12 results about "Peridot" patented technology

The invention discloses a wet-type large-surface repairing material and a preparation method thereof. The repairing material comprises the following components in percentage by mass: 20-30% of sintered magnesia coarse sand with the particle size of 10-5 mm and the mass percentage of 20-30%; the particle size of the sintered magnesia fine sand is 5-3mm, and the mass percent of the sintered magnesia fine sand is 5-15wt%; the grain size of the forsterite is 3-1 mm, and the mass percentage of the forsterite is 15-25 wt%; the particle size of the medium-grade magnesia is not greater than 2mm, and the mass percent is 15-25wt%; the particle size of the medium-grade magnesia fine powder is 150-200 meshes, the mass percent of the medium-grade magnesia fine powder is 10-15 wt%, the particle size of the magnesium-calcium-iron sand fine powder is 150-200 meshes, and the mass percent of the magnesium-calcium-iron sand fine powder is 1-8 wt%; 10 to 14 wt% of modified asphalt; and 0.5 to 1.5 wt% of industrial white oil. The repairing material disclosed by the invention is low in cost, environment-friendly and economical, has relatively high breaking strength, and is particularly suitable for a large-surface repairing material of a schreyerite steelmaking converter.

The application discloses cordierite-based microcrystalline glass adhesive for corundum-mullite ceramic pipes and a preparation method and application thereof, and is characterized in that cordierite microcrystalline glass powder and high-temperature frit are used as main raw materials, the high-temperature frit has a specific chemical composition, and interface reaction of the cordierite microcrystalline and the high-temperature frit can occur in the heat treatment process of pipe bonding, so that anorthite, pyromorphite, diopside, calcium-magnesium olivine and zirconite are generated on the surface of cordierite grains and serve as a wrapping layer of the cordierite grains, the mismatch of the thermal expansion coefficients between the glass phase and the cordierite grains can be effectively reduced, the residual thermal stress of the interface between the cordierite grains and the glass phase is reduced, the adhesive has high shearing strength, good thermal shock resistance and high-temperature durability, and thus the problem that there is no corundum-mullite ceramic heat pipe adhesive in the prior art is solved. The raw materials of the application are obtained from natural minerals, the preparation cost is low, the application has a wide market, and is favorable for popularization and application.

This invention provides a protective slag for continuous casting with a diameter of φ1000-1200mm and its application, relating to the field of steelmaking auxiliary materials technology. It comprises 4-8 parts fluorite, 3-10 parts cement clinker, 1-4 parts white alkali, 22-30 parts coke powder, 1-6 parts bentonite, 8-14 parts bauxite powder, 8-15 parts magnesium olivine powder, 32-42 parts blast furnace slag powder, and 2-3 parts binder. By increasing the carbon content, the temperature field difference at different parts of the large cross-section of the liquid surface is effectively alleviated, eliminating the shrinkage porosity in the middle of the continuously cast billet. By increasing the proportion of Al2O3 and MgO, the binary basicity of the prepared protective slag is reduced, the melting temperature is increased, and the crystallization temperature is increased. Combined with increasing the amount of coke powder added, not only can the melting rate be controlled, but also the three-layer structure of the protective slag in the crystallizer can be controlled, resulting in a suitable liquid slag layer thickness, a small sintered layer thickness, and no large slag streaks. The surface of the continuously cast billet shell is less prone to defects, and overall defects are fewer.

The application provides a low-cost composite coating magnesium drainage agent and a preparation method thereof, and belongs to the technical field of metallurgical refractory materials. The components and weight percentages of the drainage agent are as follows: 92-97% of forsterite, 2-5% of coating mixed powder and 1-3% of high-temperature binder; wherein the components and weight percentages of the coating mixed powder are as follows: 30-50% of fly ash, 30-50% of blast furnace water slag, 10-30% of limestone and 0.5-2% of carbon. The magnesium drainage agent prepared by the application has the advantages of low price, no pollution to the environment, no destruction to the metallurgical environment of the tundish, convenient use and the like, and the opening pouring effect is stable during use.

The present invention relates to the fields of carbon sequestration and mineral utilization, and particularly relates to a method for mineralizing CO2 by means of strengthened forsterite. The method comprises the following steps: pretreating forsterite by using a strong acid, so as to obtain pretreated forsterite and a magnesium-containing solution; activating the pretreated forsterite, so as to obtain activated forsterite; heating the activated forsterite and ammonium sulfate for a reaction, so as to obtain magnesium sulfate and ammonia gas; and mixing the magnesium-containing solution, the magnesium sulfate, the ammonia gas and a CO2-containing gas, so as to obtain magnesium carbonate and ammonium sulfate. In the present invention, by means of a pretreatment and activation, the reaction activity of forsterite is improved, conditions are provided for achieving a high conversion rate in a subsequent solid-solid contact reaction, and the problems of high energy consumption of traditional thermal decomposition of ammonium sulfate and a low conversion rate of a solid-solid reaction are solved.

The application discloses an energy-saving refractory aggregate and a preparation method and application thereof, and belongs to the technical field of refractory materials. The energy-saving refractory aggregate is prepared from serpentine and magnesite tailing fine powder as main raw materials, and auxiliary materials, and is prepared through granulation, casting or machine pressure forming and low-temperature drying (110 DEG C-200 DEG C). The energy-saving refractory aggregate prepared by the application has low density, small thermal conductivity and excellent heat preservation performance, can utilize the in-situ reaction of serpentine and magnesite tailing fine powder at high temperature to generate forsterite binding phase and periclase slag resistance phase, and can simultaneously construct a uniform micro-pore structure, and can be widely applied to the preparation of various refractory materials such as intermediate ladle dry type material and coating material as a basic raw material. The application does not need high-temperature calcination, fully utilizes waste mineral resources, and realizes energy saving and environmental protection.

The application belongs to the technical field of refractory materials, and discloses a slag dam for tundish and a preparation method thereof. The slag dam for tundish comprises the following components in percentage by weight: 30-38% of forsterite with a particle size of 15-8mm, 5-15% of recycled magnesium-aluminum spinel with a particle size of 5-3mm, 10-25% of recycled magnesium-aluminum spinel with a particle size of 3-1mm, 10-20% of fused magnesite with a particle size of 1-0mm, 10-20% of fused magnesite with a particle size of 180 meshes, 2-8% of light-burned magnesia powder with a particle size of 1000 meshes, 1-5% of silicon carbide with a particle size of less than 240 meshes, and 2-6% of silica ash with a particle size of less than 2 microns; and 0.1-0.15% of dispersant, 0.01-0.02% of retarder and 0.06-0.08% of anti-explosion fiber account for the total weight of the above raw materials. The slag dam for tundish has the advantages of low cost, small water consumption, good slag resistance, high erosion resistance and long service life.

The application discloses a kind of polypropylene composition and its preparation method and application, it is related to the technical field of polymer materials.The polypropylene composition includes the following weight parts of raw material components: polypropylene resin 40-70 parts;Flame retardant 10-50 parts;Fluxing agent 5-30 parts;Pore-forming filler 10-40 parts;Functional filler 1-10 parts;The flame retardant includes carbon source and acid source;The pore-forming filler includes at least one of wollastonite, sepiolite, olivine, mica powder, montmorillonite;The functional filler includes at least one of barium phosphate, aluminium hypophosphite, magnesium phosphate, zirconium hydrogen phosphate, calcium phosphate;The weight ratio of pore-forming filler and functional filler is (1-3) : 1.The polypropylene composition has excellent flame retardant performance and mechanical properties.

The present application relates to the field of oil and gas well cementing engineering, and discloses a cement strength stabilizing material, an oil well cementing cement slurry system and application thereof.The cement strength stabilizing material comprises 30-80 parts by weight of a first strength stabilizing material and 20-70 parts by weight of a second strength stabilizing material; wherein the first strength stabilizing material is a mixture of quartz sand and glass powder; and the second strength stabilizing material is a mixture of at least two selected from spodumene, andalusite, olivine, leucite, garnet, pyrope, almandine, grossular, epidote, nepheline, staurolite, spinel and graphite.The cement slurry system containing the cement strength stabilizing material of the present application is suitable for both high-temperature direct forming working conditions of deep wells and super-deep wells and low-temperature forming and high-temperature service working conditions of heavy oil steam production, has good comprehensive performance, and has a broad market application prospect.

The present application relates to the technical field of underground hydrogen development, and is a method for generating hydrogen by injecting peridotite nanofluid into an underground water layer, comprising the following steps: injecting peridotite nanofluid into a target underground saline water layer through an injection well; reacting the peridotite nanofluid with the formation water after being injected into the target underground saline water layer; monitoring the change of formation pressure; and when hydrogen is monitored in a production well, hydrogen is produced. The method can significantly improve the reaction efficiency of peridotite and formation water, shorten the hydrogen production induction time, improve the hydrogen production rate and cumulative hydrogen production, and improve the stability of the system by peridotite nanofluid treatment, surface modifier stable dispersion and synergistic promotion of a nickel source, and in combination with a simulated underground saline water layer environment.

The invention discloses a cordierite-based glass ceramic binder for a corundum-mullite ceramic tube and a preparation method and application of the cordierite-based glass ceramic binder for the corundum-mullite ceramic tube. Cordierite glass ceramic powder and a high-temperature frit are used as main raw materials, and the high-temperature frit with specific chemical composition is adopted to prepare the cordierite-based glass ceramic binder for the corundum-mullite ceramic tube. In the heat treatment process of pipeline bonding, cordierite microcrystals and high-temperature frits can be subjected to an interface reaction, anorthite, anorthite, diopside, calcium forsterite and zirconite are generated on the surfaces of cordierite crystal grains and serve as wrapping layers of the cordierite crystal grains, mismatch of thermal expansion coefficients between a glass phase and the cordierite crystal grains can be effectively reduced, and the bonding performance of the pipeline is improved. The residual thermal stress of an interface between cordierite grains and a glass phase is reduced, so that the adhesive has high shear strength, good thermal shock resistance and high-temperature durability, and the problem of lack of a corundum-mullite ceramic heat transfer pipeline adhesive in the prior art is solved. The raw materials are selected from natural minerals, the preparation cost is low, the market is wide, and application and popularization are facilitated.

The invention discloses a composite agent for pyrogenic dezincification of steel dust and mud and a preparation method and application thereof, and belongs to the technical field of resourceful treatment of steel dust and mud. The composite agent is prepared from the following raw materials: reduced carbon, humic acid, molasses, a fluxing agent, a pore forming agent and a stabilizer; the reducing carbon is at least one of lignite and coke powder; the stabilizer is forsterite or magnesite. The preparation method comprises the following steps: S1, pretreating reduced carbon; s2, sequentially dispersing molasses and humic acid in water, then adding the reduced carbon pretreated in the step S1, a fluxing agent, a stabilizer and a pore forming agent, and mixing to form slurry; s3, granulating the slurry to obtain particles; and S4, carrying out pore forming on the particles to obtain the steel dust and mud pyrogenic process dezincification composite reagent. The steel dust and mud pyrogenic process dezincification composite agent is high in strength, large in specific surface area, not prone to agglomeration in the pyrogenic process sintering process and higher in zinc reduction efficiency.