60results about How to "Efficient resource utilization" patented technology

The invention discloses a method for degrading dioxin in fly ash and stabilizing heavy metals, which comprises the following steps: carrying out water washing treatment on the fly ash, and carrying out solid-liquid separation to obtain water washing slag; mixing the washed slag with water, adding zero-valent iron and sulfite, carrying out hydrothermal treatment, and carrying out solid-liquid separation to obtain hydrothermal slag and hydrothermal liquid; according to the method for degradation of dioxin in fly ash and stabilization of heavy metal in cooperation with degradation of dioxin in fly ash, under the combined action of zero-valent iron, chlorite and a hydrothermal environment, efficient degradation of dioxin in fly ash can be rapidly achieved under the lower reaction condition, stabilization of heavy metal in fly ash can be synchronously achieved, and the method is suitable for industrial production. The method has the advantages of being low in cost, mild in reaction condition, high in treatment efficiency, good in treatment effect, environmentally friendly and the like, can effectively solve the problems existing in the prior art, provides powerful support for harmless treatment and resource utilization of the waste incineration fly ash, and has wide engineering application prospects.

The invention relates to the technical field of building materials, and discloses an ardealite-based cementing material and a preparation method thereof, and the ardealite-based cementing material comprises the following component materials: 70-90% of ardealite; 1%-15% of waste slag; 3%-10% of fly ash; 1%-10% of a nano modifier; the ardealite is pretreated, so that the moisture content of the ardealite is less than or equal to 5%, the particle size distribution of the ardealite is adjusted to be 3-5 [mu] m in a D90 range, and the nano modifier comprises but is not limited to a silane coupling agent, graphene oxide nano particles and a composition of the silane coupling agent and the graphene oxide nano particles. The ardealite, the waste slag, the fly ash and other industrial wastes are used as main raw materials, so that efficient resource utilization of solid wastes is realized, the problems of environmental pollution and land occupation caused by solid waste stockpiling are reduced, the requirements of circular economy and sustainable development are responded, and meanwhile, the preparation process of the material is low in energy consumption, less in pollution and suitable for industrial production. And a low-carbon and environment-friendly solution is provided for the building industry.

The invention provides a waste refractory material recycling process which comprises the following steps: S1, collecting a plurality of waste refractory materials from sources such as a waste refractory material storage yard and a thermal power plant, and classifying according to characteristics such as components, types and performances of the materials; s2, crushing the classified waste refractory materials by adopting a jaw crusher, a cone crusher or an impact crusher according to different materials and different properties, then grinding and grading by adopting a ball mill or a Raymond mill, and directly crushing and grading the fly ash solid waste by adopting an advanced ball milling technology provided with a double-layer screening bin separation plate and an activation lining; s3, for impurity components in the solid waste subjected to crushing treatment, performing magnetic separation, and performing immersion cleaning with an acid-base solution to remove impurities; and S4, adding an active additive and a pore-forming agent into the material obtained in S3, uniformly mixing, and then sequentially performing drying, high-temperature calcination, crushing and grading post-treatment, performance detection and product warehousing. According to the invention, the adverse effects of waste discharge and over-mining of natural mineral resources on the ecological environment are effectively reduced.

The utility model provides a methanol catalytic synthesis system utilizing carbon dioxide in dry quenching circulating gas, which is characterized in that an inlet of a desulfurizing tower of a dry quenching circulating gas decarburization system is used for introducing the dry quenching circulating gas, and a purified gas outlet of the desulfurizing tower is connected with a gas inlet of a decarburization absorption tower; an absorption liquid outlet of the decarburization absorption tower is communicated with an absorption liquid inlet of the desorption tower, an absorption liquid outlet of the desorption tower is communicated with an absorption liquid inlet of the decarburization absorption tower, a flue gas outlet of the desorption tower is communicated with an inlet of the CO2 separation device through the flue gas cooler, and a CO2 gas outlet of the CO2 separation device is communicated with an inlet of the catalytic reactor through the compression device; a hydrogen outlet of the coke oven gas hydrogen production system is communicated with an inlet of the catalytic reactor through the compression system, and methanol is synthesized from carbon dioxide generated by a dry quenching production unit in a coking plant and hydrogen generated by a coke oven gas unit in the catalytic reactor, so that effective utilization of resources is realized.

The invention provides a construction method of a multi-element solid waste-based cementing material roadbed filler, and relates to the technical field of road engineering, and the construction method comprises the following steps: S1, selecting raw materials: fly ash, slag powder, carbide slag powder, desulfurized gypsum powder, gasified slag powder, coal gangue powder, steel slag powder, tailing powder, coal cinder powder, building solid waste powder and municipal waste powder; s2, raw material pretreatment; s3, preparing a composite exciting agent: preparing sodium sulfate, calcium hydroxide, calcium chloride, calcium sulfate, sodium silicate and sodium hydroxide; s4, preparing a composite exciting agent solution; s5, preparing a multi-element solid waste-based cementing material: uniformly mixing the raw materials pretreated in the step S2 with the composite activator prepared in the step S4 according to a ratio; s6, roadbed laying, wherein a sodium bentonite waterproof blanket is laid on the bottom layer of the roadbed and then laid; s7, geogrids are laid; s8, maintenance is conducted; through fine selection and proportioning of the raw materials, efficient resource utilization of various industrial solid wastes is realized.

The invention relates to a catalyst for photo-thermal CO2 methanation reaction, a preparation method of the catalyst and a methane preparation method, and the catalyst is a single-layer CoB hydroxide nanosheet. The catalyst is a single-layer CoB hydroxide nanosheet formed after a CoB catalyst is subjected to hydroxide oxidation. And the electron-deficient boron is proved to promote the generation of CH4 in the CO2 methanation reaction. Meanwhile, the energy source of the reaction completely comes from a xenon lamp light source, and the photo-thermal CO2 hydrogenation reaction is effectively realized through photochemical-thermochemical conversion. The surface of the catalyst is irradiated through a xenon lamp, the high temperature of about 330 DEG C can be achieved, and under the condition, the yield of CH4 can reach 181.5 mmol g <-1 > h <-1 > through CO2 methanation. And meanwhile, a considerable reaction yield can be achieved under an outdoor simulation condition. According to the method, energy completely comes from sunlight, and an effective solution is provided for CO2 resource utilization.

The invention discloses a preparation method for producing a biological bacterial fertilizer from lincomycin waste mushroom dregs, and relates to the technical field of fertilizer preparation, and the preparation method comprises the following steps: pretreatment of lincomycin waste mushroom dregs, microbial inoculation, strain fermentation, trace element addition and liquid fertilizer finished product detection. The method has the advantages that the waste lincomycin residues are alternately soaked with diluted hydrochloric acid and a sodium hydroxide solution, various impurities on the surfaces and in the waste lincomycin residues can be fully dissolved, alkaline harmful substances and pollutants combined with metal ions can be decomposed under the acidic condition, and the waste lincomycin residues can be recycled under the alkaline condition. The micro-bubbles can decompose acidic residual antibiotics and organic substances, in the continuous aeration process, on one hand, the micro-bubbles can scour the surfaces of mushroom dregs to enable impurities to fall off and be dissolved more easily, on the other hand, the content of dissolved oxygen in liquid is increased, favorable conditions are created for follow-up microorganism survival, and meanwhile oxidative decomposition of harmful substances is facilitated.

The present invention discloses a device and a method for using carbon material to promote methane production. The device includes a device body, a stirring assembly, a screening assembly and a monitoring assembly. The device body includes a shell, and an upper cover plate is installed on the shell; the stirring assembly includes a stirring shaft, and the stirring shaft is rotatably connected to the upper cover plate. The lower end of the stirring shaft is placed in the shell, and the stirring shaft is placed on the side wall of the shell with multiple installation shells installed. A carbon material containing box is installed in each of the multiple installation shells, and a plurality of screens are installed in the carbon material containing box, and the carbon material containing box is loaded with carbon material. The present invention improves the efficiency of anaerobic sludge in producing methane by shortening the anaerobic sludge cycle, so as to improve the recovery rate of energy in the sludge, realize the efficient resource utilization of the sludge, and has good environmental and economic benefits. At the same time, the process cost of its methane production is low, the equipment is practical, and it is easy to promote.

The invention relates to the technical field of waste resource utilization, and discloses a coupling type system and method for preparing copper powder through kitchen waste gasification-hydro-thermal synthesis, and a coupling reaction device in the system comprises a supercritical water gasification module and a supercritical hydro-thermal synthesis module which are sequentially arranged in a sleeving mode from outside to inside; a palladium membrane is arranged between the supercritical water gasification module and the supercritical hydrothermal synthesis module; the outer side wall of the supercritical water gasification module is coated with a heating unit; according to the invention, a supercritical water gasification reactor and a supercritical hydrothermal synthesis reactor are integrated together through a sleeve structure; pure hydrogen is separated from gasification products in the supercritical water gasification module through a palladium membrane, an expensive chemical reducing agent is replaced, effective utilization of kitchen waste slurry is effectively improved, and the utilization rate of conversion from waste to resources is achieved. And meanwhile, pure hydrogen is separated by using a palladium membrane and enters a supercritical hydrothermal synthesis module, so that introduction of impurities is avoided, and preparation of high-purity superfine copper powder can be realized.

The invention relates to a renewable energy technology, in particular to a catalyst applied to a preparation method of biological ship fuel, and the catalyst is a sulfonated carbon catalyst. The sulfonated carbon catalyst is prepared by the following steps: S1, soaking biodiesel waste in n-hexane, standing overnight, and dissolving grease; s2, filtering the dissolved biodiesel waste to obtain an oil-solvent mixture and residues; s3, separating and recovering the solvent and oil from the oil-solvent mixture through a rotary evaporator, and pyrolyzing residues in a tubular rotating bed reactor to obtain a carbonized product and pyrolysis gas; and S4, mixing the carbonized product with concentrated sulfuric acid for reaction to generate the sulfonated carbon catalyst. According to the method, efficient resource utilization of waste is achieved, the produced recycled oil is used for preparing the biological ship fuel, a high-performance catalyst with high adaptability is provided for sustainable biological ship fuel production, the cost is low, the conversion efficiency is high, and the economic benefit is good.

The invention discloses a method for preparing a road base material by using incineration slag and polluted sludge, which comprises the following steps: carrying out wet tempering and chemical modification on the incineration slag to obtain activated incineration slag; treating the solid-phase sludge by using low-temperature plasma to obtain pretreated sludge; uniformly mixing the activated incineration slag and the pretreated sludge to obtain a mixed raw material; adding a mineralizer into the mixed raw material, uniformly mixing, and adding water to obtain a reaction wet material; performing hydrothermal reaction on the reaction wet material to obtain a mineralized material; and uniformly mixing the mineralized material with the water glass solution to obtain the road base material. According to the method, heavy metals in the incineration slag and the polluted sludge are promoted to react with the mineralizing agent under the hydrothermal treatment condition, so that the heavy metals are solidified and stabilized, and the long-term leaching risk of the heavy metals in the roadbed and the mobility of the heavy metals in the environment are effectively reduced. Meanwhile, a thermodynamically stable mineral phase is generated by hydrothermal treatment, so that the strength, durability and compression resistance of the roadbed material are remarkably enhanced.

The invention discloses a preparation method and application of a magnetic rectorite / water bloom algae mud / river and lake bottom mud composite biochar material. The preparation method comprises the following steps: mixing pretreated rectorite, water bloom algae mud and river and lake bottom mud in proportion to obtain powder, soaking the powder in an iron modifier solution, fully stirring, carrying out suction filtration, drying, placing the mixture in a tubular furnace, carbonizing under the protection of argon, and cooling to room temperature, so as to obtain the rectorite / water bloom algae mud / river and lake bottom mud composite material. The magnetic rectorite / water bloom algae mud / river and lake bottom mud composite biochar material is obtained. The composite biochar material is prepared from natural clay mineral rectorite, lake water bloom algae mud and river and lake bottom mud, is wide in source and low in cost, has a good adsorption effect on different types of pollutants such as tetracycline (TC), lead ions (Pb < 2 + >) and phosphorus (P) in an aqueous solution, has a practical application prospect, and is suitable for industrial production. And meanwhile, a new strategy is provided for resource utilization of solid wastes.

The application discloses a shrimp head hydrolysate with anti-freezing activity and a preparation method and application thereof, and belongs to the technical field of biology. The shrimp head is treated by fermentation with the aid of a magnetic field and Pediococcus pentosaceus, and a shrimp head hydrolysate with high anti-freezing effect is prepared. Six polypeptides with high anti-freezing activity are identified from the shrimp head hydrolysate through mass spectrometry analysis. The polypeptides have high ice recrystallization inhibition activity, can inhibit the formation of ice crystals and the migration of water during the food freezing process, reduce the mechanical damage of ice crystals to food, inhibit the protein denaturation caused by ice crystals, and can also reduce the thawing loss and cooking loss of food, and has great application value in food frozen storage.

The invention discloses a community household kitchen garbage centralized recovery and timely full-amount pretreatment device linked with biomass utilization. Comprising a frame, a feeding hopper, a flow dividing component, two stirring barrels, a cleaning assembly, two stirrers installed in the stirring barrels, a supporting plate, two stirring core lifting components, a discharging hopper, a hard bone collecting drawer, a hard bone sorting transmission assembly, a hard bone sorting driving assembly and a shell. The kitchen garbage pre-pulping device can be used in all weathers, kitchen garbage which can be produced every day in families but is small in daily production amount is recycled in a centralized mode and is subjected to pre-pulping treatment, and in the pre-pulping process, food residues are crushed, and organic matter remaining on hard bones is stripped; and meanwhile, by controlling the solid size in the kitchen waste slurry, large hard bones which can cause damage to biomass by utilizing subsequent treatment equipment are separated and independently recycled, and the kitchen waste slurry without the large hard bones flows into a slurry temporary storage pool, so that centralized recycling, timely treatment and full-amount resource utilization of the household kitchen waste are realized.

The invention relates to a cyclic preparation method of a spirolactone key material, and belongs to the technical field of medicines. According to the method, resource utilization is carried out on a byproduct compound 2 generated in the production process of a spirolactone intermediate 1, and the byproduct compound 2 is converted into a spirolactone key material compound 1 under the acidic condition. The reaction is carried out in an organic solvent or an aqueous medium, the acidic aqueous solution is selected from hydrochloric acid, sulfuric acid, trifluoroacetic acid, acetic acid, nitric acid or phosphoric acid, the concentration range is 0.1-6 mol / L, the reaction temperature is 0-100 DEG C, the reaction time is 0.5-96 hours, and the feeding molar ratio of the compound 2 to the acid is 1: 0.5-1: 10. The organic solvent can be selected from ethers, alcohols, esters or haloalkanes. The obtained compound 1 can be used as a raw material for preparing spirolactone, and a final product is obtained through an oxygen bridge reaction, an esterification reaction, a decarboxylation reaction, an etherification reaction, a dehydrogenation reaction and a thioation reaction. The method provided by the invention realizes cyclic utilization of production byproducts, improves the utilization rate of raw materials, reduces the production cost, reduces waste discharge, and has a good industrial application prospect.

The invention discloses a resource-based comprehensive utilization treatment process for municipal sludge. The process comprises the following steps: firstly, starch nano-microspheres are added into the municipal sludge, and ultrasonic oscillation treatment is performed under magnetic field conditions to obtain pre-treated sludge; then, oxygen is injected into the pre-treated sludge, high-pressure spraying is performed, and microwave activation is performed to obtain activated sludge; then, Chlorella is inoculated into the activated sludge, cultured, ultrasonic oscillation treated, and solid-liquid separation is performed to obtain a water phase and a solid phase, the water phase is reused as industrial water, and the solid phase is carbonized to prepare activated carbon, thereby realizing resource-based comprehensive utilization of the municipal sludge.

The invention discloses solid waste aggregate anti-freezing concrete and a preparation method thereof, and belongs to the technical field of concrete. The anti-freezing concrete is prepared from the following components in parts by weight: 170 to 340 parts of ordinary Portland cement, 40 to 120 parts of fly ash, 40 to 170 parts of mineral powder, 10 to 40 parts of vanadium-titanium slag powder, 900 to 1100 parts of coarse aggregate, 800 to 1000 parts of sand, 160 to 180 parts of water and 3 to 20 parts of additive, wherein the coarse aggregate comprises common coarse aggregate and enhanced waste ceramic aggregate; the sand comprises common machine-made sand and enhanced nickel slag sand; the waste ceramic aggregate and the nickel slag sand are respectively soaked in an aqueous solution of a reinforcing agent in advance for reinforcing treatment. The obtained anti-freezing concrete has good mechanical performance and anti-freezing performance, the mixing amount of solid waste materials is high, efficient resource utilization of the solid waste materials is achieved, consumption of natural aggregate is reduced, and the anti-freezing concrete is environmentally friendly and has important application prospects.

The application relates to the technical field of computer networks, in particular to a scheduling method and device based on CNN matrix blocking, equipment and a storage medium, the method comprising the following steps: receiving at least one computing task of a CNN neural network submitted by a user, determining the priority of each computing task while responding to each computing task according to a preset job priority ordering mode; generating a task publishing request according to the idle resources of one or more FPGA board cards and the receiving condition of the published tasks, responding to the task publishing request according to a preset data dependency relationship and a preset job priority ordering; based on the published computing tasks to be received, performing matrix blocking through a preset FPGA resource scheduling algorithm, allocating corresponding FPGA resources, and deploying the FPGA resources to one or more FPGA board cards to perform parallel computing on the published computing tasks to be received. Therefore, the problems that the optimal acceleration effect cannot be achieved in the related art and FPGA resources are easily wasted are solved.

The application discloses a device for centralized collection and timely and full-amount pretreatment of household kitchen garbage in a community for biomass utilization, which comprises a frame, an inlet hopper, a shunting component, two stirring barrels, a cleaning assembly, two stirrers arranged in the stirring barrels, a supporting plate, two stirring core lifting components, an outlet hopper, a hard bone collection drawer, a hard bone sorting transmission assembly, a hard bone sorting driving assembly and an outer shell. The device can be used all day long, and can collect and pretreat the daily household kitchen garbage with small daily amount. In the pretreatment process, food residues are crushed, and organic matters on hard bones are stripped. Meanwhile, large hard bones which can cause damage to subsequent processing equipment for biomass utilization are separated and collected by controlling the solid size in the kitchen garbage slurry. After the large hard bones are removed, the kitchen garbage slurry flows into a slurry temporary storage pool, so that the centralized collection, timely treatment and full-amount resource utilization of household kitchen garbage are realized.

The application provides a steel dust and organic solid waste low-carbon synergic treatment melting furnace, which comprises a feeding unit, an iron bath pyrolysis unit and a recovery unit which are sequentially communicated; the iron bath pyrolysis unit comprises a furnace body containing molten iron and an oxygen delivery assembly communicated with an upper cavity in the furnace body; the feeding unit comprises a steel dust injection assembly, an organic solid waste injection assembly and an organic solid waste feeding opening arranged on the top of the furnace body and communicated with the furnace body; and the recovery unit comprises a flue gas recovery assembly communicated with an exhaust opening arranged on the shoulder of the furnace body. Through the above manner, the melting furnace can not only treat different types of organic solid waste and improve the utilization efficiency, but also treat the steel dust by using the organic solid waste, so that molten iron, dust rich in volatile metal elements and high-calorific-value synthetic gas rich in CO and H2 are produced, the reaction rate is fast, the product quality is high, and the efficient resource utilization of the organic solid waste and the steel dust is realized.

The invention relates to the technical field of resource utilization of household garbage and municipal sludge, in particular to a method for preparing powdered activated carbon from household garbage, which comprises the following steps of: firstly, preparing sludge garbage particles by using the household garbage and the municipal sludge as raw materials; then, pyrolyzing and carbonizing the sludge garbage particles in an organic solid waste multifunctional pyrolyzing and carbonizing furnace to obtain activated carbon; then, the activated carbon is crushed and floated, and a high-quality activated carbon suspension is obtained; and finally, carrying out spray drying on the high-quality activated carbon suspension to obtain powdery activated carbon. The powdery activated carbon is prepared from the household garbage and the municipal sludge, the municipal sludge does not need to be dried in advance, the preparation technology for preparing the activated carbon from the household garbage is simplified, the production cost of the activated carbon is remarkably reduced, efficient resource utilization of the household garbage and the municipal sludge is achieved, and the method has the advantages of saving resources, protecting the environment and improving the economic benefits. The method has important economic benefits and environmental benefits.

This invention provides a coffee pericarp enzyme, its specific compound fermentation agent, and a preparation method, belonging to the field of enzyme production technology. The preparation method of the coffee pericarp enzyme of this invention includes the following steps: mixing coffee pericarp powder with sacha inophyllum pomace saccharides, and sequentially subjecting the mixture to fermentation with *Saccharomyces cerevisiae* YNXC003 and anaerobic fermentation with *Bifidobacterium bifidum* YNXC004 to obtain the coffee pericarp enzyme. This invention uses coffee pericarp powder and sacha inophyllum pomace saccharides as compound raw materials, combined with a specific fermentation agent, and employs a segmented fermentation mode. This not only fully releases the nutritional activity of the two raw materials, significantly improving the nutritional level and flavor of the enzyme, but also endows the enzyme with physiological functions such as lowering blood sugar. The total acid content of the coffee pericarp enzyme of this invention is 8-12 g / L, the total phenol content is 1.5-2.5 g / L, and it is rich in short-chain fatty acids, polyphenolic compounds, amino acids, and other bioactive substances, exhibiting significant blood sugar lowering effects.

The invention relates to a method for preparing low-iron quartz sand and high-quality feldspar from lepidolite tailings. The method is characterized by comprising the following steps: (1) grinding pegmatite type lepidolite tailings, and screening to obtain mineral particles with the particle size of less than or equal to 0.35 mm; (2) sequentially carrying out medium magnetic separation, high-intensity magnetic separation and high-intensity magnetic separation on the-0.35 mm minerals to obtain magnetic separation fine sand and magnetic separation tailings; (3) scrubbing the magnetic separation fine sand to obtain desliming fine sand with higher purity; (4) the desliming fine sand is subjected to three-section flotation, the ore pulp concentration of first-section flotation is 35%-40%, H2SO4 serves as a pH adjusting agent, the pH is adjusted to 2-5, and mixed amine serves as a collecting agent of 0.10-0.15 kg / t; the ore pulp concentration of the second-stage flotation is 25%-30%, H2SO4 is used as a pH regulator, the pH is regulated to be 1-3, and an anion and cation collecting agent is 0.10-0.15 kg / t; the ore pulp concentration of the third-section flotation is 25%-30%, H2SO4 is used as a pH regulator, the pH is regulated to 1-3, the use amount of an anion and cation collecting agent is 1.25-2.25 kg / t, and feldspar and quartz fine sand are obtained. The method has the advantages that the prepared quartz fine sand meets the index requirements of quartz for optical glass or photovoltaic glass, and meanwhile, feldspar products for high-whiteness glaze and feldspar products for float glass are obtained.

The present invention discloses a clay-based magnesium recycled aggregate concrete for 3D printing and a manufacturing method thereof, wherein the 3D printing clay-based magnesium recycled aggregate concrete comprises the following raw materials by weight: 68 to 95 parts of 3D printing mortar, 5 to 32 parts of clay-based magnesium recycled aggregate for 3D printing; the 3D printing clay-based magnesium recycled aggregate comprises the following raw materials by weight: 63.9 to 80.8 parts of clay base material, 19.2 to 36.1 parts of magnesium cementitious material. The present invention adopts clay-based magnesium recycled aggregate for 3D printing, the clay base material used is cheap and easy to obtain, and the extrusion molding technology is used to efficiently utilize the municipal sludge slurry waste, which not only realizes the low-cost large-scale production of coarse aggregate for 3D printing, but also effectively improves the resource utilization rate and added value of recycled aggregate, and reduces the cost of 3D printing engineering construction materials.

The invention discloses a preparation method and application of a chromium-doped fullerene C20 catalyst. According to the invention, fullerene C20 is used as a carrier, chromium atoms are efficiently introduced into a carbon cage structure of fullerene C20 through chemical doping, and a stable active center with a strong electron coupling effect is successfully constructed. The method specifically comprises the following steps: dispersing fullerene C20 in toluene, carrying out ultrasonic treatment, adding chromium trichloride, carrying out a doping reaction under nitrogen protection, and carrying out centrifugation, washing and drying to obtain the target catalyst. The catalyst shows excellent performance in the reaction of catalyzing carbon dioxide hydrogenation to prepare formic acid, under the mild condition, the highest carbon dioxide conversion rate can reach 90.2%, the highest formic acid yield can reach 92.6%, and the catalytic activity retention rate is still 91.7% or above after the catalyst is recycled five times. The process is simple, the prepared catalyst has the advantages of high activity, high selectivity and high stability, and a new material is provided for efficient resource utilization of carbon dioxide.

The invention discloses an iron-containing binder for metallurgical pellet preparation and a preparation method of the iron-containing binder, and belongs to the technical field of metallurgy. The iron-containing binder comprises the following components: 20-50% of cobalt smelting waste residue and 50-80% of bentonite. The preparation method of the iron-containing binder comprises the following steps: step 1, weighing the bentonite, and adding water to prepare a turbid liquid; 2, cobalt smelting waste residues are added into the turbid liquid, sufficient stirring is conducted, and standing is conducted for a period of time; and 3, carrying out separation and purification by using a centrifugal machine, compacting the purified solid matter, extruding by using a screw extruder, and loading into a sample bag for aging after the extrusion is completed. 4, after aging is completed, drying, smashing and sieving are conducted, and then the iron-containing binder is obtained, the binder is good in binding performance and few in residue, when the binder is used for iron ore pellet preparation, the strength of roasted pellets and the iron grade of pellet ore can be remarkably improved, the iron-making economic benefits are improved, and volume reduction, harmless and resourceful treatment of cobalt smelting waste residues is achieved.

The invention belongs to the technical field of livestock and poultry manure management and utilization, and provides a method for realizing emission reduction synergy of production of padding, greenhouse gas and active nitrogen gas through rapid and safe fermentation of cow dung residues under a cold condition, and a heating plate is arranged at the bottom of a pile body to realize heating of cold air output from an aeration pipe at the bottom; and in combination with the ascending flow of the air flow in the pile body, the whole large pile body at the upper part can be effectively heated, and the high-temperature period lasts until the fermentation is finished, so that a good fermentation effect is achieved. Start-stop feedback control of the heating plate is realized by monitoring the temperature of the pile body, so that the energy consumption is effectively reduced, and the cost is greatly reduced. The method has the synergistic effects of promoting efficient and safe fermentation of excrement to produce padding and reducing emission of harmful gases in the environment under the cold condition in winter, is simple to operate, realizes efficient value-added utilization of wastes, and has important value and significance for solving the practical problems of excrement treatment and resource utilization in dairy farms.

The embodiment of the invention provides a method for preparing an insulating brick based on gasification coarse slag, and relates to the technical field of insulating brick preparation. Ning coal coarse slag and sludge are used; the heat-insulating brick is prepared from the raw materials including the bentonite and the pore-forming agent, and the prepared heat-insulating brick is relatively high in compressive strength, relatively low in heat conductivity and volume density and relatively good in heat-insulating effect. The method comprises the following steps: S1, taking coarse slag and sludge in a ratio of 5: 1 as main raw materials; s2, weighing a pore-forming agent according to 5% of the main raw material, and weighing bentonite accounting for 15%-18% of the total mass of the main raw material and the pore-forming agent as a binder; s3, fully and uniformly mixing the weighed raw materials, and aging in a sealed environment for 24 hours; s4, pouring the aged raw material into a mortar, adding a 1mol / L NaOH solution which accounts for 13-15% of the total mass, and stirring to form a pressed raw material; s5, the pressed raw materials are placed in a mold to be pressed and formed; s6, drying the formed semi-finished product in a drying oven for 12 hours; and S7, the dried bricks are placed in a muffle furnace to be sintered to prepare the heat preservation bricks, reduction and resource utilization of the gasified slag are achieved, and the bricks with the good heat preservation performance are prepared.

This invention discloses a method for resource recycling based on metal extraction from spent lithium-ion batteries, belonging to the field of electrocatalysis technology. The method includes the following steps: disassembling spent lithium-ion batteries and collecting cathode powder; mixing the cathode powder, distilled water, and a weak acid evenly; subjecting the resulting mixture to water bath heating and ultrasonic treatment to obtain a metal ion leaching solution; mixing the metal ion leaching solution with urea and ammonium persulfate, and transferring it to a reaction vessel containing a current collector for hydrothermal reaction, thereby growing an electrocatalytic electrode in situ on the surface of the current collector; wherein the current collector is a copper oxide nanowire loaded on a copper foam substrate. This approach eliminates the long process and high pollution steps of traditional metallurgy, upgrading low-value solid waste into high-value-added electrocatalytic materials, providing a new approach for the green closed-loop recycling of lithium-ion batteries and the low-cost manufacturing of electrocatalytic electrodes.

The invention discloses application of spartina alterniflora straw, and particularly relates to application of the spartina alterniflora straw as feed for tenebrio molitor larvae after the spartina alterniflora straw is crushed. Tenebrio molitor larvae fed with spartina alterniflora straw can be used as live initial feed for feeding carnivorous economic fish fries such as ricefield eels, perches, mandarin fishes and snakeheads. According to the application of the spartina alterniflora straw provided by the invention, compared with tenebrio molitor larvae obtained by traditional wheat bran culture, the nutrition ingredients are not lost, and meanwhile, the culture cost of the tenebrio molitor is greatly saved. After the bred tenebrio molitor larvae are used as live initial feed, the initial feeding desire of the monopterus albus fries is obviously improved, and then the growth performance of the monopterus albus fries is enhanced.