17 results about "Brucite" patented technology

The invention relates to the technical field of building materials, in particular to a cementing material for a fabricated wall prepared from multi-element solid waste and a preparation method of the cementing material. The preparation method comprises the following steps: 25-55 parts of fly ash, 25-65 parts of blast furnace slag, 8-10 parts of lime, 1-5 parts of desulfurized gypsum, 3-6 parts of a first mixture, 2-5 parts of a second mixture and 5-8 parts of an alkali activator; the mass ratio of the metakaolin to the bentonite to the superfine calcium carbonate in the first mixture is 3: 2: 1; the mass ratio of the vermiculite to the expanded perlite to the glass beads in the second mixture is 2: 2: 1. Through the synergistic excitation effect of Ca < 2 + > and Na < + > and the addition of the first mixture and the second mixture, the cementing material forms a more stable microstructure. A hydration product SEM figure shows that C-S-H and C (N)-A-S-H gel are symbiotic to form a three-dimensional network, pores are filled with needle-like ettringite crystals, and in combination with the brucite phase anchoring effect, the mechanical properties, such as strength and durability, of the material are remarkably improved.

A method of carbon mineralization includes exposing a solution including a plurality of metal salts and a surfactant to carbon dioxide at a pressure in a range from 300 to 700 pounds per square inch (PSI) to form a carbonated solution. The method further includes adding a base to the carbonated solution until the pH is above 10 to form a reaction mixture and reacting the reaction mixture to form mineral precipitates. The carbon dioxide reacts with the metal salts to form the mineral precipitates. The surfactant includes a tertiary amine including one alkyl group and two ethoxylate groups including two or more ethoxy units. The mineral precipitates include calcite, portlandite, brucite and halite. The mineral precipitates are in the form of particles having an average size in a range from 1 to 75 μm.

The application relates to the technical field of building materials, in particular to a cementing material for preparing an assembled wall body from multiple solid wastes and a preparation method; the cementing material is prepared from 25-55 parts of fly ash, 25-65 parts of blast furnace slag, 8-10 parts of lime, 1-5 parts of desulfurization gypsum, 3-6 parts of a first mixture, 2-5 parts of a second mixture and 5-8 parts of an alkali activator; the mass ratio of metakaolin, bentonite and superfine calcium carbonate in the first mixture is 3:2:1; the mass ratio of vermiculite, expanded perlite and glass beads in the second mixture is 2:2:1. The cementing material has a more stable microstructure through the synergistic activation of Ca and Na, and the addition of the first mixture and the second mixture. 2+ and Na + The C-S-H and C(N)-A-S-H gels form a three-dimensional network, needle-shaped ettringite crystals fill pores, and the anchoring effect of brucite phase is combined, so that the mechanical properties, such as strength and durability, of the material are significantly improved.

Water shut-off materials may comprise: a polyacrylamide; a crosslinker; an aqueous base fluid; and a plurality of magnesium oxide particles. Methods for using water shut-off materials may comprise: pumping a water shut-off material into a wellbore and to a target zone in a subterranean formation; wherein the water shut-off material comprises: a polyacrylamide; a crosslinker; an aqueous base fluid; and a plurality of magnesium oxide particles; allowing at least a portion of the plurality of magnesium oxide particles to react with the aqueous base fluid to form brucite within the target zone; allowing at least a portion of the polyacrylamide to crosslink within the target zone; and forming a seal in the target zone with the brucite and crosslinked polyacrylamide.

The present disclosure relates to the field of tail gas treatment, and provides a kiln tail gas treatment equipment and a kiln tail gas treatment method, wherein the kiln tail gas treatment equipment comprises a gas inlet structure (30), a first treatment structure (20), a second treatment structure (50), a third treatment structure (70) and a gas outlet structure (80) which are sequentially connected, the first treatment structure (20) is provided with a filter assembly for filtering tail gas, the second treatment structure (50) can add limestone and / or brucite to absorb and treat the tail gas, and the third treatment structure (70) can spray sodium alkali solution to spray and treat the tail gas. Through the above technical scheme, the preliminary treatment effect is achieved through filtering, the harmful gas in the tail gas can be adsorbed through limestone and / or brucite, the treatment performance of the tail gas can be better guaranteed, the tail gas is further treated through spraying in the third treatment structure, the tail gas treatment effect is further improved, and the overall structure is relatively simple and has higher practicality.

The invention discloses a method for preparing high-whiteness magnesium hydroxide by removing impurities from brucite in the field of inorganic nonmetallic mineral processing. The method comprises the following steps: crushing brucite raw ore into superfine powder, and mixing the superfine powder with a dispersing agent to prepare slurry; adding a complexing agent to remove impurities through a flotation process; carrying out modification reaction on the floated slurry and a specially-made sulfydryl-carboxyl bifunctional silicon-titanium composite oxide under an alkaline condition; and finally, stabilizing through a coupling agent and drying to obtain a high-whiteness product. The modified substance is prepared from cyanopropyl silane and titanate through hydrolysis, conversion of cyano groups into carboxyl groups, sol-gel conversion and calcination, and the unique bifunctional structure of the modified substance can effectively recognize and coat coloring impurities. The process is simple and environment-friendly, and the obtained magnesium hydroxide product is high in whiteness, good in dispersity and suitable for the field of high-end flame retardant and composite materials.

The application discloses a composite coating for low-carbon steel protection and a preparation method thereof, and belongs to the technical field of metal surface treatment and novel low-carbon building material. The composite coating comprises a low-carbon steel substrate and an inorganic transition layer formed by in-situ electrodeposition and directly attached to the surface of the substrate; the inorganic transition layer comprises a brucite layer and an aragonite layer generated by in-situ electrodeposition. The inorganic transition layer is combined with the low-carbon steel substrate through Fe-O-Mg covalent bonds, and the needle-shaped aragonite on the outer side of the inorganic transition layer can induce epitaxial growth of a subsequent functional coating, forming a component-interwoven interface transition zone. The preparation method adopts a step electrodeposition process, including a first stage of high current density deposition and a second stage of low current density deposition. The application realizes strong chemical combination and long-acting corrosion protection between the coating and the substrate by constructing a metal-inorganic connecting layer, and can be adapted to a calcium silicate carbonate cementitious material coating (preferably a gamma-C2S carbon mineralization coating) for metal corrosion protection.

The application of PCE-11 as a modifier in the flotation separation of brucite and serpentine relates to the field of brucite beneficiation and purification technology. This invention provides a flotation separation method for brucite and serpentine using PCE-11 as a modifier. By introducing PCE-11, the difference in floatability between brucite and serpentine during flotation is amplified, achieving effective separation of brucite and the gangue mineral serpentine. This invention has advantages such as high efficiency, low cost, no pollution, and simple process.

The invention provides silanolate-brucite composite powder as well as a preparation method and application thereof, and belongs to the technical field of photochemical detection of building materials. Active silane is modified by a natural product glycolic acid and is used for surface activation of natural high-magnesium brucite to form organic-inorganic hybrid core-shell structure composite powder, the glycolic acid silane is used as a shell, and the high-magnesium brucite is used as an inner core. According to the organic-inorganic hybrid core-shell structure composite material, a natural product derivative of silanolate and traditional inorganic mineral powder can be mutually combined together, so that the natural mineral powder not only has a visual fluorescence chromogenic function, but also has the characteristics of flame retardance and smoke suppression; according to the invention, unique advantages of glycolic acid silane and natural high-magnesium brucite are integrated on composite powder particles, so that high-valued application of natural mineral powder is realized.

A method of producing cement is provided The method comprises contacting brine with an alkali material to extract Mg2+ in the form of brucite from the brine, wherein the contacting is carried out at a pH of at least 10 and in the presence of a modifier for modifying a surface of the brucite. A method of producing concrete, and a cement and a concrete produced by the methods are also provided.

A method of drilling a wellbore into a subterranean geological formation includes drilling the subterranean geological formation to form the wellbore, then circulating an invert emulsion drilling fluid into the wellbore during the drilling to suspend cuttings formed during the drilling. The invert emulsion drilling fluid includes diesel, a primary emulsifier, a secondary emulsifier, a brine including water and a polished brine sludge (PBS) powder including halite in an amount of 55 to 75 wt. %, calcite in an amount of 25 to 40 wt. %, and brucite in an amount of 2 to 6 wt. %, based on the total dry weight of the PBS powder, at least one viscosifier, at least one weighting agent, and at least one alkali. The invert emulsion drilling fluid has an oil-to-water volume ratio of 90:10 to 70:30. The invert emulsion drilling fluid does not include calcium chloride.

The present disclosure relates to systems and methods for preparing highly pure brucite compositions.

The invention relates to a high-efficiency adsorbent grading proportioning adsorption column which adopts a two-section type adsorption column, a uniform distributor is arranged at the top of each section of adsorption column, so that gas or water uniformly passes through the adsorption column to form steady flow, and a valve and a sampling port are arranged at the joint of the two sections of adsorption columns and are used for dismounting and replacing the adsorption column and monitoring the content of pollutants; a first efficient adsorbent and a second efficient adsorbent are filled in the adsorption column, the first efficient adsorbent is made of brucite, the second efficient adsorbent is made of bentonite ore of Xinjiang Tokeson Kolle alkali ore, the first efficient adsorbent and the second efficient adsorbent are different in particle size and are densely filled in the adsorption column, and a full-effect adsorbent grading matching adsorption column is formed; through grading proportioning of the two efficient adsorbents, total-effect adsorption of atmosphere or water is realized. According to the invention, full-effect removal of different pollutants in atmosphere or water is realized.

The invention discloses magnesium slag non-sintered ceramsite and a preparation method, the magnesium slag non-sintered ceramsite comprises a ceramsite core and a ceramsite outer wall wrapping the outer surface of the ceramsite core, the ceramsite core comprises the following raw materials by mass content: 20-50% of magnesium slag, 45-80% of a siliceous raw material and 0.1-5% of a digestion promoter, and the molar ratio of the sum of calcium and magnesium to silicon is 0.4-1. The preparation method comprises the following steps: S1, carrying out primary granulation on the raw materials of the ceramsite core to obtain raw material balls; s2, mixing the raw material nodules prepared in the step S1 with raw materials of the outer wall of the ceramsite, wrapping the raw materials, and adhering the raw materials of the outer wall of the ceramsite to the surfaces of the raw material nodules to obtain an initial ceramsite green body; s3, the initial ceramsite blank is subjected to pre-curing and autoclaving treatment, and the magnesium slag unfired ceramsite is obtained. The problem of digestion expansion of periclase (MgO) and free calcium oxide (CaO) in the hydration process of the magnesium slag is solved; the hydrolysis speed of the gamma-C2S phase is increased through a hydrothermal reaction, and efficient utilization of the gamma-C2S phase is realized through a calcium (magnesium) silicon reaction.

Glass wool insulation comprises:a collection of intermingled glass fibres in the form of glass wool, the glass wool having a structure formed from the intermingled glass fibres and air-filled interstices between the intermingled glass fibres, the glass fibres being present in the glass wool insulation in a quantity of at least 70% wt;optionally an organic binder present in a quantity of less than 12% wt, the organic binder being distributed within the glass wool structure and serving to retain the collection of intermingled glass fibres in the form of glass wool; anda fire-resistance enhancer notably selected from the group consisting of: hydromagnesite, magnesium hydroxide, brucite, huntite, dolomite, calcium carbonate and combination thereof, the fire-resistance enhancer being present in an amount of 1-15% wt and being distributed within the glass wool structure.

The invention relates to the field of magnesium chloride production, in particular to a method and equipment for preparing magnesium chloride by an ore method. A device for extracting and separating magnesium chloride from high-magnesium-content ores such as dolomite, magnesite, forsterite and brucite through an acidolysis method and generating power is adopted, the ores are sorted, cleaned, smashed and ground into fine powder, the fine powder reacts with industrial hydrochloric acid in an acidolysis tank, clear liquid is sprayed out, and the magnesium chloride is obtained through step-by-step evaporation and segmented crystallization. Respectively collecting magnesium chloride, magnesium chloride and calcium chloride mixed salt and a calcium chloride-rich solution; and dehydrating the magnesium chloride by a one-step method to obtain anhydrous magnesium chloride, outputting the magnesium chloride and calcium chloride mixed salt into the leached clear liquid again, and circulating the sectional crystallization process to continuously produce the high-purity magnesium chloride. Furthermore, a thermoelectric conversion system based on the Seebeck effect is adopted, a large amount of heat released in the ore acidolysis process is recycled and used for power supply of the acidolysis tank system, and the maximization of comprehensive benefits is achieved.

The invention discloses a novel method for producing hydrogen by catalyzing water decomposition through a redox reaction by using a bivalent iron magnesite-containing material. The method comprises the following steps: coprecipitating a divalent iron source and a magnesium source under an anaerobic alkaline condition to form a turbid liquid containing divalent iron magnesite; promoting precipitation generation through a heating reaction, and obtaining a pure solid through washing and centrifugal separation; after the solid is dispersed in deoxidized water, the solid and water are subjected to an oxidation-reduction reaction under the heating and stirring conditions to continuously generate hydrogen. According to the invention, the reducibility of ferrous iron in the structure containing the bivalent iron magnesium stone is utilized, the structure containing the bivalent iron magnesium stone is used as an electron donor to realize hydrogen production, and meanwhile, the ferrous iron is oxidized into ferric iron. According to the method, the bivalent iron magnesite-containing material is applied to water catalytic cracking hydrogen production for the first time, the method has the advantages of mild reaction conditions, high hydrogen production efficiency, clean process, easily available raw materials and the like, and the new application of the material in preparation of clean energy is expanded.