121 results about "Phosphate fertilizer" patented technology

The invention provides a moniliella malayi and a fungicide and application thereof, and relates to the field of microorganisms. The acer rubrum is specifically acer rubrum RA, and the preservation number of the acer rubrum RA is CGMCC (China General Microbiological Culture Collection Center) No.35889. The acer rubrum RA can be used for preparing the acer rubrum. The strain has the capability of decomposing inorganic phosphorus, is wide in phosphorus-dissolving range, can decompose tricalcium phosphate, iron phosphate and aluminum phosphate, and particularly still has very strong capability of decomposing inorganic phosphorus under a low-temperature condition; the strain has the capability of producing siderophore and IAA at low temperature; the strain has an inhibition effect on various pathogenic bacteria causing field crop diseases, and can inhibit diseases such as corn root rot, sorghum leaf spot or wheat root rot; the strain can be colonized in a soil environment of 5-40 DEG C, a microbial inoculum prepared from the strain can promote crop growth, the crop yield is remarkably improved, and high yield can be achieved even if the usage amount of phosphate fertilizer is reduced.

The invention belongs to the field of guidance of crop planting through image data processing, and particularly relates to a crop nutrient abundance and deficiency diagnosis model based on unmanned aerial vehicle image data and application thereof. The invention firstly provides a method for constructing a crop nutrient abundance and deficiency diagnosis model based on unmanned aerial vehicle image data, and the method comprises the following steps: S1, collecting canopy multispectral data of crops with different fertilizer application amount gradients in different growth periods, and collecting soil samples; s2; processing the multispectral data to obtain a vegetation index of crop growth, and measuring a soil nutrient index; and S3, obtaining a regression equation for calculating the soil nutrient index by using the key vegetation index, and judging whether the fertilizer needs to be supplemented or not by using the full-amount fertilization contrast as a threshold value. The invention further comprises the model and application of the model in guiding fertilization. Through unmanned aerial vehicle multispectral monitoring and dynamic threshold analysis, nutrient demand changes of crops in different growth periods are accurately captured in combination with an intelligent algorithm, and a field phosphate fertilizer deficient area is effectively identified to realize accurate fertilization.

To provide a phosphate-containing solid and a method for producing the same, with the use of sewage sludge incineration ash as a raw material, which has a high proportion of citrate-soluble phosphoric acid relative to a total phosphoric acid, contains a low amount of free phosphate, and can be effectively utilized as a phosphate fertilizer.SOLUTION: A phosphate-containing solid is produced by reacting sewage sludge incineration ash and sulfuric acid under non-aqueous conditions to generate water-soluble or citrate-soluble phosphates,in which the quantities of the aforementioned sewage sludge incineration ash and sulfuric acid are controlled during this generation process to achieve a citrate-soluble phosphate ratio relative to a total phosphoric acid of the phosphate to be produced of 0.7 mass ratio or higher, and a free phosphate content of 8 mass% or less, and a manufacturing method thereof is provided.SELECTED DRAWING: Figure 1

The invention belongs to the field of inorganic chemical industry, and particularly relates to a method and a system for efficiently utilizing a phosphate fertilizer byproduct, the method comprises the following steps: carrying out acidolysis on fluosilicic acid with the concentration of more than or equal to 45% wt and concentrated sulfuric acid to generate a mixed solution of silicon tetrafluoride gas and fluorosulfonic acid; the mass ratio of the fluosilicic acid to the concentrated sulfuric acid is controlled to be 1: (4-15); pyrolyzing the obtained fluorosulfonic acid to generate dilute sulphuric acid, hydrogen fluoride and water vapor, forming 98% concentrated sulphuric acid from part of dilute sulphuric acid and fuming sulphuric acid, drying hydrogen fluoride to obtain crude hydrogen fluoride gas, and condensing and rectifying to obtain anhydrous hydrogen fluoride; the rest dilute sulphuric acid is partially compounded and then returned for acidolysis, and the rest dilute sulphuric acid is used for producing white carbon black and flows back to a wet-process phosphoric acid system; and circularly absorbing the obtained silicon tetrafluoride gas by using secondary concentrated fluosilicic acid to obtain fluosilicic acid with the mass concentration of more than or equal to 45%, recycling the fluosilicic acid for acidolysis reaction, and modifying the concentrated by-product silicon dioxide to obtain the high-activity white carbon black. The problems of energy consumption and cost are solved, and efficient circulation and poly-generation of fluorine and silicon resources are achieved in the whole process.

The embodiment of the application provides a calcium superphosphate chemical conversion device capable of improving stirring rate, and relates to the technical field of phosphate fertilizer processing. The device comprises a mixing tank, a feeding port is arranged at the top end of the mixing tank, a first motor is arranged at the center position of the top end of the mixing tank, a rotating shaft is fixedly arranged on one side of the first motor, a first gear is fixedly arranged on one side of the rotating shaft, second gears are symmetrically and meshingly connected on the two sides of the first gear, and rotating rods are fixedly arranged on one side of the two second gears. Through the operation of the first motor, the rotating shaft is driven to rotate, the two second gears on the two sides are driven to rotate through the meshing of the first gear, and then the rotating rods are driven to rotate, the first stirring rod, the L-shaped rod and the second stirring rod are driven to synchronously rotate, the coverage area is improved through the first stirring rod, the L-shaped rod and the second stirring rod, and the stirring process is more uniform and efficient, and good sufficient stirring is achieved.

The invention provides a phosphorus release improving type compound fertilizer based on a fungal extracellular polymer, a preparation method and application, and belongs to the technical field of microorganisms, the phosphorus release improving type compound fertilizer is prepared by compounding the extracellular polymer generated by specific rhodotorula mucilaginosa WTSX01 and inorganic phosphate according to the mass ratio of 1: 9; the preparation method comprises the following steps: extracting and purifying high-activity EPS from a strain fermentation broth by a low-temperature dialysis method, separating lipid from EPS as a natural adhesive by a cosolvent extraction method, and finally mixing EPS, lipid and inorganic phosphate. The invention also discloses a synergistic application of the fertilizer and a phosphorus-solubilizing fungus aspergillus niger (CCTCC No. M2023240), so that the release efficiency of phosphorus in soil is improved; the fertilizer provided by the invention provides exclusive nutrition for phosphate-solubilizing microorganisms, effectively overcomes indigenous microorganism competition, remarkably promotes microorganism growth and phosphorus release, and realizes reduction and synergism of phosphate fertilizer and yield increase of crops.

The invention provides a phosphorus-fixing lanthanum-based nano composite material as well as a preparation method and application thereof, and relates to the field of novel nano composite materials. According to the material, lysozyme protein fibers are taken as a structural template, a confinement space is constructed by utilizing the ultrahigh length-diameter ratio of the lysozyme protein fibers, and controllable synthesis of the sub-5nm high-dispersion lanthanum oxide nanoparticles is realized. Functional groups in a protein chain can be enriched and nucleation sites can be provided through electrostatic attraction and key coordination synergistic effect, so that the lanthanum-based protein fiber nano composite material is formed. When the material is used for treating phosphorus wastewater, efficient phosphorus removal and long-term phosphorus fixation are realized through an enrichment-conversion synergistic mechanism: phosphate ions are enriched through electrostatic adsorption, and thermodynamically stable lanthanum phosphate is generated in situ at lanthanum active sites. According to the method, gt is still kept in the presence of high-concentration equal competitive ions; the phosphorus removal rate is 90%, the generated lanthanum phosphate can be used as a slow-release phosphate fertilizer or an industrial phosphorus chemical raw material, and closed-loop conversion from pollution purification to resource utilization is realized.

The invention provides a method, a system and equipment for generating a special fertilizer formula for crops. The method comprises the following steps: acquiring crop growth data of any region; constructing a nitrogen fertilizer recommendation model according to the crop growth data, and obtaining a nitrogen application amount prediction value and a yield prediction value; constructing a phosphate fertilizer recommendation model based on a phosphate fertilizer grading standard according to the yield prediction value and the actually measured data of the content of the rapidly available phosphorus in the soil, and obtaining a phosphorus application amount prediction value; establishing a potash fertilizer recommendation model based on a potash fertilizer grading standard, and obtaining a potassium application amount prediction value; respectively calculating the base fertilizer amount and the topdressing amount of nitrogen, phosphorus and potassium according to the predicted value of the nitrogen application amount, the predicted value of the phosphorus application amount, the predicted value of the potassium application amount and the base-topdressing ratio; constructing a base fertilizer formula model according to the base fertilizer amount of nitrogen, phosphorus and potassium; and constructing a dynamic adjustment model according to the topdressing amount of nitrogen, phosphorus and potassium, and calculating a topdressing correction value. The method can accurately and efficiently formulate a fertilization strategy which is suitable for crops, lands and conditions, obviously improves the utilization efficiency of the fertilizer, and reduces excessive application.

This invention discloses a wheat-specific fertilizer suitable for rice-wheat rotation and its preparation method, comprising the following steps: mixing equal volumes of carboxymethyl chitosan solution, composite biochar dispersion, and agar solution, then adding sodium tripolyphosphate solution dropwise, stirring, allowing to stand, dialyzing, and freeze-drying to obtain hydrogel particles; swelling the hydrogel particles in a mixed aqueous solution of urea and superphosphate, filtering, and vacuum drying to obtain the wheat-specific fertilizer suitable for rice-wheat rotation; this invention uses a coating material to coat composite biochar powder, nitrogen fertilizer, and phosphate fertilizer, and improves the utilization rate of nitrogen and phosphate fertilizer through the slow-release effect of the coating material; by adsorbing fixed trace metal elements through the coating material, the slightly acidic state of the phosphate fertilizer during dissolution is used to convert the adsorbed fixed trace metal elements into a free state, and then titanium aluminum carbide promotes the movement of the free trace metal elements, thereby promoting the absorption and utilization of trace metal elements by wheat roots and improving wheat yield and quality.

The invention discloses a nutrient element combined application combination for improving yield and quality of pinellia ternate and an application method. The nutrient element combined application combination comprises urea, calcium superphosphate, potassium sulfate, EDTA chelated copper, disodium octaborate tetrahydrate and sodium molybdate. The application method comprises the following steps: applying nitrogenous fertilizer and phosphatic fertilizer during sowing in April, applying nitrogenous fertilizer, phosphatic fertilizer, potash fertilizer, copper fertilizer, boric fertilizer and molybdenum fertilizer from June to July, and applying potash fertilizer, copper fertilizer, boric fertilizer and molybdenum fertilizer in August; according to the method, orthogonal experimental design is adopted, the nutrient element combined application combination most suitable for pinellia ternata production is obtained, the application method of the combined application combination designed by the invention is simple, convenient and easy to control, the yield of pinellia ternata can reach a relatively high level, the yield is 14619.42 kg: hm <-2 >, and the difference (P is less than 0.5) between the yield and the highest yield (14901.40 kg. Hm <-2 >) of the element combined application combination is not obvious.

The present invention relates to a fertilizing composition based on renewable phosphate fertilizers by proposing a composition which includes struvite, at least two trace elements, at least one secondary element, and at least one clay.

Ligand-coated, doped lithium iron phosphate, wherein the general formula of the ligand-coated, doped lithium iron phosphate is LiFePO4@Mn-TC / N, where T is zinc and / or nickel and / or copper and / or iron and / or cobalt and / or zirconium and / or aluminum and / or gallium and / or chromium, and wherein the ligand-coated, doped lithium iron phosphate is produced by a manufacturing process comprising the following steps: Mixing a phosphate fertilizer, an iron source and a regulator, heating the resulting mixture for a reaction, performing a solid-liquid separation and removing a solid phase for initial calcination to obtain iron phosphate; Mixing the iron phosphate with a lithium source, a carbon source, and a carbon microsphere conductor, stirring the resulting mixture, and subjecting the mixture to a second calcination to obtain carbon microsphere conductor-doped lithium iron phosphate; and Mixing the lithium iron phosphate doped with the carbon microsphere conductor with a sulfite and a liquid-phase ligand, stirring a resulting mixture and subjecting the mixture to aging, crosslinking and third calcination to obtain the ligand-coated lithium iron phosphate, wherein the carbon microsphere conductor comprises carbon nanospheres, 1,6-bis(dimethylamino)hexane, a manganese source, a T source, methacrylamide and a dispersant, and wherein the T source comprises at least one of the following: soluble chloride salts, nitrates or sulfates of zinc, nickel, copper, iron, cobalt, zirconium, aluminium, gallium or chromium.

The invention discloses a straw-loaded and gel-coated dual slow-release phosphate fertilizer and a preparation method thereof. Mixing a phosphorus-containing solution with an H2O2 solution to prepare a mixed solution, mixing the straw powder with the mixed solution, heating and oscillating under a closed condition, neutralizing with alkali liquor until the pH is acidic, filtering, drying, and crushing to obtain fertilizer core powder; granulating the fertilizer core powder by using an SA solution as an adhesive to obtain a fertilizer core of the dual slow-release phosphate fertilizer; and uniformly spraying a layer of SA / PAA mixed solution on the surface of the fertilizer core, and then immersing the fertilizer core in a CaCl2 / chitosan (CTS) / CH3COOH mixed solution for crosslinking to obtain the straw-loaded and gel-coated dual slow-release phosphate fertilizer. According to the invention, nutrient release is controlled through straw loading and gel coating, and phosphorus fixing cations in soil are complexed by utilizing the characteristic of SA polyanions, so that the effectiveness of the phosphate fertilizer in the soil is synergistically improved.

The invention relates to the technical field of sludge calcination, in particular to a method for regulating and controlling a phosphorus phase in a sludge calcination product by utilizing kaolinite. The invention discloses a method for regulating and controlling a phosphorus phase in a sludge calcined product by utilizing kaolinite. The method comprises the following steps: calcining a mixture of kaolinite and sludge in a certain proportion at 600-700 DEG C for 2-4 hours; in the mixture, the mass ratio of kaolinite is 8-10%. The kaolinite is added to be pyrolyzed and calcined with the sludge, under the synergistic effect of proportion, temperature and the like, phosphorus phase reconstruction in the calcined sludge product is regulated and controlled, the total phosphorus (TP) preservation amount is increased, and phosphorus in the sludge is converted into a form which has higher recovery value, higher bioavailability and is easier to extract subsequently, especially apatite-state phosphorus (AP); the phosphate fertilizer is stable in chemical property and moderate in solubility, and is a source of high-quality phosphate fertilizer or phosphorus chemical raw materials.

This utility model belongs to the field of automatic measurement technology, specifically relating to an automatic pH measuring device for viscous mother liquor of nitrate phosphate fertilizer. It includes a sampling tube, one end of which extends into a nitrate phosphate neutralization tank, and the other end of which is located outside the tank and connected to an analytical flow cell. A sampling container is connected to the upper part of the analytical flow cell via a pipeline. The upper part of the sampling container is connected to the inlet of a vacuum pump via a pipeline equipped with a suction solenoid valve. A pH probe is installed on the analytical flow cell to detect the pH value of the mother liquor flowing through it. The pH probe, suction solenoid valve, and vacuum pump are all electrically connected to a PLC controller. This utility model uses the cooperation of the vacuum pump and sampling tube to extract the mother liquor for pH measurement. During extraction, the mother liquor is in a sealed environment, preventing leakage. Simultaneously, the sampling container and integrated temperature transmitter effectively prevent the mother liquor from entering the vacuum pump.

The invention aims to provide a wet desulfurization method of a nitric phosphate by-product calcium carbonate residue, and belongs to the technical field of calcium carbonate desulfurization, the method comprises the following steps: carrying out impurity removal, quality improvement, grinding, drying and other processes on nitric phosphate calcium carbonate residue to prepare a calcium carbonate residue powder material, and applying the calcium carbonate residue powder material to a wet desulfurization process. The wet desulphurization method for the by-product calcium carbonate slag of the nitrophosphate fertilizer can replace an existing limestone desulfurizer to achieve efficient desulphurization, and exploitation of non-renewable limestone mineral resources is reduced.

The invention discloses a compound fertilizer containing traditional Chinese medicine components and application of the compound fertilizer in prevention and treatment of rice sheath blight disease, and belongs to the technical field of fertilizer preparation. The compound fertilizer containing the traditional Chinese medicine components is prepared from the following raw materials in parts by mass: 3 to 5 parts of radix puerariae, 4 to 6 parts of onion, 2 to 3 parts of herba menthae, 2 to 3 parts of flos chrysanthemi indici, 20 to 30 parts of humic acid, 1 to 1.5 parts of compound amino acid, 2 to 3 parts of microbial agent, 12 to 15 parts of soybean meal, 5 to 8 parts of silicon fertilizer, 10 to 15 parts of phosphate fertilizer and 30 to 40 parts of straw fermentation product. The compound fertilizer containing the traditional Chinese medicine components can effectively prevent and treat rice sheath blight disease, stimulate rice growth, improve rice seedling quality, develop rice root systems and improve rice tillering amount, thereby improving disease resistance and yield of rice.

The invention discloses a device and a process for recovering yellow phosphorus in phosphorus sludge based on multistage flash evaporation continuous evaporation. The device comprises a pretreatment system, a drying-pyrolysis-evaporation integrated system and a product recovery and treatment system, phosphorus slurry is pretreated in the pretreatment system in a steam crushing and mixing mode and then enters the drying-pyrolysis-evaporation integrated system for precise temperature control through gradient electromagnetic heating, and the product recovery and treatment system is used for recycling the phosphorus slurry. And finally, the yellow phosphorus enters a product recovery and treatment system, so that the yellow phosphorus and phosphorus-free residues are recovered. According to the device and the process, phosphorus slurry can be uniformly fed in the whole process, phosphorus is evaporated thoroughly, and the yellow phosphorus recovery rate reaches 95% or above; the equipment sealing performance is good, and the risk of ignition caused by spontaneous combustion of yellow phosphorus is effectively avoided; the phosphorus sludge processing capacity reaches 0.5-1.0 ton per hour, continuous and stable operation can be performed for more than 720 hours, and the recycled residues are uniform in granularity and can be used for production of phosphate fertilizers, cement and the like, so that resource recycling is realized.

A sustainable control release fertilizer and a producing method thereof are developed. The sustainable control release fertilizer comprises a natural char / struvite composite with different ratio of the natural char to struvite (0:100, 25:75, 50:50, 75:25). The natural char / struvite composites represent a phosphorus pentoxid content in a range of 16 wt% to 25 wt% which is more than a common phosphate fertilizer. Furthermore, a mole ratio of Mg2+:NH4+:PO4 3- in the sustainable control release fertilizer is 2:1:1. The sustainable control release fertilizer can enhance phosphorus uptake of at least one plant at early stage of growth due to its composition as well as the developed producing method of sustainable control release fertilizer is based on recovery of phosphorus from wastewater that has the good economic and environmental effects.

The invention discloses a method for preparing biochar slow-release phosphate fertilizer granules by using a starch-CMC binder, the method is used for improving the mechanical property and slow-release property of the biochar slow-release phosphate fertilizer granules through the preparation of the starch-CMC binder, and the method comprises the following steps: fully mixing biochar and monopotassium phosphate powder according to the mass ratio of (2-5): (0.5-1.5); the blended charcoal-based phosphate fertilizer is obtained for standby application; the preparation method comprises the following steps: mixing 15-35g of starch with sodium carboxymethyl cellulose with the mass concentration of 1-2%, adding 200ml of deionized water, putting a beaker into a water bath kettle with the temperature of 50-80 DEG C, and gelatinizing for 5-15 minutes to obtain a composite binder; fully stirring and blending the prepared composite binder and the blended charcoal-based phosphate fertilizer, and then putting the mixture into an extrusion granulator for extrusion granulation; and sieving the successfully prepared biochar-based phosphate fertilizer particles by a 10-mesh sieve, putting the sieved biochar-based phosphate fertilizer particles into an oven at 70-90 DEG C, drying for 2 hours, taking out the dried biochar-based phosphate fertilizer particles, and placing the dried biochar-based phosphate fertilizer particles at room temperature to obtain

The invention relates to the technical field of sewage treatment, in particular to a method for recovering phosphorus resources in excess sludge concentrated clear liquid in situ, which comprises the following steps: additionally arranging a reaction sedimentation tank at the front end of a sewage treatment biological system, introducing excess sludge concentrated clear liquid and part of sewage, and monitoring the flow of the sludge clear liquid, the phosphorus concentration and the ammonia nitrogen concentration in the sewage in real time. The sewage diversion flow and the magnesium liquid adding amount are automatically adjusted, the alkaline environment is regulated and controlled to promote struvite to crystallize and precipitate, and efficient phosphorus recovery is achieved. According to the method, automatic control and chemical precipitation principles are combined, only the existing process needs to be locally modified, the operation cost is low, the occupied area is small, the phosphorus recovery rate exceeds 99%, the generated struvite can be directly used as a phosphate fertilizer, the remarkable economic value is achieved, and meanwhile stable operation of a follow-up biological treatment unit is guaranteed.

The invention discloses a method for preparing slow-release phosphate fertilizer soil from graphite tailing sand and coal gangue and application, and relates to the technical field of solid waste resource utilization and agricultural fertilizer. The slow-release phosphate fertilizer soil is prepared by carrying out gradient magnetic separation-acid leaching synergistic pretreatment on graphite tailing sand (the removal rate of magnetic impurities reaches 92%-95%), carrying out segmented roasting-microwave activation treatment on coal gangue (the specific surface area is increased to 28.6-32.4 m < 2 > / g), then mixing the pretreated raw materials with a composite exciting agent, and carrying out a low-temperature sintering-granulation molding process. The problem of low resource utilization rate of the graphite tailing sand and the coal gangue is effectively solved, the soil phosphorus slow release period of the prepared phosphate fertilizer reaches 120-150 days, the prepared phosphate fertilizer can meet the nutrient requirement of phosphorus-loving crops in the whole growth period, compared with a traditional phosphate fertilizer, the usage amount is reduced by 30-40%, the phosphorus utilization rate is increased to 65-72%, and remarkable economic, environmental and social benefits are achieved.

The invention discloses a humic acid water-soluble fertilizer for improving rooting and strengthening roots of crops and a preparation method of the humic acid water-soluble fertilizer, and belongs to the technical field of fertilizer preparation. Mixing the ore source humic acid and an oxidizing agent for reaction to obtain an oxidized ore source humic acid mixture; heating the oxidized ore source humic acid mixture and solid alkali to react, performing centrifugal treatment to obtain an activating solution, performing acid treatment on the activating solution, and performing centrifugal separation to obtain a humic acid precipitate; mixing and dispersing the humic acid precipitate, methacrylic acid modified cyclodextrin and deionized water, heating and stirring to obtain a humic acid inclusion dispersion liquid; mixing the humic acid inclusion dispersion liquid, acrylic ester, an emulsifier and an initiator, heating, reacting and polymerizing to obtain polyacrylate-coated humic acid emulsion dispersion; and mixing the polyacrylate-coated humic acid emulsion dispersion and a calcium-containing phosphate fertilizer to form the humic acid water-soluble fertilizer. The humic acid water-soluble fertilizer prepared by the preparation method disclosed by the invention has good fertilizer efficiency when being applied to crops.

The invention discloses a treatment method of phosphorus chemical phosphorus-containing waste residues. The treatment method is used for avoiding waste of phosphorus resources. The treatment method comprises the steps that concentrated acid sludge and raffinate acid sludge are conveyed into a mixing tank according to a preset volume ratio to be mixed and stirred, and mixed sludge acid is obtained; the mixed sludge acid is conveyed to a vertical filter pressing device for filter pressing separation, compressed air is introduced for air drying, and clear acid and filter residues are obtained; conveying the clear acid obtained after filter pressing to a phosphate fertilizer device for reprocessing the clear acid into a high-concentration fertilizer; the filter residues obtained after filter pressing are conveyed to a material warehouse through a belt conveying device and used for reprocessing the filter residues into the low-end phosphate fertilizer.

The invention relates to the technical field of agricultural technologies, and discloses a perlite water and fertilizer retention slow release fertilizer which is prepared from the following components in parts by weight: 10-30 parts of a chemical fertilizer, 5-20 parts of a phosphate fertilizer, 5-20 parts of a potash fertilizer, 20-50 parts of water and 10-40 parts of perlite, according to the preparation method, the porous perlite is used as a fertilizer carrier, the core problem of low fertilizer utilization rate is effectively solved, leaching and runoff loss of soluble nutrients such as nitrogen and potassium in the early stage of crop growth are remarkably reduced, it is ensured that the fertilizer can be fully absorbed in the critical period of fertilizer demand of nursery stocks, the fertilizer utilization rate is greatly increased, and the yield of the nursery stocks is increased. The agricultural production cost is reduced, and the environmental pressure such as water eutrophication caused by nutrient loss is relieved from the source.

This utility model discloses a coarse particle recovery system for calcined ore, comprising a feeding hopper, a clinker elevator, a clinker silo, a chain plate scale, a wet ball mill, a slurry tank, a leaching tank, a filter press, and a clarification tank. The feeding hopper is connected to the feed end of the clinker elevator, and the clinker silo is connected to the discharge end of the clinker elevator. The chain plate scale is installed between the clinker silo and the wet ball mill for conveying and metering the granular calcined ore. The slurry tank is connected to the discharge port of the wet ball mill. The leaching tank is connected to the slurry tank via a pipeline, and the discharge port of the leaching tank is connected to the feed port of the filter press. The clarification tank is connected to the filtrate outlet of the filter press. This utility model enables the recovery and reuse of coarse particle calcined ore. The resulting filter cake can be directly used in the nitric acid phosphate fertilizer workshop, saving production costs and solving the problem of occupying warehouse space in the nitric acid phosphate fertilizer workshop.

The application discloses a method for preparing white carbon black and ammonium fluoride from silicon tetrafluoride, wherein the silicon tetrafluoride gas enters an ammoniation reactor through the middle part, the carrier gas and the ammonia gas enter the ammoniation reactor through the bottom part, solid particles SiO2 and NH4F are generated, the carrier gas flows out from the top outlet of the ammoniation reactor and enters a separator, solid slurry is rapidly formed after being washed in the spray at the top inlet of the separator, and then the solid slurry is settled into the separator; inert solvents are added into the separator, and SiO2 and NH4F are separated by using the density difference. The application uses the SiF4 gas obtained by decomposing fluorosilicic acid or the by-product silicon tetrafluoride gas of phosphate fertilizer as raw materials to continuously produce high-quality white carbon black and ammonium fluoride, and the method is continuous, stable, simple, and has a long operation period, and effectively overcomes the defects of the existing intermittent process technology.

The invention discloses a rapid phellinus igniarius fungus stick decomposition method suitable for a bamboo forest environment. The rapid phellinus igniarius fungus stick decomposition method comprises the following steps: mechanically crushing fungus sticks; a decomposition flora is introduced; a bamboo forest ecological circulation system is constructed; the mushroom stick substrate comprises the following components: 30-40% of bamboo sawdust; 20%-30% of mulberry twig sawdust; 15%-20% of wheat bran; 10%-15% of corncob; 1%-2% of gypsum; 0.5%-1% of a phosphate fertilizer; the content of cellulase is 0.1%-0.5%, the content of hemicellulase is 0.05%-0.1%, and the content of ligninase is 0.05% The phellinus igniarius fungus stick has the advantage that the phellinus igniarius fungus stick can be quickly decomposed in the bamboo forest land.

The application discloses a method for determining the surplus amount of phosphorus fertilizer application for regional wheat, and relates to the field of agricultural technology.The method comprises the following steps: obtaining the yield increment of phosphorus fertilizer for regional wheat according to field experiment data; constructing the regression relationship between the amount of applied phosphorus fertilizer and the yield increment; establishing the linear relationship between the amount of applied phosphorus and the apparent balance amount of phosphorus; determining the data range of phosphorus nutrient imbalance based on the yield increment of phosphorus fertilizer for regional wheat, and then obtaining the range of the amount of applied phosphorus; determining the range value of the apparent balance amount of phosphorus according to the relationship between the amount of applied phosphorus and the apparent balance amount of phosphorus in the step, which is the surplus amount of phosphorus application for regional wheat; and obtaining the surplus amount of phosphorus fertilizer application for regional wheat after data conversion.The method can guarantee the yield of wheat and maximize the saving use of phosphate rock resources, and provides a feasible measure for the intensive management of phosphorus fertilizer.

The application belongs to the field of phosphate fertilizer, and particularly relates to a controlled-release phosphate fertilizer, which comprises a core, an intermediate layer for coating the core, and a shell layer for coating the intermediate layer; the core contains phosphate fertilizer; the intermediate layer material is biochar and a phosphorus source adsorbed by the biochar; and the shell layer material is a material obtained by heat treatment of the intermediate layer material; the application further comprises preparation and application of the controlled-release phosphate fertilizer; in the application, biochar mixed with phosphate fertilizer is used as the core, biochar adsorbed with a phosphorus source is used as the intermediate transition layer, and a heat-treated material of biochar adsorbed with a phosphorus source is used as the shell layer material; through joint control of the materials and the special hierarchical structure, the composition and structure are synergized, the phosphorus is transferred from inside to outside in stages, the slow-release effect of the phosphorus is effectively improved, and in addition, the slow-release behavior of the phosphorus can be conveniently regulated based on the use requirements of different plants, so that the controlled slow release of the phosphate fertilizer is realized.