27 results about "Elemental iron" patented technology

This invention relates to the field of comprehensive utilization of solid waste, specifically providing a process for treating ilmenite ore using solid waste pyrolysis products. The process involves preheating the ilmenite ore to above 1000°C with low-oxygen flue gas, then feeding it along with waste plastics, waste coke, and other raw materials into a pyrolysis reduction reactor for pyrolysis reduction. The pyrolysis of waste plastics and waste coke generates reducing gases, ensuring the device is completely in a reducing gas atmosphere. These gases react with the ilmenite ore at high temperatures to generate magnetically separable elemental iron and Fe3O4, thereby increasing the actual FeTiO3 content. Compared to existing ilmenite ore processing technologies, this method significantly increases the processing temperature, improves processing efficiency, and achieves comprehensive energy utilization.

In an iron (II) citrate monohydrate, identified by the formula FeC6H6O7-H2O ( Ferrous citrate monohydrate or iron citrate (II) monohydrate), obtained according to a particular production method, citric acid and elemental iron are bound in a molecular complex where the iron is agglomerated in the citrate which moves to a cyclic form and the iron is bound to the O groups of the carboxylic groups 1 and 3 through ionic bonds, forming two enantiomers, D and L (R and S), both perfectly water-soluble and highly assimilable by the human body. Formula (L) & Formula (D). With a different absorption mechanism from traditional iron molecules, said iron citrate monohydrate is usable in pharmaceutical and / or nutraceutical and / or food compositions, in particular in the treatment and prevention of iron deficiency anemias and in general of all diseases and disorders associated with iron deficiency. The effectiveness is proven by several examples.

The invention relates to a magnetic material comprising at least iron, in metallic form and / or in oxide form, and at least an alumina oxide matrix, the iron content being between 15% and 70% by weight as element iron relative to the total weight of said material, characterized in that said material has a specific surface area greater than 50 m² / g and less than 300 m² / g, said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

The present invention relates to an anode active material comprising: natural graphite particles; and elemental iron, elemental silicon, and elemental sulfur present on the surface, inside, or both on the surface and inside the natural graphite particles, wherein the total content of the elemental iron, the elemental silicon, and the elemental sulfur is more than 5 ppm and 100 ppm or less on the basis of the total weight of the natural graphite particles, and the content of the elemental iron is 5-50 ppm on the basis of the total weight of the natural graphite particles.

This invention belongs to the field of flow battery energy storage technology, and relates to a negative electrode electrolyte for alkaline all-iron flow batteries and its preparation method. The negative electrode electrolyte is prepared from iron salts, a complexing agent, a promoting component, an alkaline component, an auxiliary electrolyte, and water. The total iron concentration is 0.1–2.0 mol / L, the molar ratio of the complexing agent to the iron salt is 1.5–4, the molar ratio of the promoting component to Fe is 0.05–1.0, the alkaline component concentration is 2.0–6.0 mol / L, and the auxiliary electrolyte concentration is 0–2.0 mol / L. The negative electrode electrolyte of this invention for alkaline all-iron flow batteries has a high total iron concentration, which not only avoids the precipitation of elemental iron during charging and discharging, but also effectively prevents the formation of ferric hydroxide precipitate, improves the stability of iron ions, and greatly extends the cycle life of the negative electrode electrolyte. It can be widely used in aqueous alkaline all-iron flow batteries.

The present invention relates to a water dispersible granular composition comprising a homogeneous mixture of one or more of water insoluble Magnesium salt, complex or derivatives thereof in the range of 5%-80% w / w of the total composition and one or more of water insoluble Iron salt, complex or derivatives thereof in the range of 1%-50% w / w of the total composition; with at least one agrochemically acceptable excipient; wherein the elemental Iron is present in the range of 0.01% to 50% by weight of the total composition and wherein the elemental Magnesium is present in the range of 0.1% to 50% by weight of the total composition and wherein the composition comprises particles in size range of 0.1micron-30 microns. The present invention relates to a process of preparing the crop nutrition composition and method of treating plants, seeds, crops, plant propagation material, locus, plant parts thereof or soil with the crop nutrition composition.

This disclosure provides at least one embodiment of a method for preparing sponge titanium, comprising: pretreating bauxite tailings to obtain a first mixture; acid-treating the first mixture and filtering it to obtain a second mixture; placing the second mixture in a reaction vessel containing an alkaline substance to react, thereby converting ferrous titanate into titanate and ferric oxide or ferrous hydroxide to obtain a third mixture; filtration of the third mixture to obtain a first solid phase and a first liquid phase, and drying and grinding the first solid phase; calcining the dried and ground first solid phase to form elemental iron, and performing magnetic separation to remove the elemental iron; adding an acidic substance to the first liquid phase to react and obtain metatitanic acid colloid, and washing the metatitanic acid colloid; and sequentially subjecting the metatitanic acid colloid to calcination, chlorination, and displacement reactions to obtain sponge titanium. The sponge titanium obtained by this preparation method has high purity.

This invention discloses a method and system for online reconstruction of mineral phases in high-temperature steel slag, belonging to the field of steel slag resource utilization technology. The method involves crushing coal gangue and room-temperature steel slag to a particle size of 0.5 to 3 mm, mixing them at a mass ratio of 1:0.5 to 1.5 to prepare a reconstruction adjuster, and then adding the reconstruction adjuster and high-temperature liquid steel slag (temperature above 1350℃) to a mixing furnace at a mass ratio of 0.1 to 0.5:1. After settling, the mineral phase reconstruction is completed, converting free calcium oxide into dicalcium silicate and tricalcium silicate, magnesium oxide, ferrous oxide, and manganese oxide into the RO phase, and ferric oxide into ferrous oxide and elemental iron. The mixture after the reaction is cooled to below 500℃, then crushed, magnetically separated, and ground to a specific surface area of ​​400 square meters per kilogram to obtain a cementitious material. This invention utilizes the sensible heat of the high-temperature steel slag itself, eliminating the need for additional heating, achieving high-value utilization of solid waste. The prepared cementitious material exhibits high hydration activity and good volume stability. The process is simple and easy to implement, contributing to the metallurgical industry's achievement of dual-carbon goals.

The present invention relates to a crop nutrition composition in the form of liquid suspension comprising a homogeneous mixture of one or more of water insoluble Magnesium salt, complex or derivative thereof in the range of 1-70% w / w of the total composition and one or more of water insoluble Zinc salt, complex or derivative thereof in the range of 1-50% w / w of the total composition and one or more of water insoluble Iron salt, complex or derivative thereof in the range of 1-50% w / w of the total composition with at least one agrochemically acceptable excipient; wherein elemental Iron is present in the range of 0.01% to 40% w / w of the total composition and wherein elemental Zinc is present in the range of 0.01% to 40% w / w of the total composition and wherein elemental Magnesium is present in the range of 0.01% to 50% w / w of the total composition and wherein the composition comprises of particles in the size range of 0.1 micron-20 microns. The liquid suspension composition is in the form of a suspension concentrate, oil dispersion or a suspo-emulsion. The present invention further relates to a method of treating plants and meeting their nutritional requirement by making essential nutrients like Magnesium, Zinc and Iron available to them and also unlocking other micronutrients and trace elements present in the soil which hitherto were not available because of various factors primarily being soil degradation on account of excessive use of synthetic fertilizers. The present invention also relates to strengthening the plants so as to withstand pest infestation. The present invention also relates to a method of biofortification of plant with essential micronutrients.

This application relates to the field of diamond tool manufacturing technology, and discloses a heat-fatigue-resistant ceramic tile diamond saw blade and its preparation process. The heat-fatigue-resistant ceramic tile diamond saw blade includes a base steel disc and a diamond cutting head welded to its outer edge. The cutting head is made of a mixture comprising: a base matrix powder consisting of 40-50 parts of pre-alloyed copper-nickel alloy powder, 25-35 parts of elemental iron powder, 8-12 parts of elemental cobalt powder, and 13-17 parts of elemental tin powder; 5-10% Invar alloy powder, 1-3% elemental molybdenum powder, and 0.5-1.0% titanium hydride powder added according to the total weight of the base powder; and uncoated single-crystal diamond particles accounting for 15-25% of the total volume of the sintered cutting head. This invention uses a technical solution of pre-alloyed copper-nickel alloy powder combined with Invar alloy powder to adjust the matrix expansion rate, achieving the technical effect of reducing the alternating stress at the interface between diamond and metal binder.

Provided are concrete wastewater treatment device and system, pertaining to the field of concrete wastewater treatment. The concrete wastewater treatment device includes a first wall and a CO2 input pipe. The first wall encloses a first chamber, with the first wall being provided with a first liquid inlet and a first liquid outlet. The first liquid outlet is positioned higher than the first liquid inlet. The first chamber is equipped with a groove for accommodating reducing agent powder, which includes at least one of elemental iron, divalent iron compounds, and elemental aluminum. The CO2 input pipe is used to deliver CO2 into the first chamber, with the gas outlet end of the CO2 input pipe being close to or located within the groove. The gas outlet direction of the CO2 input pipe is configured such that the conveyed CO2 can induce turbulence and agitation in the reducing agent powder.

This invention relates to a crop nutrition and fortification composition comprising: elemental sulfur, ranging from 1 wt% to 90 wt%; one or more water-insoluble or water-soluble iron salts or derivatives or mixtures thereof, wherein the elemental iron content ranges from 0.1 wt% to 50 wt%; one or more water-insoluble or water-soluble zinc salts or derivatives or mixtures thereof, wherein the elemental zinc content ranges from 0.1 wt% to 55 wt%; one or more water-insoluble or water-soluble magnesium salts or derivatives or mixtures thereof, wherein the elemental magnesium content ranges from 0.5 wt% to 50 wt%; one or more water-insoluble or water-soluble boron salts or derivatives or mixtures thereof, wherein the elemental boron content ranges from 0.01 wt% to 25 wt%; one or more water-insoluble or water-soluble manganese salts or derivatives or mixtures thereof, wherein the elemental manganese content ranges from 0.1 wt% to 40 wt%; one or more water-insoluble or water-soluble copper salts or derivatives or mixtures thereof, wherein the elemental copper content ranges from 0.1 wt% to 40 wt%; and one or more surfactants, ranging from 0.1 wt% to 40 wt%. The composition is in the form of water-dispersible granules and liquid suspensions, wherein the particle size range of the composition is 100 nanometers to 5 micrometers and the average particle size distribution is less than 1000 nanometers, and wherein the total content of the water-soluble salts, derivatives, or mixtures in the composition does not exceed 80% of the total weight of the composition. The invention also relates to methods for preparing the crop nutrient and fortification compositions, and methods for treating plants, seeds, crops, plant propagation materials, their sites or parts, or soil with the crop nutrient and fortification compositions.

This invention relates to a method for extracting iron from red mud using microwave biomass reduction-sulfuric acid leaching-electrolytic deposition, belonging to the field of resource comprehensive utilization and hydrometallurgical technology. The method first involves uniformly mixing red mud with a biomass reducing agent, then using a microwave field for rapid and efficient reduction, converting the sparingly soluble iron oxides in the red mud into readily soluble elemental iron or low-valence iron oxides. The reduction product is then leached with sulfuric acid, allowing the iron to enter the solution and separate from most impurities. Finally, the iron-rich leachate is electrolytically deposited to directly obtain high-purity electrolytic iron. This invention utilizes the selectivity and holistic nature of microwave heating, coupled with the green and renewable characteristics of the biomass reducing agent, to achieve efficient, energy-saving, and environmentally friendly recovery of iron from red mud. The process is short, energy-efficient, and has significant industrial application prospects.

The invention relates to a magnetic material comprising at least iron, in metallic form and / or in oxide form, and at least a clay matrix, the iron content being between 15% and 70% by weight as element iron relative to the total weight of said material, characterized in that said material has a specific surface area greater than 1 m² / g and less than 50 m² / g, said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

The application discloses a low-carbon emission steel-cement co-production method by using methane pyrolysis and dry reforming of methane. The method comprises the following steps: (1) mixing cement raw materials with solid waste in a reactor under a methane atmosphere, and calcining to obtain calcined cement raw materials; and (2) mixing the calcined cement raw materials with iron oxide to obtain cement clinker, elemental iron and synthesis gas. In view of the high carbon emission of the steel and cement industries, the coupling of iron oxide reduction and methane pyrolysis and the coupling of calcium carbonate decomposition and dry reforming of methane are realized by introducing methane into the process of iron oxide reduction and calcium carbonate decomposition, process carbon emission generated in the production of steel and cement can be reduced while obtaining elemental iron and cement clinker, and carbon material, hydrogen and carbon monoxide composition synthesis gas are obtained, further realizing the co-production of steel, cement, chemicals and carbon material, and ensuring the low carbonization and economy of the whole production process.

This invention discloses a method for detecting the structure of iron powder combustion products, belonging to the field of detection methods. This method measures elemental iron (Fe). 0 The content of ferrous iron (Fe) was determined. 2+ The content of ferric iron (TFe) was determined; the content of total iron (TFe) was calculated; and the content of ferric iron (Fe) was calculated. 3+ The content of oxide components was calculated, including ferrous oxide, ferric oxide, and magnetite. The radii of elemental iron, ferrous oxide, ferric oxide, and magnetite were also calculated. Reliable physical and chemical analysis units were used to obtain measurement data, and then mathematical calculations were performed to obtain accurate and reliable information on the composition and structure of iron powder oxidation products, providing a solid theoretical basis for the application of iron powder as a metal particle fuel.

This invention discloses a method and system for depleting antimony blast furnace slag, belonging to the field of non-ferrous metallurgical technology. The method for depleting antimony blast furnace slag includes the following steps: S1, primary sedimentation separation: High-temperature molten slag from the antimony blast furnace at 1200-1250℃ undergoes preliminary sedimentation separation to separate a portion of crude antimony or antimony matte, obtaining primary treated slag; S2, secondary deep depletion: The primary treated slag undergoes deep depletion treatment; the deep depletion treatment includes: adding a reducing agent to the primary treated slag at 1200-1250℃ and stirring, reducing ferrous oxide in the molten slag to elemental iron, which then forms a high-density iron-antimony alloy with metallic antimony in the molten slag, resulting in a low antimony content in the final treated slag.

The present invention provides a method and apparatus for producing iron from an iron ore, together with an option for the onward conversion of that iron into steel. The iron may come from an iron ore in which the iron is present as at least one of the mineral and mineraloid forms of iron oxide and iron oxyhydroxide, such as hematite and limonite, as well as from red bauxite. The invention may also be used to produce elemental iron from other sources of iron oxide, such as from mill scale, whereby sources of waste iron oxide may be recycled. The method comprises comminuting the iron ore into fines, dehydrating the iron ore and dehydroxylating hydroxylated compounds in the ore. The ore thus treated is then reacted with an amount of liquid sodium in excess of the stoichiometric amount thereof required for a redox reaction between the liquid sodium and iron oxide(s) from the ore. This precipitates out from the liquid sodium both elemental iron and other insoluble products at least comprising sodium oxide. The redox reaction is conducted in an inert atmosphere and its temperature is controlled to remain below about 450 °Celsius to inhibit the production of ternary oxides like Na4FeO3. The method then comprises separating the iron from the other insoluble products, for example using magnetic and / or density-based separation, and separating the iron and the other insoluble products as a solid phase from the liquid sodium, in any order. Thus iron can be extracted from iron ore without producing any greenhouse gas emissions, and sodium oxide, which has a high affinity for carbon dioxide, is produced as a co-product. Since the iron is produced as a finely divided particulate, it may subsequently be converted into steel using a powder metallurgical technique with a considerable energy saving over prior art steelmaking techniques. If the sodium oxide is used to mineralize captured carbon dioxide, the invention can have a negative carbon footprint overall. If the iron ore comprises red bauxite, the other insoluble products may also be processed to extract alumina from them without creating environmentally hazardous red mud. In some embodiments, the other insoluble products may be used to produce an alkaline activator for an alkaline activated or geopolymer cement. The corresponding apparatus (3a) comprises a comminution device (2) (such as a rock crusher or grinder), a dryer (4) for dehydrating and dehydroxylating the iron ore, a gas-tight reaction vessel (130) for reacting the treated ore with the liquid sodium, a solid-species separator (180a) for separating the iron from the other insoluble products and a solid-liquid sodium phase separator (190a, 190b).

The present application relates to the technical field of electroplating, in particular to a cyanide-free zinc deposition agent, a preparation method thereof and a zinc deposition method. The cyanide-free zinc deposition agent comprises the following components in terms of mass concentration: sodium hydroxide 70-130 g / L, zinc element 3-9 g / L, iron element 0.5-3 g / L, manganese element 1-7 g / L, molybdenum element 0.1-1 g / L, disodium ethylenediaminetetraacetate 50-90 g / L and triethanolamine 10-40 g / L. The cyanide-free zinc deposition agent can improve the adhesion of the zinc immersion layer, reduce the contact resistance of the zinc immersion layer, and is green and environmentally friendly.

The application discloses a method for preparing battery-grade ferrous phosphate solution and recovering copper and graphite by co-leaching of phosphorus iron slag and siderite. The method comprises the following steps: reducing leaching of raw materials including phosphorus iron slag, siderite and elemental iron by using phosphoric acid as a leaching agent, and solid-liquid separation to obtain battery-grade ferrous phosphate solution and leaching residue; and graphite flotation separation of the leaching residue after slurry adjustment to obtain copper-rich tailings and graphite concentrate. The method can selectively recover valuable components in the phosphorus iron slag and the siderite, obtain battery-grade ferrous phosphate solution, and efficiently recover graphite and copper components by the synergistic effect of the phosphorus iron slag and the siderite and by using weakly acidic phosphoric acid as a leaching agent, and the method is simple in process, low in cost and suitable for industrial production.

The application provides a method for recovering lithium, iron and phosphorus from phosphorus-iron-lithium slag, which comprises the following steps: performing electrolytic reduction treatment on a phosphorus-iron-lithium slag system to obtain a reduction system; and performing impurity removal treatment on the reduction system to obtain a divalent iron system. The method provided by the application can recover lithium, iron and phosphorus in the phosphorus-iron-lithium slag at the same time, reduce the content of impurity metal elements, and reduce the loss of phosphorus, iron and lithium.

This invention belongs to the field of solid waste treatment, specifically relating to a method for the selective separation of Fe, M, and N from iron and steel metallurgical dust containing alkali metal M and volatile heavy metal N. The method involves mixing the iron and steel metallurgical dust with carbonaceous materials and pressing them into blocks. The blocks are then heated to temperature T1 using microwaves in a protective atmosphere, followed by a reduction treatment in a reducing atmosphere to obtain a tail gas enriched with volatile heavy metal N and a reduction slag enriched with elemental iron and alkali metal M. The reduction slag is then subjected to wet grinding and leaching to separate elemental iron and a solution enriched with alkali metal M. The alkali metal M includes at least one element selected from sodium and potassium; the volatile heavy metal N includes at least one element selected from lead and zinc. The temperature T1 is 800-900℃. The method provided by this invention can effectively suppress the accompanying volatilization of alkali metal M, preventing severe corrosion of the reaction equipment.

The application provides a method for recovering lithium, iron and phosphorus from phosphorus-iron-lithium slag, which comprises the following steps: (1) performing electrolytic reduction treatment on the phosphorus-iron-lithium slag system to obtain a reduction system; (2) performing impurity removal treatment on the reduction system to obtain a divalent iron system; and (3) performing electrolytic oxidation treatment on the divalent iron system to obtain a trivalent iron system. The method can recover lithium, iron and phosphorus in the phosphorus-iron-lithium slag, reduce the content of impurity metal elements, and has high recovery rate and low production cost.

This invention belongs to the field of metallurgical engineering and solid waste resource utilization technology, specifically relating to a method for separating and recovering iron from iron-rich smelting slag using waste graphite reduction roasting. The method includes the following steps: (1) drying and crushing the iron-containing slag, then adding waste graphite as a reducing agent and mixing evenly to obtain a mixture; (2) roasting the mixture from step (1) at 900~1100℃ under an inert atmosphere to obtain a roasting product; (3) ball milling the roasting product, followed by magnetic separation to obtain a magnetic concentrate enriched with elemental iron. This invention uses waste graphite as a reducing agent and achieves efficient recovery of iron resources from amorphous iron-containing slag through a direct reduction roasting-mechanical ball milling-magnetic separation coupling process. It realizes the synergistic resource utilization of amorphous iron-containing slag and waste graphite.