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3954 results about "Asbestos" patented technology

Asbestos (pronounced: /æsˈbɛstəs/ or /æsˈbɛstɒs/) is a term used to refer to six naturally occurring silicate minerals. All are composed of long and thin fibrous crystals, each fiber being composed of many microscopic 'fibrils' that can be released into the atmosphere by abrasion and other processes. Asbestos is a well known health hazard, and use of it as a building material is now banned in many countries. Inhalation of the fibres can lead to various lung conditions, including asbestosis and cancer.

Aqueous slurry material containing silicon dioxide aerosol, preparation method and application thereof

The invention discloses an aqueous slurry material containing silicon dioxide aerosol, a preparation method and an application thereof. The aqueous slurry material is a stable dispersion system formed by uniformly mixing silicon dioxide aerosol powder, a surfactant, a bonding agent and water. The preparation method includes following steps: mixing water with the surfactant uniformly, adding the aerosol powder and mixing the mixture uniformly to obtain a suspension liquid, and adding the bonding agent and adding or not adding an additive, and uniformly mixing the mixture to obtain the aqueous slurry material. The aqueous slurry material is free of asbestos and other harmful fiber materials, is convenient to transport and construct, is free of cutting and can be easily controlled in thickness of a produced heat-insulating material, can be used through an optimized construction scheme freely, is simple in preparation process and low in cost, and is suitable for large-scale industrial production. The aqueous slurry material can be used for coating the surface of a base material and can form a coating after drying, which is flat in surface, is excellent in heat-insulating performance and is strong in bonding force, and also can be mixed with other structural materials to prepare an aqueous composite material.
Owner:苏州同玄新材料有限公司

Methods of vitrifying waste with low melting high lithia glass compositions

The invention relates to methods of vitrifying waste and for lowering the melting point of glass forming systems by including lithia formers in the glass forming composition in significant amounts, typically from about 0.16 wt % to about 11 wt %, based on the total glass forming oxides. The lithia is typically included as a replacement for alkali oxide glass formers that would normally be present in a particular glass forming system. Replacement can occur on a mole percent or weight percent basis, and typically results in a composition wherein lithia forms about 10 wt % to about 100 wt % of the alkali oxide glass formers present in the composition. The present invention also relates to the high lithia glass compositions formed by these methods. The invention is useful for stabilization of numerous types of waste materials, including aqueous waste streams, sludge solids, mixtures of aqueous supernate and sludge solids, combinations of spent filter aids from waste water treatment and waste sludges, supernate alone, incinerator ash, incinerator offgas blowdown, or combinations thereof, geological mine tailings and sludges, asbestos, inorganic filter media, cement waste forms in need of remediation, spent or partially spent ion exchange resins or zeolites, contaminated soils, lead paint, etc. The decrease in melting point achieved by the present invention desirably prevents volatilization of hazardous or radioactive species during vitrification.
Owner:SAVANNAH RIVER NUCLEAR SOLUTIONS

Magnesium-alloy metal-type casting coating and preparation method thereof

The invention relates to a magnesium-alloy metal-type casting coating and a preparation method thereof. Magnesia and forsterite are used as refractory aggregates; titania, asbestos powder or talcum powder or diatomite, and the like are added as heat-insulation aggregates; a mixed caking agent with favorable high-temperature caking property and a compound suspending agent are selected; and boric acid is added as a flame retardant. The preparation method comprises the following steps: mixing the magnesia, the forsterite, the titania, and the asbestos powder or talcum powder or diatomite, and preparing A after ball milling; mixing the caking agent and bentonite, and adding water to activate so as to obtain B; mixing the boric acid, sodium carboxymethyl cellulose and polyacrylamide, and addingwater to activate so as to obtain C; and finally, mixing A, B and C, and carrying out ball milling or colloid milling for more than 30 minutes to obtain the magnesium-alloy metal-type casting coating. The coating has the advantages of favorable heat insulation, caking property, coating property, flame retardance, stability and durability, is beneficial to continuous production and convenient forobtaining magnesium-alloy metal-type castings with favorable surface quality and superior performance, and prolongs the service life of moulds.
Owner:SHANGHAI JIAO TONG UNIV

Vehicle tail gas purifying device

The invention discloses a vehicle tail gas purifying device. The vehicle tail gas purifying device comprises a main body; a temperature difference generator, an asbestos filter cylinder and an activated carbon filter screen are mounted in an inner cavity of the main body in sequence from left to right in a tail gas feeding direction; a relative fixed base is arranged between the temperature difference generator and the asbestos filter cylinder; an electrostatic dust removing anode plate and an electrostatic dust removing cathode plate are respectively mounted on the relative fixed base; a turbulent fan is fixedly mounted on the inner wall of the temperature difference generator through a fixed frame; heat collecting plates are respectively arranged on the inner walls of two opposite sides of the temperature difference generator; an equipment box is fixedly welded in the middle position of the outer side of the top of the main body; a transformer and a protection switch are fixedly mounted in an inner cavity of the equipment box; and the temperature difference generator is connected with an accumulator through an intelligent charger. The vehicle tail gas purifying device is skillful in concept, uses vehicle tail gas afterheat for generating electricity, fully uses resources, can purify and decompose vehicle tail gas, and reduces environmental pollution by the vehicle tail gas.
Owner:NANJING HANERSI BIOLOGY TECHNOLOGY CO LTD

Technology for repairing surfacing of piston rod of super large marine diesel engine

The invention discloses a technology for repairing surfacing of a piston rod of a super large marine diesel engine, and the technology can carry out the deep repair of the surface of the piston rod. The adopted surfacing process is as follows: flaw detection and straightening are carried out on the piston rod, turning machining is carried out on the surface of the piston rod to remove a defect layer, and individual deeper cracks are manually removed by grinding; fire whirl is used for heating the piston rod twice, the first heating is carried out till 200 DEG C-250 DEG C, the heating is stopped, the race rotation is carried out for 30 minutes, the second heating is further carried out after the temperature difference between the interior and the exterior is reduced, and a surfacing machine tool is rotated after reaching 250 DEG C-300 DEG C; submerged arc welding is used for rotating dual heads of the surfacing machine tool and a 2Cr13 flux-cored welding wire for carrying out the simultaneous surfacing, and asbestos cloth is used for wrapping and keeping the temperature during the welding process; the piston rod wrapped by the asbestos cloth for slow cooling after the surfacing achieves the size requirement, when the temperature is decreased to be lower than 100 DEG C, the piston rod wrapped by the asbestos cloth is vertically placed till the temperature is decreased to the room temperature, and then the temperature-keeping cloth is removed. The surface of the piston rod after the repair by employing the method has no weld defects, the piston rod fully meets the performance requirements, and the cost is only about one fifth of the cost for fabricating a new piston rod.
Owner:DALIAN XINZHONG GRP +1

Method for ecologically breeding black-bone chickens in medlar garden

The invention relates to a method for ecologically breeding black-bone chickens in a medlar garden, comprising the following steps: 1. medlar garden construction: the growth of garden nursery stocks takes more than one year, strong stocks have no pest infection, row spacings of planted plants are 1 m*2 m, 333 plants are planted in per mu, forage grass or/and vegetables, i.e. lucernes, small rapes, small Chinese cabbage, and the like are interplanted among rows of medlar plants, a net-shaped iron-wire protective guard with the height of 1.5 m is constructed around the medlar garden, and movable water tanks and forage tanks are placed in the medlar garden; 2. simple chicken house construction: a finished chicken house is in a steel bar pipe frame and asbestos tile structure, a roof structure is in a monoclinic way, the height of circumferential asbestos tiles is 1.5 meters, the upper part of the chicken house is provided with a steel plate net, and the chicken house is internally provided with the forage tanks and drinking bowls in a matching way; 3. brooding, grazing and manual forage supplement: chicks are collected to be brooded for 4-5 weeks and then bred in the medlar garden for 8-10 weeks without original temperature, and two batches of the black-bone chickens are grazed and bred every year; 4. breeding density: the number of each batch of the black-bone chickens which are averagely bred on the earth per mu is properly controlled between 100 and 150; and 5. a breeding way: an all-in and all-out breeding way is carried out for the same batch of the black-bone chickens.
Owner:GANSU AGRI & FORESTRY RES INSTOF MOUNTAIN GROUP
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