Method of making mixed solid fuel charge |
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IPC classes for russian patent Method of making mixed solid fuel charge (RU 2395479):
Gas-generating composition for producing breathable gas / 2394801
Invention relates to pyrotechnics. The gas-generating composition for producing breathable gas contains silicon as fuel, cellulose nitrate or sodium metasilicate, or magnesium cement as binder, oxidising agent which forms nitrogen in combustion products, in form of nitrates of alkali or alkali-earth metals or their mixture with potassium perchlorate or ammonium perchlorate in ratio which ensures absence of hydrogen chloride in the combustion products.
 Method of making articles from mixed solid rocket fuel / 2394011
Invention relates to technology of making articles from mixed solid rocket fuel. The method of making articles from mixed solid rocket fuel involves moulding articles into a case through pressure moulding of fuel mass on a continuously running installation with auger unloading, holding the moulded articles under pressure during operation of the auger with simultaneous cooling of the fuel mass in the auger by feeding a heat carrier into the housing of the auger, cutting off the fuel mass in the case using a cutter and press curing. Cooling of fuel mass in the auger feeding heat carrier into the housing of the auger begins 3-20 minutes before the end of moulding the article. After ageing of the moulded article, pressure in the case of the article is established in accordance with a mathematical formula by smoothly varying rotational speed of the auger. Further, without changing the rotational speed of the auger, the cutter is closed and after 0.5-1.0 minutes, rotational speed of the auger is smoothly reduced to zero and the auger is switched off. The stroke speed of the piston of the cutter during its closure is preset at a value not greater than 0.15 m/min.
 Solid fuel low-temperature gas-generating composition / 2393140
Invention relates to solid fuel gas-generating compositions. The solid fuel low-temperature gas-generating composition contains ZV ammonium nitrate, guanylurea dinitramide and methylpolyvinyltetrazole.
 Gas-generating fuel for downhole apparatus / 2393139
Invention relates to gas-generating solid fuels. The gas-generating fuel for downhole apparatus contains ammonium perchlorate as an oxidising agent, synthetic hydrocarbon rubber plasticised with hydrocarbon oil as fuel, lecithin, epoxy resin, ortho-tert-butyl-para-cresol or tertiary butylphenol as a processing additive, paradinitrosobenzene or quinol ether as a curing agent, ammonium chloride as a gas-generating additive. The synthetic hydrocarbon rubber used can be isoprene, butadiene, ethylenepropylene, isoprenedivinyl or butyl rubber and the hydrocarbon oil can be transformer, aviation or industrial oil.
Low-temperature solid propellant / 2389714
Invention relates to making gas-generating low-temperature solid propellants. The low-temperature solid propellant contains ammonium nitrate as an oxidising agent, SKDM-80 rubber as polymer fuel, di-N-oxide-1,3-dinitrile-2,4,6-triethylbenzene as a hardener and dinitrophenoxyethanol as a combustion rate catalyst.
Gas generating composition / 2388737
Invention relates to gas generating compositions for use in various mechanisms working under the effect of compressed gases. The gas generating composition contains 50-60 wt % calcium nitrate, 15-16 wt % melamine and 24-35 wt % sodium bicarbonate.
 Manufacturing method of charge from ballistic solid propellant / 2384555
Manufacturing method of charge from ballistic solid propellant (BSP) involves mixing of fuel components containing solid additions in water medium, pressing of fuel mass, rolling, pelletisation of fuel mass, drying of fuel pellet and pressing of charge with a through method. Solid additions are dosed for fuel components to be mixed in the form of pre-prepared water suspension; at that, water suspension of solid additions is prepared at temperature of 15…35°C, and the ratio of solid additions: water within 1:3…1:5 and introduction of sulphoricinate E in quantity of 0.10…0.25 wt % in relation to fuel mass.
Ballistic solid rocket propellant / 2384553
Ballistic solid rocket propellant includes combustion modifying agent which consists of lead copper complex of phthalic acid or nickel lead complex of phthalic acid as combustion catalyst, chrome (III) - copper (II) - oxides or dioxides of titanium, or titanium disilicide, or calcium carbonate as combustion stabiliser, technical carbon and 1,2-dibutoxybenzol. Combustion catalyst is included in the propellant in quantity of 1.5-4.0 wt %, combustion stabilising agent 0.4 - 3.0 wt %, technical carbon 0.1 - 1.0 wt %, 1,2-dibutoxybenzol - 0.5 - 2.0 wt %.
 Method for manufacturing of item from mix solid rocket propellant / 2382017
Method for manufacturing of item from mix rocket solid propellant (MRSP) includes moulding of item, execution of staged hardening of item under pressure by means of coolant temperature variation and item cooling. Item is hardened at initial stage at the temperature of coolant 5-15°C below temperature of the main hardening mode for 10-20% of overall hardening duration, and then in the main mode at the temperature of 60 - 80°C. Cooling is carried out at coolant temperature of 10 - 35°C and duration (τcooling, hr), defined by formula τcooling=0.61 Taverage + 0.65, where Taverage is actual average coolant temperature, °C.
Ballistite type solid rocket propellant / 2380346
Invention relates to ballistite type solid rocket propellant which can be used, for example in anti-tank guided missile systems. Ballistite solid rocket propellant contains nitrocellulose, plasticiser - nitroglycerin, dinitrotoluene and dinitrodiethyleneglycol, chemical resistance stabiliser - centralite or its mixture with diphenylamine, processing additives - industrial oil and zinc stearate, combustion catalyst - mixture of a lead-nickel complex of phthalic acid with calcium carbonate or magnesium oxide.
Method of making articles from mixed solid rocket fuel / 2394011
Invention relates to technology of making articles from mixed solid rocket fuel. The method of making articles from mixed solid rocket fuel involves moulding articles into a case through pressure moulding of fuel mass on a continuously running installation with auger unloading, holding the moulded articles under pressure during operation of the auger with simultaneous cooling of the fuel mass in the auger by feeding a heat carrier into the housing of the auger, cutting off the fuel mass in the case using a cutter and press curing. Cooling of fuel mass in the auger feeding heat carrier into the housing of the auger begins 3-20 minutes before the end of moulding the article. After ageing of the moulded article, pressure in the case of the article is established in accordance with a mathematical formula by smoothly varying rotational speed of the auger. Further, without changing the rotational speed of the auger, the cutter is closed and after 0.5-1.0 minutes, rotational speed of the auger is smoothly reduced to zero and the auger is switched off. The stroke speed of the piston of the cutter during its closure is preset at a value not greater than 0.15 m/min.
 Installation and method of producing industrial explosives / 2393138
Group of inventions relates to industrial explosives. Disclosed is an installation for producing industrial explosives containing a solid granular oxidising agent, solid dispersed additives and liquid additives, and a method of producing industrial explosives using such an installation. The installation for producing industrial explosives has an intermittent drum mixer, a device for loading the oxidising agent, solid dispersed additives and liquid additives into the mixer and a receiving and unloading device for industrial explosives. The device for loading the oxidising agent and solid dispersed additives and the receiving and unloading device for the mixed industrial explosives are made in form of at least one container with a valve in the bottom discharge hole in form of a rotary valve. The drum mixer is placed at constant inclination to the horizontal in the operation cycle with possibility of rotation about its own axis, is made with at least one screw blade on the inner surface and is has a cylindrical bearing with perforated walls and ridges on the outer surface, where the said cylindrical bearing is fitted coaxially with an annular gap relative the mouth of the drum. The installation has apparatus for docking containers with the loading mouth of the mixer drum.
 Hydraulic press / 2393091
Invention relates to material forming and can be used for forming powder-like thermoplastic explosive compositions. Proposed press comprises plate, working cylinder with plunger, working cylinder pressure line, return cylinders, hydraulic unit and program control device. Hydraulic unit comprises motor connected with frequency converter, two hydraulic pumps, variable throttle in working cylinder drain line and analog pressure transducer in working cylinder pressure line. Press incorporates hydraulic lock, electrically-controller hydraulic control valves and press plate top position pickup. Second hydraulic pump pressure line is connected via electrically-controller hydraulic control valve to first inlet of hydraulic lock. Its second inlet is connected with return cylinders working chambers, and its outlet communicates with working cylinder pressure line. Program control device incorporates pressure control unit.
 Device to mix explosive components and make works thereof / 2392259
Proposed device consists of pre-mixer with horizontal rotor and split casing, vacuum mixer comprising mixing chamber with heating jacket and vertical mixers, and forming screw. Device incorporates load bearing column aligned with vacuum mixer vertical drive hydraulic cylinder. Vacuum mixer chamber represents a vertical housing coupled via hydro mechanical clamps with mixers drive and forming screw housing. Vacuum mixer is secured on load bearing column to move vertically and horizontally thereon. Sealing valve and elastic sleeve with collar are arranged in said mixing chamber. Pre-mixer housing has circular groove to receive aforesaid collar.
 Method for manufacturing and assembly of explosive charges / 2391325
Method for manufacturing and assembly of explosive charges relates to methods of explosive substances (ES) treatment and includes pressing of stock from ES by means of force application from the side of one of its ends with further enclosure of stock into tight volume formed with the help of elastic and shape-generating elements and compression in chamber of high pressure. As shape-generating element, charge body is applied, which is manufactured previously and filled with ES arranged in seat portion of bottom, which may be formed as through hole, groove, slots, etc. Prior to installation of ES stock into stock body, it may be assembled with intermediate charge. As stock is placed in body, end of stock, from the side of which the pressing force was applied, is placed on the side of body bottom, and elastic element is put on body or inserted into body from the side of other end of stock, and compression is carried out from the same side.
 Method of making emulsion explosive material and emulsion explosive material made using said method / 2388735
Group of inventions relates to techniques for producing emulsion explosive materials. Proposed is a method of preparing emulsion explosive material in a mixing-loading machine, involving loading into the said machine a inverted emulsion and granulated foamed polystyrene and mechanical mixture of the components. The granulated foamed polystyrene used is polystyrene with 1-5 mm granules and packed density of 30-100 kg/m3, and the inverted emulsion used is at temperature ranging from -30 to +40°C and dynamic viscosity ranging from 30000 to 100000 cP. The emulsion is obtained by mixing 80% aqueous ammonium nitrate solution at 65 - 75°C with a fuel mixture at 40 - 50°C, containing mineral oil and a mixed emulsifying agent, with subsequent cooling. The mixed emulsifying agent contains polyisobutene succinimide anhydride and a product of reacting distilled tall oil and sorbitol. Also proposed is emulsion explosive material obtained using the said method.
 Installation for group pressing / 2387624
Installation comprises hydraulic press, on fixed plate of which there are the following components fixed - reinforced chamber and rigid support for transfer of press force to puncheons of dies. Reinforced chamber is equipped with split bottom in the form of carriage installed on technological plate of press movable table. Carriage is equipped with drive and cassette with separate cells for dies. Outer longitudinal walls of cells are arranged as perforated. Transverse walls are arranged in the form of limiters of press movable table stroke. Mentioned limiters interact with rigid support. Cells are pairwise covered by detachable covers with holes for puncheons of dies.
Method of preparing pellet powder / 2386607
Invention relates to preparation of pellet powder for small-arms weapons and small-calibre artillery. The method of preparing pellet powder involves preparation of powdered lacquer by mixing pyroxylin or its mixture with recyclable production wastes and ethylacetate in an aqueous medium, dispersing the powdered lacquer onto spherical particles, addition of 0.1-0.3 pts. wt pellet powder of the same composition with particle size of 0.2-0.8 mm per 1 pts. wt pyroxylin or its mixture with recyclable production wastes, stirring for 20-40 minutes, addition of a dehydrating agent, removal of ethylacetate, washing the powder, fractionation, graphitation and drying.
Method of making explosive substance / 2385854
Invention relates to safe methods of making water-resistant granulated industrial explosive substances. The method of making explosive substance involves mechanical mixture of granulated ammonium nitrate with diesel fuel, addition into the obtained mixture of ammonium nitrate powder in volume 5-10% less than the volume of inter-grain spacing or a mixture consisting of 79 wt % ammonium nitrate powder or 21 wt % trinitrotoluene, or a mixture consisting of 94 wt % ammonium nitrate powder and 6 wt % aluminium or magnesium, or ferrosilicon. The granulated ammonium nitrate, ammonium nitrate powder and diesel fuel are taken in stoichiometric ratio.
 Installation for mixing of explosive components / 2385853
Invention relates to the field of solid rocket propellant charges (STRT), namely to technology of explosives preparation, which contain oxidants liable to agglomeration. Installation for mixing of explosive components comprises upper and lower mixers with augers and device for control of explosive flow between mixers. Device for control of flow has outer body and inner body with fixed elastic membrane, with transverse partition in the middle, on both sides of which on cylindrical shell of body there are through holes arranged. Transverse partition of inner body on both sides is equipped with cone inserts. One cone insert is installed with top to the side of upper mixer auger, and the second cone insert - with its top to the side of working cavity of lower mixer. Through holes on shell of inner body are arranged in the form of slots, side walls of which are arranged along generatrices of cylindrical shell, and end walls of slots are slanted towards transverse partition.
Method of phlegmatization of blasting powder / 2244699
The invention is dealt with the field of production of blasting powder. The invention offers a method of phlegmatization of blasting powder, in particular, fine-grained pyroxylin blasting powder, spherical blasting powder, obsolete fine-grained pyroxylin blasting powder or obsolete spherical blasting powder. The method of phlegmatization of blasting powder provides for a treatment of the blasting powder by a phlegmatizator in a water medium. For that purpose a reactor is filled up with water, then they load blasting powder, heat up and exercise a one-shot introduction of a phlegmatizating agent made in the form of a water emulsion. In the capacity of the phlegmatizating agent is used dibutyl phthalate or a mix of diphenylamine and dinitrotoluene, or a mix of centralite №1 and dinitrotoluene, or a mix of centralite №2 and dibutyl phthalate. The invention allows to utilize the obsolete blasting powders, to increase safety of process of phlegmatization of the blasting powders, to reduce durations of the process of phlegmatization of the blasting powders, to improve ballistic performances of produced blasting powders.
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FIELD: chemistry. SUBSTANCE: invention relates to technology of making charges from mixed solid fuel. The method of making a mixed solid fuel charge involves grinding, fractionation and mixing different fractions of an oxidising agent, preparation of a mixture of binder with metallic fuel and additives, preparation of a mixture of hardener components and preparation of a fuel mixture, moulding, polymerisation, pressing and flaw detection of the charge. At the step for preparing a mixture of binder with metallic fuel and additives, rubber - oligomer polyvinyl isoprene urethane with terminal epoxy groups is divided into two portions. One portion of the rubber and a polymer chain extension - aniline is used to prepare a semi-finished product and is mixed with the second portion of the rubber and components of the mixture of binder with additives. EFFECT: invention lowers viscosity and increases spreading coefficient of the fuel mixture in order to provide quality filling of charges, and also improves strength properties of the fuel. 1 tbl
The invention relates to the manufacture of charges from mixed solid fuel (CTT), suitable for operation in a wide temperature range (minus 54 - plus 74°C). Charge CTT is a molded or poured into the motor housing, the required form of the block (usually with the internal channel) STT representing heterogeneous utverzhdennuyu mixture of oxidizer (60-80%), a polymeric binder (13-25%), metal fuel (5-20%) and various additives (5%): a catalytic, technological and other A known method of manufacturing charges CTT (Grigoriev A.I. Solid rocket fuel. M.: Chemistry, 1969, pp.96-98), which includes the following basic stages: - grinding oxidizer and metallic fuel; - cooking fuel and binder in the form of a liquid-viscous system; - mix all ingredients in mixer with subsequent degassing of the fuel mass; - preparation of enclosures with the application of a protective and secure (book) composition, installing, forming a channel snap-coated with anti-adhesive coating; - molding (casting) charge; - polymerization; - espressivo (removing the forming channel snap); - radiography. There is also known a method, selected as a prototype (patent RF №2230052, IPC C06B 21/00, C06D 5/06, Appl. 27.06.2002, publ. 10.06.2004). The main drawbacks is to declared in the prototype of the method of manufacturing a charge is to reduce the viscosity due to the small fraction with mass-average particle size of the interval of 0.5-15 μm is necessary before making charges to measure "free volume" of the mixture of dispersed fuel components. In addition, in the conditions of production charges CTT, using this approach it is difficult to ensure reproducibility of particle size distribution of the dispersed fuel components. The technical purpose of this invention is to decrease the viscosity and increase the spreading coefficient of the fuel mass to provide high-quality filling charges, as well as improving the strength properties of STT by increasing the elastic modulus in compression. The technical result is achieved by a method for manufacturing a charge of mixed solid fuel, including grinding, fractionation and mixing different fractions of the oxidant, the mixture of the binder with metal fuel and additives, the preparation of a mixture of components hardener and cooking fuel mass, molding, polymerization, repressive and inspection charge, and at the stage of preparation of the mixture of the binder with metal fuel and additives, rubber - oligomeric polydivinylbenzene with terminal epoxy groups, divided into two parts, one part rubber and extension of polim the nuclear biological chemical (NBC chain - aniline, prepare cake mix at a ratio of 0.45 mol: 0.1 to 0.6 mol, respectively, for 3-4 hours at a temperature of 80°C and mix it with the second part of the rubber components and binder mixture with additives. Next usual dose of powder fillers CTT with stirring after each download. In the last turn into the mixer download the prepared mixture of hardeners and additives. Final mixing of all components STT produce under vacuum to remove gaseous impurities from the fuel mass. The invention consists in that in the preparation of a semifinished product of the number of reactive groups in the rubber is reduced by about half, so when you add the other liquid components of the binder decreases the viscosity and increases the spreading coefficient of the system. The increase in the elastic modulus in compression of the cured fuel is because it increases the density of the chemical grid of the polymer due to the remaining parts of rubber, which is added after receiving the linear elastomer and is used for cross-linkage of its macromolecules. For example, as rubber may be taken - oligomeric polydivinylbenzene with terminal epoxy groups, and the extension of the polymer chain aniline. The molar ratio between the couch is kOhm and the aniline is (0.45 mol):(0.1 to 0.6 mol), respectively. At the same time, preparation of semi-finished product at a temperature of 80°C for 3-4 hours. The mole fraction of rubber in the composition STT is 0.9 mol. The table shows an example implementation of the invention and the data on viscosity, the spreading coefficient and the modulus of elasticity under compression.
The table shows that the sample preparation CTT claimed in the invention method allows to reduce the viscosity of the fuel mass in comparison with the prototype, to increase the value of the spreading coefficient of the fuel mass and modulus of elasticity under compression of the sample polymerized STT. Thus, applying the claimed method, this is an opportunity to improve the rheological properties of the fuel mass in the manufacture of STT charges, thereby increasing their quality. The proposed technology can be used for the manufacture of charges based on CTT. Thus, the claimed method includes the following stages: 1) preparation of an oxidant, comprising drying, grinding, fractionation and mixing is a certain ratio of the fractions; 2) preparation of a semifinished product from a mixture of parts of rubber with extension of the polymer chain in the stoichiometric ratio; 3) preparation of a mixture of the obtained semi-finished product with components binders with additives and metal fuel; 4) preparation of a mixture of components hardener; 5) preparation of engine cases, including drawing on its inner wall protective and securing the structure and installation of the forming channel tooling, coated with a release coating; 6) preparation of the fuel mass, which includes operations batching, mixing all the components in a mixer, followed by degassing; 7) forming (fill in the motor housing) and polymerization; 9) espressivo (extraction tooling for forming channels and charge) and radiography. These advantages are confirmed by the manufacturer according to the described method prototypes in terms of the FSUE "December" A method of manufacturing a charge of mixed solid fuel, including grinding, fractionation and mixing different fractions of the oxidant, the mixture of the binder with metal fuel and additives, the preparation of a mixture of components hardener and cooking fuel mass, molding, polymerization, repressive and defect charge, featuring the the action scene, that at the stage of preparation of the mixture of the binder with metal fuel and additives rubber - oligomeric polydivinylbenzene with terminal epoxy groups are divided into two parts, one part rubber and extender polymer chain - aniline is prepared semi-finished product in a ratio of 0.45:0.1 to 0.6 mol, respectively, and mix it with the second part of the rubber components and binder mixture with additives, and the cooking time of the semi-finished product is 3-4 hours at a temperature of 80°C.
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