517 results about "Iron sulfide" patented technology

Asymmetric supercapacitors comprise: a positive electrode comprising a current collector and a first active material selected from the group consisting of manganese dioxide, silver oxide, iron sulfide, lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, lithium iron phosphate, and a combination comprising at least one of the foregoing active materials; a negative electrode comprising a carbonaceous active material; an aqueous electrolyte solution selected from the group consisting of aqueous solutions of hydroxides of alkali metals, aqueous solutions of carbonates of alkali metals, aqueous solutions of chlorides of alkali metals, aqueous solutions of sulfates of alkali metals, aqueous solutions of nitrates of alkali metals, and a combination comprising at least one of the foregoing aqueous solutions; and a separator plate. Alternatively, the electrolyte can be a non-aqueous ionic conducting electrolyte or a solid electrolyte.

An asymmetric supercapacitor has a positive electrode having a current collector an active material selected from the group consisting of manganese dioxide, silver oxide, iron sulfide and mixtures thereof, a negative electrode having a carbonaceous active material carbon and optional current collector, an electrolyte, and a separator plate. In a preferred embodiment at least one of the electrodes has nanostructured/nanofibrous material and in a more preferred embodiment, both electrodes have nanostructured/nanfibrous material. The electrolyte can be liquid or solid although liquid electrolytes are preferred.

The asymmetric supercapacitor has improved energy density by electrically coupling an electrode of high faradaic capacity such as one having manganese oxide (MnO₂) with an electrode such as carbon that stores charge through charge separation at the electric double-layer. The asymmetric supercapacitor also improves power density by using high surface area nanostructured/nanofibrous electrode materials.

This invention provides a method of treating a dry or processed fluid pipe line susceptible to the build-up of iron sulfide deposits by complexing the iron sulfide in the pipe lines. The method of the present invention introduces the composition on a continuous or a batch basis to a gas pipe line. The composition is made of a solution of 1) water, 2) [tetrakis(hydroxymethyl)phosphonium]sulfate or chloride, and 3) a soluble ammonium salt, such as ammonium chloride or the like.

A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS₂), iron sulfide (FeS) and carbon particles. The electrolyte comprises a lithium salt dissolved in a solvent mixture. A cathode slurry is prepared comprising iron disulfide (FeS₂) powder, iron sulfide (FeS) powder, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.

The invention discloses a pressurizing and reductive leaching method of pyrolusite powder. The method comprises the following steps of: a) mixing pyrolusite powder and iron sulfide powder to obtain mixed powder; b) adding a sulphuric acid solution in the mixed powder to pulp and obtain mixed slurry; c) adding the mixed slurry in an autoclave; d) injecting a gas in the autoclave to ensure that the inner pressure of the autoclave reaches a preset pressure value continuously and perform acid leaching under a pressure, then discharging to obtain an acid leaching mixture; and e) performing solid-liquid separation to the acid leaching mixture to obtain a manganese sulfate solution, wherein the pyrolusite powder contains 13-35wt% of manganese. According to the pressurizing and reductive leaching method of pyrolusite powder in the embodiment of the invention, by adopting the pressurizing and leaching method, the manganese in low-grade pyrolusite powder can be leached fast and effectively.

The invention relates to a ceramic-fiber-paper-based friction plate and a production method thereof and aims to provide the friction plate which is high in friction coefficient and fine in wear resistance and the production method which is simple in procedure and easy and convenient for production. According to the technical scheme, the ceramic-fiber-paper-based friction plate comprises ceramic fiber, carbon fiber, aramid pulp fiber, long staple cotton paper, diatomite, cashew shell oil friction powder, calcium carbonate whisker, boron carbide, potassium feldspar powder, rubber granule, iron sulfide, mica, alum, magnesia, cashew shell oil modified phenolic resin, powdered fluorine rubber, butyronitrile rubber latex, boron-tung oil modified phenolic resin and moderate additives. The production method includes the steps of firstly, producing pretreatment material, mixing material and size and performing papermaking to produce raw paper of ceramic-fiber-paper-base friction material; and secondly, soaking the raw paper in adhesive, cutting into strips after hot-pressing solidification, and adhering to a friction plate core plate to obtain the ceramic-fiber-paper-based friction plate.

The invention relates to the field of production of ultrawhite rolled glass, in particular to a preparation method of solar ultrawhite ultrathin glass and a product thereof. The preparation method of the solar ultrawhite ultrathin glass comprises the following steps of: selecting and preparing raw materials; conveying the raw materials; melting; forming glass; annealing; detecting; and cutting and packaging. In the preparation method, iron content is controlled by taking different measures in the steps of selecting and conveying the raw materials, so that iron sulfide in the final solar glass is greatly reduced and the whiteness of the glass is improved; in the melting process, bubbles in the melted glass liquid is reduced by exhausting air and debubbling, controlling temperature and adding a glass clarifying agent, so that absorption rate is reduced and light transmittance is improved; and the annealing step of the glass finished product is a key link of the production process and plays an important role in the quality of the ultrathin glass product, so the defects that the ultrathin glass is easy to harden and easy to break during production and has high fragility are overcome by controlling rolling velocity, temperature and annealing rate in the process of glass forming and glass annealing.

The invention discloses a fiber-reinforced resin abrasive cutting wheel, and relates to the technical field of abrasive wheels. Raw materials comprise 20# white fused alumina, 24# brown fused alumina, 30# fused zirconia alumina, green silicon carbide, liquid resin, phenolic resin powder, calcium carbonate, cryolite, iron sulfide and carbon black, and material mixing, adhesive coating of meshes, superposition pressing forming and drying are carried out to obtain the finished products. The fiber-reinforced resin abrasive cutting wheel has the advantages of being rapid in cutting, grinding and heat dissipation, capable of keeping the end face to be sharp all the time in the process of cutting grinding, and low in cost.

The invention discloses an iron pyrite inhibitor for use under a low-alkalinity condition. The iron pyrite inhibitor consists of the following components in parts by weight: 40-50 parts of sodium thiosulfate, 40-50 parts of citric acid and 5-15 parts of polyacrylamide, wherein the polyacrylamide is hydroxyl-containing low molecular polyacrylamide of which the molecular content is 400-600. The inhibitor is prepared by using a method comprising the following steps of weighing sodium thiosulfate, citric acid and polyacrylamide; uniformly mixing to obtain 1-5 percent by weight of aqueous solution; and stirring. The iron pyrite inhibitor is used for selectively inhibiting iron sulfide minerals under a low-alkalinity condition, has good inhibition effects on minerals such as pyrite, magnetic pyrite and the like, has the advantages of stable performance, small using amount, low cost and environment friendliness, can be widely applied to sulfide ore dressing of copper, copper lead, copper zinc, lead zinc, copper lead zinc, gold and the like, and contributes to effectively increasing the scoring indexes of copper, lead, zinc, metal minerals and pyrite, effectively enhancing the flotation separation effect of multi-metal sulfide minerals and increasing the recovery rate of associated gold and silver.

The invention relates to a production process of steel, in particular to a smelting process of steel for a high-titanium alloy welding wire. The smelting process comprises the following steps of: in an electric furnace smelting step, adding molten iron and waste steel and tapping molten steel, wherein the molten iron accounts for 50-60% the total amount of the furnace charge, and the tapping temperature is not lower than 1630 DEG C; in a refining furnace refining step, adding silicon-aluminum-calcium deoxidant in a refining furnace for manufacturing white slag through diffusion deoxidization, and adding low-carbon ferromanganese and ferrosilicon according to steel grade component requirements and sampling component analysis to regulate components of the molten steel so as to reach temperature of 1630-1650 DEG C matching vacuum treatment; in a vacuum furnace degassing step, keeping the temperature for 10-15min under a low vacuum degree of 1 millibar, and carrying out secondary refining after vacuum breakage; and in a secondary refining step, adding low-aluminum ferrotitanium to regulate titanium content at the refining temperature of 1585-1600 DEG C, stirring for 1-2min, adding iron sulfide, stirring for 1-2min, taking a lollipop sample to analyze, continuously keeping static stirring, carrying out soft argon blowing for 15-40min after all components are qualified and carrying out continuous casting when the temperature is up to 1565-1585 DEG C. The smelting process disclosed by the invention can effectively control purification degree of the molten steel, ensures stability of titanium in the molten steel and improves the surface quality of a cast blank.

The invention discloses a thickened oil well polymer plugging remover. The plugging remover is prepared from the following materials in percentage by mass: 0.5 to 5.0 percent of gel breaker, 1.0 to 10.0 percent of cleaning agent, 0.1 to 5.0 percent of clay stabilizer, 0.1 to 5.0 percent of iron ion stabilizer, 0.1 to 5.0 percent of surfactant, 0.1 to 5.0 percent of corrosion inhibitor, 0.1 to 5.0 percent of bactericide and the balance of water, wherein the gel breaker is prepared from 30 to 70 percent of gel breaker I and 30 to 70 percent of gel breaker II, the gel breaker I is one or more of ammonium persulfate, sodium thiosulfate, potassium periodate and potassium monopersulfate, and the gel breaker II is one or more of calcium peroxide, potassium peroxodisulfate, sodium periodate and iron sulfide. The thickened oil well polymer plugging remover is suitable for solving the plugging problem caused by a thickened oil well polymer, has a better plugging removal effect than a conventional single oxidizer or single acid liquor, and has the advantages of good plugging removal effect, strong corrosion resistance, long period of validity, safety and the like.

The invention discloses a preparation method of a carbon-sulfur doped zero-valent iron composite material, which comprises the following the step: proportionally mixing and ball-milling a sulfur reagent, iron powder and carbon powder to obtain the carbon-sulfur doped zero-valent iron composite material; the sulfur reagent is elemental sulfur powder, iron sulfide powder or pyrite powder; the mass percentage ratio of the sulfur reagent to the iron powder to the carbon powder is (0.5-20): (70-99): (0.5-10). The sulfur reagent, the iron powder and the carbon powder are mixed and then subjected toball milling to obtain the carbon-sulfur doped zero-valent iron composite material, and the carbon-sulfur doped zero-valent iron composite material can be used for in-situ removal and degradation of heavy metal pollutants, pesticide pollutants, azo dye pollutants, halogenated organic matter pollutants and/or nitro organic matter pollutants in underground water and soil and has high removal and degradation efficiency.

The use of ozone during certain stages of metal separation by flotation degrades certain collectors that are absorbed on the particle surface, as well as the collectors and frothers in the liquid slurry. As a result, the mineral particle has a fresh surface and new chemical reagent(s) can be added in the subsequent flotation step(s). Also since ozone oxidizes the iron sulfide particles faster than the other mineral particles, depending upon the duration of treatment, the ozone concentration, and the kg O₃/ton consumed by the treated ore, the surface of the iron sulfide particles may be partially or even totally oxidized, thus allowing better separation. As a consequence, the iron content is decreased, and the grade of the mineral value such as zinc, copper, and nickel increases. Also, sulfide emissions during heat treatment or further processing of the minerals are decreased due to decrease iron sulfide content.

The invention discloses a preparing technology of high-energy Li-marcasite battery material, which comprises the following steps: covering conductivity and stable metal oxide on the surface of marcasite with composite conductive; setting the percentage of marcasite at 82-94 percent, conductive percentage at 4-10 percent and metal oxide percentage at 2-8 percent. The method reduces grain size of natural marcasite material through wetting ball grinding technology, which prepares the needed anode material.

The invention provides a sewage heavy metal ion adsorbent and a preparation method thereof. The sewage heavy metal ion adsorbent is prepared from the following raw materials in parts by weight: 200-300 parts of pine tree barks, 4-8 parts of zinc sulfide, 5-7 parts of iron sulfide, 10-20 parts of trimethoxysulfydrylallyl silane, 50-60 parts of diatomite, 5-10 parts of a graphene nano layer/MnO2 composition, 6-12 parts of a chitosan-graphene composite material, 20-40 parts of ethylene glycol, 10-20 parts of hydrochloric acid, 10-14 parts of cetyl trimethyl ammonium bromide and 400-500 parts of de-ionized water. The sewage heavy metal ion adsorbent provided by the invention has the advantages that the pine tree barks have a wide source and a relatively low cost; ion exchange is carried out by adopting a molecular sieve carrier so that secondary pollution is not caused; the graphene nano layer/MnO2 composition, the chitosan-graphene composite material, cross-linked rectorite and bentonite are added, so that the adsorption effect on heavy metal ions is improved; and the sewage heavy metal ion adsorbent has a good removing effect on liquid-phase heavy metals and the heavy metal ions.