device, and whose outlet is connected to a flotation separator. This invention solves the problems of uneven dispersion and slow action of liquid reagents, and has the advantages of reducing reagent dosage, significantly increasing the collision probability and adhesion efficiency between the reagent and the target mineral, greatly improving the overall recovery rate, strong adaptability, and broad application prospects.

The utility model belongs to the technical field of water purification material production, and particularly relates to a mineralizer adding mechanism for calcium aluminate powder preparation, which comprises a weighing device, a screw conveyer, a mixing tank and a stirring device, and the weighing device is used for weighing the weight of a mineralizer; the screw conveyor is used for conveying the weighed mineralizing agent; the stirring device comprises a gear motor, a stirring shaft, a feeding pipe and a feeding pipe, the stirring shaft is in transmission connection with an output shaft of the gear motor, a storage cavity is formed in the stirring shaft, a stirring frame is arranged at the bottom of the stirring shaft, the top end of the feeding pipe is connected with a discharging port of the spiral conveyor, the bottom end of the feeding pipe is inserted into the storage cavity, and the feeding pipe is obliquely arranged; and the higher end of the feeding pipe is communicated with the bottom of the storage cavity. According to the device, through the stirring device, a mineralizing agent can be scattered while stirring is conducted, the mineralizing agent can be mixed into all layers of raw materials, the mixing uniformity of the raw materials is improved, the mineralizing efficiency of calcium aluminate powder is improved, and the product quality is improved.

The application belongs to the technical field of carbon dioxide mineralization curing concrete, and relates to a carbon dioxide mineralized concrete and carbon fixation device and method, which comprises a reaction kettle, a stirring system and a dry ice powder supply system. A rotating powder spraying arm coaxially connected with a stirring shaft is arranged in the reaction kettle, and powder spraying micropores for upward and horizontal spraying are arranged on the hollow arm body of the powder spraying arm. A flow guide groove penetrating through the upper surface and the lower surface of the stirring blade is arranged on the stirring blade, the inlet of the flow guide groove is located at the root of the upper surface of the blade, and the outlet is located at the middle of the lower surface and faces the powder spraying arm area. An adaptive baffle assembly composed of a movable baffle, a reset spring rod and a centrifugal counterweight is arranged at the inlet of the flow guide groove, which can automatically adjust the inlet opening according to the stirring speed. A cutting grid located below the powder spraying arm is further arranged in the reaction kettle. The application realizes the efficient and uniform mixing of dry ice powder and cement slurry through the space collision of rotating powder spraying and directional jet, centrifugal force adaptive adjustment and forced refinement of the cutting grid.

The invention relates to emulsified waste oil for a flotation reagent as well as a preparation method and application of the emulsified waste oil, belongs to the technical field of flotation, and is used for solving at least one of the problems of poor stability, poor dispersity, poor flotation effect and the like of the emulsified waste oil prepared by the existing method. PSBMA and Tween 80 are added in the preparation of the emulsified waste oil to serve as compound flotation reagents, the stability of emulsion can be improved, PSBMA is a long-chain polymer and has amphipathy, when PSBMA reacts with the waste oil, each macromolecular polymer adsorbed on an interface is similar to side-by-side aggregation of a plurality of connected small molecules, and the stability of the emulsion is improved. And when the macromolecular polymer is desorbed from an interface, the whole main chain needs to be removed, so that more energy is needed to break through a high-energy barrier, the stability of the emulsion is effectively improved, the collision probability with target minerals is increased, emulsion droplets are more easily in contact with particles and spread on the surface, and the flotation effect is effectively improved.

The application discloses a catalyst for catalyzing volatile organic compounds by using a samarium modified manganese oxide and a preparation method thereof, relates to a catalyst for organic compounds and a preparation method thereof, and discloses a samarium (Sm) modified manganese oxide catalyst and a preparation method and application thereof. 4+ The catalyst is Sm2Mn8, the Sm element is introduced by using a hydrothermal synthesis method, a Sm-O-Mn coordination structure is formed, high-density oxygen vacancies are generated, and a recyclable double-oxygen storage system is constructed. The structure stably maintains Mn , enhances oxygen migration ability and O2 activation ability, realizes low-temperature catalytic oxidation of toluene and other volatile organic compounds (VOCs), and has the advantages of high low-temperature activity, high CO2 selectivity, good water resistance and outstanding long-term stability. The catalyst has significant catalytic oxidation performance on VOCs such as toluene at low temperature, and has excellent water resistance and long-term stability.

The invention discloses a low-pressure filtration method for improving mineralization efficiency of a traditional Chinese medicine ore healthy food therapy health-preserving water purifier, removing peculiar smell, and the main technology of the invention is divided into three parts: the first part is that the mineralization efficiency of traditional Chinese medicine ore and shells in the water mineralization process is relatively low, and the mineralization efficiency of the traditional Chinese medicine ore and shells in the water mineralization process is relatively high through an innovative laminated circulating mineralization technology; the mineralization efficiency of the traditional Chinese medicine ore and the shell in the water mineralization process is greatly improved, and the technical problem that the mineralization efficiency of the traditional Chinese medicine ore and the shell is low is successfully solved; secondly, the water purifier is low in filtering efficiency, the filtering efficiency of drinking water is greatly improved through an innovative purified water filtering and pressure reducing technology, and the technical problem that the filtering efficiency of tap water is low when the water pressure is low is successfully solved; thirdly, in the water mineralization process of the water purifier, the traditional Chinese medicine ores and the shells release harmful substances and peculiar smell while releasing elements beneficial to the human body, and the harmful substances and peculiar smell released by the traditional Chinese medicine ores and the shells in the water mineralization process are effectively removed through the innovative stacked tight mineralization technology.

The invention discloses a device and a method for mineralizing CO2 in flue gas by using solid waste, and belongs to the technical field of carbon sequestration. The mineralization reactor is provided with a nozzle and a microbubble generator, solid waste slurry enters the mineralization reactor through the nozzle in a jet flow mode, and flue gas enters the mineralization reactor through the microbubble generator in a microbubble mode; microbubbles can be reserved for a longer time, meanwhile, a large amount of gas-liquid phase interface area is provided, the turbulent mixing degree of gas and liquid can be increased and the updating frequency of the gas-liquid phase interface can be increased by slurry in a jet flow mode, CO2 in flue gas can be fully absorbed and reacted under the combined action of the slurry and the gas-liquid phase interface, the mineralization efficiency is remarkably improved, and the energy consumption is reduced. And the obtained carbonate product is small in particle size and high in quality.

The present application relates to a vertical mineralization reactor, system and method for preparing artificial aggregate from mineralized CO2, the reactor comprising a body provided with a shaped green body inlet, a mineralized aggregate outlet, a flue gas inlet and a tail gas outlet; a moving bed and a fixed bed are arranged in the reaction cavity, the shaped green body entering the reaction cavity passes through the moving bed and then enters the fixed bed; the moving bed comprises a plurality of inclined and staggered sieve trays, and the shaped green body moves step by step on the sieve trays. The moving bed can slow down the impact of the green body, prolong the flow path of the shaped green body and CO2, increase the gas-solid two-phase countercurrent contact time to promote the mass transfer process, and improve the product qualification rate; the fixed bed can ensure the uniformity and mechanical properties of the product. The vertical reactor can save space, and the system integrated with the reactor can realize low-cost carbon capture and utilization by directly mineralizing low-concentration flue gas CO2 from solid waste, low-temperature micro-positive pressure mineralization curing can reduce the operation energy consumption, and fresh flue gas and atomized water can improve the mineralization efficiency.

The invention relates to a bionic filling mining method for an underground metal mine. The method comprises the following steps: stoping in sections in a stope; a bionic honeycomb air bag support; carrying out gradient microorganism consolidation filling; multi-source data fusion monitoring regulation and control; and subsection filling is conducted on the secondary mining section. Firstly, a bionic hexagonal honeycomb air bag and nanometer tear-resistant coating supporting structure is adopted, a pressure-displacement dual-mode sensor is combined, supporting of the goaf is rapidly and accurately completed, and it is ensured that the supporting compressive strength meets the long-term stability requirement under the deep high-stress and strong blasting impact environment. Then the modified tailing cementing slurry, a Thermus sp gradient bacterial agent and a nano calcium carbonate crystal nucleus are synergistically mineralized, so that the mineralization time is greatly shortened, and the recovery efficiency is improved; the filling body forms a matched surrounding rock stress arch with a hard bottom and a soft top through a process of adding the microbial agent in a gradient decreasing manner from bottom to top and a layered pouring process, so that the phenomena of bottom crushing and top void are eliminated.