67results about "Iron halides" patented technology

The invention discloses a process for separating and recycling scandium, manganese and iron in iron-manganese slag, and belongs to the technical field of metallurgical engineering and comprehensive utilization of secondary resources. The method comprises the following steps: crushing the iron and manganese slag, mixing the crushed iron and manganese slag with a chlorinating agent and a molten salt medium, and carrying out chlorination reaction at 600-850 DEG C, so that iron and manganese are converted into chlorides to volatilize, and scandium is enriched in the slag; the volatile gas is subjected to multi-stage gradient condensation, and manganese and iron concentrates are respectively recovered in different temperature intervals; and leaching-extracting the chlorination residues to obtain a scandium-rich substance. According to the method, source separation and collaborative recovery of iron, manganese and scandium are achieved through pyrogenic process chlorination-condensation, the problems that in a traditional wet process, metal interferes with one another, the process is long, and pollution is heavy are solved, and the method has the advantages of being short in process, small in pollution and high in recycling degree.

The invention provides a method for preparing a poly-aluminum and functional silicon material by activating coal gasification slag and waste hydrochloric acid through microwave synergistic mechanical force, and belongs to the technical field of industrial solid waste recycling. The method comprises the following steps that the coal gasification slag is sequentially subjected to microwave radiation treatment and ball milling, activated slag and waste hydrochloric acid are subjected to an acid leaching reaction, and aluminum-iron-containing leachate and silicon-rich slag are obtained; extracting the aluminum-iron-containing leaching solution to obtain an iron-rich organic phase and a purified aluminum chloride solution; performing thermal polymerization reaction on the purified aluminum chloride solution to obtain polyaluminum chloride; the method comprises the following steps: carrying out alkaline leaching reaction on silicon-rich slag and waste alkali liquor, adding a structure-directing agent into a sodium silicate solution, and sequentially carrying out aging, solution pH value adjustment and crystallization precipitation to obtain mesoporous silica. According to the method, the aluminum-silicon leaching rate is remarkably increased through microwave-mechanical force synergistic activation, synergistic and efficient treatment of the three kinds of waste including the coal gasification slag, the waste hydrochloric acid and the waste alkali liquid is achieved, the technological process is closed, the product additional value is high, and the environmental and economic benefits are remarkable.

The application discloses polymeric ferric chloride and a production process and application thereof, and preparation of the polymeric ferric chloride comprises the following steps: S1, mixing waste acid with iron oxide scale, adjusting acidity, heating and refluxing, and cooling to obtain a mixture; S2, adding an oxidizing agent and a stabilizer into the mixture, and continuously heating and reacting to obtain the polymeric ferric chloride; the stabilizer is a chitosan-desferrioxamine complex; the polymeric ferric chloride is prepared by using a catalytic oxidation method, the chitosan-desferrioxamine complex stabilizer is used to chelate Fe, the stability of the polymeric ferric chloride is improved, the hydrolysis of Fe is inhibited, and the process is beneficial to improving the total iron content in the polymeric ferric chloride and improving the flocculation effect of the polymeric ferric chloride in sewage treatment.

The invention relates to a method for producing iron chloride and aluminum chloride, characterized in that i) sludge ash containing at least one iron compound and aluminum compound is reacted with at least one alkali metal chloride and / or at least one alkaline earth metal chloride at a temperature of 200 to 1100 DEG C in an inert atmosphere, and ii) discharging and separating the formed iron chloride and aluminum chloride in an exhaust stream.

The invention discloses porous ferric fluoride, a preparation method and application of the porous ferric fluoride in a lithium ion battery, and belongs to the technical field of lithium ion batteries. The method comprises the following steps: stirring Lewis alkali and iron-containing Lewis acid under a heating condition to form a clear solution, adding a carbon source into the clear solution, and stirring to form uniform slurry; adding ammonium bifluoride, continuously stirring, alternately washing the obtained precipitate with ethanol and acetone, centrifuging until the supernatant is colorless and transparent, and drying to obtain a precursor; and finally, uniformly grinding the precursor, performing heat treatment, naturally cooling to room temperature, and fully grinding to obtain the porous ferric fluoride. The preparation process is simple and safe, the cost is low, the use of dangerous chemicals hydrofluoric acid and nitrogen fluoride is avoided, and large-scale synthesis can be realized; the prepared ferric fluoride has a porous morphology, is beneficial to electrolyte infiltration, ensures that the electrical contact between active particles is not influenced while the active material is in full contact with the electrolyte, and improves the electrochemical performance.

A method of making upgraded synthetic rutile (100) can include binding ilmenite ultrafine particles together with a binder to form green pellets (110). Iron can be reduced in the green pellets by heating the green pellets to a reducing temperature under a reducing atmosphere (120). The ilmenite ultrafine particles within the green pellets can be at least partially sintered together by heating the green pellets at a sintering temperature to form at least partially sintered pellets (130). Iron can be removed from the at least partially sintered pellets by leaching to form upgraded synthetic rutile (140).

The invention discloses a method for preparing an iron salt water purifying agent by using iron-containing waste acid, which comprises the following steps: mixing the iron-containing waste acid with an additional acid solution to obtain an iron salt raw material; then the ferric salt raw material and oxygen are subjected to a continuous flow reaction, and a ferric salt water purifying agent is obtained; the mass fraction of hydrogen ions in the ferric salt raw material in terms of hydrogen chloride is 4.8-8.5%; in the continuous flow reaction, the conveying flow rate of the ferric salt raw material is 500-2000kg / h, and the ratio of the conveying flow rate of the ferric salt raw material to the conveying flow rate of oxygen is 1000: (10-20); the temperature of the continuous flow reaction is 100-165 DEG C, and the pressure of the continuous flow reaction is 1.25-2 MPa. According to the invention, oxygen is taken as an oxidizing agent, the mass fraction of hydrogen ions in the ferric salt raw material is controlled in a specific range, the conveying flow rate of the ferric salt raw material is controlled in a specific range, and the pressure of continuous flow reaction is controlled in a specific range, so that the prepared ferric salt water purifying agent is high in Fe < 3 + > ion content; the content of free acid is low, and the content of insoluble substances is low.

This document provides all-solid-state batteries and their applications. [Solution] The all-solid-state battery is placed on the positive electrode side and has an ionic conductivity of 1 × 10⁻⁶ -4 S / cm~1×10 -2 The first solid electrolyte layer has a density of S / cm, and the negative electrode side has an ionic conductivity of 1 × 10⁻¹⁰. -3 S / cm~2×10 -2 The invention provides for an all-solid-state battery and its applications, which enable the solid electrolyte membrane in the all-solid-state battery to simultaneously satisfy high lithium-ion conductivity, excellent electrochemical oxidation-reduction stability, and excellent compatibility with the positive and negative electrodes, thereby improving the performance of the all-solid-state battery.

The invention discloses iron-based fluoride, a preparation method and application of the iron-based fluoride in a lithium ion battery, and belongs to the technical field of lithium ion battery electrode materials. Iron-based fluoride used for a conversion type positive electrode can be directly synthesized through a simple liquid phase reaction, the electrode material has good electrochemical performance under the room temperature condition, the ultrahigh discharge specific capacity of 656.7 mAh / g under the low current density of 0.1 C is achieved, and the discharge specific capacity of a battery still has 516.99 mAh / g after 100 cycles; the battery still has the specific discharge capacity of 302.28 mAh / g after circulating for 885 circles under the current density of 0.5 C; when the current density is gradually increased from 0.1 C to 5C, the specific discharge capacity still has the capacity of 352.7 mAh / g; the excellent rate capability and cycling stability show the application prospects of different scenes; the preparation method is simple, low in cost and beneficial to batch production.

Provided are new and improved novel processes and continuous ion exchange / continuous ion chromatography (CIX / CIC) systems for the separation of iron and zinc from electric arc furnace baghouse dust.

A device and method for efficient clean utilization of fluor carbon cerium ore double chlorination method, relate to the field of rare earth comprehensive utilization and recovery, the device is composed of a first continuous packing bed, pipeline device; second continuous packing bed; third continuous packing bed; first screw propelling type condenser; second screw propelling type condenser. Rare earth concentrate is chlorinated with aluminum chloride, carbon monoxide and chlorine gas generated in the first and second continuous packing beds in the third continuous packing bed. Chlorinated rare earth, aluminum fluoride and alkaline earth metal chlorides generated by chlorination reaction remain in the chlorination slag in solid form, and titanium tetrachloride, silicon tetrachloride and iron chloride leave the chlorination furnace in gaseous form. The gaseous chlorination products are condensed and recovered by the screw propelling type condenser. The solid phase products are separated by water immersion to obtain single rare earth chloride. The present application realizes the comprehensive utilization of rare earth elements and associated elements such as titanium, fluorine, silicon and iron in fluor carbon cerium ore, and no acid and alkali waste liquid and wastewater are generated in the reaction process, which has good environmental benefits.

i) A step of reacting sewage sludge incineration ash containing at least one iron compound and an aluminum compound with at least one alkali metal chloride and / or at least one alkaline earth metal chloride at a temperature of 200°C to 1100°C in an inert gas atmosphere, and ii) Step of extracting and isolating the iron chloride and aluminum chloride formed in the exhaust gas stream. A process for producing iron chloride and aluminum chloride, characterized by including the following:

The invention discloses a method and device for preparing ferric oxide from ferric trichloride, and the method comprises the following steps: carrying out sectional heating gasification on a ferric trichloride solid raw material to obtain ferric trichloride gas, and the sectional heating comprises first-section heating (350-400 DEG C), second-section heating (400-500 DEG C) and third-section heating (500-650 DEG C) which are connected in sequence; the ferric trichloride gas and oxygen are subjected to an oxidation reaction, the molar ratio of the ferric trichloride gas to the oxygen is larger than or equal to 4.4: 3, and an iron oxide product and mixed gas are obtained; and condensing and separating the mixed gas to obtain chlorine and ferric trichloride products. According to the method, the technical breakthrough of'preparing high from low 'is achieved through the synergistic effect of'segmented gradient gasification + excess ferric trichloride', the device gasifies ferric trichloride through the segmented heating furnace, gasification of ferric trichloride and impurity separation are effectively controlled, high-purity ferric oxide is prepared, and meanwhile high-purity ferric trichloride and high-purity chlorine are produced as by-products.

The application discloses a method for producing iron oxide red by using electroplating waste acid liquid as raw material and belongs to the technical field of resource recovery. The method comprises the following steps: pretreating iron filings of the electroplating waste acid liquid, evaporating and crystallizing to obtain ferrous chloride powder, removing impurities by using a high-efficiency adsorbent, and preparing iron oxide red by using an air oxidation method. The electroplating waste acid liquid can be effectively utilized, high-yield ferrous chloride raw material can be obtained, high-purity ferrous chloride raw material can be obtained, the content of metal impurities in the ferrous chloride is reduced by using the excellent specific adsorption capacity of the high-efficiency adsorbent, the loss of iron ions is avoided, the whole impurity removal process is safe and pollution-free, the purity of the raw material is ensured from the source, and high-quality iron oxide red can be obtained.

The invention discloses a waste lithium iron phosphate powder recycling method, a cathode material and a cathode piece, and belongs to the technical field of lithium ion batteries, the waste lithium iron phosphate powder is obtained by ball-milling a dried mixed material in inert gas, the mixed material comprises lithium iron phosphate powder, fluorine-containing plastic powder and carbon powder, and the fluorine-containing plastic powder and the carbon powder are subjected to ball-milling in inert gas. The lithium iron phosphate powder is recovered from waste lithium iron phosphate batteries. According to the method, the problems of high energy consumption, large pollution and poor performance of the existing recycling process are solved, the high-temperature heat treatment process required by traditional recycling is completely avoided, a local high-energy region is brought by mechanical energy generated by collision of grinding balls in the ball-milling process, chemical reaction can be induced under normal-temperature and normal-pressure conditions, and regeneration of the waste lithium iron phosphate battery is realized. The raw materials are wide in source and low in price, and energy consumption and cost are remarkably reduced.

The utility model relates to an iron-containing waste hydrochloric acid recovery device which comprises a feeding tank, a feeding pump I, an MF membrane component, an NF storage tank, a feeding pump II, an NF membrane component, a feed liquid circulating tank, a circulating pump, a membrane distiller and a hydrochloric acid condensation and collection component which are sequentially communicated through a conveying pipeline, the stock solution inlet is communicated with an iron-containing waste hydrochloric acid conveying pipeline, the stock solution outlet is communicated with an inlet of the feeding pump I, the concentrated water backflow inlet is communicated with a concentrated water outlet of the MF membrane assembly through a backflow pipeline, a produced water outlet of the MF membrane assembly is communicated with an inlet of the NF storage tank, and a produced water outlet of the NF membrane assembly is communicated with a hydrochloric acid recycling pipeline; a concentrated water outlet of the NF membrane assembly is communicated with an inlet of the feed liquid circulating tank, and an outlet of the feed liquid circulating tank is communicated with an inlet of the circulating pump. The method has the advantages that hydrochloric acid and ferric chloride in the iron-containing waste hydrochloric acid can be effectively separated and respectively recycled, no other agents are introduced or redundant waste is generated, and the operation is stable.

The invention discloses a comprehensive treatment method of chlorination dust collection slag, and relates to the technical field of solid waste purification treatment, and the method comprises the following steps: adding water into solid particles collected in a cyclone collector of a fluidizing chlorination furnace, and stirring to prepare slurry, so as to obtain slurry; conveying the slurry into a settling tank for settling separation to obtain supernate and bottom thick slurry; concentrating, oxidizing and filtering the supernate to obtain a ferric chloride solution; the bottom thick slurry is dried and separated to obtain light component particles and heavy component particles, the light component particles are mainly petroleum coke, the heavy component particles are mainly titanium slag and metal chloride, ore-coke separation and solid-liquid separation of the chlorinated slag are achieved, the solution is comprehensively utilized, and resources are fully utilized; water is saved, and the processing and disposal cost of the chlorinated slag is greatly reduced.

The present invention relates to a method of producing a cathode active material, comprising at least partially dissolving iron fluoride trihydrate (IFH) in a polar solvent, thereby obtaining a solution; adding water to the solution, thereby precipitating a compound comprising pyrochlore iron hydroxy-fluoride hydrate (Pyr-IHFH); separating the precipitated compound from the solution; and heating the separated, precipitated compound to a temperature between 50 and 400 °C, thereby obtaining the cathode active material comprising pyrochlore iron hydroxy-fluoride (Pyr-IHF), wherein adding water to the solution converts IFH to Pyr-IHFH. The invention further relates to a cathode active material comprising Pyr-IHF, a cathode comprising the cathode active material and a battery comprising the cathode.

The invention relates to a process for the recovery of phosphorus and iron compounds from iron phosphate-containing materials, characterized in that i) an iron phosphate-containing material is reacted with chlorine gas in the presence of a carbon source at a temperature of 300 to 900°C and ii) the chlorophosphorus compounds formed, in particular phosphorus oxychloride and optionally phosphorus trichloride and iron chloride, are discharged in the exhaust gas stream, and iii) the iron chloride and iv) the chlorophosphorus compounds are separated from the exhaust gas stream.

The invention relates to a preparation and synthesis method of a halide electrolyte coated stable ferric fluoride positive electrode material. The preparation method mainly comprises the following steps: (1) sequentially dissolving lithium chloride and indium chloride in deionized water according to a mass ratio, and reacting to obtain a precursor solution of Li3InCl6; (2) adding commercial FeF3 subjected to ball milling into the precursor solution in the step (1), and uniformly mixing and stirring; (3) freeze-drying the mixed solution in the step (2) to obtain solid powder; and (4) calcining the solid powder in the step (3) in a protective atmosphere at 400 DEG C to obtain the halide electrolyte coated ferric fluoride positive electrode material. The preparation method of the halide electrolyte coating is simple in process and mild in condition, and the cycling stability of the ferric fluoride positive electrode material in the sulfide solid-state battery is remarkably improved.

The present invention relates to the field of resource utilization, and provides a method and an apparatus for separating iron from a nickel-iron alloy. The method comprises the following steps: roasting a nickel-iron alloy in a chlorine atmosphere, to obtain a ferrous chloride melt and a solid slag, and separating the ferrous chloride melt therefrom, the mass of chlorine being 0.8-1.5 times the mass of the nickel-iron alloy, and the roasting temperature being 600-850 °C. Chlorine is introduced into the ferrous chloride melt to perform a chlorination reaction, converting the ferrous chloride melt into ferric chloride gas. The ferric chloride gas is then condensed to obtain a solid ferric chloride product. The described method for separating iron from the nickel-iron alloy implements preferential chlorination of the iron in the alloy by means of controlling chlorination conditions, converting same into molten ferrous chloride. The ferrous chloride is then converted into gaseous ferric chloride, which is cooled to obtain ferric chloride. The process is simple, the procedure is short, and high-quality ferric chloride is obtained.

The present invention relates to a method for obtaining phosphorus and iron compounds from LFP-containing and / or LFMP-containing materials, characterized in that: i) reacting an LFP-containing and / or LFMP-containing material with chlorine gas at a temperature of 300 to 900°C in the presence of a carbon source; and ii) conducting the chlorine-phosphorus compounds formed, in particular phosphorus oxychloride and any phosphorus trichloride, and iron chloride, into an off-gas stream; and iii) iron chloride and iv) Chlorine-phosphorus compounds are separated from the off-gas stream at various temperatures.

To provide an Fe-based positive electrode active material capable of high-voltage operation and a lithium-ion secondary battery containing the positive electrode active material, which contribute to improvement in energy efficiency.SOLUTION: A positive electrode active material is primarily composed of lithium-iron complex fluoride, and the lithium-iron complex fluoride is represented by the following formula (1). LixFeF(3+x) (1). In the formula (1), x is a number that satisfies the relationship 0.4≤x<1.5.SELECTED DRAWING: Figure 2

The application provides a positive electrode material, a preparation method thereof, a positive electrode sheet, a secondary battery and an electric device. The positive electrode material comprises an inner core, a first coating layer covering at least part of the outer surface of the inner core, and a second coating layer covering at least part of the outer surface of the inner core with the first coating layer. The material of the first coating layer comprises lithium and an X element. The material of the second coating layer comprises the X element and a Z element. By forming the first coating layer, residual lithium on the surface of the inner core can be eliminated. The first coating layer has a high oxygen vacancy formation energy, which can reduce or even avoid oxygen dissolution in the inner core, reduce or even avoid the side reaction between oxygen and electrolyte due to oxygen dissolution, and improve the cycle life and safety of the secondary battery. By forming a uniform protective film on the surface of the inner core with the first coating layer, the overflow of oxygen from the position without the first coating layer can be reduced or even avoided.

The invention provides a high-purity ferrous chloride and chromic chloride mixed crystal and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving carbon ferrochrome in a hydrochloric acid solution to obtain a strong acid dissolution solution; water is added for dilution, and the total concentration of iron and chromium is 100-200 g / L; adding a sodium dimethyl dithiocarbamate solution, stirring and reacting to generate sulfide precipitate, and filtering to remove the sulfide precipitate; concentrating the filtrate after impurity removal, arranging a permanent magnet outside or at the bottom of a crystallization container to ensure that a magnetic field generated by the permanent magnet can cover a main area of the solution, and carrying out magnetic field assisted crystallization; and after crystallization, carrying out solid-liquid separation, and drying to obtain the high-purity ferrous chloride and chromium chloride mixed crystal. The method has the advantages of being simple in technological process, high in impurity removal efficiency, low in target metal loss rate and good in safety, the ferrous chloride and chromium chloride mixed crystal with excellent purity can be prepared, and the method has good application prospects and large-scale popularization potential in the field of iron-chromium flow battery electrolyte.

The invention provides a method for recycling electroplating sludge containing copper, nickel, chromium, calcium and iron. The method comprises the following steps: grinding and screening electroplating sludge to obtain sludge powder, mixing carbonate, and then carrying out alkali roasting and water immersion washing to obtain a first solid and a first filtrate; mixing the first solid and chlorine salt, and performing chloridizing roasting and water leaching washing to obtain a second solid and a second filtrate; mixing the second solid and a reducing agent, and then carrying out high-temperature roasting and magnetic separation to obtain iron powder and calcium carbonate; the mixed iron powder and the second filtrate are subjected to a reduction reaction to obtain copper-nickel alloy powder; calcium carbonate and the first filtrate are mixed for a solid-liquid reaction, and a calcium chromate and carbonate solution is obtained. According to the method, the whole process surrounds roasting separation, although the implementation route is slightly long, the whole process is connected in order, selective separation and recovery of different metals are achieved, the recovery rate and the resourceful product quality are high, meanwhile, secondary waste does not exist in the process, retreatment is not needed, and secondary pollution cannot be caused.

The present invention provides a method and device for separating nickel and iron from a nickel-iron alloy. The method comprises the following steps: roasting the nickel-iron alloy in a chlorine-containing atmosphere to obtain a roasting residue and an iron- and nickel-containing vapor phase, wherein the roasting temperature is 900-1200°C, and the roasting duration is 60-180 min; performing multi-stage condensation on the iron- and nickel-containing vapor phase, and collecting a solid phase obtained from first-stage condensation to obtain a nickel chloride product; and collecting a solid phase obtained from second-stage condensation to obtain an iron chloride product, wherein the second-stage condensation follows the first-stage condensation, and the condensation temperature of the second-stage condensation is 100-200°C. In the method for separating nickel and iron from a nickel-iron alloy, during roasting, highly selective volatilization of iron and nickel is achieved by controlling the roasting temperature and the roasting atmosphere, while impurities retain in the residue. Subsequently, by performing staged temperature-controlled condensation on the vapor phase obtained by roasting, high-purity nickel chloride and iron chloride products can be obtained separately.

A method of making an Fe—Cr electrolyte includes a) oxidizing a carbon-containing Fe—Cr alloy with Fe2O3 or FeO; and b) treating the oxidized carbon-containing Fe—Cr alloy with FeCl3 or HCl or any combination thereof to produce a FeCl2—CrCl3 electrolyte. The method may also include treating, under reducing conditions, a starting material, such as chromite ore, with a carbon source to produce the carbon-containing Fe—Cr alloy. Additionally or alternatively, the method may include removing a portion of the FeCl2 from the FeCl2—CrCl3 electrolyte to obtain a selected iron to chromium molar ratio for the Fe—Cr electrolyte.

The invention discloses a method for preparing a ferric salt water purifying agent by utilizing iron-containing waste acid, which comprises the following steps: mixing the iron-containing waste acid with an additional acid solution to obtain a ferric salt raw material; and then carrying out continuous flow reaction on the ferric salt raw material and oxygen in the presence of a catalyst to obtain the ferric salt water purifying agent. A continuous flow reaction technology is adopted, oxygen is used as an oxidizing agent, the mass fraction of hydrogen ions in a ferric salt raw material is controlled to be within a specific range, the conveying flow speed of the ferric salt raw material is controlled to be within a specific range, and the pressure of continuous flow reaction is controlled to be within a specific range; the prepared ferric salt water purifying agent is high in Fe < 3 + > ion content, low in free acid content and low in insoluble substance content.

The invention discloses a method for step-by-step acidification lithium extraction and multi-element comprehensive recovery of lepidolite ore to solve the problems that the leaching rate of a large number of impurity elements in the acidification stage is high, and the difficulty and cost of subsequent lithium purification are increased. Comprising the following steps: (1) roasting lepidolite ore at 700-900 DEG C for defluorination to obtain defluorinated lepidolite ore; (2) the defluorinated lepidolite ore is subjected to primary acidification leaching, primary acidification leaching liquid and water leaching residues are obtained through the primary acidification leaching, and the primary acidification leaching enables the leaching rate of the lithium element to be larger than or equal to 90%, the leaching rate of the sodium element to be 50%-70%, the leaching rate of the potassium element to be 10%-30% and the leaching rate of the aluminum element to be 15%-30%; and (3) separating the primary acidification leaching solution from the water leaching residues, and carrying out subsequent treatment on the separated lithium-containing leaching solution to prepare a battery-grade lithium carbonate product, the primary acidification leaching comprises the steps that defluorinated lepidolite ore and concentrated sulfuric acid are mixed for acidification, the mass ratio of the concentrated sulfuric acid to the defluorinated lepidolite ore is (0.4-0.6): 1, and size mixing leaching is conducted after acidification.