113 results about "Biomass ash" patented technology

The invention belongs to the technical field of solid waste resource utilization, and discloses an activity-enhanced solid waste-based sludge curing agent as well as a preparation method and application thereof. The sludge curing agent comprises the following raw materials in percentage by mass: 30-40% of cement, 15-25% of S95 mineral powder, 15-23% of steel slag powder, 16-26% of an activity enhancing component and 0.5-3% of a composite exciting agent, wherein the activity enhancing component is prepared from the following raw materials in percentage by mass: 35 to 40 percent of desulfurized gypsum, 35 to 40 percent of carbide slag and 20 to 30 percent of biomass ash; the composite exciting agent comprises the following raw materials in percentage by mass: 30-35% of metakaolin, 30-35% of sodium sulfate, 15-20% of sodium silicate and 15-20% of sulfonated oil. According to the sludge curing agent, the industrial solid waste accounts for 57% or above, the desulfurized gypsum, the carbide slag and the biomass ash form an activity enhancing component, the activity enhancing component is matched with the composite exciting agent to jointly enhance and excite the activity of the metallurgical slag solid waste, and therefore the excellent curing effect is achieved, and when the sludge curing agent is used for sludge curing, the 3d unconfined compressive strength of a sludge curing body is larger than or equal to 0.5 MPa; and the 28d unconfined compressive strength is greater than or equal to 1.4 MPa.

The invention provides a biomass gasification system and a fluidized bed gasification process, the system comprises a fluidized bed gasification furnace, a cyclone separator and a material returning leg, the fluidized bed gasification furnace is provided with a gasification cavity and a gas chamber, and a fluidized bed formed by bed materials is arranged in the gasification cavity. Bed materials are added into the gasification furnace in a spiral feeding and pneumatic conveying combined mode, a fluidized bed is established, biomass particles are added after temperature rise, the pressure in the gasification furnace is kept to be certain, and an auxiliary gasification agent enables the biomass particles to be in a fluidized state. According to the invention, the melting characteristic of biomass ash can be effectively improved, the problem of easy slag bonding during biomass gasification is solved, the gasification temperature is effectively increased, and the methane content in the synthesis gas is reduced. The bed material can catalytically crack tar generated in the biomass gasification process, the quality of synthesis gas is optimized, the synthesis gas is prevented from being bonded and attached to the metal wall of a downstream device, the yield of the synthesis gas and the stability of the device are improved, and the heat exchange efficiency of a downstream waste heat recovery unit is enhanced.

The invention provides an underwater non-dispersible grouting material as well as a preparation method and application thereof, and relates to the technical field of constructional engineering. Specifically, the red mud concrete comprises the following components in parts by mass: 150-250 parts of red mud, 10-80 parts of Portland cement, 1-8 parts of an alkali activator, 3.5-10 parts of an anti-dispersing agent, 0.5-8 parts of a water reducing agent and a certain amount of water, wherein the alkali activator comprises biomass ash, tungstate, silicate, silica fume, arginine and inorganic alkali, and the anti-dispersing agent preferably comprises sodium alginate modified polyvinyl alcohol, a cellulose compound, stone powder and maltodextrin. The grouting material is obtained by recycling the red mud as a basic raw material, and has the advantages of excellent flowing state, excellent setting time, excellent compressive strength, better underwater dispersion resistance, better construction fluidity and better durability; the preparation process is simple, the performance is excellent, the environment-friendly effect is realized, and the application prospect is good.

A method for easily and efficiently reducing the amount of alkali metals in prescribed woody biomass ash, wherein woody biomass ash having a pH level of 12.5 or higher is subjected to a heat treatment at 60-100°C in water at normal pressure.

The invention discloses a process for converting biomass particles into synthesis gas by using pressurized bubbling fluidized bed equipment. The process comprises the following steps: feeding the biomass particles and fluidizing agent particles as raw materials into a gasification furnace; the gasification furnace comprises a fluidized bed area, a secondary gasification area and a post gasification area; a plurality of layers of gasification nozzles are designed in the gasification furnace, tar generated by biomass gasification can fully react in a high-temperature area of the gasification furnace, and synthesis gas generated by the pressurized bubbling fluidized bed gasification furnace enters a cyclone separator to be separated and then enters a synthesis gas cooler to be cooled; the cooled synthesis gas enters a synthesis gas filter, and the filtered synthesis gas enters a shock cooling system; the synthesis gas filtered by the synthesis gas filter enters a quench cooler of the quench system to be fully contacted with water for cooling and then enters a washing tower for washing, and the cooled and washed synthesis gas enters a downstream area; according to the invention, biomass ash fusion is reduced; and tar is reduced and eliminated.

The application discloses a device and method for preparing green hydrogen through biomass pyrolysis and gasification, relates to the technical field of green hydrogen preparation, and solves the problems of blockage and corrosion caused by ash melting and slagging in the pure oxygen gasification process, and the problem of low energy utilization rate. The device for preparing green hydrogen through biomass pyrolysis and gasification comprises a pyrolysis reaction device, and the pyrolysis reaction device comprises a pyrolysis reaction tank connected with a high-temperature heat carrier conveying spiral, a biomass raw material storage bin, a biomass raw material conveying spiral and a pyrolysis solid-phase product conveying spiral. In the application, biomass raw materials are converted into biochar and pyrolysis oil gas through pyrolysis technology, the biomass ash is effectively cut, and problems such as blockage and corrosion caused by ash melting and slagging in the pure oxygen gasification process are effectively avoided; the high-temperature pyrolysis oil gas is directly subjected to pure oxygen gasification reaction through gasification technology, the sensible heat and latent heat in the pyrolysis oil gas are fully utilized, and the energy utilization rate is high.

A method for purifying sylvite from biomass ash comprises the following steps: 1) acid leaching: mixing the biomass ash with an acid solution, stirring, and carrying out solid-liquid separation to obtain potassium-containing acid leaching liquid and leached ash; 2) impurity removal: adding alkali into the potassium-containing pickle liquor to adjust the pH value to 11-13, adding sodium carbonate, stirring, and carrying out solid-liquid separation to obtain a potassium-containing solution and a metal precipitate; 3) concentration: concentrating the potassium-containing solution; 4) evaporative crystallization: performing evaporative crystallization on the concentrated potassium-containing solution to obtain potassium salt and a residual sodium-containing solution; 5) drying: drying the potassium salt to obtain a potassium salt product; and bipolar membrane electrodialysis: introducing the residual sodium-containing solution into a bipolar membrane electrodialysis device for bipolar membrane electrodialysis treatment, recycling the obtained acid solution to the step 1), and recycling the obtained alkali to the step 2). According to the method, high-purity sylvite can be obtained, the product value is high, the process is simple, the cost is low, and cyclic utilization of water resources is realized.

The invention provides a preparation method and application of a biomass ash-based zeolite molecular sieve adsorbent, and relates to the field of solid waste utilization. The preparation method of the biomass ash-based zeolite molecular sieve adsorbent comprises the following steps: crushing and grinding biomass ash, uniformly mixing with sodium hydroxide, roasting in a muffle furnace to obtain biomass ash clinker, mixing the biomass ash clinker with deionized water, stirring, and aging to obtain aged slurry; carrying out hydrothermal reaction on the aged slurry, separating out solid precipitate, and drying to finally obtain the biomass ash-based zeolite molecular sieve adsorbent. The method overcomes the defects in the prior art, the ash of a biomass power plant is used as a raw material, the zeolite molecular sieve with excellent adsorption performance is prepared through alkali fusion roasting activation and hydrothermal synthesis, and the zeolite molecular sieve has good lead ion adsorption performance.

The invention discloses a method for preparing a soil conditioner and its application, and belongs to the technical field of soil conditioners. The method for preparing a soil conditioner provided by the invention comprises the following steps: extraction of humic acid and fulvic acid from humus; preparation of fulvic acid cross-linked chitosan; fulvic acid cross-linked chitosan, bentonite, fly ash, earthworm feces, biomass ash and humic acid are uniformly mixed in proportion to prepare the soil conditioner. Among them, fulvic acid cross-linked chitosan can improve the water absorption performance of chitosan, reduce the acidity and leaching solubility of fulvic acid, and fulvic acid can be gradually released along with the slow degradation of chitosan, which can achieve the effect of long-term improvement of soil performance.

The invention discloses a high-activity red mud-biomass ash composite oxygen carrier and a multistage construction method and application thereof, and belongs to the technical field of solid waste resource utilization, pretreated red mud powder and biomass ash are compounded, and the biomass ash composite red mud oxygen carrier is prepared after drying and roasting; through modification of K and Ca components in the biomass ash, a high-activity phase is directionally generated in the red mud, an alkaline site is introduced, the oxygen vacancy concentration is increased, and the surface property is optimized; when the oxygen carrier is applied to a chemical looping gasification process, the release activation energy of lattice oxygen can be reduced, the reaction rate and the carbon conversion rate can be improved, the generation of CO2 can be inhibited, the selectivity and the yield of synthesis gas can be improved, and the oxygen carrier has excellent anti-sintering capability and cycling stability; a large amount of solid waste red mud and biomass ash are used as raw materials, the oxygen carrier preparation process has the characteristics of low cost, simple process and environmental friendliness, and a new way is provided for high-value utilization of the red mud and the biomass ash and industrial application of a chemical looping technology.

The present invention discloses a two-step, strong and weak filling method for continuous mining and filling with biomass ash and carbon sequestration. In the first filling step, biomass ash is used to replace cement or fly ash to increase the strength of the filling body and form a strong filling. In the second filling step, carbon dioxide is simultaneously injected to create a carbon sequestration cavity, forming a weak filling. Both filling steps adopt a full filling method, requiring the filling slurry to connect with the roof. The present invention adopts an alternating arrangement of strong and weak filling, effectively sealing and sealing carbon dioxide while strictly ensuring the safety and stability of the overburden above the mining site. It also recycles biomass ash solid waste, reduces material preparation and carbon sequestration costs, and improves economic and social benefits.

The present invention discloses a method for predicting the dynamic fouling and slagging tendency of biomass ash based on the change of ashing temperature, which relates to the technical field of predicting biomass ash fouling and slagging, and includes: determining the sintering rate and sintering characteristic index of biomass ash at different temperatures; determining the melting characteristic temperature and melting characteristic index of biomass ash at different temperatures; determining the fixed-phase fouling and slagging index and volatile-phase fouling and slagging index during the ashing process of biomass ash at different temperatures; and determining the comprehensive fouling and slagging tendency of biomass ash. The beneficial effect of the present invention is that, based on the change rules of the melting characteristic index and ash sintering rate of biomass ash at different ashing temperatures, and simultaneously considering the distribution and allocation rules of alkali metal components in the fixed phase and volatile phase during the fouling and slagging process of biomass ash, it makes up for the deficiency of ignoring the melting characteristics and sintering characteristics of biomass ash in the prior art, and improves the accuracy and reliability of the prediction results of the dynamic fouling and slagging tendency of biomass ash at different ashing temperatures.

The application discloses a method for preparing activated carbon precursor by removing biomass ash through wood vinegar and hydrothermal carbonization. Biomass raw materials are subjected to hydrothermal carbonization in a wood vinegar liquid medium to obtain biomass-based activated carbon precursor. The application innovatively utilizes the effective organic acid components in the acidic wood vinegar and combines hydrothermal carbonization to avoid the use of strong acid and strong base and pollution caused in the washing process. The method is easy to realize industrial popularization and application and is environment-friendly without significantly increasing the process cost. In addition, the method fully utilizes the acidic liquid byproduct, wood vinegar, in the process of preparing biochar through biomass pyrolysis, and realizes high-value comprehensive utilization of the biomass pyrolysis product on the basis of preparing the biomass-based activated carbon precursor.

The invention discloses a biomass power plant ash composition for improving soil carbon sink as well as a preparation method and application of the biomass power plant ash composition, and belongs to the technical field of agricultural resources and environment. The composition is formed by compounding fly ash and slag according to the dry basis mass ratio of (2-3): 1, and the heavy metal content of the composition meets the agricultural safety standard. The preparation method comprises the steps of raw material pretreatment and optimized compounding. The core of the method is that the fly ash is used as a main carbon source by increasing the proportion of the fly ash, physical protection is provided by utilizing the microporous structure of the slag, and the fly ash and the slag jointly act on the soil, so that the organic carbon library of the soil is rapidly and stably increased. Experiments show that the composition provided by the invention can significantly improve the organic carbon content and the carbon library management index (CPI) of soil, effectively reduce the daily average mineralization rate of organic carbon, and realize efficient and high value-added resource utilization of biomass ash in the field of soil carbon sequestration.

The invention relates to the technical field of low-carbon gelling, in particular to a preparation method of a low-carbon gelling material containing AOD (Argon Oxygen Decarburization) slag solid waste. The preparation method comprises the following steps: adding 50-60 parts of activated AOD slag and 20-30 parts of modified aluminum oxide into 80-100 parts of water, stirring and dispersing to form a matrix suspension, sequentially adding 10-15 parts of biomass ash, 5-8 parts of nano CaCO3 and 3-5 parts of sodium carbonate into the matrix suspension, and stirring at the stirring speed of 200-300 rpm for 30-40 minutes; 0.8-1.2 parts of superfine basalt fibers and 0.3-0.6 part of sodium gluconate are added, the mixture is stirred at the speed of 500-600 rpm for 15-20 min, and the low-carbon cementing material is obtained. The early strength increasing speed of the low-carbon cementing material containing the AOD slag solid waste is increased, and the durability of the low-carbon cementing material containing the AOD slag solid waste under complex environmental conditions is improved.

The invention discloses a method for efficiently utilizing biomass in a metallurgical blast furnace, which comprises the following steps: S1, pretreating a biomass raw material to obtain a biomass crushed material; s2, drying the biomass crushed material to obtain a biomass dried material; s3, baking the biomass dried material at low temperature to obtain a biomass baked material; s4, performing primary pyrolysis on the biomass baking material to obtain primary pyrolysis gas and biomass pyrolysis carbon; s5, the biomass pyrolytic carbon is subjected to secondary pyrolysis, and biochar, biomass ash and secondary pyrolysis gas are obtained; and S6, the first-stage pyrolysis gas is heated and purified, and then the purified first-stage pyrolysis gas and the purified second-stage pyrolysis gas are sprayed into the blast furnace to serve as an energy medium and a reducing agent to be utilized. According to the method, the biomass energy can be used for the metallurgical blast furnace, and the influence of alkali metal elements introduced into the biomass on the quality of blast furnace equipment and steel products can be avoided.

This invention discloses a method for screening the stability of biomass-derived hard carbon raw materials. The method involves treating biomass materials from different sources and batches that can be used to prepare hard carbon with an acid solution, then testing the sugar content, ash content, and coin capacity of the finished hard carbon. The method utilizes the relationship between these parameters to simply and quickly screen out biomass-derived hard carbon raw materials with good stability, thereby obtaining biomass-derived hard carbon materials with excellent battery cycle stability and good electrochemical performance. When the biomass ash content, sugar content, and coin capacity of the biomass-derived hard carbon after acid treatment satisfy the relationship 10≤α / β×σ≤50, an effective balance between biomass ash and sugar content can be achieved. This balance allows for the formation of a specific porous structure, increasing sodium storage sites and improving sodium ion conductivity, while also preventing excessive ash and impurities from affecting the electrochemical performance of the hard carbon material. This ensures the high energy storage capacity and excellent cycle stability of the hard carbon material.

The invention relates to the technical field of agricultural planting, and particularly discloses a continuous cropping planting method for potatoes. The invention relates to a method for continuous cropping of potatoes, which comprises the following steps of: spreading biomass ash for disinfection before plowing, ditching by adopting a ditch sowing mode after plowing, applying a soil remediation fertilizer according to the dosage of 2000-3000Kg / mu, covering a mulching film on the surface of soil after colonization, and when seedlings enter a tillering stage from resettling to main stem capping and leaf unfolding, covering the mulching film with the soil remediation fertilizer. The leaf fertilizer solution is sprayed on the front and back faces of the potato leaves for the first time through a sprayer, the leaf fertilizer solution is sprayed for the second time after 13-15 days until water films are generated on the leaf surfaces and do not drop, and the leaf fertilizer solution contains nano-selenium and growth hormone. The continuous cropping planting method for the potatoes can be used for overcoming the continuous cropping obstacles of the potatoes and improving the single-plant tuberization number and the nutrient content in tubers of the potatoes planted in the continuous cropping mode of the potatoes.

The invention discloses an anti-coking system for a material returning device of a biomass circulating fluidized bed gasifier. The system comprises a circulating fluidized bed gasification furnace used for biomass gasification, the upper portion of the circulating fluidized bed gasification furnace is communicated with a cyclone separator, the bottom end of the cyclone separator is communicated with a return feeder, an outlet of the return feeder is communicated with the circulating fluidized bed gasification furnace, and the side edge of the cyclone separator is communicated with an inclined chute. An inlet of the inclined chute is communicated with a quantitative feeder, the upper end of the quantitative feeder is communicated with a gate valve, an inlet of the gate valve is communicated with a hopper, an inlet of the hopper is communicated with a conveyor, an inlet of the conveyor is communicated with an elevator, and a high-melting-point ash feeding port is formed in the lower portion of the elevator. The biomass ash melting point at the coking position is changed, the coking problem is fundamentally solved, steam can be sprayed into the coking position for rapid cooling, and therefore the coking phenomenon is avoided.

The invention discloses a method for preparing a flue gas desulfurizer from phosphate tailings cooperating with multiple solid wastes and application thereof, and the method comprises the following steps: calcining phosphate tailing fine powder to obtain calcined phosphate tailings containing calcium oxide and magnesium oxide; mixing the steel slag fine powder, the red mud fine powder, the composite additive, the biomass ash and the calcined phosphate tailings to obtain a mixture; mechanically activating the mixture, and molding to obtain a molded body; and curing the molded body, and then carrying out heat treatment to obtain the flue gas desulfurizer. Through process optimization and pretreatment component compounding, the desulfurizer with a porous skeleton structure taking calcium iron silicate as a main body is constructed, the desulfurizer is high in desulfurization activity, the specific surface area reaches 38-85 m < 2 > / g, the stability is good, and the desulfurizer has excellent mechanical strength and anti-sintering performance, so that the finally prepared desulfurizer maintains high desulfurization efficiency, and the desulfurization effect is good. And the device is suitable for low-temperature and high-sulfur flue gas environments.

The invention provides an eco-friendly fully-degradable material solid waste resource slope restoration method, and relates to the technical field of slope soil governing, the method comprises the following steps: compost fermentation is carried out on decomposed farmyard manure, sawdust, peat soil, steel slag and fly ash to obtain an organic material; mixing nitrogen-fixing bacteria, phosphate solubilizing bacteria and potassium solubilizing bacteria to obtain a complex microbial inoculant; uniformly mixing zeolite powder, gypsum and biomass ash to obtain a soil conditioner; mixing the biomass particles with a water-retaining agent and a complex microbial inoculant to prepare a biomass carrier; mixing the organic material, the complex microbial inoculant, the soil conditioner, the biomass carrier and the water-retaining agent to obtain the soil conditioner; an improved soil layer is laid after the slope is pretreated, and plants are planted on the surface of the improved soil layer. According to the method, the technical problems that plants planted on the slope are difficult to survive and the vegetation planting rate is low are effectively solved.

The invention provides an environment-friendly gravel concrete preparation process which comprises the following steps: mixing low-clinker gel, modified biomass ash and iron powder, and uniformly stirring to obtain a mixture A; then adding the recycled aggregate and the modified sand grains into the mixture A, and uniformly stirring to obtain a mixture B; adding a water reducing agent into the mixture B, and uniformly stirring to obtain a mixture C; and then adding seawater electrolytic calcium carbonate paste into the mixture C, and uniformly stirring to obtain the environment-friendly gravel concrete. The recycled aggregate is prepared by modifying waste concrete blocks. The environment-friendly gravel concrete has good environmental protection property, mechanical strength and working performance.

The application discloses modified biomass ash as well as a preparation method and application thereof, and belongs to the technical field of modified materials. The preparation method of the modified biomass ash comprises the following steps: mixing biomass ash, poultry feather hydrolysate and a flocculating agent, and then drying to obtain the modified biomass ash. The application further provides modified biomass ash prepared by the above preparation method. In addition, the application further provides application of the modified biomass ash prepared by the above preparation method or the modified biomass ash in preparation of a soil conditioner. The modified biomass ash can improve heavy metal contaminated soil and improve the quality of crops.

A binder including at least 1% of carbonated biomass ashes and construction material including the cementitious composition.

The invention discloses a basalt fiber reinforced autoclaved concrete slab and a production process thereof, and the basalt fiber reinforced autoclaved concrete slab is prepared from the following components in parts by weight: 200 to 300 parts of ordinary silicate low-carbon cement, 100 to 200 parts of quick lime, 100 to 200 parts of carbide slag, 200 to 300 parts of high-calcium fly ash, 210 to 410 parts of crushed marble powder, 150 to 200 parts of biomass ash, 150 to 200 parts of furnace slag, 50 to 100 parts of granulated blast-furnace slag and 3 to 5 parts of phosphogypsum. The water accounts for 60%-65% of the total mass of the materials, the metal aluminum powder accounts for 0.6%-0.8% of the total mass of the materials containing the water, and the modified basalt fiber accounts for 0.7%-1.2% of the total mass of the materials containing the aluminum powder. The defect that rod-shaped or filament basalt fibers are difficult to install and arrange in a mold is overcome, and the same effect as that of using filaments is achieved by using the technology of automatically connecting the short fibers.

The invention discloses a device and a system for preparing green synthesis gas from biomass, relates to the technical field of preparation of green synthesis gas, and solves the problems that when the green synthesis gas is prepared, biomass ash is easy to melt, and continuous operation of the device and the system is difficult to guarantee. And meanwhile, the problem of low efficiency during preparation of the green synthesis gas is solved. The device for preparing the green synthesis gas from the biomass comprises a conversion device, the pyrolysis oil gas inlet is communicated with one side of the conversion device; the converted gas outlet is communicated with the other side of the conversion device; the catalyst inlet is communicated with the top of the conversion device; the catalyst outlet is communicated with the bottom of the conversion device; and the compressed gas stirring mechanism is arranged in the conversion device. According to the invention, the problem that the biomass is easy to melt due to a low ash melting point can be effectively avoided, the high-oil-content pyrolysis oil gas of the biomass can be efficiently converted into the synthesis gas, meanwhile, a pure oxygen system does not need to be additionally arranged, and the investment and the safety risk of the system are reduced.

The invention belongs to the technical field of harmless treatment of garbage, and particularly relates to a biomass-synergistic household garbage gasifier liquid-state deslagging method which comprises the following steps: component determination: respectively determining ash components of household garbage ash and ash components of biomass ash; fluxing agent selection: selecting one biomass or a biomass mixture obtained by mixing at least two biomasses as a biomass fluxing agent according to ash components of the household garbage ash and the biomass ash; and gasification reaction: mixing the household garbage and the biomass fluxing agent, carrying out gasification reaction on the obtained mixture, and discharging ash. According to the method, the heat value of the gasification raw material is guaranteed, and the FT temperature of the household garbage gasification reaction ash is reduced, so that the requirement for the reaction temperature is reduced, the energy consumption of equipment operation is reduced, the equipment operation cost is reduced, meanwhile, the temperature interval is expanded, the fluctuation temperature of a slag discharging opening is met, smooth liquid slag discharging is achieved, and the equipment operation stability is improved.

The invention relates to the technical field of biomass particle heavy metal detection, in particular to a denitration method and system based on biomass particle combustion, and the denitration method comprises the following steps: performing combustion operation on unburned biomass particles to obtain biomass ash, screening the biomass ash to obtain biomass coarse ash and biomass fine ash, performing heavy metal detection on the biomass coarse ash, and screening the biomass fine ash to obtain the biomass fine ash and the biomass coarse ash. Carrying out heavy metal detection on the biomass fine ash to obtain a fine ash heavy metal value, if the heavy metal value of the coarse slag or the heavy metal value of the fine ash is determined to be greater than a preset standard threshold value, carrying out heavy metal separation to obtain separated biomass and heavy metal, and carrying out acid pickling on the heavy metal to obtain a neutralized solution; and detecting the gas safety index of the combustion gas, and based on the comprehensive combustion characteristic index value, separating the biomass, safely combusting the gas and neutralizing the solution to complete denitration based on biomass particle combustion. According to the invention, heavy metals can be effectively separated and recovered from biomass ash.

The invention relates to a large-dosage biomass ash brick as well as a preparation method and application thereof, and belongs to the technical field of biomass ash bricks. According to the invention, the polypropylene fibers are modified, and sulfonic acid groups and phosphonate groups are grafted on the surfaces of the polypropylene fibers, so that the hydrophilicity of the polypropylene fibers is improved, the polypropylene fibers are more easily infiltrated, agglomeration among the polypropylene fibers is effectively inhibited, and the polypropylene fibers can be uniformly dispersed in a mixture; in addition, phosphonate groups on the surfaces of the polypropylene fibers can effectively improve the loading efficiency of nano-alumina loaded on the surfaces of the polypropylene fibers, and the nano-alumina loaded on the surfaces of the polypropylene fibers can be subjected to a pozzolanic reaction with slaked lime in a cement hydration product, so that the surface of the biomass ash brick is effectively protected. The overall strength of the polypropylene fiber skeleton is effectively improved.

The invention discloses low-carbon autoclaved aerated concrete and a preparation method thereof. The low-carbon autoclaved aerated concrete is prepared from the following components in parts by weight: 90 to 110 parts of a mixture A, 10 to 30 parts of cement, 0.06 to 0.1 part of oily aluminum powder paste, 0.01 part of sodium alpha-alkenyl benzene sulfonate, 0.05 to 0.1 part of basalt fiber with the length of 10 to 20 mm, 0.1 to 4.5 parts of phosphogypsum and 0.5 to 0.9 part of sodium silicate, the main components of the mixture A are calcium hydroxide, silicate minerals and calcium fluoride, and the mixture A is obtained after biomass ash and carbide slag are treated. According to the invention, each component element of the biomass ash is fully utilized, the potash fertilizer with high value is obtained, the content of potassium chloride is greater than 50%, methane and carbon monoxide are generated by gasification of potassium chloride and water with high carbon content, and a production boiler is heated to generate high-temperature water vapor after combustion. Used materials are simple, industrial waste is fully utilized, and the material cost of production is reduced.