62 results about "ANFO" patented technology

The invention relates to a viscous and granular anfo (ammonium nitrate and fuel oil) explosive and a preparation method thereof. The explosive comprises the following raw material components in parts by weight: 93-96 parts of porous granulated ammonium nitrate, 4-7 parts of diesel oil, 0.15-0.25 part of powdered polyacrylamide, 4-6 parts of colloidal polyacrylamide and 4-7 parts of a waste emulsion explosive or an emulsion explosive matrix. The viscous and granular anfo explosive disclosed by the invention effectively uses the waste emulsion explosive or the emulsion explosive matrix, well solves the problems of safety treatment on the waste emulsion explosive or the emulsion explosive matrix, is simple in preparation process and convenient in production, and is convenient for large-scale production and application of blasting sites.

The invention relates to a low-detonation velocity anfo explosive and a preparation method thereof. The low-detonation velocity anfo explosive comprises 77-88 parts of modified powdery anfo explosive, 10-20 parts of porous granulated ammonium nitrate and 2-3 parts of polystyrene foam plastic microballoon, wherein the modified powdery anfo explosive mainly comprises 74.54-84.66 parts of crystallized ammonium nitrate, 0.15-0.26 part of modifying agent and 2.31-3.08 parts of compound oil phase; and the compound oil phase comprises 1.71-2.12 parts of paraffin, 0.58-0.86 part of rosin and 0.02-0.06 part of Span 80 emulsifying agent. The preparation method comprises the following steps of: mixing the crystallized ammonium nitrate and the modifying agent, crushing and drying; and then mixing with the compound oil phase; finally adding the porous granulated ammonium nitrate and the polystyrene foam plastic microballoon and uniformly mixing to obtain the low-detonation velocity anfo explosive with the density less than 0.55g/cm<3> and the detonation speed less than 2,600m/s. The explosive has the advantages of favorable particle flowability, convenience for filling into a blast hole, low detonation velocity, low density and capability of meeting the requirements for using the explosive on smooth surface blasting and presplitting blasting of mines, highways, railways and open-air deep-hole slopes.

The invention relates to a new material for a modified ANFO explosive, and in particular relates to a modified ANFO explosive and a preparing method thereof by using rice hull powder and sunflower seed hide powder as a combustible agent. The modified ANFO explosive comprises, by matched group, 91.5%-93.5wt% of ammonium nitrate, 0.2-0.4wt% of compound modifying agent, 3.0-4.0wt% of compound oil phase and 3.5-4.5wt% of combustible agent, wherein the matching ratio total of raw materials is 100%, the compound modified agent is one or more of octadecylamine phosphate, sulfonate or borate, the compound oil phase is one or more of paraffin, soap wax, asphalt, three line oil and microcrystalline wax, and the combustible agent is a mixture of the rice hull powder and the sunflower seed hide powder. According to the modified ANFO explosive and the preparing method thereof, rice hull powder serves as the combustible agent of the modified ANFO explosive, not only the explosion performance of the explosive is improved, but also the product physical property is improved, and the product storage life is prolonged.

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 provides a safe production process of emulsified granular ammonium explosives, belonging to the field of explosive preparation methods. The specific steps of the safe production process of the emulsified granular ammonium explosives are raw material preparation, preparation of water, oil phase and sensitizer, continuous emulsification, Charge sensitization, coil cooling and packaging and storage processes. The preparation method of the invention is simple and safe, and the automatic packaging and automatic storage methods greatly reduce the labor intensity, ensure the production safety, and at the same time solve the problems that the original preparation method is unsafe, the operation labor intensity is high, and the operation method is not practical. , in order to make the preparation safer, ensure the safety of personnel operation, and improve the preparation efficiency.

The invention discloses a rock type low-temperature anti-caking modified ANFO (Ammonium Nitrate Fuel Oil) explosive and a preparation method thereof. The ANFO explosive is prepared from the following raw materials in percentages by mass: 90.5-92.0% of ammonium nitrate, 4.5-5.5% of wood flour, 0.3-0.5% of composite modifying agent, and 3.0-4.0% of composite oil phase, wherein the passing rate of the wood flour on a 40-mesh screen is not less than 90wt%, the kinematic viscosity of the composite oil phase at 100 DEG C is 12-16mm<2>/s, and the drop melting point of the composite oil phase is 20-32 DEG C. The preparation method of the ANFO explosive comprises the following steps: drying the ammonium nitrate, adding the composite modifying agent into the dried ammonium nitrate for modification, adding the composite oil phase and the wood flour into the modified ammonium nitrate and uniformly mixing, conveying the uniform mixture into a continuous type ball mill by using a feed screw conveyor for continuous milling and mixing, cooling to be not higher than 40 DEG C, and at last carrying out charging and packaging by using a full-automatic charging machine to obtain a product with the water content not high than 0.15%. The production process of the ANFO explosive disclosed by the invention is safe and reliable, the raw materials can be uniformly mixed, the free-running property of the produced explosive is improved, and the anti-caking capacity of the explosive at a low-temperature state is improved.

As has been established, the use of energetic materials, generated by manufacturer's excess and/or demilitarization projects, as ingredients in commercial blasting explosives is a feasible and environmentally acceptable method of handling them. Ammonium picrate is used as an explosive charge in the manufacturing of conventional ammunition rounds, such as large caliber navy guns. The present invention is directed to the use of recovered ammonium picrate in commercial blasting agent compositions, that include watergel slurries, ANFO, HANFO-blends and emulsion based blasting agents. These new blasting agents exhibit favorable cost for performance characteristics and have found a use for recovered ammonium picrate, which would heretofore have been incinerated or otherwise disposed of at significant cost.

The invention relates to a mixed loading explosive automobile, and specifically provides an elevated type on-site granular ANFO (Ammonium Nitrate Fuel Oil) explosive mixed loading automobile, which is simple and reasonable in structure and convenient, safe and reliable in operation. The technical scheme adopted by the invention is that the elevated type on-site granular ANFO explosive mixed loading automobile comprises an automobile body, wherein a chassis of the automobile body is provided with a fuel oil device and a dry material box, the bottom part of a material cabin of the dry material box is provided with a box body helix, a frame at the rear part of the automobile body is vertically provided with a vertical helix, the lower part of the vertical helix is communicated with the box body helix, the top part of the vertical helix and a top helix are communicated and hinged together, a cylinder body of a hydraulic cylinder is hinged to a fixing frame at the middle part of the vertical helix, and a piston rod of the hydraulic cylinder is hinged to the middle part of the top helix. The elevated type on-site granular ANFO explosive mixed loading automobile disclosed by the invention is mainly used for mixed loading of ANFO explosive.

The invention relates to an on-site mixing method and car of a ground and underground viscous porous granular ANFO explosive. A loading platform which is fixed on the ground is adopted, and porous granular ammonium nitrate, composite special oil, a setting agent and a thickener are transported into the loading platform fixed on the ground by manpower through a trolley and are respectively arranged in a porous granular ammonium nitrate storage tank, a composite special oil storage tank, a setting agent storage tank and a thickener storage tank on the on-site mixing car; after that, the on-site mixing car is driven to a blasting site, and viscous porous granular ANFO explosives can be obtained by mixing the porous granular ammonium nitrate, the composite special oil, the setting agent and the thickener; and therefore, the continuity and the automation of the preparation technology can be realized, the manufacturing process is safe and high in reliability, the explosive is good in viscidity, and a product is stable in quality and good in blasting effect. The on-site mixing method and car have the powder charge efficiency of more than 2t/h for a blast hole with phi 70mm, thus being suitable for the blast holes with more than phi 100mm of steps of a surface mine and suitable for powder charging, mining and blasting of an underground tunneling opposite hole and an underground inclined hole blast hole with phi 60-100mm.

An explosive composition is provided that is comprised of a Heavy ANFO and grain hulls. In one embodiment, the grain hulls are comprised of rice hulls. The grain hulls serve both as an inert bulking additive that reduces the density of the composition and as a sensitizer that reduces the energy needed to reliably detonate the composition. Also provided is a method for manufacturing an explosive composition comprised of Heavy ANFO and grain hulls, such as rice hulls. Additionally, a method of using an explosive comprised of ANFO and grain hulls in a mining operation is disclosed.

The invention relates to a production method and a device of anfo explosives, which are characterized in that: the production method comprising the following steps of: adopting the anfo explosives which are formed by mixing crushed ammonium nitrate and diesel, taking the material, crushing, mixing, discharging, packaging, sealing and the like. The production method of the anfo explosives has a simple process, and is easy to operate and achieve streamline production; and the production device drastically improves production safety of the anfo explosives, saves labor resources and energy, is clean and safe, is easy to process and product, and reduces production cost.

The invention discloses an ANFO-expanded high-explosion-velocity seismic charge which comprises the following raw materials in parts by weight: 90-94 parts of ammonium nitrate, 0.12-0.15 part of swelling agent, 0.01-0.03 part of dispersant, 0.01-0.03 part of emulsifier, 5-6 parts of compound oil phase, 0.2-0.4 part of weighting agent and 1-2 parts of aluminum powder. The seismic charge disclosed by the invention has good explosive performance, TNT (Trinitrotoluene) poisonous substances are thoroughly canceled, and substances harmful to human bodies are not added or contained; the production environment is greatly improved compared with that of a traditional AN-TNT explosive, and the damage of TNT to the bodies of personnel is prevented; and the seismic charge has a simple production process with low production energy consumption, the components of the seismic charge do not contain any highly-sensitive substances, and the safety of production and transportation processes is higher.

An explosive formulation used in blasting operations such as, but not limited to, mining operations and the like. The formulation is composed of a modified form of Ammonium Nitrate Fuel Oil (ANFO) explosives which have been modified by the incorporation of a solid fuel material. The formulation comprising a dry granular solid component, a liquid high-boiling point component of about 4% by weight, and a solid fuel material. The solid fuel material comprising vitrinite macerals, liptinite macerals, and inert macerals fusinite and semifusinite, and is characterized as (1) having a concentrate of liptinite that is higher than normal coals, and (2) having a concentrate of pseudovitrinite that is significantly lower than normal coals.

The disclosure relates to embodiments of an explosive formulation comprising a detonable mixture of an oxidizing agent such as carbon dioxide, and a material that decomposes the oxidizing agent exothermically (a reducing agent), and additives that increase the mixture's shock sensitivity. The formulations may be used in a method to produce diamonds or nano oxides or in other applications that use traditional explosives such as, but not limited to: ammonium nitrate and fuel oil combinations (ANFO), watergel explosives, emulsion explosives and RDX.

The present invention relates to a rock blasting method using pipes embedded in explosive layers of blast waterhole, namely relates to a method for implementing the rock blasting by which a pipe body does not deform in the water in the ANFO explosive or gel bulk explosive, and by hiding the tubular pipe body recessed in the water in the water in a blasthole, and utilizing the substance in an explosive layer to fill the pipe body. Therefore, the size of the pipe body is increased correspondingly, by prolonging the filling length of the explosive towards an upper free surface, the transmission area of the laccolite at one side of the free surface at blasting is increased, and the total pressure is increased substantially, and accordingly, the whole stone generation amount at the rock blasting is reduced, the explosive use amount also can be reduced, and the damping and sonic boom are reduced.

The invention discloses an aqueous medium spacer. The aqueous medium spacer comprises a spacer main body and a top cofferdam. The spacer main body is of a drum-shaped structure and comprises a circular top face, a circular bottom face and a side face arranged between the top face and the bottom face in a surrounding mode. A water filling nozzle is arranged on the top face, the top cofferdam is arranged on the connecting position of the top face and the side face of the spacer main body, and the top cofferdam is of a horn-shaped structure gradually expanding in the upward direction. The aqueous medium spacer has the advantages that the blasting pressure of the bottoms of blast holes is improved, and blasting vibration is reduced; the explosive load in the blast holes is reduced, and blasting unit consumption is reduced; an explosive loading structure is improved, and the explosive acting position is reasonably arranged; and waterproof spacing is achieved, and after spacing is conducted in the local water-poor blast holes, low-cost multi-hole granulous anfo explosives can be used. Compared with an air spacer, the aqueous medium spacer has the advantages that compressibility is small, the filled medium quantity is convenient to control, the influence under the climatic temperature condition is small, and the influence under the water depth pressure in the holes is small.

The present invention provides for the use of at least one oil soluble polymer comprising linear polymethylene sequences with an average of 10 to 40 consecutive methylene groups to improve the water resistance of an explosive composition comprising particulate ammonium nitrate and a fuel oil, said linear polymethylene sequences with in average 10 to 40 consecutive methylene groups may be either inthe main chain or in the side chains of the oil soluble polymer.

The invention discloses an on-site mixed and expanded ammonium nitrate explosive and a production method thereof, belonging to the technical field of explosives and the production method thereof. The on-site mixed and expanded ammonium nitrate explosive comprises the following components in part by weight: 94-96.5 parts of expanded ammonium nitrate and 3.5-6 parts of diesel oil. The expanded ammonium nitrate is prepared in advance, and the expanded ammonium nitrate and the diesel oil are mixed by an on-site explosive mixing vehicle on a blasting site. The on-site mixed and expanded ammonium nitrate explosive does not have the detonator sensitivity, and compared with the porous granular anfo explosive, the on-site mixed and expanded ammonium nitrate explosive has lower density, high performance, and higher explosive loading volume ratio of the blasthole. In the production method, the explosive manufacturing process and the blasthole loading process are carried out on a construction site at the same time, and before mixing, only raw materials or semifinished products are stored on the blasting site, so that the production safety and the loading safety are obviously improved and a requirement on the storage stability of the explosive is greatly reduced.

The invention discloses a porous granular ammonium oil explosive oil phase material with low cost, clean and environment-friendly, and high performance and a preparation method thereof. The oil phase of the porous granular ammonium oil explosive of the present invention is composed of (mass%) 88%-94% of hydrogenated heavy oil, 3%-6% of calorific value increasing agent and 3%-6% of antifreezing agent. The porous granular ammonium oil explosive of the present invention has good oil solubility in the oil phase, can add waste mineral oil to realize the reuse of waste oil energy, and has a good environmental protection effect; at the same time, the prepared explosive has excellent blasting performance and low production cost. It is suitable for industrial production and popularization.

The invention belongs to the field of functional chemicals, and particularly relates to a porous granular ammonium frying medicinal surfactant, a porous granular ammonium frying medicinal performanceenhancer, a preparation method of same, and a porous granular ammonium nitrate fuel oil explosive. The surfactant comprises at least one of compounds represented by a general formula I, a general formula II and a general formula III. The surfactant provided by the invention is further prepared into a performance enhancer for porous granular ammonium nitrate fuel oil explosives, so that the ANFO has excellent detonation performance and storage stability.

The invention relates to an application of Sudan red for preparing an ammonium nitrate fuel oil explosive (ANFO), and an ANFO containing the Sudan red and a preparation method thereof. The invention can enable a field operator to visually ensure that the ANFO meeting the formula requirement into each blast hole through a color board, reduces the emission of toxic gas, improves the capacity for work of the explosive, obtains good blasting effect, and meets the requirement of green organization on least content of toxic gas generated after the explosive explodes.

The invention belongs to a porous granular ammonium oil explosive adhesive which is characterized by comprising the following components in percentage by weight: 1.5 to 4 percent of polyacrylamide, 0 to 20 percent of glycol, 10 to 20 percent of urea, 40 to 70 percent of sodium nitrate, 0 to 20 percent of aluminum powder and 10 to 30 percent of water. A method for preparing the porous granular ammonium oil explosive adhesive comprises the following steps of: sieving raw materials, dissolving the urea in the water, dispersing the polyacrylamide and the glycol, mixing, and stirring. In the adhesive, ordinary chemicals are used as the raw materials, dust, toxicity and the pollution of waste water, waste gas and industrial residues are avoided in the production and use process, so the process is simple, investment is small, energy is saved, production cost is low and agglomeration is avoided, and the prepared porous granular ammonium oil explosive does not block the pipe and is not returned and few explosive drops during underground mechanical wind pressure charging, and the explosive has the characteristics of long storage period, namely over six months and environment friendliness, reaches the using standard of the explosive in the prior art and is particularly suitable for operation modes used in mixing sites of mines.

A readily gasified additive has been added to AN (ammonium nitrate) based bulk explosives (ANFO, emulsions, and combinations thereof) with positive results, due to the time, temperature, and pressure conditions generated in a blasthole. The preferred final explosive mixture is primarily comprised of AN, fuel oil, and a carbonaceous additive material that is characterized as being readily gasified as indicated by its rapid release of volatile materials and char formation, the high internal porosity and surface area of the base material and its char, and the uniform distribution of catalytic mineral matter throughout the material. It is understood that other readily gasified additives may be similarly effective.