168results about How to "High iron removal efficiency" patented technology

The invention discloses a process method for ultra-high purity alumina preparation by utilizing coal ash and comprehensive utilization of ultra-high purity alumina. In the process method, mechanical activation, flotation decarbonization, magnetic separation iron removal sulfuric acid aluminum lixiviation, solid-liquid separation, resin absorption iron removal, low-iron aluminum sulfate concentration, organic alcohol alcoholization acid washing, aluminum sulfate dehydration drying and aluminum sulfate high-temperature calcination are carried out on the coal ash so as to obtain ultra-high purity alpha-Al2O3, wherein the content of the Fe2O3 in the ultra-high purity alpha-Al2O3 is less than 2 ppm. By using the process method, the complicated purification problem that intermediate aluminum sulfate in the process of coal ash reclamation is necessarily subjected to a called Bayer circulation process is avoided, thereby simplifying the process flow, reducing the energy consumption, reducing the resource consumption and solving the technical problem of over-large secondary residue quantity accumulation. The process method has the advantages that the extraction efficiency is high, and the circulation recovery of organic alcohol and sulfuric acid and comprehensive utilization of byproducts such as resin and the like are achieved. In the invention, the process is simple, the process flow is short, the production process is easy to control, the content of the impurity in the product is low, and the quality of the product is stable.

The invention discloses a method for eluting Fe<3+> in a P204 extracting agent, and belongs to the technical field of hydrometallurgy. The method is based on the principle that the stability of complex generated in the reaction between Fe<2+> and the P204 extracting agent is lower than that of the Fe<3+>, and achieves the aim of eluting Fe<3+> in the poisonous extracting agent by adding a reducing reagent into the extracting agent; and the elution efficiency of the Fe<3+> is more than 80%, so that the Fe<3+> in the P204 extracting agent can be effectively removed. The method can be applied to the technology for extracting vanadium in stone coal by an acid leaching method, and the P204 extracting agent combined with the Fe<3+> is treated by the method, so that the vanadium extraction efficiency can be improved by more than 60%, and the extracting agent can be regenerated and recycled. Compared with the existing method for removing Fe by concentrated sulfuric acid of industry, the method has the advantages of being higher in efficiency for removing Fe by the reducing reagent, lower in requirement for equipment, less in pollution for environment and worth of being widely popularized.

The invention relates to a zinc smelting technology for a low-zinc high-iron roasting ore by a wet method. The technology comprises a leaching process, a purifying process and an electrolyzing process. The technology employs a smelting method that a wet method can solve the problem of lean impurity high-iron raw material, iron removal efficiency is high, and various production consumption and production cost are not increased. The quality of 58% qualified high-purity zinc is greater than or equal to 99.995%, and quality of 42% qualified high purity zinc is greater than or equal to 99.99%.

The invention discloses a dual-station tank type de-ironing device. According to the dual-station tank type de-ironing device, clean water is poured into a washing tank from a washing tank inlet, a horizontal moving plate is moved to a station A by a moving air cylinder, a magnetic column is submerged into the washing tank, a de-ironing motor drives the magnetic column to rotate at a high speed, so as to remove iron from the magnetic column, meanwhile, mud fluid to be de-ironed is poured into a de-ironing tank from a de-ironing tank inlet, the horizontal moving plate is pushed to the de-ironing tank by the moving air cylinder, a vertical moving plate moves downwards, so as to enable the magnetic column to be submerged into the mud fluid, the de-ironing motor drives the magnetic column to rotate at a high speed, so as to de-iron, the magnetic column is submerged into the washing tank again by the vertical moving plate and the moving air cylinder after de-ironing is completed, so as to wash off the adsorbed iron, and thus, a de-ironing process is completed. According to the dual-station tank type de-ironing device, the problems of the traditional equipment that de-ironing equipment is low in efficiency, the labor intensity is high and the degree of automation is low are solved, and meanwhile, the forming of an automatic production line is facilitated. The dual-station tank type de-ironing device has the advantages of simplicity in operation and high de-ironing quality.

The invention provides a method for preparing iron oxide red by utilizing a solution containing iron ions, wherein the iron ions are at least one kind of ferrous ions and ferric ions. The method comprises the following steps of: (1) adding the solution containing iron ions into a reactor; (2) adjusting the pH value of the solution to be 0.5-3.0; (3) adjusting the temperature in the reactor to be 180-220 DEG C, maintaining the temperature for a predetermined time at oxidizing atmosphere to obtain a solid-liquid mixture containing ferric oxides; and (4) carrying out solid liquid separation on the solid-liquid mixture to obtain an iron oxide red product. By utilizing the method, iron in the solution can be effectively recycled and the iron oxide red can be prepared.

The invention discloses a method and device for deironing continuously in slurry in a bi-twisting mode, and belongs to the field of magnetically separating solids in slurry. Magnetic bars in magnetic bar groups are placed in a slurry barrel for adsorbing scrap iron in slurry, and then the scrap iron adsorbed on the magnetic bars is removed. The method and device for deironing continuously in slurry in a bi-twisting mode are characterized in that the magnetic bars in the magnetic bar groups are arranged horizontally; one part of the magnetic bars in the magnetic bar groups are positioned in the slurry, and the other part of the magnetic bars are all exposed out of the liquid level of the slurry; the magnetic bar groups rotate, so that the scrap iron adsorbed on the part of magnetic bars exposed out of the liquid level of the slurry is removed. The method and device for deironing continuously in slurry in a bi-twisting mode, which are provided by the invention, have the beneficial effects that the skillful design of a sandwiched wall cavity enables the slurry in the cavity to be in contact with the magnetic parts maximally, and the magnetic force is applied to the slurry uniformly, and a preferable deironing effect is obtained; the magnetic parts rotate continuously so that deironing is carried out uninterruptedly, and the deironing efficiency is improved greatly; the stability is extremely high, and the maintenance cost is extremely low.

The invention relates to an iron extraction process from an aqueous acid solution containing ferrous ions. The acidic feed solution is first passed to a fluidized bed reactor for the oxidation of the ferrous ions preferably by microbes (Leptospirillum ferriphilum) to give ferric ions, followed by introducing the solution obtained to a concentrator for the precipitation of a compound containing ferric ions from the solution to give solid matter. The final product, i.e. solid matter containing ferric ions, is collected. In the process, the solution to be treated is passed through the fluidized bed at a flow rate sufficient for effective fluidization and mixing in the fluidized bed. Further, an apparatus for performing the iron extraction process is claimed. The carrier for the microbes may be activated carbon.

The invention discloses an ammonia desulphurization and denitrification process for flue gas by synchronization of complexing absorption and electrolytic regeneration and solves the problem of low absorption liquid regeneration efficiency in an existing synchronous ammonia desulphurization and denitrification process for the flue gas. The technical scheme includes that the flue gas is pressurized and then fed into a concentration tower to realize contact reaction with concentration liquid in the tower, the flue gas discharged from the concentration tower is fed into an absorption tower to realize contact reaction with cyclic absorption liquid in the absorption tower, the concentration liquid at the bottom of the concentration tower is subjected to deferrization through a first electrolytic reactor after reaction and then fed into an ammonium sulfate crystallization system, the absorption liquid at the bottom of the absorption tower is regenerated and then fed back to the upper portion of the absorption tower to serve as the cyclic absorption liquid, the concentration liquid enters an anode chamber of a reaction unit of the first electrolytic reactor to realize oxidation reaction and then enters a cathode chamber to realize a reduction reaction, and an electrolytic solution is discharged through a short outlet connection pipe of the reactor after reaction and fed into the ammonium sulfate crystallization system. The ammonia desulphurization and denitrification process for the flue gas by synchronization of complexing absorption and electrolytic regeneration has the advantages of simplicity, low investment cost and operation cost, high conversion efficiency and effectiveness in deferrization, desulphurization and denitrification.

The invention discloses a method for preparing basic ammonium aluminum carbonate hydroxide whisker and aluminum oxide whisker co-production liquid sodium silicate from bentonite, which comprises the following steps of: adding sulfuric acid solution to bentonite mineral powder which is taken as an initial raw material; reacting; then performing filtering separation; collecting an acid-leached filtrate and acid-leached filter cakes; adding salpeter solution and isoamyl alcohol to the acid-leached filtrate; performing liquid separation and collecting an aqueous phase to obtain aluminum salt solution; adding urea and a surface active agent to the aluminum salt solution; reacting; then, separating, washing and drying to obtain basic ammonium aluminum carbonate hydroxide whiskers; and calcining the basic ammonium aluminum carbonate hydroxide whiskers to obtain aluminum oxide whiskers. Aluminum oxide and silicon dioxide which are required by the method disclosed by the invention respectively come from bentonite ore, and other industrial raw materials do not need to be adopted, so that the production cost can be effectively reduced. The method disclosed by the invention has the advantages that the recovery rate is high; the yield of the aluminum oxide in the bentonite can reach at least 90 percent; and the yield of the amorphous silicon dioxide can reach at least 95 percent.

The invention provides a method for efficiently deironing coal ash. Fine powder of raw coal ash is sequentially subjected to reduction, magnetic separation and hydrochloric acid leaching treatment, thereby finally obtaining the coal ash with the Fe2O3 content less than 0.02%. The method has the beneficial effects that the technology operation is simple, and the deironing efficiency is high, so that the Fe2O3 content in the coal ash is reduced to be lower than 0.02%; the calcium impurity also can be removed; moreover, a molecular sieve prepared by utilizing the coal ash after deironing by the method is high in quality, and the Fe2O3 content is less than the commercial value; not only can a duct of the molecular sieve be prevented from being blocked by a ferrum ion, but also the adsorption-desorption circulation service life can be prolonged. In addition, with the method, iron powder can be recycled in the magnetic separation process for iron smelting.

The invention discloses a method for carrying out classification magnetic separation according to the particle sizes of quartz sand, and a magnetic separator thereof, and relates to the technical field of quartz sand treatment. The method is characterized by comprising the following steps: crushing quartz stone at first; then carrying out grading screening by virtue of sieve screens, wherein the size of the first-stage sieve screen is 50-70 meshes, and the size of the second-stage sieve screen is 170-190 meshes; and then inputting the quartz sand subjected to the grading screening into the magnetic separator separately and carrying out magnetic separation. The magnetic separator comprises a screening device and a magnetic separator body, wherein the screening device is arranged at the upper side of the magnetic separator; a charge port is formed in the upper part of the screening device; the screening device comprises the first-stage sieve screen and the second-stage sieve screen; the second-stage sieve screen is arranged at the lower side of the first-stage sieve screen; charge channels connected to the magnetic separator body are formed in the screening layers of the first-stage sieve screen and the second-stage sieve screen; and the magnetic separator body comprises a rack, a first magnetic drum, a second magnetic drum and a transmission motor. The iron removal efficiency of the magnetic separation method and the magnetic separator is greatly increased.

The invention discloses a system for removing iron in an iron-containing zinc sulfate solution. The system comprises a vertical reaction kettle and a horizontal reaction kettle, wherein the vertical reaction kettle comprises a vertical reaction kettle body, an iron-containing zinc sulfate solution feed port, a first steam inlet, a first oxygen inlet and a first iron-removed slurry outlet, and the horizontal reaction kettle comprises a horizontal reaction kettle body, a first iron-removed slurry feed port, a second steam inlet and a second oxygen inlet. According to the system for removing iron in the iron-containing zinc sulfate solution, due to the combination of the vertical reaction kettle and the horizontal reaction kettle, the problem of production halts caused by scaling in the kettle in deironing can be effectively solved, continuous and stable production can be guaranteed, so that the deironing efficiency and use ratio of the equipment are remarkably improved.

The invention discloses material breaking equipment for brick making. The material breaking equipment comprises an equipment shell. A feeding bin is arranged on the upper portion of the equipment shell, a crushing mechanism is arranged in the middle of the equipment shell, and an outlet in the lower portion of the equipment shell is of a toe-out structure. The outlet in the lower end of the equipment shell is provided with a stirring assembly which is composed of a motor, a stirring shaft and a stirring roll. A crushing roll nail is fixed into the equipment shell, and the crushing roll nail iscrossed with the stirring roll. The motor is arranged on a fixing plate which is connected with a vehicle frame, and the upper end of the fixing plate is connected with a mounting plate by arranginga vibration motor and a vibration elastic piece. The mounting plate and the equipment shell form discharging openings which are downwards oblique, and iron removing stock bins are arranged in the discharging direction of the discharging openings. Iron removing assemblies are arranged in the iron removing stock bins, and an air draft device is arranged on the vehicle frame. A branch pipe is arranged at the lower end of the air draft device. According to the material breaking equipment for brick making, the disadvantages that existing red brick materials are prone to causing blocking after beingcrushed, dust pollution occurs to a workshop, and the brick making quality is poor are overcome to improve the competitiveness of enterprises.

The invention relates to a method for separating zinc and iron in zinc hydrometallurgy leaching slag. Specifically, the leaching slag in zinc hydrometallurgy and preheated electrolysis waste liquor are added into a surge tank to be subjected to size mixing, sulfur disperser wood sodium sulfonate is added, and slurry is obtained; the above slurry is beaten into an autoclave through a booster pump, compressed air is led into the autoclave to conduct high-pressure leaching, the slurry obtained after the reaction is conveyed into a flash drum to be subjected to temperature and pressure reduction, and then the slurry obtained after temperature and pressure reduction is conveyed into a filter press to be subjected to pressing filtering, and filter liquor and filter residues are obtained; and the iron is deposited in the filter residues in the form of hematite, and after copper and indium are recycled from the filter liquor, neutral leaching is executed again. The above method for separating the zinc and the iron in the zinc hydrometallurgy leaching slag has the beneficial effects that the procedure is simple, fuel is saved, the investment cost is reduced, the iron removing efficiency is high, and valuable metal in the leaching slag can be recycled at the same time.

The invention discloses a flue gas pollutant cooperation removal technology based on electrolysis. The problems are solved that technologies are complex, the pollutant treatment efficiency is low, investment and operation cost are high in present flue gas treatment. The technology comprises steps: flue gas is pressurized and sent to a concentration tower, a reaction is carried out, the flue gas going out from the concentration tower is sent to an absorbing tower and contacts and reacts with a circulating absorption solution sprayed from a spray layer at the upper part of the tower in a reverse manner, and the flue gas after reaction is discharged from the top of the absorbing tower; part of the concentrate at the tower bottom of the concentration tower is subjected to iron removal, then is sent to a ammonium sulfate crystallization system, the flue gas goes into the absorbing tower from a flue gas inlet at the middle part of the absorbing tower, goes through at least one absorbing and electrochemical reaction layer arranged at the upper part of the tower firstly, then contacts and reacts with a circulating absorption solution in a reverse manner, then goes through a filler layer and a spraying layer, and is discharged from a flue gas outlet. The technology is simple, the reaction efficiency is high, the operation and investment cost are low, the system land occupation area is small, and the technology is especially suitable for cooperation treatment of multiple pollutants of sulfur dioxide, nitrogen oxides, fine particles, dioxin and the like.

The invention discloses a method for removing iron in a zinc sulphate solution. The method comprises the steps: adding an organic complexing agent to the zinc sulphate solution and carrying out iron removal, stirring and filtering to obtain an iron-free zinc sulphate solution and an organic complex precipitate; adding a back-extractant to the organic complex precipitate and back extracting the organic complex precipitate to separate the organic complexing agent from the iron; and recycling the back-extracted organic complexing agent for iron removal. The method disclosed by the invention has the advantages that the iron in the zinc sulfate solution can be effectively removed; the iron removing efficiency is high and the process is simple; the iron removing rate is up to 90%; and the iron removing cost is reduced.

The invention discloses a rapid efficient iron-removing whitening method for a low-grade raw material, comprising the following steps: pulverizing the low-grade raw material into mineral slurry, adding an organic acid, introducing a reducing gas, conducting a reaction at 25-95 DEG C, and after completion of the reaction, conducting solid-liquid separation, washing and drying to obtain a raw material having a reduced iron content. According to the invention, the reducing gas is directly introduced to perform iron removal and whitening when acid soaking is conducted, no new impurity is introduced, the operation is fast and efficient, and the introduced reducing gas can be recycled, so the method saves energy and is friendly to environment and low in processing cost. The raw material processed by the method is directly used for ceramic production, and the product whiteness and performance indicators fully meet the requirements of industry.

The invention discloses a preparation method of ceramic powder. The preparation method comprises the following steps: delivering raw materials to obtain pre-mixture; smashing and slurrying the pre-mixture to obtain slurry; carrying out sieving and deironing on the slurry; carrying out spray granulation on the slurry subjected to the sieving and deironing. The step of smashing and slurrying the pre-mixture to obtain slurry is characterized in that the pre-mixture is smashed by a ball mill, the percent contents of ballstones of different diameters in the ball mill are 30mm to 40mm to 50mm to 60mm=(5 to 20) to (25 to 35) to (30 to 50) to (5 to 20), the revolving speed of the ball mill is 10-15 rpm, and the ballstones used by ball milling are high-aluminum ballstones. The preparation method is characterized in that the ballstones of different diameters are mutually cooperated to smash the pre-mixture, meanwhile, the slurry is subjected to deironing by a deironing slot and an electromagnetic de-ironing separator, the preparation efficiency of the ceramic powder is improved, energy consumption is small, and efficiency is high.