48 results about "Olivine" patented technology

The invention relates to a method for sequestering CO2, which comprises the steps of providing a starting product comprising at least 20% by mass of one or more of the following components, ultramafic rocks, weathering products of ultramafic rocks, olivine and / or industrial waste materials, homogenizing the starting product and hydro-thermally treating the homogenized starting product in a heat treatment apparatus at a temperature of above 100° C. for at least 24 hours. Furthermore, the converted starting product is dewatered of bound water by means of thermal treatment and / or reaction grinding. Subsequently, the product thus obtained is contacted with CO2, wherein the latter is bound.

A carbon-sequestering concrete composition and method of production are disclosed. The composition comprises geopolymer binder components, aggregates, and alginate beads formed from brown algae powder through ionic gelation. The alginate beads significantly increase CO2 absorption surface area compared to algae powder, creating a matrix across the concrete surface that enhances long-term sequestration and improves durability. The beads interact synergistically with other concrete components, including geopolymers, fly ash, and ground granulated blast furnace slag, to enhance pozzolanic reactions and create additional sites for carbon dioxide capture. The alginate beads also facilitate the dissolution of minerals like olivine, further enhancing carbon capture. The composition demonstrates superior carbon sequestration capabilities, enabling sustained CO2 absorption throughout its service life. The method includes forming alginate beads, incorporating them into the concrete mixture, and allowing for initial hardening and drying processes that promote carbon dioxide absorption directly from the air.

The invention discloses simulated lunar soil for engineering and a preparation process thereof, the simulated lunar soil has a multilayer structure design, and comprises a basic mineral structure layer, a surface activity control layer and a simulated space environment effect layer. The basic mineral structure layer is prepared from modified olivine, titanium-rich basalt, rare earth doped plagioclase, calcium phosphate minerals, nano iron particles and vitreous minerals according to a specific proportion; the surface activity control layer adopts an atomic layer deposition technology to form a nano oxide layer on the surface of the mineral particles; the simulated space environment effect layer is formed through low-pressure helium ion bombardment and ultraviolet irradiation. The preparation process comprises the steps of intelligent graded crushing, mineral phase change control, surface modification and activation treatment, multi-parameter synchronous regulation and control and the like. The simulated lunar soil can be produced in a customized mode according to different lunar area characteristics, the matching degree with real lunar soil physical characteristics exceeds 90%, the ground testing precision of lunar exploration equipment is remarkably improved, and technical support is provided for lunar on-site resource utilization and lunar base construction.

The present disclosure provides methods and systems for processing of ultramafic materials. The ultramafic materials may comprise olivine. The methods and systems described herein may include a high-pressure grinding roll (HPGR) to process the ultramafic materials. The processed ultramafic materials may be added to an aqueous solution to increase an alkalinity of the solution. The processed ultramafic materials may capture carbon dioxide (e.g., atmospheric carbon dioxide.)

Described are methods for producing industrial gases (e.g., hydrogen, ammonia, and / or methane) using ferrous iron-containing materials (e.g., olivine) while concurrently sequestering carbon dioxide. The process may involve mixing a ferrous iron-containing material with water and, in some examples, a reaction accelerant. The mixture may be heated to 100-300°C to initiate the oxidation of ferrous cations (Fe2+) to ferric cations (Fe3+) while reducing hydrogen (from water) and / or methane (from water and carbon dioxide, when carbon dioxide is introduced into the ferrous iron-containing mixture). In some examples, carbon dioxide may be added later (after recovering hydrogen) to form carbonates. Specifically, carbon dioxide may be injected at a high pressure (e.g., about 200 bar) post-oxidation to facilitate mineralization, using the exothermic reaction to maintain a favorable temperature. In some examples, metal complexing / chelating reagents are added to bind trace metals such as nickel, copper, cobalt, and platinum group metals for recovery.

The application relates to the technical field of building materials, and discloses a kind of negative carbon high-performance concrete and a preparation method thereof, adopt ferrochrome slag as aggregate, utilize slag powder, silica fume and waste stone powder to partially replace cement to prepare concrete, which not only reduces natural resource and energy consumption, reduces CO2 emission, but also promotes efficient utilization of industrial solid waste; in addition, the mechanical interlocking structure is formed between the spherical pores on the surface of ferrochrome slag and cement stone, which can improve the interface microstructure between aggregate and cement paste; at the same time, the olivine phase on the surface of the spherical pores dissolves and occurs carbonation reaction under high-temperature alkaline environment during high-temperature carbonization process, and needle-like magnesium carbonate crystals are generated in the spherical pores to fill the interface, thereby further optimizing the interface microstructure and improving the overall mechanical properties of the concrete.

The invention relates to the technical field of precious metal metallurgy, and discloses a method for enriching precious metal. The method comprises the following steps: in the presence of a reducing agent, contacting and mixing a precious metal-containing material, a smelting auxiliary agent and a calcium-containing slag former to obtain a mixture; and the mixture is subjected to smelting treatment, and olivine phase-containing molten slag and a precious metal-containing enriched phase are obtained. According to the method for enriching the precious metal, the melting temperature and the viscosity during melting can be reduced, the slagging success rate is high, and the molten slag containing the olivine phase and the enriched phase containing the precious metal are obtained; and moreover, the molten slag and the enriched phase are simple in phase splitting, enrichment of the precious metal is further promoted, and the enrichment multiple of the precious metal is increased.

The application relates to a high-selectivity ilmenite flotation process, and belongs to the technical field of flotation, and aims to solve at least one of the problems of poor ilmenite selectivity and poor collecting performance of the existing flotation method. In the ilmenite flotation process, a specific structure of a collector is selected, two hydroxyl imino groups are introduced into the same molecular structure, the solid-philic group formed by the two hydroxyl imino groups can improve the combination capacity between the collector and metal ions; the adsorption stability of the whole collector molecule on the mineral surface is enhanced, the collecting performance and selectivity of the collector molecule are improved; meanwhile, the raw ore is subjected to a plasma pretreatment method, the mineral surface structure can be changed, the impurities on the mineral surface can be reduced, the reaction activity of the mineral surface can be enhanced, the surface property difference between ilmenite and magnesium olivine can be improved, the collector molecule can chemically react with the ilmenite surface under weak acid conditions, the ilmenite flotation separation efficiency is improved, and the amount of sulfuric acid is reduced.

The present invention discloses a beneficiation method for vanadium-titanium magnetite containing olivine, including beneficiation of vanadium-titanium iron concentrate, beneficiation of coarse-fine mixed titanium concentrate, and beneficiation of ultrafine-grade titanium concentrate. In the iron beneficiation of the present invention, multi-stage grinding and separation with three or more stages are implemented. Weak magnetic scavenging is set for each stage of iron separation, which not only ensures the quality of vanadium-titanium iron concentrate while reducing over-grinding of ilmenite, but also reduces the iron separation cost while protecting the subsequent strong magnetic equipment for titanium separation; the coarse-grained gravity separation concentrate and the fine-grained gravity separation concentrate are mixed and fed into the titanium separation grinding and classification, ensuring the full dissociation of the useful mineral ilmenite and creating conditions for further enrichment in the subsequent process; the fine-grained gravity separation tailings, the tailings from the third and fourth stages of iron separation are concentrated and de-sludged and then further enriched to obtain ultrafine-grade titanium concentrate, greatly improving the problem of large loss rate of titanium caused by the large content of ultrafine-grade ilmenite and high TiO2 grade in the fine-grained gravity separation tailings. At the same time, ultrafine-grade titanium concentrate is obtained, and the overall titanium separation recovery rate is improved.

The present invention provides a method of forming a soil amendment, the method comprising: (a) providing a carbon dioxide source; (b) adsorbing carbon dioxide from the carbon dioxide source with sodium oxide of sodium bentonite clay to form sodium carbonate; (c) reacting the sodium carbonate with olivine magnesium silicate to consume the sodium carbonate and form magnesium carbonate and sodium silicate; (d) reacting the sodium silicate with carbon dioxide to consume the sodium silicate, reform sodium carbonate and form silica; and (e) forming the soil amendment by combining the produced magnesium carbonate with the silica. Steps (c) and (d) continue in a continuous manner until the olivine magnesium silicate is consumed. Soil amendments formed according to these methods are also described.

The invention belongs to the field of crude sand of quartz sand for casting, and particularly relates to composite quartz sand which is low in cost, low in energy consumption, low in linear thermal expansion rate and high in refractoriness and a preparation method of the composite quartz sand. The preparation method of the composite quartz sand comprises the following steps: 1) uniformly mixing quartz sand, bauxite, zircon powder, olivine powder, chromite powder, calcium carbonate, magnesium oxide, silicon phosphate and dextrin in a bowl-shaped sand mixer; (2) adding one or more adhesives such as phosphate, water glass, hydrated silicon dioxide and dextrin, and uniformly mixing; and 3) roasting the mixed material at the temperature of less than or equal to 400 DEG C to obtain the composite quartz sand.

A method for in-situ sequestration and mineralization of CO2 includes providing an olivine formation (110) having a temperature of 100 to 200 °C, at least one injection wellbore (120) that connects a ground surface (130) and the formation (110), and providing an aqueous fluid to the formation (110). The method further includes introducing a pH adjuster to the formation (110) to adjust pH of the aqueous fluid to the range of from 7 to 8, injecting CO2 into the subterranean formation through the injection wellbore (120), dissolving CO2 in the aqueous fluid, and reacting CO2 with magnesium in the olivine. A system for in-situ sequestration and mineralization of CO2 includes an olivine formation (110), an aquifer (410) in a vicinity of the formation (110), at least one injection wellbore (120) configured to inject CO2 into the formation (110), and at least one transfer wellbore (420) connecting the injection wellbore (120) and the aquifer (410) to provide an aqueous fluid from the aquifer (410) to the formation (110).

The application relates to the technical field of paint, in particular to a low-cost dry powder paint special for alcohol-based casting and a preparation method thereof, which comprises the following raw materials in parts by weight: 40-60 parts of mica powder, 20-40 parts of attapulgite, 10-20 parts of kaolin, 2-4 parts of polyvinyl butyral, 4-6 parts of powder, 6-10 parts of additives, and 4-6 parts of bauxite. In the application, solid waste red mud is used as a binder core base material, the surface inert oxide layer of the red mud is stripped through oxalic acid solution activation, the high-activity silicate-aluminate porous framework is exposed, the low-cost bonding system with a three-dimensional network structure is constructed through ball milling and calcium lignosulfonate / temperature-sensitive monomer composite modification, and the bonding durability is enhanced through the ion crosslinking effect of beta-hemihydrate gypsum and magnesium olivine in the mixture. The comprehensive performance of the dry powder paint is ensured, the solid waste replaces traditional high-price silica sol and resin and other raw materials, and the raw material cost is significantly reduced.

The invention discloses a method for manufacturing accessories in a steel tundish by using a basic refractory material. The method comprises the steps of preparing, mixing, die filling and forming. In the mixing step, the dead burnt magnesia, the olivine sand and the binder prepared in the preparation step are mixed according to a specific proportion to obtain the castable refractory material composition. In the step of die filling, the castable refractory material composition and water are mixed according to a specific proportion and filled into a die for forming. And finally, the molding steps are demolding and drying to obtain the refractory material unit.

The invention relates to a method for producing a vacuum pump stator part obtained by casting cast iron or steel, the vacuum pump comprising a stator (2) and two rotors (3) accommodated in at least one pumping chamber of the stator (2), the rotors (3) being configured to rotate in the pumping chamber in order to drive a gas to be pumped between a suction port (4) and a discharge port (5) of the vacuum pump, the stator part being made in a mould that accommodates at least one sand core (15, 16) comprising a majority of sand selected from one or more of the following sands: - artificial globular ceramic sand; - chromite sand; - bauxite sand; - zircon sand; - kerphalite sand; - olivine sand, wherein the surfaces of the stator part (2) produced by casting that are to be exposed to the pumped gases are coated with a coating based on nickel alloy, such as a nickel-phosphorus coating.

A method for producing magnesium and forsythite by silicon-thermal method using magnesite resources belongs to the technical field of magnesium smelting. The method uses vacuum or relative vacuum technology, takes magnesite resources as raw materials, and uses ferrosilicon as a reducing agent. The method produces magnesium metal and separates the produced magnesium slag to obtain metal iron and high-quality magnesium-silicon forsythite, realizes high-value and full-quantitative utilization of the magnesium slag, and avoids large storage of the magnesium slag. Meanwhile, the method accurately judges the calcination endpoint based on online detection of CO2 concentration, realizes calcination-reduction integration, promotes the reaction of SiO2 and MgO in the magnesium slag to generate magnesium-silicon forsythite by adjusting the temperature and atmosphere, and can be directly used for refractory materials or building materials, thereby improving the resource utilization rate and greatly shortening the production cycle.

This invention discloses a method for preparing high-purity bulk polycrystalline olivine under hot isostatic pressing, comprising: completely sealing olivine sample powder under a vacuum of 10... –3 The sample chamber was placed in a steel cladding; the steel cladding was placed inside the graphite furnace cylinder of the high-pressure vessel of a hot isostatic pressing (HIP) apparatus, and a graphite sealing cap was placed on top; using argon as the pressure transmission medium, a multi-gradient HIP forming method of first increasing pressure and then increasing temperature was used to raise the temperature inside the cylinder sample chamber to 1200 °C and the pressure to 99.7 MPa, and the temperature and pressure were maintained for 4.8 hours; a multi-gradient cylinder cooling and depressurization method was used to reduce the temperature inside the sample chamber to 174 °C and the pressure to 57.2 MPa; finally, the pressure was released and the sample chamber was cooled to room temperature to obtain a polycrystalline dipyroxene peridotite aggregate; this method fills the technical gap in the preparation of large-volume experimental samples of high-density polycrystalline dipyroxene peridotite aggregates under high temperature and high pressure conditions.

The present invention relates to the beneficiation of low-grade chromite ores in the mining industry. Specifically, the invention addresses the prevention of waste of ores having a chromite content of less than 5%, particularly those comprising olivine, and the economic recovery of such resources. As per the invention, the method steps and system equipment employed accordingly comprise subjecting the powdered ore particles to magnetic pre-separation at a field intensity of 9,000-10,000 Gauss before gravity separation, thereby ensuring that at least 30% of the gangue minerals, primarily comprising olivine, are discarded as a dense, clean residue, resulting in a pre- concentrate with a chromite grade of at least 7% suitable for gravity-based separation. The process can then continue with gravity-based separation and, if necessary, additional magnetic separation.

The present invention relates to a method for producing a composite material from a cementitious body, aggregate, and reinforcing material. The cementitious body is produced by preparing a starting product containing at least 20% by mass of one or more components from ultramafic rock, weathered ultramafic rock, olivine, and / or industrial waste; homogenizing the starting product; and hydrothermally treating the homogenized starting product in a heat treatment apparatus at a temperature exceeding 100°C for at least 12 hours. Furthermore, the bound water of the converted starting product is dehydrated by heat treatment and / or reactive grinding. Subsequently, the converted and dehydrated starting product is used as a binder, and hardening water is added for hardening. The water / binder ratio is 1:2 or less. Before, after, and / or simultaneously with the addition of hardening water, aggregate and reinforcing material are added to the converted and dehydrated starting product to improve its load-bearing capacity. The reinforcing material is resistant to pH values ​​below 11 and / or provides protection against pH values ​​below 11. Additionally or alternatively, additives to increase the pH value of the pore solution in the cementitious material can be added to the starting product of the cementitious material.

The application discloses an A2O sewage treatment system and process for carbon emission reduction of sewage alkalization, and the system comprises sequentially connected anaerobic fermentation tanks, anoxic fermentation tanks, aerobic aeration tanks and sedimentation tanks, and the gas outlet of the anaerobic fermentation tank is connected with a gas production and purification column; magnesium-iron olivine is added into the aerobic aeration tank; the process uses alkaline minerals to purify the methane gas produced by the anaerobic tank in the anaerobic-anoxic stage, and at the same time, olivine is added in the aerobic process stage to improve the alkalinity of the treated sewage, and the regenerated water after alkalization is discharged into the sea to realize seawater alkalization and carbon sink increase, and offset part of the carbon emission in the sewage treatment process.

A vacuum pump comprising a stator (2) and two rotors received in at least one pumping chamber of the stator (2), the rotors being configured to rotate in the pumping chamber to drive a gas to be pumped between a suction port (4) and a discharge port (5) of the vacuum pump, characterized in that the stator (2) comprises at least one stator piece obtained by casting iron or steel in a mold receiving at least one sand core comprising a majority of sand selected from one or more of the following sands: artificial globular ceramic sand, chromite sand, bauxite sand, zircon sand, kerphalite sand, olivine sand, the surfaces of the cast stator piece (2) intended to be exposed to the pumped gases being coated. Figure 1

A method of making a cathode active material includes providing a first mixture including a mixed metal composition and phosphoric acid or a mixed metal composition and water. The mixed metal composition includes nickel, cobalt, manganese, or a combination thereof. A salt of iron, manganese, cobalt, or a combination thereof is added to adjust the stoichiometry of the mixed metal composition. The stoichiometrically-adjusted mixed metal composition in water can be contacted with a phosphorus-containing compound. The stoichiometrically-adjusted mixed metal phosphate is further contacted with a lithium-containing compound to provide the cathode active material having at least one phase having an olivine structure.

A carbon-sequestering concrete composition and method of production are disclosed. The composition comprises geopolymer binder components, aggregates, and alginate beads formed from brown algae powder through ionic gelation. The alginate beads significantly increase CO2 absorption surface area compared to algae powder, creating a matrix across the concrete surface that enhances long-term sequestration and improves durability. The beads interact synergistically with other concrete components, including geopolymers, fly ash, and ground granulated blast furnace slag, to enhance pozzolanic reactions and create additional sites for carbon dioxide capture. The alginate beads also facilitate the dissolution of minerals like olivine, further enhancing carbon capture. The composition demonstrates superior carbon sequestration capabilities, enabling sustained CO2 absorption throughout its service life. The method includes forming alginate beads, incorporating them into the concrete mixture, and allowing for initial hardening and drying processes that promote carbon dioxide absorption directly from the air.

A method for in-situ sequestration and mineralization of CO2 includes providing an olivine formation having a temperature of 100 to 200° C., at least one injection wellbore that connects a ground surface and the formation, and providing an aqueous fluid to the formation. The method further includes introducing a pH adjuster to the formation to adjust pH of the aqueous fluid to the range of from 7 to 8, injecting CO2 into the subterranean formation through the injection wellbore, dissolving CO2 in the aqueous fluid, and reacting CO2 with magnesium in the olivine. A system for in-situ sequestration and mineralization of CO2 includes an olivine formation, an aquifer in a vicinity of the formation, at least one injection wellbore configured to inject CO2 into the formation, and at least one transfer wellbore connecting the injection wellbore and the aquifer to provide an aqueous fluid from the aquifer to the formation.

The invention designs a process for replacing olivine sand with sea sand to serve as facing sand, and relates to the technical field of new materials. The sea sand is pretreated through the processes of washing, drying, screening and the like; the pretreated sea sand and water glass are stirred and mixed to obtain mortar, the mortar is added into a sand mold for compaction operation, and sea sand molding sand is obtained; molten metal is poured into the sea sand molding sand, and after pouring is completed, heat preservation treatment is conducted on a casting; after heat preservation is finished, the used sea sand is treated again through the high-temperature sand recycling technology of the sea sand, and recycled sand is obtained; the recycled sand is subjected to winnowing treatment, and sea sand subjected to regeneration treatment is obtained; carrying out secondary sand mixing on the sea sand subjected to regeneration treatment and water glass to obtain new sea sand molding sand; according to the method, the sea sand is adopted to replace olivine sand to serve as the facing sand, the prepared molding sand for secondary sand mixing is smooth in surface and has the cavity strength meeting the standard, the sea sand can more evenly fill the mold space, and cavities, bumps and air holes are prevented from being formed.

The present invention relates to a method for preparing a CO2 capture device in which olivine nanoparticles are deposited on a substrate by magnetron sputtering technique. A CO2 capture device obtained by the above method is also presented.

The application discloses a method for reconstructing and synergistically detoxifying magnesium olivine based on waste incineration fly ash, and relates to the technical field of solid waste treatment.The application creates a low-cost innovative mode of "waste treatment with waste", directly uses hazardous waste incineration fly ash as a chemical activator of natural magnesium olivine, and does not need to additionally add expensive reagents such as strong acid, strong base or ammonium salt.Through early component detection and regulation of the content of chloride salt in the fly ash to 20%-25%, while limiting the content of inert components such as SiO2, Al2O3 and Fe2O3, the originally harmful chloride salt in the fly ash is converted into a key molten salt medium required for subsequent high-temperature reconstruction, which significantly reduces the preparation cost of magnesium olivine activation and CO2 mineralization materials.

The invention relates to a method for manufacturing a stator part of a vacuum pump obtained by casting cast iron or steel, comprising a stator (2) and two rotors (3) housed in at least one pump chamber of said stator (2), these rotors (3) being configured to rotate in said pump chamber, the invention relates to a vacuum pump (1) comprising a stator element (2) made in a mould containing at least one sand core (15, 16) mainly comprising sands selected from one or more sands selected from the group consisting of artificial spherical ceramic sands, chromite sands, bauxite sands, zircon sands, hornblende sands, olivine sands, in order to drive the gas to be pumped between the suction opening (4) and the discharge opening (5) of the vacuum pump, said stator element being made in a mould containing at least one sand core (15, 16), the surface of the stator part (2) made by casting, which is to be exposed to the pumped gas, is coated with a coating.

The invention discloses a method for extracting magnesium from magnesium-containing silicate tailings, and belongs to the technical field of comprehensive utilization of mineral resources. The magnesium-containing silicate tailings are ground and subjected to a curing reaction with concentrated sulfuric acid, a serpentine phase, an olivine phase and a diopside phase are destroyed, and soluble magnesium sulfate clinker is generated; the soluble magnesium sulfate clinker is subjected to water leaching treatment, and magnesium-containing leachate is obtained; the magnesium-containing leachate is sequentially subjected to oxidation impurity removal and precipitation impurity removal, and a magnesium sulfate solution is obtained; carrying out precipitation reaction on the magnesium sulfate solution to obtain a magnesium hydroxide product; the magnesium-containing silicate tailings comprise more than 70 wt% of serpentine phase, olivine phase and diopside phase. According to the method disclosed by the invention, efficient extraction of magnesium is realized, and meanwhile, an effective way for resource utilization is provided for a large amount of stockpiled tailings difficult to treat.

Method of reacting carbon dioxide with a metal silicate, preferably a nesosilicate material such as olivine. The metal silicate particulate material is placed in a container having a container wall, with water in a bed or in a suspension in the water, and the particulate material is agitated. The agitation may occur via an air stream that is blown into the container via a diffusor. Alternatively, the particulate material is agitated by vibrating at least a part of the wall of the container. The abrasion of the particles that collide with each other continuously cleans the particle surface, and maintains a high reaction rate, allowing new CO2 to react with a continually refreshed interface.