391 results about "Phosphorite" patented technology

The embodiment of the invention discloses a mineral resource exploration data analysis method and device based on three-dimensional space modeling. The method comprises the steps that back-flushing pushing-covering structure feature information is extracted through structure interface occurrence measurement, lithology combination analysis and structure movement trace recognition and converted into geologic structure feature parameters; stratigraphic age data and lithology distribution information are integrated, and a three-dimensional stratigraphic model is constructed with a stratigraphic superposition relation as a constraint; geophysical data are imported to extract geophysical response characteristics of stratums with different depths, and lithologic boundary correction is combined to obtain deep fracture characteristic parameters; sedimentary system division is carried out on lithofacies paleogeographic information, and deep fracture characteristic parameters are fused to establish a fracture system three-dimensional model; the multi-feature association relationship is identified, the ore body prediction model is established, the spatial data is input to obtain the three-dimensional visual prediction result of the hidden ore body spatial distribution, and the exploration efficiency and accuracy in the deep phosphorite exploration process are improved.

The invention relates to the technical field of mineral processing visual detection, and discloses a visual analysis system for detecting the grade of a phosphorite flotation froth layer. The system comprises an image acquisition and decomposition module, a parallel feature extraction module, a dynamic feature fusion module, a foam evolution analysis module and a grade decision output module. The system performs multi-scale decomposition on a foam image, extracts physical and semantic features in parallel, constructs a dynamic fusion network based on bidirectional mapping to perform iterative interaction, and generates a multi-modal feature descriptor. Therefore, self-organizing growth of a foam evolution graph is driven, an evolution track of a key foam primitive is positioned and tracked, a foam grade state vector is formed, and finally, a regulation and control decision is output in combination with external control parameters. According to the system, deep fusion of physical and semantic features and deep analysis of the foam dynamic evolution process are achieved, the accuracy and predictability of foam grade state sensing are improved, and an effective means is provided for accurate control over the flotation process.

The invention relates to the technical field of phosphoric acid production, in particular to an intelligent optimization management method for phosphoric acid production process parameters. Obtaining adaptive window ranges at different moments according to data change characteristics of the phosphoric acid concentration sequence; obtaining a phosphoric acid production benefit value according to the phosphoric acid concentration in the self-adaptive window range; obtaining a benefit reference value according to the phosphoric acid production benefit value in the historical batch production process; obtaining a benefit comparison value according to the phosphoric acid production benefit value at the current moment and a benefit reference value; judging whether the production process is adjusted according to the benefit contrast value; obtaining a parameter deviation coefficient according to the difference characteristic of the sulfuric acid concentration of the production process corresponding to the benefit reference value and the current production process; and according to the parameter deviation coefficient and the benefit contrast value, obtaining a phosphorite putting amount difference coefficient. According to the parameter deviation coefficient, the phosphorite feeding amount difference coefficient and the benefit contrast value, the sulfuric acid concentration or the phosphorite feeding amount at the current moment is iteratively adjusted, and the quality of the phosphoric acid production process is improved.

The invention relates to the field of environment, phosphorite resource utilization and agricultural biotechnology, in particular to a phosphate ore-containing phosphate-solubilizing bacterial agent, a preparation method thereof, a biological bacterial fertilizer and application, the phosphate ore-containing phosphate-solubilizing bacterial agent comprises phosphate-solubilizing bacteria, hydroxyapatite and a culture medium, and the phosphate-solubilizing bacteria are enterobacter hormaechei HS-6. The hydroxyapatite is used for preparing the phosphate ore-containing phosphate-solubilizing bacterial agent, so that the phosphate ore resource can be greatly promoted to be fully utilized, and the dissolution of insoluble phosphorus in the phosphate ore is realized. According to the phosphate-containing ore phosphate-solubilizing bacterial agent, the enterobacter hormaechei HS-6 is combined with the hydroxyapatite, so that the phosphate-solubilizing capacity of the enterobacter hormaechei HS-6 can be utilized, and the phosphorus resource of the hydroxyapatite can be fully utilized. The phosphate-containing ore phosphate-solubilizing bacterial agent has good prospects in application to preparation of biological bacterial fertilizer, application to agricultural soil improvement, application to phosphate ore resource recovery and application to promotion of wheat growth.

The utility model relates to the technical field of phosphorite processing equipment, in particular to a phosphorite flotation system for producing multi-quality phosphate concentrate, which comprises a ball mill, the output end of the ball mill is connected with a first flotation column, one side of the top of the first flotation column is connected with a flotation machine, and one side of the bottom of the first flotation column is connected with a concentrate thickener. The bottom of one side of the flotation machine is connected with a reverse sweeping conveying pipe, the other side of the bottom of the first flotation column is connected with a buffering groove, and an ore pulp pump is installed at the output end of the buffering groove. According to the phosphorite flotation system for producing the multi-quality phosphate concentrates, equipment such as the ball mill, the flotation column, the flotation machine, the concentrate thickener, the buffer tank, the ore pulp pump and the swirler is creatively integrated, the technological process is optimized, and the target of producing the multi-quality phosphate concentrates on line is achieved. The system not only improves the comprehensive utilization rate of phosphorite resources, but also remarkably enhances the flexibility and diversity of production, and meets the requirements of the market on differentiated and high-quality phosphorus chemical products.

The invention discloses a deep niobium phosphate ore positioning physical and chemical exploration method based on multi-method cooperation, and belongs to the technical field of geological mineral exploration. According to the method, a three-stage exploration system of region optimization, target region delineation and fine verification is constructed, multi-parameter cooperation of a magnetic method, an electromagnetic method, an induced polarization method, a three-component magnetic logging method and a geochemical method is combined, and each step is constrained by a basic rock-niobium phosphorite metallogenic model. An ore prospecting mark is determined through regional geological background analysis and metallogenic model construction, a metallogenic prospective region is delineated through regional optimization, a specific target region is delineated and locked, engineering verification is carried out through fine verification, and finally, a result is integrated to estimate the resource quantity. According to the method, the multiplicity of solutions of a single method is effectively reduced, the positioning precision of the deep niobium phosphorite is improved, the exploration efficiency and the target area ore finding rate are improved, and the method is suitable for accurate exploration of the deep niobium phosphorite.

The invention relates to a phosphorite wet processing method, and belongs to the technical field of chemical engineering. The phosphorite wet processing method comprises the following steps: A, phosphorite acid leaching: carrying out acidolysis leaching on a phosphorite raw material, and carrying out solid-liquid separation to obtain wet-process phosphoric acid; b, removing metal ions from wet-process phosphoric acid; and C, wet-process phosphoric acid defluorination: extracting fluosilicic acid in wet-process phosphoric acid at 10-70 DEG C by adopting a wet-process phosphoric acid defluorination extraction agent, and carrying out phase splitting to obtain defluorinated purified phosphoric acid and an organic phase loaded with fluosilicate. According to the invention, high-value utilization of low-grade phosphorite resources is realized. According to the method, impurities can be fully removed, the loss rate of phosphoric acid is low, the purity of the finally obtained phosphate product reaches 97% or above, the product quality is high, and the requirements of different fields for high-quality phosphate can be met. The method is simple in process, low in energy consumption and low in cost.

The present application belongs to the field of phosphate mining, and particularly relates to a method for mining a steeply inclined phosphate deposit without leaving a top and bottom pillar; the method comprises the following steps: dividing the phosphate layer in a mining section into several stages from bottom to top along the inclination, constructing a stage transport main in the lower part of each stage, and using the stage transport main of the previous stage as the stage auxiliary transport main of the next stage without leaving a bottom pillar and a top pillar; constructing an air return crosscut in the upper part of the uppermost stage from the air shaft, and then excavating an air return shaft from the air return crosscut downward along the inclination of the phosphate layer to connect with the stage auxiliary transport main and the stage transport main; arranging strip blocks along the strike on both wings of the stage to perform skip mining, first mining the odd strip blocks and filling them, and then mining the even strip blocks, the size of the strip blocks being determined according to the strength of the roof and floor, and no inter-pillar being left between the strip blocks; and thus mining all the stages from bottom to top. The present application greatly reduces the leaving of pillars and improves the resource recovery rate of one stoping.

The present application belongs to the field of phosphorite deposit mining technology, and particularly relates to a method for recovering a phosphorite layer bottom pillar under a filling body, which comprises arranging a segmented transport roadway in a sandwich in the top and bottom surface of the bottom pillar to reduce the construction engineering quantity of the rock drilling roadway and the ore roadway; first constructing a filling roadway intersecting on both sides of the segmented transport roadway, filling the filling body roadway with high-strength filling material, and then constructing the segmented transport roadway in the filling roadway, so that the segmented transport roadway is finally topped and bottomed with the sandwich rock, and both sides of the segmented transport roadway are high-strength filling bodies, which greatly improves the strength of the segmented transport roadway and reduces the influence of ore mining. Further, the present application proposes an invention point of leaving a permanent ore pillar in the ore body on one side of the sandwich bottom plate to improve the safety of the segmented transport roadway and the ore room mining; in order to further improve the safety of the ore room mining, the present application first proposes an ore room adopting an eight-character-shaped stope structure.

The invention discloses a ternary solid waste gelling system mine cemented filling material, a preparation method and application, phosphogypsum and water-quenched slag powder are used as main gelling components, carbide slag is used as an exciting agent, and phosphate tailings and phosphorus tail mud are used as filling body aggregate to form the high-content phosphogypsum ternary solid waste gelling system mine cemented filling material. Wherein the ternary solid waste gel system comprises the following components in percentage by weight: 10-18% of carbide slag, 36-54% of ardealite and 36-54% of water-quenched slag powder, and the ratio of ardealite / (ardealite + water-quenched slag powder) is 0.4-0.6. The mine cemented filling material disclosed by the invention is prepared by taking solid wastes of industrial byproducts of a phosphorite mountain and the periphery of the phosphorite mountain as main raw materials, and the mechanical property of the prepared filling slurry after solidification needs to meet an engineering filling strength index, so that efficient resource utilization of a large amount of industrial solid wastes for phosphorite resource development can be realized; good mechanical properties and remarkable economic and environmental benefits are achieved.

The invention relates to a high-temperature acidolysis reaction defluorination method, and belongs to the technical field of phosphorus chemical resource recycling. The technical problem to be solved by the invention is to provide a high-temperature acidolysis reaction defluorination method which is simple to operate and high in defluorination rate. According to the method, phosphorite powder / white fertilizer is subjected to high-temperature acidolysis, fluoride in the phosphorite powder / white fertilizer reacts with strong acid, fluorine is separated from a reaction system in a gas form, and hydrofluoric acid is obtained through condensation. The method is simple, is simple and convenient to operate, and is easy to realize technologized large-scale production. Meanwhile, due to the destructive effect of the strong acid on the lattice structure of the phosphorus-calcium compound, citrate-soluble phosphorus can be converted into soluble phosphate, subsequent phosphorus recovery is facilitated, comprehensive utilization of phosphorite and elimination of white fertilizer output are achieved, meanwhile, the problems of material accumulation and resource waste of enterprises are solved, and the method conforms to the circular economy concept of green development.

The invention discloses artificial soil based on manganese slag, red mud and ardealite. The artificial soil is mainly prepared from a manganese slag-red mud-ardealite mixed matrix and a modifier, the weight ratio of the manganese slag to the red mud to the ardealite in the manganese slag-red mud-ardealite mixed matrix is (0.4-1.6): (0.1-0.5): (0.5-0.9); the modifier comprises calcium oxide, and further comprises rice straw, biochar, zeolite or a combination thereof, and the modifier accounts for 1-15% of the weight of the artificial soil. Accordingly, a corresponding preparation method is also established. According to the method, the three solid wastes are mixed according to the characteristics, so that specific pollutants such as ammonia nitrogen, phosphorus, fluorine and Mn < 2 + > can be fixed, the reduction of heavy metals is realized, the nutrients beneficial to plant growth are reserved, the artificial soil with rich nutrients is synchronously reconstructed, the qualitative change from waste residues to resources is realized, the process is simple, and the effect is good. The obtained artificial soil can be used for greening planting, supplementing manganese ore, aluminum ore and phosphorite surrounding soil deficiency areas, and solving the problems of no soil, ploughability and ecological restoration of mining areas.

The invention discloses a green mixed crystallization dihydrate wet-process phosphoric acid production process, which at least comprises a reaction process and a filtration process, in the reaction process, phosphoric ore pulp prepared from raw material phosphorite, sulfuric acid and returned acid from the filtration process are added into circulating slurry in multi-grid reaction tanks connected in series for reaction to obtain reaction slurry, and the reaction slurry is filtered by the filtration process to obtain the green mixed crystallization dihydrate wet-process phosphoric acid. One part of the reaction slurry discharged from the last grid of the reaction tank is fed into a plurality of grids of digestion tanks which are connected in series to eliminate supersaturation, and then is fed into a subsequent filtering process, and the rest part of the reaction slurry is fed back into the first grid of the reaction tank as circulating slurry, and the reaction process is divided into two stages, by controlling the ion product Q of Ca < 2 + > and SO4 < 2-> in the reaction slurry and eliminating the degree of supersaturation, the adding opportunity and the adding amount of the phosphoric ore slurry and the sulfuric acid can be well controlled, and the product quality is well improved while the consumption of the sulfuric acid is reduced.

The present invention belongs to the technical field of phosphate ore beneficiation and relates to a large-scale process method for a siliceous-calcareous phosphate ore spiral chute. Specifically, it includes: (1) Raw ore desliming: The raw ore is deslimed, and the deslimed raw ore enters the next step; (2) Classification and gravity separation: The deslimed raw ore is classified into several relatively narrower particle sizes according to certain conditions, and the products of each particle size are respectively subjected to gravity separation using a chute (with a diameter greater than 1200 mm). The concentrates and tailings after gravity separation of the products of each particle size are respectively combined into gravity separation concentrates and gravity separation tailings; (3) Flotation of gravity separation products. The present invention adds desliming and classification and gravity separation operations, which can effectively reduce the problem of entrainment of fine particle sizes in each strip in the chute (with a diameter greater than 1200 mm) and the problem of poor separation accuracy of the chute (with a diameter greater than 1200 mm) caused by equal-settling particles, improve the grade difference between the concentrates and tailings separated by the chute (with a diameter greater than 1200 mm), enhance the adaptability of the reagents in the subsequent flotation process, and improve the fluidity of the flotation foam.

The invention discloses a beneficiation method of high-quality phosphoric ore pulp for producing hemihydrate-dihydrate phosphoric acid, and relates to the technical field of phosphorite beneficiation. The method comprises the following steps: primarily crushing medium-low-grade collophanite, grinding and grading to obtain flotation pulp; after sulfuric acid and a reverse flotation collecting agent are added into flotation pulp for pulp mixing and mineralization, the flotation pulp is pumped into a roughing flotation column for roughing, and roughing concentrate is obtained; the roughing concentrate is subjected to size mixing and pumped into a cyclone set to be subjected to cyclone classification, and sand setting ore pulp with sesquioxide reduced is obtained; carrying out size mixing on the sand setting ore pulp, and pumping the ore pulp into a fine flotation column to obtain fine phosphoric ore pulp; concentrating the concentrated ore pulp through a thickener, pressurizing and filtering, and supplying the concentrated ore pulp to a semi-hydrated-dihydrated phosphoric acid device for use. A flotation column is adopted for roughing, part of sesquioxide in the phosphoric ore pulp is removed through low-pressure rotational flow grading, deep magnesium removal is conducted through a fine selection technology, magnesium oxide in the ore pulp is further reduced, and the phosphoric ore pulp meeting the production requirement of the semi-hydrate-dihydrate phosphoric acid technology is obtained through concentration and filter pressing dehydration of a thickener.

The invention discloses a phosphoric acid production process which comprises the following steps: S1, mixing phosphoric acid and phosphorite in a reactor for reaction, and filtering and washing reaction liquid to obtain monocalcium phosphate filtrate; s2, the monocalcium phosphate filtrate enters a bipolar membrane electrodialyzer, the bipolar membrane electrodialyzer is formed by sequentially arranging a cation exchange membrane, an anion exchange membrane and a bipolar membrane, and an acid chamber, a salt chamber and an alkali chamber are formed respectively; the monocalcium phosphate is converted into phosphoric acid and calcium hydroxide under the action of the electrodialyzer. According to the method, phosphoric acid with relatively high purity can be directly prepared, and phosphogypsum is not generated. Compared with the traditional wet-process phosphoric acid, the produced solid waste amount is sharply reduced and is about one tenth to one twentieth of that of the traditional wet-process phosphoric acid, and the phosphoric acid is rich in silicon, magnesium, iron and the like and can be used as a fertilizer additive.

The invention discloses a method for smelting yellow phosphorus and alloy by using high-magnesium low-grade phosphorite, which comprises the following steps of: proportioning the high-magnesium low-grade phosphorite, a calcium flux, a siliceous flux, iron ore and a carbonaceous reducing agent, and carrying out reduction smelting treatment, so that part of apatite is reduced to generate yellow phosphorus steam, and part of phosphorus steam and reduced iron are chemically combined to form the alloy; calcium oxide, magnesium oxide, silicon oxide and aluminum oxide form low-melting-point smelting slag, and activated slag is obtained through water quenching. The method can provide technical reference for efficient resource utilization of low-grade phosphorite, especially high-magnesium and high-iron type low-grade phosphorite, three products of high-quality yellow phosphorus, high-added-value ferrophosphorus and activated smelting slag are obtained at the same time, and no new solid waste is generated in the process.

The invention discloses a phosphorite mining method which comprises the following steps: constructing and cutting an uphill along a top plate of an ore body from a lower layered gate way to an upper layered gate way, and supporting by adopting a resin anchor rod, a reinforcing mesh and a mining anchor cable; cutting groove construction is conducted, medium-length holes are formed in the lower layered gate way, explosives are loaded in the medium-length holes to conduct blasting layer by layer, a cut uphill bottom plate is continuously lowered till an ore body bottom plate is reached, and the cutting grooves are formed; fan-shaped medium-length holes are constructed in the lower layered gate way, a plurality of rows of fan-shaped medium-length holes are formed in the vertical direction, a plurality of holes are formed in each row of fan-shaped medium-length holes in the vertical direction, blasting is conducted with the cutting groove as a vertical free face, and the fan-shaped medium-length holes are blasted in batches; and charging powder in the lower layered roadway, and after blasting, entering a stope by adopting a remote control forklift for ore removal. The vertical free surface blasting technology is adopted for blasting the medium-length holes in batches, and the method has the advantages that the top plate operation safety is improved, the mining period is shortened, and the ore recovery rate is increased.

The present application belongs to the field of phosphate ore filling mining, and particularly relates to a phosphate ore deposit bottom pillar and ore block coordinated stage empty field subsequent filling mining method, which comprises the following steps: dividing the ore bed into a plurality of ore blocks along the strike of the ore bed, wherein the ore block comprises an ore room and a bottom pillar; constructing a roadway for transportation and ventilation; first mining the ore bed with a smaller rock mass strength coefficient and filling; retaining or blasting the interlayer; mining the ore bed with a larger rock mass strength coefficient and filling; and mining the ore bed in the bottom pillar of the previous middle section. The present application does not need to fill the empty area formed by the bottom pillar recovery, can reduce the filling process and filling material, reduce the filling cost and construction process, and improve the mining efficiency. The present application can realize the full mining of the ore bed, does not leave the top pillar, and recovers the bottom pillar without filling, so that the ore recovery rate is close to 100%, and good economic benefits can be achieved.

The invention discloses a method for recovering valuable elements in phosphorite step by step through gradient acid leaching, which comprises the following steps: firstly, mixing high-magnesium phosphorite and high-silicon phosphorite in proportion for ore blending, and carrying out crushing, grading and ball milling until the particle size is less than or equal to 200 meshes; then, adopting a gradient acid leaching process: (1) leaching with low-concentration inorganic acid (1-3wt%), and preferentially and selectively removing dolomite and calcite to obtain phosphate concentrate and leachate rich in calcium and magnesium; (2) leaching the phosphate concentrate by using medium-concentration inorganic acid (5-8wt%), and dissolving the phosphate concentrate to obtain a phosphate concentrate leachate and residues mainly containing iron, aluminum and silicon; and (3) leaching the residues by using high-concentration inorganic acid (30-40wt%) to obtain silicon-rich residues and a leaching solution rich in iron and aluminum. (4) neutralizing and carbonizing the calcium-magnesium leaching solution, and respectively precipitating and recovering magnesium hydroxide and calcium carbonate; (5) carrying out fractional precipitation on the phosphate concentrate leachate to obtain rare earth enrichment and calcium hydrogen phosphate; (6) carrying out alkali dissolution and carbonization reaction on the silicon-rich slag to prepare high-purity white carbon black; and (7) carrying out iron powder reduction, neutralization aluminum removal and oxidation iron precipitation on the iron and aluminum lixivium to prepare the battery-grade iron phosphate. The method is simple and convenient to operate, energy-saving and environment-friendly, various valuable elements in the phosphorite are efficiently recycled, and the economic added value of phosphorite resources is increased.

The invention discloses a long-acting stable filling agent for phosphorite mining and a preparation method and application thereof, the long-acting stable filling agent takes cement, slag powder, phosphogypsum and fly ash as matrix components, and is supplemented with additives such as a nano modified liquid, a retarder and an early strength agent. The 3d compressive strength reaches 4.6-5.5 MPa, the 28d compressive strength reaches 13.5-15.5 MPa, the 90d strength retention rate in a simulated acid environment is larger than or equal to 84%, the volume shrinkage rate is smaller than or equal to 0.5%, and the early strength and the excellent long-term acid-resistant stability are both high. Through a synergistic effect of a nano-micron composite structure, pores are filled with nano particles and secondary hydration is promoted, basalt fibers are bridged to resist cracking, and nano montmorillonite blocks acid etching, so that unification of high early strength and long-acting acid resistance is realized. The material is simple and convenient in preparation process, can be efficiently used for mining and filling of phosphorite mountains, and meets the requirements of rapid support and long-term acid medium erosion resistance.

The invention belongs to the field of phosphorite mountain mining, and relates to a mining method suitable for a gently inclined thick and large phosphorite body containing a soft interlayer, which comprises the following steps: carrying out stope division and pseudo-inclined strip arrangement, dividing the ore body into manageable mining units, and optimizing a stoping sequence and a filling strategy; roof pre-cutting construction and roof supporting are conducted, a top ore bed is stoped and supported, and the stability of a roof is controlled; stoping the chambers, extracting the ores in the chambers, and adopting different stoping modes according to the thicknesses of the clamped ores, so as to maximize the ore recovery rate and minimize the loss; clamping stone processing and transferring are conducted, processing is conducted according to the thickness of the clamping stone, the clamping stone is removed to improve the ore grade, or the clamping stone is reserved; a filling retaining wall is constructed, and a retaining wall is arranged in the mined-out area after stoping; and subsequent filling and pillar stoping are conducted, the goaf is filled with filling materials, surrounding rock is supported, and pillars are stoped to achieve comprehensive recovery of resources. The problems that a traditional method is high in depletion rate, difficult in roof control and poor in adaptability are solved, and the mine production efficiency is remarkably improved.

The invention discloses a positive and double reverse flotation process for removing silicon, magnesium, iron and aluminum from phosphorite, and relates to the technical field of phosphorite flotation. High-grade phosphate concentrate, low-grade phosphate concentrate and tailings are obtained by performing direct flotation desiliconization, reverse flotation magnesium removal in acidic ore pulp and secondary reverse flotation iron and aluminum removal in the acidic ore pulp on phosphorite under a weak alkali condition. The method specifically comprises the following steps: crushing and grinding collophanite to obtain flotation raw ore pulp; adding sodium carbonate serving as a pH regulator, sodium silicate serving as an inhibitor, MON-135 serving as a collecting agent and LSD-Z serving as a synergist into the raw ore pulp to obtain positive flotation tailings and desiliconized phosphate concentrate pulp; a pH regulator sulfuric acid is added into the desiliconized phosphate concentrate pulp, the pH value is regulated to be 4-5, then a reverse flotation collecting agent LAA-T is added, and reverse flotation tailings and magnesium-removed phosphate concentrate pulp are obtained; and after a collecting agent E1310P is added into the magnesium-removed phosphate concentrate pulp to be fully mixed and mixed, high-grade phosphate concentrate and low-grade phosphate concentrate are obtained through secondary reverse flotation, the grade of phosphorus in the high-grade phosphate concentrate is larger than 30%, the recovery rate of P2O5 is larger than 50%, and the MER value is smaller than 0.08.

The utility model relates to the technical field of phosphorite treatment, in particular to a device and system for preparing ammonium phosphate and byproduct nitrophosphate fertilizer by decomposing phosphorite with nitric acid. The device comprises an acidolysis tank, the acidolysis tank is connected to a first separator, the first separator is connected to a first crystallizer, the first crystallizer is connected to a second separator, the second separator is connected to a decalcification tank, the decalcification tank is connected to a denitration tank, and the denitration tank is connected to a second crystallizer. The denitration tank is respectively connected to the repulping tank and the purification equipment; the re-pulping tank is connected to a neutralizing tank, and the neutralizing tank is connected to a first concentrator; and the purification equipment is connected to the second concentrator. According to the device disclosed by the invention, the mother liquor generated by the acidolysis tank is deeply processed to prepare monoammonium phosphate and purified phosphoric acid, meanwhile, a byproduct white fertilizer can be processed into a phosphorus (potassium) nitrate fertilizer, and a byproduct white gypsum is obtained.

The invention discloses a microbial carrier and a preparation method thereof, a composite microbial agent and a preparation method and application thereof, the microbial carrier provided by the invention takes a cross-linked body formed by cross-linking a phosphorite thermal activation product and a cross-linking agent as the microbial carrier, and the phosphorite thermal activation product is obtained by carrying out thermal activation, water quenching and grinding on phosphorite. A phosphorite thermal activation product obtained after phosphorite is subjected to thermal activation treatment has a porous structure, calcium, magnesium, silicon and slow-release phosphorus in the phosphorite thermal activation product are easily absorbed and utilized by functional microorganisms, a three-dimensional network porous structure is obtained after the phosphorite thermal activation product is cross-linked with a cross-linking agent, the loading rate of the functional microorganisms can be increased, and the utilization rate of the functional microorganisms is increased. In addition, good biocompatibility of the microbial carrier provides a suitable growth environment for functional microorganisms, survival and reproduction of the microorganisms in the gel are facilitated, and good application value and application effect are achieved.

The invention discloses a method for improving phosphorite reaction activity and fluorine resource recovery rate. The method mainly aims at medium-low-grade collophanite after flotation, and comprises the following steps: firstly, pretreating phosphorite by using fluosilicic acid to prepare high-concentration phosphorite slurry; carrying out premixing reaction on the phosphoric ore pulp and phosphoric acid, and then carrying out crystallization reaction with sulfuric acid with a certain concentration; a flash cooling and flue gas washing system is arranged in each reaction area, so that escape and recovery of fluorine are enhanced; and after the reaction is finished, filtering and washing to obtain phosphoric acid and phosphogypsum. The phosphorite is pretreated by using low-concentration fluosilicic acid recovered in a phosphoric acid concentration section, the phosphorite pre-decomposition pH is adjusted by using fluosilicic acid, carbonate, silicate and quartz impurities in the phosphorite are preferentially dissolved, and micro-channels are formed on the surfaces of phosphorite particles, so that the subsequent use amounts of phosphoric acid and sulfuric acid are reduced, and the content of aluminum phosphate ions in the product is reduced; the phosphorite acidolysis efficiency is improved. Meanwhile, introduction of fluosilicate accelerates escape of fluorine in phosphorite, and the fluorine yield of the system is increased.

The invention belongs to the technical field of phosphorite beneficiation, and relates to a collophanite re-flotation combined selection and middle grading quality-grading flotation method. According to the technical scheme, the method comprises the steps that phosphoric ore pulp is fed into a spiral chute set to be reselected, reselected products including reselected concentrate and reselected tailings are obtained, then the reselected concentrate obtained through separation is fed into a flotation dealumination procedure, reselected concentrate and tailings are obtained, the tailings obtained after reselected flotation are fed into a grading and grading procedure, and tailings 1 and middlings are obtained. And then the middlings and the spiral chute heavy tailings are combined and enter a heavy tailing flotation dealumination procedure, and heavy tailing concentrates and tailings 2 are obtained. The process has the advantages that the mixed heavy, fine and heavy tailings can be effectively classified in the industrial production, so that the flotation comprehensive recovery rate in the industrial production is effectively improved, and the flotation auxiliary material cost is reduced.

The invention discloses a phosphorite ore blending optimization method based on a multi-modal large model and intelligent interaction hardware. The phosphorite ore blending optimization method comprises the following specific steps: 1) collecting related parameters; 2) dynamically optimizing and inputting the multi-modal large model; and 3) dynamically optimizing and outputting the multi-modal large model. The invention relates to the field of methods, in particular to a phosphorite ore blending optimization method based on a multi-modal large model and intelligent interaction hardware, and particularly relates to a phosphorite ore blending optimization system and method based on the multi-modal large model. Through fusion of deep learning, conditional constraint planning and intelligent interaction hardware, multi-target dynamic optimization of phosphate ore blending is realized, and the method is suitable for low-cost ore blending scheme generation under multi-index constraints of phosphorus pentoxide (PO), magnesium oxide (MgO), arsenic (As) and calcium oxide (CaO).

The invention relates to a combined inhibitor for reverse flotation magnesium removal of medium-low grade phosphorite and application thereof. The combined inhibitor comprises sodium sulfate, 1, 2, 4-butanetricarboxylic acid and sulfuric acid. The application method comprises the following steps: grinding raw ore, adding water and mixing to obtain ore pulp; the pH of the ore pulp is adjusted, then the combined inhibitor is sequentially added and mixed, then a collecting agent is added and mixed, flotation is conducted, and phosphate concentrate and phosphate tailings are obtained; the flotation process comprises one-time rough flotation, at least one-time fine flotation and at least one-time scavenging; the combined inhibitor provided by the invention is good in calcium and magnesium interference resistance and high in selectivity, the dosage of sulfuric acid is remarkably reduced, the pH value of ore pulp is increased, magnesian gangue in phosphorite is effectively removed through the synergistic effect of all the components, the grade of phosphate concentrate is increased, meanwhile, the recovery rate is high, and the combined inhibitor has good industrial application prospects.

The present invention discloses a method for preparing anhydrous iron phosphate from medium and low grade phosphate rock, which comprises the following steps: Step 1: Provide medium and low grade phosphate rock; Step 2: Mix the phosphate rock with hydrochloric acid in a decomposition tank and fully react to obtain a first slurry; Step 3: Place the first filtrate into a sedimentation tank; Step 4: Add mixed acid to calcium dihydrogen chloride phosphate crystals, carry out pulping and filtration to obtain a second filtrate and a filter cake; Step 5: Finally, filter to obtain a gypsum product and a third filtrate; Step 6: The third filtrate in Step 5 is purified with saturated ferrous sulfate. The fourth filtrate obtained through a microfilter is continuously added with a saturated ferrous sulfate solution, then continuously added with 5-25% hydrogen peroxide, reacted for 5-35 minutes, then added with sodium hydroxide solution to adjust the pH value to 1.9-2.1, and kept warm and continuously reacted for 3-6 hours, and the iron phosphate obtained by filtration; Step 7: Dry the iron phosphate obtained in Step 6 at 150-170 °C to obtain anhydrous iron phosphate.