380 results about "Brown iron oxide" patented technology

The invention relates to the technical field of metal material hot working, and discloses a hot-rolled coiled plate production process which comprises the following steps: preparing a reaction type protective agent, the high-temperature-resistant coating is prepared from the following raw materials in parts by weight: 20 to 40 parts of tetraethoxysilane, 5 to 15 parts of triethyl phosphate, 1 to 5 parts of triethyl borate, 0.5 to 2.0 parts of cerous nitrate (III) hexahydrate, 0.1 to 1.0 part of lithium acetate and 0.01 to 0.05 part of vanadyl acetylacetonate (IV). Coating the surface of a hot-rolled plate blank with the protective agent; the coated plate blank is heated in a heating furnace, so that the protective agent forms a molten-state protective layer in situ; carrying out hot rolling on the plate blank with the molten protective layer; and cooling and coiling the hot-rolled steel strip. In the whole heating and hot rolling process, the molten protective layer isolates the contact between the steel and the oxidizing atmosphere, so that the generation of oxide scales is fundamentally inhibited, the production process is simplified, and the metal yield is increased.

The present invention relates, in general terms, to a face mask. The present invention also relates, in general terms, to composite material, iron-iron oxide compositions and their methods of fabrication thereof. In particular, the iron-iron oxide composition comprises a cashew testa extract and iron particles and / or oxide core-shell particles. The iron-iron oxide composition can be used as an anti-microbial composition.

The invention relates to the technical field of blast furnace iron making, and particularly discloses a blast furnace composite stemming and a preparation method thereof.The blast furnace stemming is prepared from, by mass, aggregate including (43-X1-X2-X3)% of brown fused alumina, 13% of coke, (16-B)% of SiC, B% of clay, 4.5% of sericite, 7% of kyanite, 7.5% of silicon carbide iron, 4% of ball pitch, 5% of iron area waste mixture, 1% of iron oxide scale Fe3O4 X, 2% of cubic boron nitride c-BN X and 3% of graphene oxide GO X; comprising the following components in percentage by weight: 13-C% of tar, C% of asphalt and 2% of sodium pyrophosphate Na4P2O7; according to the method, stemming softening caused by excessive use of the oxide scale when the cold air pressure is low is prevented, the problems of incomplete internal structure and insufficient strength development of stemming caused by insufficient heat are avoided, excessive use of nanoscale materials is avoided, and the material cost is reduced.

The invention relates to an anti-collision automatic iron oxide powder blowing device. The device comprises an anti-collision device, a lining plate, a hoisting hole, a device fixing bolt, an air pipe fixing pipe clamp, an electric control valve, a bypass hand valve, a spraying beam pipeline, an air blowing nozzle, a photoelectric switch and the like. The anti-collision unit is a push-pull type pickling unit, has single uncoiling and single coiling, multiple steel grades, high strength, large thickness and poor head and tail plate shapes, and can cause damage to a spray beam nozzle, so that an anti-collision design needs to be added. Wherein the iron oxide powder is a hot-rolled pickled plate (coil) oxide scale which is not uniform, a large amount of crushed iron oxide powder falls off from the surface of the strip steel after the scale is broken by a crease-resistant roller, the iron oxide powder is adhered to the roller surface of a straightening machine to generate surface indentations when passing through the straightening machine, the surface quality defect of the strip steel is caused, the waste reduction of a unit is increased, and the production cost is reduced. Product quality is affected, and dissatisfaction of customers is caused. By designing the anti-collision automatic iron oxide powder purging device, strip steel threading is automatically started through signal purging of the photoelectric switch, broken iron oxide powder falls off from the surface of the strip steel in time, cleanliness of the roller surface of a straightening machine is guaranteed, the indentation defect generated due to the fact that the iron oxide powder adheres to the roller surface of the straightening machine is eliminated, the product quality is improved, and the production efficiency is improved. And the requirements of customers are met.

An iron oxide-ceria nanoparticle, an iron oxide-ceria nanostructure and an iron oxide-ceria nanocomposite are provided. The iron oxide-ceria nanoparticle comprises iron oxide and ceria. The iron oxide-ceria nanostructure comprises an inorganic support and a plurality of iron oxide-ceria nanoparticles dispersed in the inorganic support. The iron oxide-ceria nanocomposite comprises: an inorganic support; a plurality of iron oxide-ceria nanoparticles dispersed in the inorganic support; and a polymer layer that encompasses the inorganic support.

The utility model relates to the technical field of iron oxide pigments, in particular to iron oxide pigment production equipment capable of removing impurities, which comprises a workbench, an impurity removal box is arranged at the top of the workbench, an impurity removal frame is arranged in the impurity removal box, and two sides of the outer wall of the impurity removal frame are connected with two sides of the inner wall of the impurity removal box through two springs. A connecting plate is arranged on one side of the impurity removing frame, a semicircular groove is formed in the connecting plate, and a plurality of fixed arc-shaped blocks are arranged on the inner wall of the semicircular groove. According to the iron oxide pigment impurity removal device, the rotating shaft is driven by the motor to rotate, then the disc is driven to rotate in the semicircular groove, the fluctuation block impacts the fixed arc-shaped block, then the impurity removal frame is driven to vibrate, iron oxide pigment passes through the impurity removal holes, particle impurities are intercepted, and impurity removal treatment on the iron oxide pigment is facilitated.

The application discloses iron oxide coated silica core-shell nanoparticles and a preparation method and application thereof. The iron oxide coated silica core-shell nanoparticles comprise silica nanoparticles as an inner core and iron oxide nanoparticles as an outer shell coated on the inner core surface of the silica nanoparticles; the particle size is 22-112 nm; and the particle uniformity is 0.08-0.3. The preparation method of the iron coated silica nanoparticles provided by the application adopts the measure of adjusting the pH of slurry for multiple times, avoids the agglomeration of nanoparticles in a solution near the isoelectric point, and is thus favorable for finally obtaining core-shell nanoparticles with uniform monodispersity. No surfactant is used in the preparation process, and there is no complicated post-treatment process, thereby reducing the production cost. The uniformly monodispersed nanoparticles prepared by the method have great potential in the field of chemical mechanical polishing.

A method for making an iron-based oxide magnetic powder includes adding raw material solution containing trivalent iron ions, or trivalent iron ions and ions of a metal element that partially substitutes Fe sites, and an alkaline aqueous solution for neutralizing the raw material solution to a reaction system to adjust the pH of the reaction system to 1.0 or higher and 3.0 or lower. Hydroxycarboxylic acid is added to the obtained reaction solution and thereafter the pH of the reaction system is neutralized to 7.0 or higher and 10.0 or lower. The obtained precipitate of a substituent metal element-containing iron oxyhydroxide is coated with silicon oxide and then heated, whereby an iron-based oxide magnetic powder is obtained with a reduced content of fine and coarse particles, a particle shape close to a perfect sphere, and particles of ε-iron oxide in which Fe sites are partially substituted by other metal elements.

The invention belongs to the technical field of magnetic material preparation, and particularly relates to a production process of high-performance rare earth permanent magnetic ferrite magnetic powder. The process comprises the following steps: preparing iron oxide red and auxiliary materials, wherein the auxiliary materials comprise calcium carbonate, strontium carbonate, lanthanum oxide and cobalt oxide; mixing the raw materials in proportion, and then carrying out dry ball-milling densification to obtain a mixed material; the obtained mixture is subjected to steam treatment, the water content of the mixture reaches 2%-5%, then curing is conducted, the curing time is at least 30 min, and the curing process is completed in the auger transfer process; pelletizing is performed; pre-sintering is performed; and coarsely crushing and sieving the pre-sintered material to obtain the rare earth permanent magnetic ferrite magnetic powder. Through steam pretreatment and curing, the strength and thermal stability of the ball material are remarkably improved, the ball material is kept complete and good in fluidity in the kiln, and the consistency and the qualified rate of products are improved.

The invention provides a method and system for detecting the corrosion degree of a wire steel core of an overhead transmission line, and the method comprises the steps: carrying out the multi-angle X-ray transmission of a whole to-be-detected wire in an electrified state, and obtaining a projection sequence; inverting the projection sequence into a steel core three-dimensional density body, segmenting and identifying the steel core, the air and the corrosion area based on the steel core three-dimensional density body, and calculating the corrosion sectional area loss rate of the steel core; the chemical state of the Fe element is obtained in the corrosion area, satellite peaks of Fe-K alpha and iron oxide are collected respectively, and the concentration ratio of Fe < 0 > to Fe < 3 + > is calculated; according to the steel core corrosion sectional area loss rate and the concentration ratio of Fe < 0 > to Fe < 3 + >, the corresponding corrosion grade and residual strength of the wire to be detected are output, and the problems that in the prior art, the detection efficiency and reliability of the steel core corrosion degree of the wire of the overhead transmission line are not high are effectively solved. And the detection efficiency and reliability of the corrosion degree of the wire steel core of the overhead transmission line are effectively improved.

The utility model relates to the field of iron oxide pigment processing, and discloses an iron oxide pigment color mixing device which comprises a supporting frame, a mixing barrel is fixedly connected to the outer wall of the top end of the supporting frame, a support is fixedly connected to the top end of the outer wall of the mixing barrel, and a motor a is fixedly connected to the top end of the end, away from the mixing barrel, of the support. Quantitative mechanisms are arranged on the two sides of the mixing barrel, each quantitative mechanism comprises a quantitative barrel, the inner wall of the top end of each quantitative barrel penetrates through and is slidably connected with an L-shaped rod, the outer wall of the top end of each quantitative barrel is fixedly connected with a connecting block, and the inner wall of each connecting block is elastically connected with an inserting block through a limiting spring. According to the utility model, the motor b is used for driving the semicircular plate to rotate and the L-shaped rod is used for driving the inclined plate to move up and down, so that the volume of the cavity in the quantifying barrel is accurately adjusted, the accurate quantification of the pigment base stock is realized, the position after adjustment can be fixed through the insertion of the insertion block and the through hole in the L-shaped rod, and the quantifying stability and the color mixing accuracy are ensured.

This invention relates to the field of iron and steel metallurgy and proposes a method for controlling the corrosion-resistant iron oxide scale on the surface of hot-rolled steel plates. The method includes the following steps: First, molten steel is smelted and cast into steel billets; then, the steel billets are heated to 550-600℃ and held at an air-fuel ratio of 1.1-1.3 for 20-30 minutes; subsequently, the temperature is raised to 1100-1150℃ and held at an air-fuel ratio of 1.0-1.1 for 40-60 minutes; finally, the temperature is raised to 1180-1220℃ and held at an air-fuel ratio of 0.9-1.0 for 20-30 minutes to obtain the heated steel billet; the heated steel billet is then hot-rolled and cooled to obtain the steel plate. This technical solution solves the problems of uneven iron oxide scale growth and poor adhesion to the matrix in related technologies.

The application discloses a method for comprehensively recovering valuable metals in gold smelting slag, and belongs to the technical field of metallurgical solid waste resource utilization, and comprises the following steps: S1, ingredient mixing: uniformly mixing gold smelting slag, a chlorinating agent and a reducing agent according to a mass ratio, preparing into a pellet, and obtaining a mixture; S2, one-step chlorination and reduction roasting: after the mixture obtained in the step S1 is dried, the mixture is sent into a roasting furnace to be roasted, and chlorination volatilization of the valuable metals and reduction magnetization of iron oxides are simultaneously completed in the same roasting system; through accurate proportioning of the chlorinating agent and the reducing agent and synergistic regulation of the roasting temperature and the weak reducing atmosphere, the chlorination volatilization of gold, silver, copper, lead and zinc and the reduction magnetization of iron oxides are simultaneously completed in a single reactor and in the same roasting process, the problems of mutual contradiction between chlorination and reduction atmosphere and mutual restriction of recovery rates of two-step roasting processes are solved, the total roasting time is effectively shortened, and the comprehensive energy consumption is effectively reduced.

The present invention relates to a method for treating a fluid, comprising passing said fluid through an alkali-activated inorganic polymer material obtainable by a process of treating a slag comprising AI2O3, SiO2, and at least one iron oxide and / or iron oxy-hydroxide and / or iron hydroxide, for example red mud.

The utility model provides an iron removal oxidation device with a heat exchange function. The iron removal oxidation device comprises a tank body, a stirring device is arranged in the tank body, an aeration system is further arranged in the tank body, a cooling jacket is arranged on the outer side of the tank body, a sedimentation system is arranged at the bottom of the tank body, and a solution online Fe < 3 + > detector is connected to the side wall of the tank body. By means of the accurate stirring system and the cooling jacket, it is ensured that ore dissolving liquid makes full contact with oxidizing gas, the optimal reaction temperature is maintained, and therefore oxidation of Fe < + > is accelerated. The microporous aeration disc enhances the contact area between gas and the ore dissolving liquid, and improves the oxidation rate. Meanwhile, the sedimentation system effectively accelerates the separation of sediments and reduces the interference of impurities. And through Fe < + > concentration monitoring and backflow adjustment, accurate control over the ore dissolving liquid is achieved, and the quality of a final product is guaranteed.

The application discloses a high specific surface area desulfurizer hydrated iron oxide component and a preparation method thereof. First, an iron source ferrous salt and a precipitant are respectively dissolved completely by being heated to 40 DEG C, then the precipitant is put into the ferrous salt solution to carry out stirring and mixing reaction, pH is kept at 6.5-9.5, then small molecule organic alcohol, acid or amine substance is added, air is introduced to carry out oxidation reaction, finally, the material liquid is filtered, rinsed and dried, and the high specific surface area hydrated iron oxide desulfurizer active component is obtained. The preparation method of the high specific surface area hydrated iron oxide desulfurizer active component has the advantages of mild reaction condition, simple technological process, low production cost, non-toxic and non-pollution, and the specific surface area of the prepared hydrated iron oxide is greatly improved, the sulfur capacity is as high as 60.85%, and the method has good application prospect and potential practical value.

This invention discloses a black-based blue-spotted glaze with an earthworm-like pattern and its preparation method. The glaze consists of a body, a black base glaze, and a blue-spotted glaze from the inside out. The raw materials for the black base glaze are: feldspar, calcite, calcium borate, dolomite, talc, barium carbonate, quartz, bentonite, zirconium silicate, rutile, cobalt oxide, manganese oxide, and iron oxide. The raw materials for the blue-spotted glaze are: feldspar, limestone, alumina, talc, barium sulfate, Datong clay, zinc oxide, quartz, and titanium dioxide. The preparation method includes: 1. Wet ball milling the black base glaze raw materials to obtain a black base glaze slurry; 2. Wet ball milling the blue-spotted glaze raw materials to obtain a blue-spotted glaze slurry; 3. Bisque firing the body; 4. Applying the black base glaze slurry to the body and drying it; 5. Applying the blue-spotted glaze slurry to the body and drying it; 6. Oxidation firing and reduction firing of the body, followed by natural cooling to obtain the black-based blue-spotted glaze. The raw material formula of this invention is reasonable and environmentally friendly, which can improve the mechanical properties of the glaze; the preparation method is simple and the yield is high.

The application provides a preparation method of iron-carbon composite furnace charge and the iron-carbon composite furnace charge and belongs to the technical field of metallurgical processes. The iron-carbon composite furnace charge provided by the application comprises the following raw materials in parts by weight: non-coking coal powder 61-84 parts; iron oxide 10-30 parts; high-temperature accelerator 6-9 parts; hot water 8-12 parts; the preparation method comprises the following steps: after the raw materials are uniformly mixed, the mixed materials are pelletized to obtain pellet materials; the pellet materials are subjected to segmented carbonization at 650 DEG C-1050 DEG C; the pellet materials after carbonization are directly sprayed and cooled to obtain the iron-carbon composite furnace charge. The non-coking coal is not as good as the coking coal in terms of cohesiveness, and the high-temperature strength is low, so it is difficult to be applied in blast furnaces. In the application, the iron oxide is added in the non-coking coal, the particle size of the furnace charge is changed, and the carbonization treatment is carried out in a non-direct roasting furnace to form the iron-carbon composite furnace charge which can replace the coking coal. The application meets the national conditions that the non-coking coal reserves are rich in China, solves the technical problem of insufficient energy storage of the coking coal, reduces the cost, and the carbon emission reduction reaches more than 10%.

In various examples, the subject matter of this disclosure relates to a method and a system for reducing iron oxide to produce metallic iron. An example method includes: providing a fuel including at least one of bio-oil or fast pyrolysis biochar, feeding the fuel into a blast furnace containing iron oxide; gasifying the fuel to produce reducing gases; and reducing the iron oxide in the blast furnace using the reducing gases to produce metallic iron.

The present invention provides a powder that has high reaction efficiency and can maintain that reaction efficiency even after repeated oxidation-reduction reactions. The powder comprises iron oxide particles and oxide particles, wherein the oxide particles contain at least one of Cr and Si as an oxide, the average particle diameter of the oxide particles is 0.5 nm or more and 100 nm or less, the average value of the ratio Fmax / Fmin (the ratio of the maximum Ferret diameter Fmax to the minimum Ferret diameter Fmin) of the oxide particles is 2.0 or more, and the oxide particles are in contact with the iron oxide particles at an average contact rate of 20% or more and 80% or less.

The invention relates to the technical field of high-purity iron oxide powder processing, and discloses an ultrasonic dispersion treatment process for high-purity iron oxide powder processing, which comprises equipment installation and debugging, raw material preparation and ultrasonic dispersion. Through the arrangement of the motor, the motor can drive a first rotating shaft to rotate, the first rotating shaft can drive a first bevel gear to rotate, the first bevel gear can drive a second bevel gear meshed with the first bevel gear to rotate, the second bevel gear can drive a second rotating shaft and a rotating rod to rotate, and the rotating rod can rotate under the action of a first connecting rod; according to the ultrasonic dispersion device, the first sliding block can repeatedly slide in the first sliding groove, the vibration rod can transversely and repeatedly move and adjust, the vibration rod can move to different positions to conduct ultrasonic dispersion on materials, and ultrasonic dispersion of the materials at the different positions is simpler and more convenient.

The invention belongs to the technical field of coatings, and particularly relates to quick-drying micaceous iron epoxy ester antirust paint and a preparation method thereof. The quick-drying micaceous iron epoxy ester antirust paint is prepared from the following raw materials in parts by weight: 30 to 40 parts of modified epoxy ester resin, 40 to 50 parts of filler, 0.5 to 1 part of flatting agent, 1 to 5 parts of pigment and 20 to 25 parts of mixed solvent. The quick-drying micaceous iron epoxy ester anti-rust paint can effectively shorten the drying and hardening time of the micaceous iron epoxy ester anti-rust paint, meanwhile, the filler and the epoxy ester resin matrix are good in compatibility, strong in interface bonding and good in adhesive force, permeation of corrosive media can be effectively reduced, permeation of water and oxygen can be blocked, and the anti-rust effect is improved.

The utility model discloses a zinc ingot production steam condensate water cooling recovery circulating system which comprises a reaction device and a separation device, and the reaction device is arranged on the left side of the separation device. The reaction device further comprises a dosing and mixing device, a catalytic reaction device and a communicating pipeline; the separation device further comprises a water pump, a swirler and a sewage discharge water tank. The filtering structure has the function of filtering insoluble impurities in condensed water before the condensed water enters the device, so that the service life of the filtering structure is prolonged; the mixing efficiency is improved, and the generation rate of ferric oxide in the subsequent treatment process is increased; iron oxide is prevented from adhering to the surface of the manganese dioxide catalyst and the separation effect of the device is ensured.

The invention discloses a method for stabilizing treatment of chromium-containing sludge and recovery of magnetic ferrochrome oxide, which adopts a simple solvothermal process, uses ethylene glycol as a reducing solvent, prevents Cr (III) from being oxidized into Cr (VI) in the solvothermal process, and converts iron-chromium hydroxide in the treated chromium-containing sludge into magnetic iron-chromium oxide, so that the magnetic ferrochrome oxide is recovered. The residual calcium-containing phase in the original chromium-containing sludge can be removed through an acid dissolution method, and finally the magnetic iron-chromium oxide with the calcium content lower than 2% is obtained. After treatment, the chromium content in the ethylene glycol solvent is lower than 0.2 mg / L, the next batch of sludge treatment can be carried out, and meanwhile, the chromium content in the acidic calcium ion leachate is lower than 0.9 mg / L. The method is simple in process, low in requirement on industrial equipment and low in required energy consumption, and meanwhile, the product obtained through treatment can show certain application potential in the fields of environmental protection, high-end manufacturing and the like.

The present invention developed a composite having a novel structure containing, in a high content, a powder having a radiation-shielding function.　Provided is a composite having a radiation-shielding function and a method for producing the same. The composite comprises a preform made from a mixture containing a liquid silica-based binder and one or more radiation-shielding powders selected from gadolinium oxide, boron carbide, boron oxide, boron, barium sulfate, strontium oxide, tungsten, tungsten oxide, tungsten carbide, molybdenum, molybdenum oxide, iron powder, iron oxide powder, and ferrite powder, the radiation-shielding powder(s) being contained in the range from 3% to 85% in total. All of the voids in the preform are impregnated and filled with molten aluminum and solidification is allowed to occur to form a composite, or 25% or more of the voids in the preform are impregnated with a liquid organic / inorganic sealing agent and solidification is allowed to occur to form a composite. The liquid silica-based binder has properties that allow the preform to be formed at a temperature at which the radiation-shielding powder(s) does not decompose.

This application provides an iron-based thin-film probe, an in-situ analysis method for soil micro-interface pollutants, a screening method for iron-based materials for soil remediation, and a soil remediation method, belonging to the field of environmental analysis and testing technology. The iron-based thin-film probe, used to study the role of iron-containing mineral micro-interface pollutants in soil, is prepared from an iron sheet through in-situ surface modification; wherein the modified surface formed by the in-situ surface modification is selected from any one of nano-zero-valent iron, iron oxide, and iron sulfide; the iron-based thin-film probe is used to simulate the adsorption, distribution, and redox reactions of iron-containing mineral micro-interface pollutants in soil.

A low heat, electrochemical cascade process generates iron metal (Fe2) from iron ore and a sequence of alkaline electrolytic solutions. An intermediate phase favors iron oxide in a layered double hydroxide (LDH) form resulting from conditioning silicates in the alkaline solution over chemically inert Fe3O4 formation. The alkaline electrolytic solution mitigates production of hydrogen gas over acidic approaches by inhibiting a hydrogen evolution reaction (HER) that forms parasitic hydrogen gas. An electrolyte containment generates an electrolyte flow for the cascading electrochemical reaction as the raw iron oxide transforms to iron metal while avoiding conventional shortcomings of low value products of Fe3O4 (magnetite) and hydrogen gas, and instead favors generation of iron metal. Additional electrolyte salts can further form iron alloys.

A toner comprising a toner particle comprising a binder resin, a nonmagnetic inorganic oxide particle A, and a magnetic iron oxide particle B, wherein a softening point of a chloroform-soluble component of the toner particle is not greater than 90° C.; the nonmagnetic inorganic oxide particle A and the magnetic iron oxide particle B are internally added to the toner particle; the nonmagnetic inorganic oxide particle A comprises as its main component at least one element selected from the group consisting of Si, Mg, Al, Ti, and Sr; a proportion of the inorganic oxide particles having a long diameter of specific length is in specific range; and a value of a ratio of a number-average particle diameter of the long diameter for the nonmagnetic inorganic oxide particle A, to a number-average particle diameter of the long diameter for the magnetic iron oxide particle B, is 5 to 30.

In the present invention, a reducing agent and a slag-forming agent containing CaO and SiO2 are added to an oxide containing manganese (Mn) and at least one element selected from the group consisting of nickel (Ni) and cobalt (Co), and the resultant mixture is heated to reduce the oxide. The reducing agent contains an aluminum-containing material and an iron-containing material. The iron-containing material is at least one selected from the group consisting of metallic iron and iron oxide. The total added amount of the aluminum-containing material and the iron-containing material is 0.8 to 1.5 equivalents inclusive. As a result, Ni and Co can be recovered in large amounts and preferentially over Mn.