189results about How to "Good explosive performance" patented technology

The invention discloses a production method of an emulsified explosive, which comprises the following steps that: water phase and oil phase are prepared, and then water phase solution is added into oil phase solution to be emulsified by an emulsifier to prepare a latex matrix, and simultaneously a cooling steel strip controls the temperature of the latex matrix to be 90 to 105DEG C; and the matrix is cooled, the cooled latex matrix is added into a sensitizing machine, and then one or two of perlite and chemical blowing agent is added in for sensitization; and then the explosive is charged, and finally the loaded explosive is packaged to prepare the emulsified explosive. The production method of the emulsified explosive has the advantages of reducing the production cost, having no waste explosive, waste material, waste gas, waste water and dust in production, realizing the free switching of a plurality of sensitization methods, such as physical sensitization, chemical sensitization and physical and chemical composite sensitization, so as to meet the needs of different consumers; perlite is adopted for physical sensitization, and can improve the explosion performance and the storage performance; and the production method of the emulsified explosive can adapt to the requirements of small-diameter explosive charging and full-automatic packaging automatic calandria.

A puffed ammonium nitrate explosive with low exploding speed is prepared from ammonium nitrate, surfactant, composite oil, wood powder, and diluent through dissolving ammonium nitrate and surfactant in water, vacuum drying at 110-140 deg.C and -0.085--0.098 MPa vacuity for 5-20 min, mixing with others and cooling. Its advantages are high safety and performance, uniform explosion transmission and low cost.

The invention relates to a high-temperature acceleratingly-hardened emulsion explosive, which comprises water-phase materials, oil-phase materials, emulsifier, sensitizer and hardening accelerator, wherein the water-phase materials include wax and/or fatty acid; the sensitizer includes physical sensitizer and chemical sensitizer simultaneously; and the hardening accelerator is selected from silicate and/or alkaline matter. The temperature of the emulsion explosive is higher than 35 DEG C, and the emulsion explosive has a certain hardness and is non-sticky, thereby being applicable to open-air filling operation in hot summer, and being high in explosion performance.

A rockburst-preventive tunnel face structure comprises tunnel faces used for blasting and excavating operations during tunneling. The improvement of the rockburst-preventive tunnel face includes that the surface of each tunnel face is in the shape of a sphere or a special-shaped face formed by intersection of an ellipsoid and a ground surface. The rockburst-preventive tunnel face has the advantages that occurrence probability of rockburst disasters can be effectively reduced, and capability of resisting the rockburst disasters can be effectively improved; meanwhile, the areas of effective free faces formed by the tunnel faces are large, so that exploding effects can be improved, disturbance damage to surrounding rocks can be reduced, and construction efficiency can be improved.

The invention relates to a water resistance vegetable composite oil phase which comprises the following components in percent by mass: 5-30 percent of hydrogenated vegetable fatty acid, 5-20 percent of vegetable wax, 20-50 percent of vegetable oil foot, 5-20 percent of vegetable oil and fat, 20-50 percent of decompressed cerate and 0.5-3 percent of surfactant. The water resistance vegetable composite oil phase is prepared by adopting the following steps of: firstly, heating various components in a single melting tank to the temperature of 75-85 DEG C and melting; and sequentially pumping the components into a reaction kettle through an oil pump according to the proportion requirement after weighted through an electronic scale, stirring, raising the temperature to 105-110 DEG C, starting a vacuum pump for dewatering, filtering, forming and packaging. The invention overcomes the defect of water resistance of the modified ammonium nitrate fuel oil explosive and extruded explosives, and provides a high-quality and low-cost water resistance vegetable composite oil phase used for the modified ammonium nitrate fuel oil explosive and extruded explosives; and the explosives produced by using the composite oil phase have excellent water resistance, and especially the extruded explosives really have excellent water resistance.

The invention relates to an ester emulsifying agent used for an industrial emulsion explosive and a preparation method thereof. The ester emulsifying agent comprises an oily group component, a linking group component, a polar group component and a base oil component, the mol ratio proportion of the oily group component to the linking group component to the polar group component is 1:1-2:1-4, the oily group component, the linking group component and the polar group component react to generate polyolefine acid ester, then the polyolefine acid ester is diluted by using the base oil component, and the weight proportion of the polyolefine acid ester to the base oil component at the time of dilution is 1:0.8-1.2. The preparation method comprises the following steps that: in an alkylation process, the oily group component is put into a reactor and is heated, then the linking group component is put into the reactor, the temperature is kept, the mixture is stirred for 0.5-1 hour, the temperature is raised to 200-240 DEG C, and a reaction is carried out for 2-5 hours; and in an esterification process, the polar group component is added into polyolefine carboxylic acid or polyolefine carboxylic acid anhydride obtained by the reaction, the mixture is heated when being stirred, the reaction time lasts for 7-16 hours, the base oil component is added for dilution, and a product of the ester type emulsifying agent is obtained by filtration.

The invention relates to the field of explosives, in particular to a low-pressure formed explosive and solves the technical problems that the explosive is formed by pressing under large pressure in the explosive pressing process due to the high softening point of the explosive used in an oil gas well at present, and the compaction density of the pressed explosive is low due to low uniformity of particle sizes. The low-pressure formed explosive is prepared by the following steps of: a) putting water in a container, putting cyclonite in water, and stirring to prepare suspension; b) adding an adhesion agent and plasticizer into the suspension, uniformly stirring, adding a sufficient amount of a demulsifying agent, and uniformly stirring; c) heating the obtained mixture to 55 to 60 DEG C, and adding ethyl acetate and pelletizing; and d) when the particle size of white particles reaches 8 to 50 meshes, stopping adding ethyl acetate. The pressure required during explosive pressing is reduced obviously, the safety in the explosive pressing and loading processes is guarantee, and the compaction density of the explosive in the explosive pressing process can be improved simultaneously.

The preparation process of high density bulked ammonium nitrate explosive includes the following steps: 1. adding water in 8-10 wt% into ammonium nitrate in 70-75 wt%, heating to 100-115deg.c, adding surfactant in 0.15 wt%, heating to 120-130deg.c, crystallizing at vacuum degree of -0.088 to -0.092 MPa and discharging puffed ammonium nitrate at 90-100deg.c; and 2. mixing the puffed ammonium nitrate with fine un-puffed ammonium nitrate powder in 18-23 wt%, oil phase in 3-5 wt% and wood powder in 3-5 wt% for 10-20 min, and discharging at 55-65deg.c. The present invention can raise the density of bulked ammonium nitrate explosive to 0.97-1.02g/cu cm, reaching that of AN-TNT explosive, and has raised volume power, explosive performance superior to AN-TNT explosive, simple technological process and convenient operation.

The present invention discloses a negative-pressure, static and continual manufacturing method for a modified ammonium oil detonator. The steps include: (1) each raw material is matched according to the weight ratio: 80-92 percent of oxidant, 3-12 percent of water, 4-10 percent of ignitable composite cere; (2) the oxidant and the water are mixed in 100-140 DEG C to resolute into a hydrofacies material. (3) The composite cere is melted into an oil phase material in 90-120 DEG C; (4) The oil phase material and the hydrofacies material are mixed to become even suspending liquid after being mixed in the static mixing device; the mixing temperature is 95-140 DEG C; (5) the suspending liquid obtained in step (4) is pumped into a vacuum milling device and then is to milled into powder after being dehydrated in vacuum state; the vacuum drying pressure is 0.01-0.03 MPa; the temperature in the milling device is 60-100 DEG C. The blasting performance of the modified ammonium oil detonator prepared by the present invention is much better without agglomeration; besides, the present invention is with safe production and low cost. The energy consumption can be decreased 20 percent.

The invention relates to a blasting explosive for explosive welding of metal composite materials and a method for manufacturing the same. The mass compositions of the blasting explosive comprise 43 to 75 percent of expanded ammonium nitrate, 15 to 50 percent of crushed ammonium nitrates, 1.5 to 3.5 percent of compound oil phase, 1.5 to 3.5 percent of wood powder, and 2 to 6.0 percent of expanded perlite. The method comprises the following steps: firstly, performing expansion treatment on part of the ammonium nitrate to obtain the expanded ammonium nitrate, and then crushing other ammonium nitrates, and filtering other ammonium nitrates through a sieve of 40 meshes; secondly, mixing the expanded ammonium nitrate and the crushed ammonium nitrates with the compound oil phase, the wood powder and the expanded perlite in a wheel mill; and finally, taking out the materials from the wheel mill at a temperature 40 DEG C below and packaging the materials. The blasting explosive does not contain TNT which is toxic to human bodies, and has the advantages of stable explosive performance, low cost, simple manufacturing method, and applicability to industrial production; besides, the bonding rate and the bonding strength of interfaces of large-area metal composite materials between stainless steel and steel, nickel and steel and the like which are welded through explosive welding by using the blasting explosive.

The invention discloses an improved type porous granular ammonium nitrate fuel oil explosive and a preparing method thereof. The improved type porous granular ammonium nitrate fuel oil explosive is prepared by mixing the following three raw materials in percentage by weight: 93%-95% of porous granular ammonium nitrate, 2.5%-5.0% of light diesel oil and 1.5%-4.0% of bamboo charcoal powder. The preparing method comprises the following steps of adding the porous granular ammonium nitrate to a dispersator according to quantity, then slowly adding sufficient light diesel oil, sufficiently stirring for 5 minutes, and then stopping stirring; standing for 5 minutes, starting the dispersator again, slowly adding the residual bamboo charcoal powder, continuously stirring till color and luster are uniform, wherein the black bamboo charcoal powder is uniformly absorbed on the surface of the porous granular ammonium nitrate; finally filling and sealing to obtain the finished improved type porous granular ammonium nitrate fuel oil explosive product which has the advantages of uniform stirring, excellent property, low moisture absorption and agglomeration ratio, stability in storage, safety, environmental protection, energy conservation, low consumption and low cost.

A blower motor of the present invention comprises a housing, a motor shaft supported in a bearing which is supported in the housing, a rotor which is fixed to the motor shaft and tapers off toward an air inlet, a stator which is fixed to the housing and tapers off toward the air inlet, and a magnet fixed to an internal circumferential surface of the rotor.

The invention belongs to the field of preparation of an energetic material and particularly relates to an active microfluidic platform-based CL-20 crystal form control method. An active microfluidic platform comprises an oscillatory flow driving unit, a steady flow driving unit, a recrystallization unit and a sample collecting unit. The method particularly comprises the following steps: putting anonsolvent solution into a sealing tank and putting a solvent solution into the steady flow driving unit; setting recrystallization temperature and pressure value and enabling the nonsolvent to flow towards a micro-mixer; setting parameters of the steady flow driving unit and enabling the solvent solution to flow towards the micro-mixer; collecting turbid liquid flowing out of the micro-mixer intothe sample collecting unit, and performing washing, suction filtration and drying to obtain CL-20 explosive particles; and changing experiment conditions and repeating the above steps until obtainingCL-20 explosives with different crystal appearance. The CL-20 explosive is prepared by the microfluidic platform, the structure is simple and small-dosage preparation can be realized; and furthermore, the experiment conditions are easy to adjust and the method is suitable for optimizing and screening the experiment parameters in the control process of the CL-20 explosive crystal form.

The invention discloses a plant type liquid composite oil phase. The oil phase comprises the following components in percentage by mass: 5 to 30 percent of stearic acid, 20 to 60 percent of plant oil extract, 20 to 60 percent of plant oil and 0 to 3 percent of surfactant; and a preparation process comprises the following steps of: heating each component in an independent heating groove to 70 to 80 DEG C; pumping the components into a reaction kettle by an oil pump in turn after metering the components by an electronic scale according to the matching requirement of the mass fraction; and stirring, filtering and filling. The dependency of the composite oil phase on petroleum products is completely got rid of, low carbon and environmental protection are ensured, and good explosion performance of explosive is kept; and the composite oil phase has a simple and reliable manufacturing process, and good economic benefit and social benefit and is suitable for industrial production and application.

The invention discloses a detonator which is specially used for explosive welding and has a cladding layer made of copper, copper alloy, aluminum, aluminum alloy, titanium, titanium alloy and other noble metal composite materials and a manufacturing method thereof. The detonator comprises the following compositions in mass portion: 64 to 75 percent of ammonium nitrate, 2 to 3.5 percent of composite oil phase, 2.5 to 3.5 percent of wood powder, 15 to 30 percent of salt and 1.5 to 3.0 percent of hollow glass microsphere. Firstly, the ammonium nitrate is subjected to swelling treatment; secondly, swelled ammonium nitrate in a wheel mill is mixed with the composite oil phase, the wood powder, the salt and the hollow glass microsphere; and finally, a material is discharged at the temperature of 40 DEG C below zero to obtain the product. The detonator does not contain a composition of TNT, stable explosive performance, low cost for the raw materials and simple manufacturing method, and is suitable for industrialized production; and an interface of the noble metal composite material for explosive welding has high bonding rate and bonding strength.

The invention belongs to titanium sponge powder-containing high-strength modified ammonium nitrate fuel oil explosive used in engineering blasting and a method for making the same. The ammonium nitrate fuel oil explosive is powdery explosive consisting of powdery ammonium nitrate, wood flour, modified addition agent, a compound oil phase material and titanium sponge powder. The high-strength modified ammonium nitrate fuel oil explosive does not contain high explosives such as TNT, and contains titanium sponge powder; moreover, the explosive has a simple manufacturing method and better explosion properties than ammonium nitrate fuel oil explosive.

The invention discloses a solid-state emulsion explosive seismic source grain and a preparation method thereof. The preparation method comprises the steps of: heating a mixture composed of an oxidizing agent, a crystal form modifying agent and water for dissolving to form an oxidizing agent solution; heating a mixture composed of compound wax and an emulsifying agent for melting to form a combustible solution; adding the oxidizing agent solution into the combustible solution, and stirring to form a water-in-oil type mixture; adding a density modifying agent in the water-in-oil type mixture and stirring to obtain main charge of the solid-state emulsion explosive seismic source grain; and filling the obtained main charge in a charge shell of the grain with required specifications, pressing into a detonator base with an explosive-initiating grain, and sealing with a sealant to obtain the solid-state emulsion explosive seismic source grain. The solid-state emulsion explosive seismic source grain prepared by the preparation method disclosed by the invention has excellent explosive property.

The invention discloses a preparation method of a powdery emulsion explosive oil phase material. The oil phase material comprises 10-40% of petroleum wax, 50-85% of vacuum cerate, 0-20% of foots oil and 0-5% of a polymer. According to the weight of the oil phase, 0.1-1.0% of a catalyst is added to the oil phase; under a temperature of 130-180 DEG C, oxygen-containing gas is delivered into the oil phase, and the mixture is subject to a reaction for 2-10 hours; according to the weight of the oil phase, 0.1-5% of phosphatide is added to the oxidation product, such that the powdery emulsion explosive oil phase material is finally prepared. According to the invention, when the oil phase material is used for preparing the powdery emulsion explosive, the dosage of an emulsifying agent can be reduced to 1.0%, and the stability of the powdery emulsion explosive can be further improved.

The invention relates to a method for preparing an emulsion explosive by high-temperature sensitization. The method comprises the following steps: preparing a water phase, preparing an oil phase, emulsifying, sensitizing, charging and cooling. The emulsion explosive comprises the following raw materials: ammonium nitrate, sodium nitrate, urea, water, a composite oil phase, an emulsifier, a foamer and an accelerant, wherein the accelerant is a potassium biphthalate buffer solution with the pH value of 5.5, a potassium dihydrogen phosphate buffer solution with the pH value of 4.5, a potassium tartrate buffer solution with the pH value of 3.5 or a potassium tetroxalate buffer solution with the pH value of 1.0; the sensitizing process comprises the following sub-steps: uniformly mixing the accelerant with the foamer to obtain a mixture, adding the mixture into a latex matrix with the temperature of 85-110 DEG C, uniformly mixing, and sensitizing for 0.5-10 minutes. According to the method, the raw material-accelerant is wide in source, low in cost and nontoxic, and the pH value of the explosive is increased, and the explosive performance can be improved; the sensitizing process is simple, quick and free of aftereffect, the production process is simplified, the cost is reduced, and the energy consumption is reduced.

The invention discloses an oil-in-water powdery emulsion explosive, which contains the following components in percentage by mass: 84 to 95 percent of ammonium nitrate, 0 to 11.5 percent of flame inhibitor, 4 to 6 percent of organic oil-phase material, 0.01 to 0.5 percent of emulsifier and 0.1 to 0.5 percent of water, wherein the ammonium nitrate, the flame inhibitor, the emulsifier and the water form oxidant aqueous-phase solution, and the organic oil-phase material forms combustible oil-phase solution. The invention also discloses a preparation method and application of the explosive. The preparation method comprises: heating and dissolving a mixture consisting of the ammonium nitrate, the flame inhibitor, the emulsifier and the water and raising temperature to form the oxidant aqueous-phase solution; heating and melting the organic oil-phase material and raising temperature to form oil-phase combustible agent solution; adding the oil-phase combustible agent solution to the stirred oxidant aqueous-phase solution; emulsifying the obtained product into oil-in-water latex and then preparing the obtained product into the oil-in-water powdery emulsion explosive through negative-pressure drying; and loading the obtained explosive cooled by cold air. The explosive has the advantages of excellent performance, low moisture content, simple preparation method, high yield and good market prospects.

The invention discloses a preparation method of mild sensitization in an emulsion explosive. The inventive preparation method comprises pre-cooling the colloid emulsified from the emulsion explosive to 60 to 70 degrees centigrade, then under the aforementioned temperature, implementing chemical or complex sensitization, and directly loading the explosive to stock. As the mild sensitization is adopted, the power of the explosive is further enhanced, the bubble quality is improved, the explosive property is improved, the cost is reduced, and the explosive storage quantity in the factory is reduced. The inventive manufacturing method is characterized by simple technical, safe manufacturing process, qualified product property, stability and reliability.

The invention discloses a colloidal emulsion explosive for high detonation velocity deep water blasting, which comprises the following components: main oxidant, auxiliary oxidant, reducing agent, water, additive, emulsifier, sensitizer, density regulator, crystal shape modifier, Stabilizer, foaming agent, sensitization aid, flame suppressant, adhesive, the explosive has high detonation velocity, good detonation performance, high safety, low production cost, no poison and no pollution.

The invention discloses a viscous explosive without a single-compound explosive and a preparation method of the viscous explosive. The viscous explosive is prepared by mixing porous granular ammonium nitrate, expanded ammonium nitrate, light diesel oil and adhesives according to a certain proportion, wherein the expanded ammonium nitrate is prepared by mixing a water phase and an oil phase according to a certain proportion through vacuum drying, the water phase of the expanded ammonium nitrate comprises ammonium nitrate, sodium nitrate, a dispersing agent and water, and the oil phase comprises a solid composite oil phase and a liquid composite oil phase. The viscous explosive prepared by the method has the advantages that the viscous explosive has a certain fluxion property, certain cohesiveness and excellent explosion performance, the potential safety hazard caused by the adding of the single-compound explosive is avoided, the large explosive returning quantity and serious waste during explosive loading are avoided, an explosive loading environment is improved, the labor intensity of workers is lowered, the explosion requirements of upward holes of underground mines are satisfied, and evident economic and social benefits are achieved.