401 results about "Vermiculite" patented technology

The invention discloses a preparation process of a soil conditioner and application of the soil conditioner in soil improvement, and the preparation process comprises the following steps: S1, preparation of pretreated biomass; s2, preparation of composite biochar; s3, preparation of sulfhydrylated biochar; s4, preparing the modified composite biochar; and S5, uniformly mixing the modified composite charcoal, kaolin, humic acid, fly ash, slaked lime and vermiculite to obtain the soil conditioner. According to the soil conditioner, modified composite biochar prepared through specific functionalization is blended with kaolin, humic acid, fly ash, slaked lime and vermiculite according to a certain proportion, and the prepared soil conditioner has unique advantages in the aspects of improving soil organic matter, fixing carbon, providing microelements and especially regulating and controlling the activity of soil microorganisms; advanced complementation and synergistic interaction of all the components are achieved, and the comprehensive treatment requirement of complex degraded soil can be better met.

The invention provides a salt-tolerant plant constructed wetland system for treating eutrophicated mariculture wastewater, which specifically comprises a lower filler formed by mineral materials, and a middle filler formed by modified zeolite, sodium alginate coated vermiculite, rice husk charcoal, oyster shell, coral sand and diatomite, the surface filler is composed of intertidal zone bottom mud, intertidal zone raw water, coastal saline-alkali soil and composite algae powder, and the three fillers are combined with salt-tolerant plant breeding, bow-shaped water flow optimization and layered collaborative design; the core problems of poor salt tolerance, low adsorption efficiency, easiness in blockage, high maintenance cost and the like of the traditional constructed wetland during treatment of the mariculture wastewater are systematically solved.

The invention relates to the technical field of soilless culture substrates, in particular to a soilless culture substrate based on biochar and mushroom dreg resource utilization and a preparation method and application of the soilless culture substrate. The soilless culture substrate comprises the following raw materials in parts by mass: 30-50 parts of mushroom dregs, 20-30 parts of charcoal, 10-15 parts of vermiculite, 8-12 parts of perlite, 5-10 parts of humic acid and 2-5 parts of trace elements. The soilless culture substrate can effectively utilize biochar and mushroom dreg resources, provides a good physical environment and sufficient nutrient supply for plant growth, improves the stress resistance and yield quality of plants, reduces dependence on traditional non-renewable substrate resources, and reduces the pressure of agricultural wastes on the environment.

The invention provides a special cow dung organic fertilizer for saline-alkali soil and a preparation method thereof, and the preparation method specifically comprises the following steps: 1, carrying out mixed fermentation on a cow dung substrate and compound bacterial powder, 2, adding modified charcoal and salt-tolerant bacterial powder, mixing and decomposing, 3, mixing and granulating with desulfurized gypsum-vermiculite-quartz sand micro-powder, humus soil and trace elements, and 4, carrying out granulation on the granules to obtain the special cow dung organic fertilizer for saline-alkali soil. The special cow dung organic fertilizer for saline-alkali soil is obtained; through a multi-strain synergistic fermentation process, modified functional material compounding and stage temperature-controlled decomposition, the defects of an existing saline-alkali soil modifier in the aspects of microbial activity, nutrient release efficiency, soil structure remediation and the like are overcome.

The invention relates to the technical field of concrete preparation, in particular to sprayed concrete with high crack resistance and low rebound rate and a preparation method thereof. The nano aerogel, the polypropylene fiber and the modified vermiculite are creatively adopted to prepare the sprayed concrete, and the nano aerogel has the water retention and moisture absorption characteristics and plays an internal curing role in the concrete, so that the internal water loss rate is reduced, the shrinkage of the concrete is weakened, and the concrete is prevented from being damaged. Meanwhile, the polypropylene crude fiber with high breaking strength and elasticity modulus and a composite cross-linked network structure formed by the polypropylene crude fiber and the modified vermiculite can greatly improve the crack resistance and durability of the sprayed concrete under the interaction; furthermore, when the concrete is cracked, the modified liquid flows out of the inner cavity of the vermiculite and is adhered and cured at the crack to realize a self-repairing effect, so that the structural deformation of the tunnel can be better limited, and the service life of the tunnel lining in a complex environment is prolonged.

The invention relates to the technical field of single PE eleven-layer composite structure thin film material research and development, and discloses an eleven-layer ultrahigh-barrier polyethylene low-carbon environment-friendly film material and a preparation method thereof.The preparation method comprises the steps that a DOPO-based silane coupling agent is synthesized, the surface of sodium-based vermiculite is modified with the DOPO-based silane coupling agent to obtain flame-retardant modified vermiculite, and the flame-retardant modified vermiculite is modified with the DOPO-based silane coupling agent to obtain the eleven-layer ultrahigh-barrier polyethylene low-carbon environment-friendly film material. And the flame-retardant modified vermiculite is uniformly dispersed in an ethylene-vinyl alcohol copolymer matrix to prepare the flame-retardant barrier material. A flame-retardant barrier material is introduced into a PE co-extrusion film, and an eleven-layer co-extrusion blow molding film forming process is adopted to prepare an eleven-layer composite structure film which is made of a single PE material and has the thickness of 50-200 microns. The invention provides a preparation method of a single PE material eleven-layer composite structure thin film, and an eleven-layer thin film single product is prepared, has excellent barrier performance, belongs to ultrahigh barrier materials, and can be used as an optimal alternative selection in the field of dairy product packaging.

The invention belongs to the technical field of PVC auxiliaries, and particularly relates to a compounding method of a PVC environment-friendly stabilizer, which comprises the following steps: cleaning expanded vermiculite, sequentially depositing titanium dioxide and calcium-zinc ions, then obtaining calcium-zinc stearate modified expanded vermiculite through a spraying reaction of sodium stearate, and finally mixing with an antioxidant, a lubricant, an auxiliary stabilizer and an ultraviolet absorbent to obtain the PVC environment-friendly stabilizer. The PVC environment-friendly stabilizer is obtained. The defects of an existing stabilizer are overcome, the porous structure of expanded vermiculite is used as a frame, zinc stearate and calcium stearate are fixed to the surface in an in-situ fixing mode, and the zinc stearate and calcium stearate composite stabilizer has the advantages of being not prone to precipitation and good in stabilizing effect.

The invention relates to the technical field of soil remediation and fertilizer preparation, and discloses a soil remediation fertilizer and a preparation method thereof.The soil remediation fertilizer is formed by compounding a pre-fermented organic matrix and a function activation component, and the organic matrix comprises chicken manure, corn straw, fermented sesame cake powder and traditional Chinese medicine residue powder; a stable organic fertilizer matrix is obtained through high-temperature composting fermentation; the function activation component comprises freeze-dried saccharomyces cerevisiae embedded by chitosan-baking soda, a pineapple peel crude extract, polyglutamic acid, yeast cell walls, fulvic acid, trace mineral substances, microporous vermiculite and the like. After the fertilizer is applied into soil, the embedded flora and the slow-release carbon source are activated through soil moisture and an acid-base environment, the rhizosphere in-situ re-fermentation process is triggered, and the synergistic remediation function of continuous nutrient release, micro-ecological regulation and soil structure improvement is achieved. The product provided by the invention has the advantages of composite structure, synergistic function, controllable activation condition, good ecological adaptability and popularization value.

The present invention provides a novel saline-alkali land conditioner, comprising agricultural waste, pine needle soil, vermiculite, leaf mold, chlorella, bone meal, and EM bacterial agent, and the present invention relates to a green soil conditioner with innovative significance. The conditioner has a unique formula, and the raw materials are not only natural and environmentally friendly, but also easy to obtain. The advantage is that it can improve soil quality from multiple angles simultaneously, including adjusting pH value, increasing fertility, optimizing soil structure, improving water retention and permeability, and improving microbial environment.

The invention relates to the technical field of building materials, in particular to a cementing material for a fabricated wall prepared from multi-element solid waste and a preparation method of the cementing material. The preparation method comprises the following steps: 25-55 parts of fly ash, 25-65 parts of blast furnace slag, 8-10 parts of lime, 1-5 parts of desulfurized gypsum, 3-6 parts of a first mixture, 2-5 parts of a second mixture and 5-8 parts of an alkali activator; the mass ratio of the metakaolin to the bentonite to the superfine calcium carbonate in the first mixture is 3: 2: 1; the mass ratio of the vermiculite to the expanded perlite to the glass beads in the second mixture is 2: 2: 1. Through the synergistic excitation effect of Ca < 2 + > and Na < + > and the addition of the first mixture and the second mixture, the cementing material forms a more stable microstructure. A hydration product SEM figure shows that C-S-H and C (N)-A-S-H gel are symbiotic to form a three-dimensional network, pores are filled with needle-like ettringite crystals, and in combination with the brucite phase anchoring effect, the mechanical properties, such as strength and durability, of the material are remarkably improved.

The invention discloses organic nutrient soil and a manufacturing method thereof.The organic nutrient soil is prepared from, by weight, 25-30 parts of leaf mold, 20-25 parts of peat soil, 12-15 parts of perlite, 10-12 parts of vermiculite, 20-25 parts of organic fertilizer and 3-5 parts of biological inoculant.The organic nutrient soil contains abundant organic matter, nitrogen, phosphorus, potassium and other macroelements and multiple medium trace elements, the biological inoculants are added at the same time, and the organic nutrient soil has the advantages that the organic nutrient soil is rich in organic matter, nitrogen, phosphorus, potassium and other macroelements; the nutrient requirements of different plant growth stages can be met, healthy and strong growth of plants is promoted, and the stress resistance and quality of the plants are improved; by reasonably matching the raw materials such as the leaf mold, the peat soil, the perlite and the vermiculite, the nutrient soil has good air permeability, water drainage, water retention and looseness, soil hardening is effectively prevented, and a suitable growth environment is provided for plant roots; the manufacturing method is simple, is simple in process, is convenient to operate, does not need complex equipment and technologies, and is easy for large-scale production, popularization and application.

The invention relates to the technical field of vermiculite board production, in particular to full-automatic high-pressure vermiculite board forming equipment and a production method. The full-automatic high-pressure vermiculite board forming equipment comprises a hydraulic machine provided with a workbench, a middle lifting frame and a lifting seat, and further comprises a mold, the lower die base is installed on the upper table top of the workbench, the die frame is installed on the inner side of the middle lifting frame, and the upper die base is installed on the bottom face of the lifting base. The feeding and discharging device is provided with a supporting table with supporting legs, a feeding box with openings in the upper portion and the lower portion, a pushing frame and a driving mechanism, and the feeding box is located on the upper table top of the supporting table; the driving mechanism comprises two groups of elastic telescopic push rods correspondingly connected with the feeding box and the pushing frame respectively, and linear driving equipment for synchronously applying force to the two groups of elastic telescopic push rods; by means of the feeding and discharging device, full-automatic operation from raw material filling to finished product taking is achieved, the requirement for manual intervention is greatly reduced, the production period is shortened, and the operation efficiency of the whole production line is improved.

The invention discloses an air purification composition capable of generating negative oxygen ions. The air purification composition is prepared from the following raw materials in parts by weight: 800 to 1000 parts of pine needle extract powder, 87 to 107 parts of cacumen biotae extract powder, 58 to 68 parts of perilla frutescens extract powder, 58 to 68 parts of lucky tree extract powder, 58 to 68 parts of cactus extract powder, 58 to 68 parts of ampelopsis grossedentata leaf extract powder, 25 to 40 parts of biotite powder and 170 to 230 parts of expanded vermiculite powder. The attapulgite-sepiolite-rectorite composite material is prepared from the following components in parts by weight: 170 to 230 parts of attapulgite powder, 170 to 230 parts of sepiolite powder, 170 to 230 parts of rectorite powder and 30 to 40 parts of vinasse powder; the negative oxygen ion generator can effectively release negative oxygen ions, has the advantages of being environmentally friendly, safe, healthy and the like, can decompose indoor pollutants such as formaldehyde and ammonia, and plays an important role in purifying the indoor environment and reducing pollution.

The invention provides a biological organic fertilizer and a preparation method thereof. The biological organic fertilizer is prepared from the following raw materials in parts by weight: 10 to 15 parts of rice husk, 8 to 12 parts of peanut shell, 10 to 15 parts of bagasse, 15 to 20 parts of straw, 20 to 25 parts of livestock manure, 5 to 10 parts of pond sludge, 3 to 5 parts of plant ash, 5 to 10 parts of oil meal, 5 to 10 parts of ammonium phosphate, 2 to 5 parts of low-temperature complex microbial inoculants, 3 to 6 parts of seaweed oligosaccharide, 5 to 10 parts of modified vermiculite powder and 10 to 20 parts of photothermal conversion microspheres. According to the invention, waste is taken as a basic raw material and is matched with ammonium phosphate to rapidly supplement available nutrients, and meanwhile, the low-temperature complex microbial inoculant, the modified vermiculite powder and the photothermal conversion microspheres are introduced to form a synergistic interaction system. Vermiculite powder is modified, so that the nutrient adsorption and slow release capability is improved, a carbon source and low-temperature protection are provided for microorganisms, and the cell membrane stability is enhanced. The photothermal conversion microspheres efficiently absorb sunlight and convert the sunlight into heat energy, a local and mild heat island effect is formed around the fungicide, the microenvironment temperature is increased, breeding of the fungicide is remarkably accelerated, and therefore organic matter decomposition and nitrogen conversion are accelerated.

The invention discloses a preparation method of a two-dimensional layered vermiculite mineral-based nano confinement material and application of the two-dimensional layered vermiculite mineral-based nano confinement material in catalytic degradation of antibiotic pollutants. According to the method, vermiculite minerals, rhodochrosite minerals, tourmaline minerals and sulfur minerals serve as raw materials, the two-dimensional layered vermiculite mineral-based nano confinement mineral material is prepared to serve as a catalyst, persulfate is activated to catalytically degrade antibiotics, the problem of agglomeration of the nano mineral material can be effectively solved, and high degradation efficiency and mineralization rate are achieved. The catalyst is in a nanoscale, and provides a constrained environment for a catalytic reaction system, so that accurate regulation and control of catalytic performance are realized, the efficiency of catalytic reaction is improved, and the problem of low efficiency of catalytic degradation of antibiotics by a current commercially available catalyst is solved. The preparation method is simple, the raw materials are cheap and easy to obtain, and the preparation method is green and environment-friendly and can be industrially applied on a large scale.

This invention proposes a near-earth-colored soil matrix based on coal gangue and its preparation method. The preparation method comprises the following steps: crushing the coal gangue, soil, matrix quality improvement material, red soil, vermiculite, and red clay, sieving them, and uniformly mixing them according to a mass ratio. Biochemical potassium fulvic acid is then added in a proportional amount, mixed evenly, and color confirmed to obtain a near-earth-colored soil matrix. This invention improves the near-earth-colored surface characteristics of the coal gangue-containing soil matrix, making the color of the coal gangue-containing soil matrix more similar to that of local soil. This method effectively supports the market application of coal gangue soil utilization technology and increases market acceptance.

The invention discloses a preparation method of an organic expanded vermiculite / full-biodegradable composite material, and belongs to the field of environment-friendly biodegradable materials. The composite material comprises the following raw materials in parts by weight: 5-30 parts of organic expanded vermiculite, 5-60 parts of polylactic acid, a degradable toughening agent and an auxiliary agent, and the vermiculite raw material in the organic expanded vermiculite is soaked in maleic anhydride or a silane coupling agent and is subjected to microwave expansion treatment. Compared with the prior art, degradation residues of the prepared composite material are mainly expanded vermiculite powder, and the composite material is environmentally friendly and free of pollution, has the effect of improving soil and can be applied to the fields of disposable knives, forks, spoons, straws, film bags and the like through formula adjustment of polylactic acid and the full-biodegradable flexibilizer.

The invention discloses a composite activator based on phosphogypsum as well as a preparation method and application thereof. The composite activator comprises the following raw materials in parts by weight: 50-70 parts of phosphogypsum, 5-15 parts of an alkaline activator, 10-20 parts of fly ash, 5-10 parts of slag powder, 0.5-1 part of a retarder, 0.5-1 part of a water reducer, 0.3-0.7 part of an organic silicon additive and 1-3 parts of expanded vermiculite. The preparation method has the advantage of high efficiency, and solves the problems that the automation degree is low in the preparation process of an existing phosphogypsum composite exciting agent, the steps of raw material weighing, mixing, water adding, filtering, forming and the like need to depend on manual operation, operation delay or unsmooth flow linkage is likely to occur, and the overall production period is prolonged.

The invention relates to the technical field of heat insulation materials, in particular to an organic / inorganic composite porous heat insulation film and a preparation method thereof. The preparation method of the organic / inorganic composite porous heat-insulating film comprises the following steps: adding a pore-forming agent into a meta-aramid solution to obtain a meta-aramid mixed solution; adding the vermiculite nanosheet dispersion liquid into the meta-aramid fiber mixed liquid to obtain an organic / inorganic mixed liquid; extruding or coating the organic / inorganic mixed solution on a substrate, and immersing the substrate in a coagulating bath to obtain organic / inorganic composite gel; and heating and drying while bidirectionally fixing the organic / inorganic composite gel to obtain the organic / inorganic composite porous heat-insulating film. The organic / inorganic composite porous heat-insulating film prepared by the preparation method of the organic / inorganic composite porous heat-insulating film has excellent performances of high temperature resistance, flame retardance, high strength, flexibility and the like.

The invention discloses an anti-dusting ablation-resistant silicon dioxide aerogel composite material based on multi-phase synergistic reinforcement and a preparation method of the anti-dusting ablation-resistant silicon dioxide aerogel composite material. The inorganic vermiculite powder reinforcement is introduced into the aerogel in situ, the particle size of vermiculite is controlled to realize anchoring-bridging dual effects, a three-dimensional interpenetrating network is formed by co-gelling with the organosilicon precursor solution and the fibrofelt, and the powder falling rate of the finally prepared silicon dioxide aerogel composite material is 1t; mg and Fe elements contained in the vermiculite can promote generation of a glass phase at a high temperature, and cooperate with the fiber felt to resist 1200 DEG C ablation. The density of the product can be controlled to be 200-350kg / m < 3 >, the heat conductivity coefficient is 0.025-0.040 W / (m.K), and the product is suitable for the field of aerospace thermal protection.

The invention discloses an electric hot tray and a cooking utensil, and relates to the field of electric heating. An electric heating disc comprises an electric heating film body, a metal cover plate and a buckle, and filling powder or a thermal expansion plate is arranged between the metal cover plate and the buckle. The filling powder can be placed at any position, and the thermal expansion plate is generally placed between the electrothermal film body and the buckle. The filling powder is graphite, magnesium oxide, aluminum oxide, vermiculite powder, sandy soil and other materials, and the thermal expansion plate is a material with the thermal expansion coefficient larger than that of a connecting material of the metal cover plate and the buckle. By using the filling powder, the powder can be moved through pressure and vibration to fill gaps in the electric heating plate, so that the electrothermal film main body is tightly attached to the metal cover plate, the electrothermal film main body can better dissipate heat, and the thermal power density of the electric heating plate is improved. The thermal expansion plate expands at high temperature, and the similar effect can also be achieved. The cooking utensil comprises any electric hot tray, the product is lower in height and smaller in size, and more cost is saved.

The invention relates to a vermiculite nanosheet film-based three-dimensional moisture generator and a preparation method thereof, the vermiculite nanosheet film-based three-dimensional moisture generator comprises a support, a bottom positive electrode, a functional layer, a bottom negative electrode and a solution pool, the support is successively coated with a positive electrode slurry and a functional mixture, the functional mixture comprises a vermiculite slurry and an adhesive, and a part of the functional layer is wiped to expose the bottom positive electrode. A middle interlayer positive electrode and a middle interlayer negative electrode are embedded into the solution tank, and a moisture absorption mixture is injected into the solution tank and comprises a polymer electrolyte and a fixing agent; the electrode extends out of the solution tank, the bottom positive electrode is close to the middle interlayer positive electrode, the bottom negative electrode is close to the middle interlayer negative electrode, the bottom positive electrode and the bottom negative electrode are oppositely arranged, and the middle interlayer positive electrode and the middle interlayer negative electrode intersect with the bottom positive electrode and the bottom negative electrode. Compared with the prior art, the non-flowing stable moisture absorption layer is formed, and use is more convenient; energy can be fully used, the mutual charging and discharging process is completed, and the recovery speed is increased.

The present application provides a friction material, a brake friction pad and a preparation method thereof, and a brake friction pair. The friction material includes the following components: 20% to 60% of a first damping material, 8% to 29% of a second damping material, 10% to 20% of an adhesive, 3% to 15% of spherical alumina, 3% to 20% of zirconium silicate, 3% to 10% of stannous sulfide, and 3% to 15% of chromite; wherein the first damping material includes a chrome steel alloy, a manganese copper alloy, and a cast iron alloy; and the second damping material includes vermiculite and porous graphite. The present application uses a first damping material with an excellent attenuation coefficient and an inorganic second material with a porous structure to prepare a friction material; the first damping material can convert external mechanical vibration energy into internal friction heat energy, thereby reducing vibration intensity; the porous structure of the second damping material can absorb and reduce the transmission of brake vibration energy, thereby reducing brake vibration and noise.

The invention relates to the technical field of mine restoration, in particular to an ecological restoration method for a mine slope. Slope surface dangerous rocks and sundries of the mine side slope are cleaned, and the cleaned side slope is obtained; spraying and seeding a planting matrix on the cleaned side slope; the planting substrate comprises the following components in parts by weight: 3-8 parts of a water-retaining agent, 15-20 parts of plant straws, 5-10 parts of coconut shells, 5-10 parts of peanut meal, 10-20 parts of a decomposed organic fertilizer, 5-10 parts of a microbial agent, 10-20 parts of rural soil, 10-20 parts of diatomite and 5-10 parts of vermiculite; the microbial agent contains bacillus licheniformis, bacillus flexus, bacillus marinus and bacillus coagulans; plant seeds are sowed on the planting substrate. By adopting the method for repairing the side slope, heavy metal in soil can be removed, the side slope can be greened, and the side slope is gradually covered year by year.

The invention is applicable to the technical field of soil remediation methods, and provides a microbial purification remediation method for petroleum hydrocarbon contaminated soil, which comprises the following steps: drying and crushing the petroleum hydrocarbon contaminated soil; fully mixing the crushed polluted soil with a soil remediation agent; the soil remediation agent is prepared from the following raw materials: modified cellulose aerogel, modified tourmaline, modified vermiculite, a microbial complex microbial inoculant, carbon powder, iron ore powder and humic acid, the microbial complex microbial inoculant is added, petroleum hydrocarbon is degraded by utilizing microorganisms, and the soil remediation agent has a good soil remediation effect and environmental friendliness and is suitable for being used for soil remediation. By adding the modified cellulose aerogel, a three-dimensional network repairing and purifying system is formed, and the purifying and repairing efficiency is improved; by adding the modified tourmaline, the PH value of the soil can be adjusted, microbial reproduction can be promoted, and the microbial activity can be improved; and by adding the modified vermiculite, the remediation and purification effects are further improved.

The invention relates to the technical field of preparation of rice seedling raising substrates, in particular to a preparation method and application of a rice seedling raising substrate based on rapid fermentation of reed foam, and the rice seedling raising substrate comprises the following components in parts by weight: 35-50 parts of reed residue, 15-22 parts of cow dung, 8-15 parts of carbonized rice husk, 10-20 parts of turf, 13-22 parts of modified bacterium-loaded vermiculite and 3-8 parts of a nutritional composition, the modified bacterium-loaded vermiculite comprises nitrogen-fixing bacteria and a vermiculite carrier subjected to functional modification. According to the invention, humic acid and other active substances generated in the composting fermentation process of reed residues and cow dung can chelate metal ions in the nutritional composition, the bioavailability of the nutritional composition is improved, and carbonized rice husks, turf and bacterium-loaded vermiculite construct a composite substrate system with excellent physical properties and strong biological functions. Organic unification of nutrition supply, physical support and biological regulation is realized, and an ideal growth medium is provided for cultivating robust rice seedlings suitable for mechanical transplanting.

The invention relates to a digestion method and a detection method for coal gangue in coal gangue ICP-MS (inductively coupled plasma-mass spectrometry) detection, and aims to solve the problem that the accuracy of a detection result is relatively poor when lithium and gallium in the coal gangue are detected by ICP-MS. The digestion method comprises the following steps: mixing a coal gangue sample with a digestion solution, then carrying out first heating until brown gas disappears, and carrying out second heating until the brown gas disappears; then heating for the second time until the solution is clear and transparent, and adding dilute nitric acid to obtain a digested sample solution; according to the digestion method provided by the invention, the digestion process is specifically designed, the coal gangue can be digested without low-temperature ashing of the coal gangue, the volatilization loss of lithium and gallium in the low-temperature ashing process is avoided, and the content accuracy of trace lithium and gallium elements in the obtained coal gangue is high; and the method can also be used for analysis detection, content control and evaluation of other similar trace elements in the coal gangue.

The invention discloses a soil replacement medium and a preparation method and application thereof, and belongs to the technical field of municipal engineering, the soil replacement medium provided by the invention comprises an upper planting layer, a middle replacement medium layer, a lower replacement medium layer and a bottom gravel layer from top to bottom; wherein the upper planting layer comprises vermiculite and soil; the middle replacement medium layer comprises sawdust and iron ore from top to bottom; the lower replacement medium layer is river sand; the upper planting layer guarantees the growth environment of plants; the sawdust in the middle-layer filling medium is used for providing a carbon source, the iron ore and phosphate are subjected to complex reaction and generate chemical bonds, the lower-layer filling medium is used for improving the infiltration capacity, and the bottom gravel layer is used for regulating and storing and avoiding blockage, so that pollutant interception and rainwater infiltration are realized. According to the invention, vermiculite is matched with other modifying agents for use, so that the interception effect on pollutants is effectively improved.

The utility model relates to the technical field of processing equipment, and provides processing equipment based on vermiculite insulation board production, which comprises a processing table, a protective cover, a cutting knife, a placing frame, a clamping plate, a cleaning plate, a chip discharging screen plate and a collecting cylinder, an inner cavity is arranged in the processing table, the protective cover is fixedly connected to the top end of the processing table, a feeding port is arranged on one side of the protective cover, and a discharging port is arranged on the other side of the protective cover. The cutting knife is lifted through the driving assembly and rotationally installed in the protective cover, the containing frame is slidably arranged on one side of the feeding port through the pushing seat, the two clamping plates are oppositely slidably arranged in the containing frame through the clamping assembly, two limiting openings used for sliding of the clamping plates are formed in the containing frame, and a scrap discharging opening is formed in one side of the machining table. The collecting barrel is located on the lower side of the scrap discharging net plate, and the lower side of the scrap discharging opening is detachably connected with a collecting box. By means of the technical scheme, the problem that in the prior art, chippings generated during machining can hinder the feeding process of the vermiculite insulation board to a certain extent is solved.

The invention provides a preparation method of a nano high-performance iron runner castable, and belongs to the technical field of refractory materials. The preparation method comprises the following steps: preparing the following raw materials in parts by weight: 62-67 parts of brown fused alumina, 18-22 parts of silicon carbide, 4-7 parts of calcium-doped mesoporous zirconia, 2-5 parts of vermiculite, 6-8 parts of alpha alumina micro powder, 2-3 parts of titanium dioxide, 1-3 parts of coke powder, 0.1-0.3 part of aluminum powder, 1-3 parts of silicon powder, 1-2 parts of titanium powder, 1-3 parts of nano alumina, 2-3 parts of a binding agent and 0.3-0.5 part of a water reducing agent; and S2, putting the raw materials in the step S1 into a stirrer, stirring for 10-15 minutes, and uniformly mixing to obtain the nano high-performance iron runner castable. The apparent porosity of the castable in a high-temperature use environment of 1450 DEG C is reduced, and the high-temperature compression strength of the castable is improved.