18 results about "Metasilicate" patented technology

The invention relates to a composite metasilicic acid mineralized filter element profile as well as a preparation method and application thereof, and relates to the technical field of water purifiers, the composite metasilicic acid mineralized filter element profile is prepared from the following raw materials in parts by weight: 60 to 80 parts of metasilicic acid mineralized carbon material and 20 to 40 parts of bonding material; the metasilicic acid mineralized carbon material is prepared from the following raw materials in parts by weight: 30-60 parts of metasilicic acid mineralized powder, 30-60 parts of activated carbon powder, 0.3-2 parts of an antibacterial agent, 0.2-1 part of a pore forming agent and 0.5-5 parts of a stabilizer. According to the composite metasilicic acid mineralization filter element profile provided by the invention, the formula of the filter material is designed, so that the composite metasilicic acid mineralization filter element profile has a good specific surface area, the contact area between active ingredients such as mineralization materials and water is ensured, the composite metasilicic acid mineralization filter element profile not only has the adsorption, harm removal and impurity removal functions of activated carbon, but also can separate out mineral substances, and is beneficial to realizing stable release of metasilicic acid.

To provide a method for producing coated sand by which a mold having high strength can be obtained in spite of being derived from reclaimed sand.SOLUTION: A method for producing coated sand includes a step (1) of mixing aggregates (A) having an acid consumption of 25mL or more and 100mL or less with a metasilicate (B).SELECTED DRAWING: None

The invention discloses a polycarbonate material with high CTI (Comparative Tracking Index). The polycarbonate material comprises the following components in parts by weight: 70-90 parts of polycarbonate, 5-15 parts of nano titanium dioxide, 3-8 parts of metasilicate, 0.3-0.5 part of a coupling agent and 0.5-1 part of a lubricant. The invention further provides a preparation method and application of the high-CTI polycarbonate material. According to the high-CTI polycarbonate material and the preparation method and application thereof provided by the invention, the obtained polycarbonate material has excellent arc resistance and tracking resistance, also has good impact resistance and temperature resistance, and can be widely applied in scenes requiring strict electrical safety performance.

To provide a method for producing dry coated sand that can manufacture molds with excellent mold strength and surface strength. [Solution] A method for producing dry coated sand, comprising the step (1) of mixing water with refractory aggregate A having an inorganic binder layer formed on its surface containing an inorganic binder containing a metasilicate hydrate, A method for producing coated sand, wherein the mass ratio of the inorganic binder water (a component of the inorganic binder other than water) to the water in the coated sand (mass of water in the coated sand / mass of the inorganic binder water) is 1.00 to 1.60.

A method for producing dry inorganic coated sand includes: a roasting step (R) for roasting waste casting sand (A0) in which an inorganic binder (b0) is used; and a mixing step (M-I) for mixing the waste casting sand (A1) obtained in the roasting step (R) with an inorganic binder composition (b1) containing a metasilicate.

The invention discloses a preparation method of a slow-release metasilicic acid mineralization material, which comprises the following steps: adding ore powder into a dilute acid solution for hydrothermal reaction to obtain modified metasilicic acid ore powder; and mixing a cationic polymer, a metal oxide and the modified metasilicic acid mineral powder, and carrying out hydrothermal self-assembly reaction to obtain the self-assembly coated powder modified metasilicic acid mineralization material, and adding the self-assembled coated powder modified metasilicic acid mineralization material into a surface hydrophobic modifier, and carrying out surface hydrophobic modification reaction to obtain the slow-release metasilicic acid mineralization material. According to the invention, the problem that metasilicic acid is slowly dissolved from silicate ore at present is solved, the consumption of metasilicic acid in a soaking state is reduced, the service life of the material is prolonged, and meanwhile, the overhigh content of mineral elements in soaking water is avoided.

A method of degrading organic contaminants disposed in an aqueous medium, the method including contacting the aqueous medium with a particulate crystalline nanocomposite and irradiating the aqueous medium with radiation having a wavelength of from about 100 to about 800 nm. The particulate crystalline nanocomposite includes: a monoclinic bismuth oxide (Bi2O3) crystalline phase; a calcium metasilicate (CaSiO3) crystalline phase; and, a graphitic-carbon nitride (g-C3N4) crystalline phase, wherein at least a fraction of the graphitic-C3N4 is in the form of mesoporous nanosheets.

The present invention relates to a method for producing coated sand, the method comprising a step (1) of mixing an aggregate (A) having an acid consumption of 25 to 100 mL with a metasilicate (B). According to the present invention, it is possible to provide a method for producing coated sand that enables production of a mold having high strength, even when derived from recycled sand.

The inorganic precoated sand is a dry inorganic precoated sand having foundry sand and a second coating layer, the foundry sand having one or two aggregates selected from reclaimed sand (A) and fire-resistant aggregates (B) and a first coating layer located on the surface while covering the aggregates, the second coating layer being located on the first coating layer of the foundry sand and containing metasilicate, the refractory aggregate (B) contains SiO2, and the cation exchange capacity (CEC) of the foundry sand is 3 mmol (+) / kg or more and 40 mmol (+) / kg or less.

Provided is a two-layer casting mold that makes it possible to suppress gas defects, casting surface deficiencies, and deformation. Provided is a two-layer casting mold that includes: an inner layer that includes an inorganic binder–coated sand that includes a metasilicate or a hydrate of a metasilicate as an inorganic binder; and an outer layer that includes a coated sand selected from the group that consists of resin binder–coated sands and inorganic binder–coated sands.

A coolant composition containing the following substances: a) an alcohol; b) water; c1) a triazole compound; c2) an imidazole compound; d) a phosphate ion; and e) a metasilicate.

The inorganic precoated sand is a dry inorganic precoated sand having a fire-resistant aggregate and an inorganic binder layer covering the surface of the fire-resistant aggregate, the inorganic binder layer contains a metasilicate hydrate and fine particles containing amorphous SiO2, and the inorganic binder constituting the inorganic binder layer has a melt viscosity at 80 DEG C of 32-150 mPa * s (inclusive).

The application discloses a kind of high-efficiency silicon nitride slurry based on light-cured forming and its ceramic low-temperature sintering forming method, comprising, beta phase silicon nitride powder, high-temperature binder, sintering aid is dispersed in ethanol solution by ball milling, ceramic mixed powder is obtained after drying and grinding;Add photo-initiator and oxygen barrier in photosensitive resin, stir uniformly to obtain premix liquid;Ceramic mixed powder and premix liquid are mixed, add dispersing agent, thixotropic agent, stir uniformly and vacuum defoaming to obtain silicon nitride ceramic slurry.The application effectively solves the technical defects of low single-layer curing thickness of traditional silicon nitride ceramic slurry light-cured forming, realizes high-precision, defect-free sample of 50 μm layer thickness printing of single layer, effectively improves the printing efficiency.High-temperature binder aluminum dihydrogen phosphate is introduced at the same time, and the problem of more and larger gaps between powders after debinding is solved by using metasilicate generated by its decomposition to bond silicon nitride particles, so as to realize the preparation of dense silicon nitride ceramics.

The utility model belongs to the technical field of mineral water preparation, and particularly relates to a metasilicic acid mineral water preparation system which comprises a filtering module, a metasilicate adding module and a first water storage container, the metasilicate adding module comprises a first valve, a second valve, a metasilicate dissolving unit, a second water storage container, a concentration sensor and a third valve. According to the preparation system, through precise cooperation of all the modules, for example, the filtering module is flexibly matched according to the condition of raw water, and the raw water is precisely purified to reach the drinking water standard; the metasilicate adding module is combined with a water storage container through multiple valves, and the concentration of a metasilicate solution is ingeniously regulated and controlled; the control module performs real-time monitoring and intelligently controls the opening proportion of the valves and switching of water storage paths, and accurate blending of the solution is guaranteed. The system not only can meet diversified drinking requirements of the market on high-quality metasilicic acid mineral water, but also has efficient and stable production characteristics, and provides a reliable scheme for industrial preparation of the metasilicic acid mineral water.

The invention discloses an environment-friendly phosphorus-free two-in-one oil and wax removal powder formula which is prepared by mixing sodium metasilicate pentahydrate, a surfactant and isopropanol through a physical method, and is suitable for pretreatment of hardware surface treatment, especially for a zinc alloy matrix. According to the formula, oil wax dirt is rapidly removed, a matrix is not corroded after long-term soaking, silicate ions are generated through hydrolysis of sodium metasilicate pentahydrate and react with zinc ions to form a compact and stable zinc silicate or zinc metasilicate passivation film, and oxidation and electrochemical corrosion are delayed. According to the preparation process, powder is formed through weighing, mixing and stirring, a solution is prepared during use, a workpiece is heated and soaked, a passive film provides physical isolation and chemical stability, the electroplating binding rate is ensured, the problems that pinholes, pits and bubbles are likely to be generated in the prior art are solved, the formula is suitable for industrial application, and environmental protection pressure is reduced; and an efficient and environment-friendly solution is provided for hardware surface treatment.

The invention discloses a weak alkaline water preparation device capable of simulating a natural mineralization process, and belongs to the field of weak alkaline water preparation, the weak alkaline water preparation device comprises a mounting rack, a plurality of multi-medium filtering tanks are arranged at the inner bottom of the mounting rack, the tops of the multi-medium filtering tanks are fixedly connected with connecting pipes, one side of the inner bottom of the mounting rack is fixedly connected with a disinfection tank, and the disinfection tank is fixedly connected with a water storage tank. And the other side of the inner bottom of the mounting frame is fixedly connected with a water pump, and a monitoring unit is arranged in the middle of the front side of the mounting frame. Water flow can enter the rotating sleeve through the open groove and then enter the material containing bin through the second water inlet and the first screen frame, the water flow makes full contact with the composite strontium-metasilicic acid filter material in the material containing bin, the composite strontium-metasilicic acid filter material can release strontium, metasilicic acid and other microelements, the mineral water standard is met, and the mineral water quality is improved. The composition promotes elasticity of cartilage and connective tissue, accelerates bone calcification, prevents and treats osteoporosis, and avoids osteoporosis caused by long-term taking of RO.

To provide inorganic coated sand which is excellent in the property of filling to a mold, which enables achievement of a casting mold excellent in strength and which can be manufactured without the need for use of an aqueous solution of an inorganic binder and a step for removal of water, and inorganic coated sand which dispenses with water vapor ventilation in the manufacture of the casting mold.SOLUTION: Dry inorganic coated sand comprises refractory aggregate, and an inorganic binder layer that is formed on a surface of the refractory aggregate. The inorganic binder layer includes a metasilicate hydrate in the dry inorganic coated sand.SELECTED DRAWING: None

This invention provides a geopolymer-type hydraulic composition with excellent fluidity and hardened strength. [Solution] A hydraulic composition containing (A) fine aggregate, (B) metasilicate [hereinafter referred to as component (B)], (C) alumina silica fine powder, (D) bicarbonate [hereinafter referred to as component (D)], and (E) water, wherein the content of component (D) is 0.5 parts by mass or more and 50 parts by mass or less per 100 parts by mass of component (B).