405 results about "Yellow phosphorus" patented technology

The invention discloses a yellow phosphorus tailing-based mine filling material and application thereof. The yellow phosphorus tailing-based mine filling material comprises aggregate and a cementing material, the cementing material comprises the following components in parts by mass: 5-20 parts of red mud, 20-40 parts of yellow phosphorus slag, 10-30 parts of slag, 5-10 parts of fly ash, 5-10 parts of a compound exciting agent, 1-3 parts of an early strength agent and 2-5 parts of a water-retaining agent; wherein the compound exciting agent comprises the following components in parts by mass: 10-20 parts of sodium metasilicate, 30-40 parts of gypsum powder, 20-30 parts of sodium sulfate, 5-10 parts of carbide slag and 5-10 parts of silica fume; according to the invention, the raw materials are compounded and the specific exciting agent is subjected to depolymerization-polycondensation reaction to obtain a cementing material containing Aft (ettringite), C-S-H gel (hydrated calcium silicate gel) and C-A-S-H gel (hydrated calcium aluminosilicate gel), and finally, the mine filling material with high fluidity, low bleeding rate and high strength is obtained while yellow phosphorus tailing solid waste is treated.

The invention discloses a yellow phosphorus furnace electrode paste and a preparation method thereof, and belongs to the technical field of yellow phosphorus furnace production, the yellow phosphorus furnace electrode paste comprises the following raw materials by mass: 55-65% of anthracite particles, 20-25% of petroleum coke, 5-10% of graphite chips, 18-25% of a composite binder, 0.3-1.5% of a composite antioxidant and 1.5-4.5% of an additive; the yellow phosphorus furnace electrode paste provided by the invention is produced according to the preparation method provided by the invention, and the resistivity, compressive strength and oxidation resistance can be synchronously improved through the design of carbon material multistage particle size distribution, a nano-reinforced composite binder and a synergistic anti-oxidation system in combination with an efficient drying and densification process; the problem that an existing electrode paste is poor in density and performance is effectively solved.

The utility model provides a closed circulation treatment and recycling system for yellow phosphorus production sewage, which relates to the technical field of yellow phosphorus production equipment and comprises a sewage collecting mechanism, a composite gravity settling mechanism, a composite flocculation settling mechanism and a cooling mechanism, the device is characterized in that the composite gravity settling mechanism and the composite flocculation settling mechanism are both in a closed state, and the top of each mechanism is provided with an independent air exhaust cooling pipeline (1) and an air inlet pipe (2) which is ventilated in a one-way mode from outside to inside; a two-stage autonomous settling structure is arranged, so that the flowing path of sewage is effectively increased within a limited distance and space, and the autonomous settling time is prolonged; by utilizing the height difference between the filter (21) and the cooling water tank (27) and the negative pressure generated by the suction pipeline when the supplemented cooling water falls, the sewage is pumped out of the filter (21), and meanwhile, the closed spaces of the mechanisms are promoted to carry out gas flow and gas exchange, so that the interior of the closed structure is cooled.

The invention relates to the technical field of yellow phosphate rock powder clustering, in particular to yellow phosphate rock powder clustering equipment which comprises a base, a support is fixedly mounted at the top of the base, and spherical rotary drums are rotatably connected to the two sides of the inner wall of the support in a penetrating mode; a storage cylinder is fixedly mounted at the top of the support, a connecting pipe is rotatably connected into the storage cylinder in a penetrating mode, a quantifying cylinder is fixedly connected to the bottom of the connecting pipe, and a discharging assembly is arranged at the bottom of the quantifying cylinder. By arranging a quantitative barrel, a first through groove, a second through groove and a discharging assembly, the quantitative barrel is rotated to enable the first through groove to be aligned with the second through groove, an adhesive enters a connecting pipe through the first through groove and the second through groove, then the adhesive enters the quantitative barrel, scale marks are arranged outside the quantitative barrel, and after the liquid level in the quantitative barrel reaches a proper value, the adhesive is discharged. The quantitative barrel is rotated to enable the first through groove and the second through groove to be staggered, and the adhesive is quantitatively discharged into the spherical rotating barrel through the discharging assembly, so that the adding amount of the adhesive is controlled, and the agglomeration quality of the yellow phosphate rock powder is improved.

A synthesis method for phosphorus pentafluoride and a synthesis device therefor. The synthesis method comprises: continuously feeding hydrogen fluoride, liquid chlorine and liquid yellow phosphorus into a reactive distillation tower to perform a reaction, so as to obtain phosphorus pentafluoride gas, wherein the molar ratio of hydrogen fluoride, liquid chlorine and liquid yellow phosphorus is 8-12:4-6:1-3. By using hydrogen fluoride, liquid chlorine and liquid yellow phosphorus as raw materials, liquid yellow phosphorus reacts with liquid chlorine in advance in a reactive distillation tower and the resulting product then reacts with hydrogen fluoride, thereby synthesizing phosphorus pentafluoride gas by means of a one-step method. The preparation process is simple, and the synthesis device has a stable and reliable structure and is very suitable for large-scale production, implementation and use.

The invention discloses a granular soil conditioner capable of improving acid and passivating aluminum and a preparation method of the granular soil conditioner, and belongs to the technical field of soil improvement. The invention provides a preparation method of a granular soil conditioner for modifying acid and passivating aluminum. The preparation method comprises the following steps: uniformly mixing alkaline phosphate tailing powder, silicon-based yellow phosphorus slag powder, silicate minerals and a carbon source conditioner to obtain a mixed powder material; the mixed powder material is soaked in an alkali solution for alkali modification treatment, and an alkali modified conditioner is obtained; soaking the alkali modified conditioner in a chitosan solution, and reacting to enable functional groups of chitosan to be attached to the surface of the alkali modified conditioner, so as to obtain a chitosan modified conditioner; and adding a binder into the chitosan modified conditioner, and granulating to obtain the acid-modified aluminum-blunt granular soil conditioner. The granular soil conditioner provided by the invention can be used for effectively improving acid soil and has relatively high capability of passivating aluminum.

The invention discloses a phosphogypsum-based calcination-free low-carbon cementing material and a preparation method thereof. The phosphogypsum-based calcination-free low-carbon cementing material comprises the following components in percentage by weight: 10%-35% of phosphogypsum, 10%-35% of desulfurized gypsum, 5%-20% of sewage treatment sludge, 10%-35% of fly ash, 10%-35% of yellow phosphorus slag and 5%-20% of phosphorus tailing slag. The total amount of the ardealite and the desulfurized gypsum is controlled within 45%, and the total amount of the fly ash and the yellow phosphorus slag is controlled within 45%. The technical problems that an existing phosphogypsum-based cementing material is low in early strength, poor in performance stability and high in cost are effectively solved through a multi-solid-waste synergistic compatibility design and a calcination-free process.

The invention discloses a method and equipment for dephosphorizing and desulfurizing yellow phosphorus tail gas, aiming at solving the technical problem of efficiently removing phosphorus-containing pollutants and sulfur-containing pollutants in the yellow phosphorus tail gas. Comprising the following steps: introducing yellow phosphorus tail gas into a dephosphorization device to remove phosphorus-containing substances in the yellow phosphorus tail gas, wherein the dephosphorization device adopts a first catalytic flue gas treatment device; introducing the dephosphorized flue gas into an organic sulfur hydrolysis conversion device to convert organic sulfur in the dephosphorized flue gas into H2S, wherein the organic sulfur hydrolysis conversion device adopts a second catalytic flue gas treatment device; and introducing the organic sulfur hydrolysis conversion flue gas into a desulfurization device to remove H2S in the organic sulfur hydrolysis conversion flue gas, wherein the desulfurization device adopts a third catalytic flue gas treatment device. The efficient continuous treatment of phosphorus-containing pollutants and sulfur-containing pollutants in the yellow phosphorus tail gas can be realized.

The application discloses a preparation method of high-purity yellow phosphor, which comprises the following steps: (1) adding pure water into a reaction kettle, adding liquefied yellow phosphor under the condition of heat preservation, starting a stirrer in the reaction kettle, and repeatedly rinsing the yellow phosphor to remove floating impurities; (2) introducing the rinsed yellow phosphor into a circulating fluidized bed reactor provided with a catalyst bed after fully mixing the yellow phosphor with an oxidizing agent through a mixer, fully contacting a mixed fluid of the yellow phosphor and the oxidizing agent with catalyst filling materials in the catalyst bed, and performing an oxidation-reduction reaction; (3) after the oxidation-reduction reaction is completed, the yellow phosphor is flowed back to the reaction kettle from the circulating fluidized bed reactor, and the yellow phosphor flowed back to the reaction kettle is pumped into the circulating fluidized bed reactor to circulate the above oxidation-reduction reaction; and (4) after the reaction is completed, the liquefied industrial yellow phosphor in the reaction kettle is left to be stratified, impurities are removed, refined yellow phosphor is separated, and high-purity yellow phosphor is obtained by rinsing with high-purity water.

The preparation method comprises the following steps: firstly, dissolving a carbon carrier and a nickel source in deionized water, and uniformly mixing the carbon carrier and the nickel source in an ultrasonic manner to obtain dark green turbid liquid; drying the dark green turbid liquid to obtain a dark green solid; roasting and screening the dark green solid to obtain a precursor with nickel oxide; putting the precursor into a quartz tube, putting the quartz tube into a tubular furnace, introducing hydrogen phosphide gas into the tubular furnace, and phosphating to obtain a NixPy electrocatalyst; the method is low in preparation cost, short in time and simple in process, the problem of yellow phosphorus tail gas emission is effectively solved, and production of green energy is promoted; the electrocatalyst has a good application prospect in the field of hydrogen production through electrocatalytic water decomposition.

The invention discloses a multi-source solid waste-based cementing material and a preparation method thereof, and relates to the technical field of solidified organic matter soft soil cementing materials. The cementing material is prepared from the following raw materials: carbide slag, desulfurized fly ash, yellow phosphorus slag, high-activity and high-stability steel slag, modified red mud, alkaline residues, desulfurized gypsum, mineral slag and calcium sulphoaluminate; the high-activity and high-stability steel slag is prepared by carrying out steel slag preliminary stabilization treatment and steel slag excitation activation on liquid steel slag; exciting and activating the steel slag: preparing high-activity and high-stability steel slag from the stabilized steel slag, the modified ettringite particles, aluminum sulfate, a polycarboxylate superplasticizer, hexadecyl triethyl ammonium bromide and potassium hydroxide; the modified red mud is prepared from red mud, magnesium hydroxide, N-methyldiethanolamine, desulfurized fly ash, calcium oxide and a ferric chloride solution; the modified ettringite particles are prepared from polyvinyl alcohol and N-beta-aminoethyl-gamma-aminopropyl trimethoxy silane as a modifying agent. The preparation method comprises the following steps: preparing the modified ettringite particles; according to the multi-source solid waste-based cementing material, the compressive strength and the water stability coefficient of the solidified organic matter soft soil are effectively improved.

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 water quenching treatment system and process for yellow phosphorus slag, relates to the technical field of yellow phosphorus preparation, and solves the problems that part of yellow phosphorus slag enters a slag flushing water tank together with water flow during slag-water separation in the conventional device and process, so that the yellow phosphorus slag is accumulated in the slag flushing water tank, and the water quenching effect is poor. The space utilization rate of the slag flushing water tank is low; and the slag flushing water tank is inconvenient to clean. The device comprises a slag water quenching assembly, a slag-water separation assembly and a circulation assembly, wherein the slag water quenching assembly, the slag-water separation assembly and the circulation assembly are sequentially connected through pipelines; the circulating assembly comprises a slag flushing water tank, the slag flushing water tank is respectively connected with the slag-water separation assembly and the slag water quenching assembly through pipelines, and a flushing pipeline is arranged in the slag flushing water tank. The device has the advantages of circulating flushing, good flushing effect and the like.

The invention relates to the technical field of curing agent preparation, in particular to a seawater-corrosion-resistant high-strength marine silt curing agent and a preparation method thereof.The curing agent is prepared from, by mass, 40-60 parts of a main body material, 10-15 parts of an activating agent, 2-8 parts of a coagulant and 2-5 parts of modified nano calcium carbonate; the main material is one of yellow phosphorus slag micro powder, magnesium smelting slag micro powder and blast furnace slag micro powder; the activating agent is one of phosphorus slag Portland cement, alkali-making white mud and papermaking lime slag; the coagulant is one of sodium chloride, magnesium chloride, potassium sulfate and magnesium sulfate. According to the prepared curing agent, the compactness of a cured sample can be improved, invasion of ions in seawater is reduced, nano calcium carbonate is coated with polydopamine, dispersion is uniform, and the subsequent hydration process is optimized.

The invention provides a mine filling cement material capable of cementing high-content phosphate tailings as well as a preparation method and a use method thereof, relates to the technical field of mine filling materials, and solves the technical problems that the existing mine filling cement material cannot shorten the setting time and improve the setting strength of the material while reducing the bleeding rate. The high-strength concrete is prepared from the following components: 40 to 45 weight percent of slag, 7 to 10 weight percent of metakaolin, 8 to 10 weight percent of yellow phosphorus slag, 0 to 5 weight percent of phosphogypsum, 35 to 40 weight percent of cement clinker, 1 to 5 weight percent of exciting agent and 1 to 5 weight percent of mineral admixture, the mineral admixture is prepared from bentonite, sepiolite and attapulgite. According to the invention, the setting time can be effectively shortened, the bleeding rate is effectively reduced, the filling time is shortened, the underground drainage and filling cost is reduced, the pollution to the water environment of a mining area is reduced, the effective utilization of the phosphate tailings is realized, and the stacking of the phosphate tailings and the environmental pollution are reduced; the condensation speed and the strength of the filling body can be effectively improved; the comprehensive performance of the material is improved.

The invention discloses microcrystalline glass and a preparation method thereof. The preparation method comprises the following steps: burdening: crushing and sieving yellow phosphorus slag, and uniformly mixing the yellow phosphorus slag with other raw materials to obtain a mixed raw material; melting: fully melting the mixed raw materials in a high-temperature furnace to form uniform molten glass; performing water quenching: performing water quenching on the molten glass liquid, and grinding the molten glass liquid into glass powder; molding: uniformly mixing the ground and sieved glass powder with a nucleating agent, and then loading the mixture into a mold for compression molding; and crystallization: placing the to-be-crystallized sample subjected to compression molding in a crystallization furnace for crystallization treatment, annealing, cooling to room temperature along with the furnace, and processing to obtain the microcrystalline glass product. The microcrystalline glass provided by the invention has excellent mechanical properties and chemical properties, and can be applied to the fields of architectural decoration and mechanical industry.

The invention discloses a catalytic flue gas treatment device and a yellow phosphorus tail gas purification system. The technical problem that the working efficiency of a catalytic flue gas treatment device is affected due to the fact that a catalyst in the catalytic flue gas treatment device needs to stand and dry for a long time after being washed and regenerated is solved. Comprising a reaction system, a regenerated liquid circulating system and a flue gas conveying system, the system further comprises a drying system, the drying system comprises a first air blower, a heater and a drying gas distribution pipe network, and the first air blower and the heater are connected with all the reactors through the drying gas distribution pipe network. Therefore, airflow generated by the first air blower is heated by the heater to form dried gas, and the dried gas enters the reactor after washing and regeneration of the catalyst and passes through the catalyst in the reactor. When the drying gas passes through the catalyst, the regeneration liquid attached to the catalyst is evaporated and discharged out of the catalyst along with the flowing of the drying gas to wash the regenerated reactor. And the drying time of the catalyst is shortened.

The utility model relates to the technical field of dry desulfurization, in particular to a yellow phosphorus flue gas sulfur dioxide removal system based on a calcium dry desulfurization technology, which comprises a desulfurizer bin, a discharge port of the desulfurizer bin is communicated with a first delivery pipe, the bottom end of the first delivery pipe is communicated with a three-way pipe, and the bottom end of the three-way pipe is communicated with a second delivery pipe. And the left side of the three-way pipe communicates with a first fan. Through cooperation of the filter box, the filter screen, the electric push rod and the cleaning brush, the pre-filtering function is achieved, after flue gas enters the filter box, the filter screen filters large impurities contained in the flue gas, then the electric push rod is controlled to work through the external controller, the output end of the electric push rod drives the cleaning brush to move downwards, and the flue gas is filtered out through the filter screen. The cleaning brush is used for brushing and sweeping impurities adhered to the surface of the filter screen, so that the pre-filtering work of the flue gas is completed, the flue gas can be fully mixed with a desulfurizing agent, and meanwhile, the dust remover cannot be blocked.

The present invention belongs to the technical field of phosphorus pentafluoride preparation, and specifically relates to a method for synthesizing phosphorus pentafluoride by using yellow phosphorus and fluorine gas. The synthesis method comprises the steps of dissolving yellow phosphorus in an inert solvent to prepare a yellow phosphorus solution, then passing the yellow phosphorus solution and fluorine gas into a microchannel reactor for mixed reaction, and separating and purifying the generated gaseous product through a pressurized condensation system to obtain phosphorus pentafluoride. The synthesis method of the present invention utilizes a specific inert solvent to dissolve highly reactive yellow phosphorus, and then continuously synthesizes phosphorus pentafluoride by reacting the yellow phosphorus solution with fluorine gas in a microchannel reactor through a gas-liquid phase reaction. The method has the advantages of low reaction temperature, high reaction efficiency, few reaction by-products, and high product yield.

The utility model discloses a yellow phosphorus filling lifting platform which aims at solving the problems that an existing loading platform is not matched with a tank car, and the operation risk of personnel is large. The platform comprises a filling frame and a lifting platform capable of vertically sliding, the filling frame and the lifting platform are connected through a servo electric cylinder, the filling frame is provided with a guide structure, a guardrail and an anti-collision assembly, and the anti-collision assembly is in control connection with the servo electric cylinder. A connecting beam is arranged on the top of the lifting platform, and servo electric cylinders are arranged on the two sides in pairs and connected through connecting rods. A mounting seat of the filling frame is provided with a limiting bearing and a limiting notch. The anti-collision assembly comprises an anti-collision rod and a limiting switch. The platform can adapt to different tank trucks through the lifting platform and the servo electric cylinder, so that people can get on and off the truck conveniently; the operation safety is improved through a guardrail and a lifting function; a servo electric cylinder, a connecting beam and the like guarantee stable lifting; the anti-collision assembly can prevent equipment from being damaged. The existing problems are effectively solved, and the safety and convenience of yellow phosphorus filling operation are improved.

The utility model discloses a yellow phosphorus electric furnace slag quenching device which comprises a slag flushing pool, the slag flushing pool is connected with a liquid inlet of a slag flushing box through a slag flushing pipe, a slag flushing valve and a slag flushing pump are sequentially arranged on the slag flushing pipe, a feeding port in the top of the slag flushing box is connected with a molten slag outlet pipe, and an outlet of the slag flushing box is connected with an inlet of a slag melting pool. A reflux inlet is formed in the bottom of the slag melting tank and connected with an inlet of the slag bin through a reflux pipeline, an outlet of the slag bin is connected with an inlet of the slag flushing tank through a pipeline, and a screen is further arranged in the slag melting tank; according to the utility model, large-particle slag can be intercepted on the upper surface of the screen through the screen and waits for continuous dissolution, and the slag which is dissolved into small particles falls down along screen holes of the screen, so that the phenomenon that the large-particle slag blocks a backflow pipeline, a slag flushing pipe, a valve and a pump can be avoided, and the service life of the slag flushing pipe is prolonged. The abrasion to the valve plate is correspondingly reduced, and the production efficiency is improved.

The application discloses a multi-layer dispersion combustion, high-efficiency energy-saving yellow phosphorus tail gas low-nitrogen burner and a multi-stage combustion method, and belongs to the technical field of energy saving and environmental protection. The mounting flange of the burner is connected with a furnace chamber. The burner comprises a cylinder body, the cylinder body is divided into a fuel cavity and a combustion-supporting cavity which are relatively independent through a transverse partition plate, the fuel cavity is used for conveying yellow phosphorus tail gas, and the combustion-supporting cavity is used for conveying high-pressure and high-speed combustion-supporting air. A center gun is arranged at the center of the cylinder body, an inlet end of the center gun is communicated with the fuel cavity, a plurality of layers of spray gun pipes are arranged, nozzles of a part of the spray gun pipes are staggered in height, and the nozzles of the spray gun pipes are oriented in different directions; a part of the spray gun pipes are provided with rotating blades; an air automatic rotating assembly is arranged at the outer periphery of an outlet end of the center gun and is communicated with the combustion-supporting cavity, and the air automatic rotating assembly is used for automatically and rapidly rotating the combustion-supporting air, so that the combustion-supporting air and the yellow phosphorus tail gas are fully mixed. The application solves the problems of yellow phosphorus tail gas ultra-low NOx and CO emission and yellow phosphorus tail gas blockage.

The utility model discloses a yellow phosphorus slag water quenching slag flushing tank, which belongs to the field of water quenching, and comprises a slag conveying device, a slag flushing tank mechanism and a slag flushing pool, a discharge port of the slag conveying device is connected with an inlet of the slag flushing tank mechanism through welding, and a flushing device is arranged on one side of the discharge port of the slag conveying device. Compared with the prior art, the device has the advantages that bodies of the fixed step groove A and the fixed step groove B are in contact connection and clamped with each other, and the groove opening of the fixed step groove A is located at the inner wall end of the slag flushing groove sub-groove feeding port; by means of the slope support, part of water spray cannot flow back into a gap between the fixed step groove A and the fixed step groove B when slag is flushed out, and due to the gradient of the slope support, it can be guaranteed that no water quenching solution remains in the slag flushing groove, and it is guaranteed that the slag flushing groove mechanism cannot leak water; due to the fact that the fixing column is connected with the slag flushing groove through hole in a sliding mode, the slag flushing groove can be freely detached.

The invention discloses a method for comprehensively recycling yellow phosphorus slag of an electric furnace, and belongs to the technical field of chemical engineering. Comprising the following steps: grinding slag, adding nitric acid in proportion, reacting dicalcium silicate in the slag with nitric acid to generate calcium nitrate and silicon slag, and reacting calcium nitrate with ammonium carbonate to prepare an ammonium nitrate product and a calcium carbonate product; and washing and separating the silicon slag to obtain orthosilicic acid, returning one part of orthosilicic acid to be re-blended with the phosphate ore to enter the furnace so as to recycle the slag, and calcining the rest part of orthosilicic acid to obtain a white carbon black product. The use amount of silica is reduced, mineral resources of silica are saved, and the use amount of silica produced from yellow phosphorus reaches self-balance.

The application discloses a kind of synthesis methods of high-purity electronic grade sodium hypophosphite, dilute phosphine gas is passed into to the mixed solution of sodium hypochlorite and sodium hydroxide that has been pre-cooled with sufficient stirring, and sodium hydroxide is added to carry out reaction;After reaction is completed, filtration, concentration, crystallization, separation are carried out, and the obtained product is purified by resin to obtain high-purity electronic grade sodium hypophosphite product.Compared with the traditional "yellow phosphorus-lime-soda" oxidation-reduction method for preparing industrial grade product and then preparing high-purity electronic grade sodium hypophosphite, the product purification difficulty of the application is low, by using 7N grade ultra-high purity phosphine without any metal impurities, the problem that arsenic, silicon, germanium, nickel, chromium and other metal impurities cannot be completely removed by traditional process can be effectively solved.In addition, the application also has the advantages of effectively solving the problem of three wastes, high recycling rate of by-products, high economy and the like.

The utility model relates to the technical field of environment-friendly treatment of industrial sewage, in particular to a yellow phosphorus production sewage circulating purification system, which is provided with a yellow phosphorus sewage tank, a multi-stage sedimentation mechanism, a concentration filtering mechanism and a clear liquid collecting tank which are sequentially arranged along a sewage treatment flow, the yellow phosphorus sewage tank is used for collecting yellow phosphorus production sewage; the multi-stage sedimentation mechanism is provided with a plurality of deep cone sedimentation machines which are arranged in series and are used for carrying out sedimentation separation on the conveyed yellow phosphorus sewage; the concentrating and filtering mechanism is used for concentrating and separating the conveyed settling floating liquid; and the clear liquid collecting tank is used for collecting the clear liquid separated by the concentrating and filtering mechanism and conveying the clear liquid to the phosphorus collecting tower through a water conveying pipe. Aiming at the special characteristics of yellow phosphorus production sewage purification treatment, the utility model constructs a closed circulation purification system, has the technical characteristics of greatly reducing the occupied area, being low in construction and operation cost and excellent in separation and purification effect, and has remarkable technical effect and economic benefit.

The invention discloses a selenium-rich rice mineral source soil conditioner and a preparation method thereof, and belongs to the technical field of soil conditioning materials. The conditioner comprises the following raw materials in parts by weight: 30-70 parts of biological activated yellow phosphorus slag, 1-1.5 parts of soluble selenium, 23-62 parts of an activating agent and 3-10 parts of a modifying agent. The method is characterized in that the biological activated yellow phosphorus slag is prepared by sequentially carrying out thermal activation and acid activation on yellow phosphorus slag and then carrying out solid-state fermentation by utilizing a compound microbial agent consisting of paenibacillus mucilaginosus, lactobacillus acidophilus and P.megatherium. Through unique biological activation modification, the industrial problems that a mineral source conditioner is low in granulation rate and slow in particle hardening and disintegration are solved in a synergistic mode, acid soil can be effectively improved, absorption and enrichment of rice on selenium are remarkably promoted, and high-added-value resource utilization of the yellow phosphorus slag is achieved.

A solid waste-based nano-hydrated calcium silicate nucleating agent, its preparation method, and its application in low-heat cement are disclosed. This invention belongs to the field of building materials technology. By weight, it comprises the following components: 10-30 parts of carbide slag, 20-45 parts of yellow phosphorus slag, and 400-2000 parts of sodium hydroxide solution. The calcium hydroxide content in the carbide slag is ≥80%. The silicon dioxide content in the yellow phosphorus slag is ≥35%, and the calcium oxide content is ≥40%. The pH value of the sodium hydroxide solution is 11-12. This invention uses carbide slag, yellow phosphorus slag, and sodium hydroxide solution as raw materials to synthesize a solid waste-based nano-hydrated calcium silicate nucleating agent. Utilizing its nano-sized hydrated calcium silicate as a seed crystal in the early stage of hydration in low-heat cement, it can provide nucleation sites for the hydrated calcium silicate gel, a product of low-heat cement hydration, reducing the nucleation barrier of the hydrated calcium silicate gel, promoting the hydration rate and early strength development of low-heat cement, and providing strong support for the later strength development of low-heat cement, effectively improving the problem of drying shrinkage cracking in low-heat cement.

The invention relates to the technical field of phosphorus chemical industry, and discloses a preparation method of ground phosphate rock drying-free cold-pressed pellets, which comprises the following steps: S1, feeding: putting prepared raw ground phosphate rock / washed ground phosphate rock / sintered ground phosphate rock into a stock bin (1) through a forklift for use; compared with the prior art, the drying-free adhesive for the ground phosphate rock pellets has the following advantages and effects that the ground phosphate rock wet pellets subjected to cold press molding after being added with the drying-free adhesive for the ground phosphate rock pellets can be quickly cured after being aired at room temperature, so that the compressive strength of the dry pellets is improved, the thermal stability of furnace charging is improved, the production process is simplified, the energy consumption is reduced, and the molding of the pellets is more stable and controllable; the production efficiency is improved, drying equipment does not need to be added, the equipment investment is reduced, the production cost is reduced, the pellet can replace phosphate ore to be used for producing yellow phosphorus in an electric furnace (submerged arc furnace), the pellet is uniform in particle size, has certain compressive strength and abrasion resistance and good heat resistance, the water content reaches 1% or below, and the power consumption of throwing into the furnace can be reduced.

The utility model relates to the technical field of heat energy recovery, and discloses a yellow phosphorus combustion heat energy recovery device which comprises a combustion tower, a gas conveying pipe is fixedly connected to the interior of the combustion tower, a filter box is fixedly connected to the outer wall of the gas conveying pipe, a filter screen is arranged in the filter box, a connecting pipe is fixedly connected to the interior of the filter box, and the connecting pipe is fixedly connected to the outer wall of the gas conveying pipe. An air blower is fixedly connected to the outer wall of the connecting pipe, a conveying pipe is fixedly connected to the interior of the air blower, a heating box is fixedly connected to the outer wall of the conveying pipe, a water outlet pipe is fixedly connected to the interior of the heating box, and a water supply assembly is arranged on the outer wall of the heating box and used for providing a water source. High-temperature waste gas enters the filter box through the connecting pipe, is filtered through the filter screen and enters the heating box through the connecting pipe, the air blower and the conveying pipe, the water pump is started to convey a water source to the heating box, the high-temperature waste gas is used for heating the water source, the effects of recycling the high-temperature waste gas and achieving gradient utilization of waste heat are achieved, and the heat energy utilization rate is increased.