摘要:
A method for producing tablets containing ammonium nitrate, including dripping a product melt containing ammonium nitrate with a drop former having a rotating, pierced drum and a nozzle strip contacting an inner face of the pierced drum, so that the product melt is pressed through openings of the pierced drum. The method additionally includes placing the product drops on a circulating cooling conveyor belt, and solidifying the product drops during the transport on the cooling conveyor belt by cooling and removing the solidified product drops from the cooling conveyor belt.
摘要:
A pulse jet system and method is disclosed. In an example, the pulse jet system includes a combustion chamber, intake ports to deliver combustion agents to the combustion chamber, an expansion chamber to cool a combustion product following combustion of the combustion agents in the combustion chamber, and an exhaust to exit the cooled gas from the expansion chamber. In another example, the pulse jet system includes a combustion chamber with intake ports to deliver combustion agents to the combustion chamber, wherein the combustion chamber is part of a four cycle engine. The pulse jet system also includes an expansion chamber to cool a combustion product following combustion of the combustion agents in the combustion chamber.
摘要:
A method forms a relatively stable ammonium nitrate composite material. The method includes (a) blending ammonium nitrate with an average particle diameter greater than about 1 mm and a substantially non-oxidizing compound in fine particle form; and (b) reducing the average size of said ammonium nitrate granules in the presence of the non-oxidizing compound in fine particle form to produce a substantially homogeneous blend of ammonium nitrate and the non-oxidizing compound having an average particle diameter of about 1 to about 1,000 μm to form a substantially non-explosive powder.
摘要:
This invention relates to explosive grade ammonium nitrate porous granules. The granules are produced in a fluidized bed and are formed through a combination of layering and agglomeration to produce ammonium nitrate granules are spherical in shape, smooth, hard and dry and do not break down easily during handling. Ammonium nitrate granules of a specific size range and density can be prepared and the size range and density of the granules can be varied, depending on the application of the granules, and this has particular advantages in preparing granules for use in ANFO explosive compositions.
摘要:
A process for the recovery of organic acids from dilute solutions such as those produced by fermentation, when the organic acids are present as dilute salt solutions, is provided. The organic acid production process is integrated with a nitrogen fertilizer production process by utilizing wasted chemical energy from the fertilizer process for acidification of the organic acid solution.
摘要:
A process for preparing free-flowing, phase-stabilized ammonium nitrate comprises the following steps. A solution of ammonium nitrate (12), a surfactant (13), a phase stabilizer (26), and an inert liquid (20) is prepared. The solution is atomized to form a stream of droplets. The droplets are freeze-dried to form agglomerates (54) of crystals of phase stabilized ammonium nitrate. The crystals of phase stabilized ammonium nitrate in the agglomerates are coated with a film comprising the surfactant. The agglomerates are disintegrated into separated free-flowing phase stabilized ammonium nitrate in the agglomerates crystals coated with a film comprising the surfactant.
摘要:
This invention relates to a method of reducing density in an ammonium nitrate product. The method comprises providing a gas generating agent in the form of a water-insoluble solid compound capable of generating gas by chemical reaction and providing an ammonium nitrate product. The water-insoluble solid gas generating agent is introduction into the ammonium nitrate product under conditions causing gas generation by the gas generating agent in the ammonium nitrate product. The ammonium nitrate product is particulated to form a particulated prilled ammonium nitrate product with reduced density. The invention also relates to a particulated ammonium nitrate product produced by this method and to the use of a gas generating agent in the form of a water-insoluble solid compound reduce density in a particulate ammonium nitrate product.
摘要:
A process for the production of ammonium nitrate bodies in particulate form wherein an ammonium nitrate/water liquid mixture containing at least 92% and preferably at most 97.5% by weight ammonium nitrate, optionally with a proportion of the ammonium nitrate substituted by alkali- and/or alkaline earth metal nitrate, and a small amount of poly-styrene sulphonate crystal-habit modifier is sprayed as droplets into an atmosphere in which cooling effects crystallization of the ammonium nitrate and which the crystallized particles are dried to remove moisture, wherein the liquid mixture also contains ammonium sulphate, the concentration of poly-styrene sulphonate in the liquid mixture being at least 0.01%, preferably in the range 0.02 to 0.06%, by weight, and the concentration of ammonium sulphate in the liquid mixture being greater than that of the poly-styrene suphonate and at least 0.04%, preferably in the range 0.06 to 0.15%, by weight. Ammonium nitrate bodies, preferably prills, produced by the process may contain less than 0.1% by weight water and be able to absorb not less than 6% of their weight of fuel oil while remaining a pourable particulate material.
摘要:
The invention relates to stabilized ammonium nitrate which no longer exhibits a transition point at 32.degree. C. Its subject-matter is a new process for stabilizing ammonium nitrate and the new stabilized ammonium nitrate thus obtained. The stabilized ammonium nitrate according to the invention includes between 1% and 7% by weight of potassium nitrate and between 0.1% and 1% by weight of an organic dye containing at least one arylsulphonate group chosen from the class consisting of benzenesulphonate groups and naphthalenesulphonate groups. The stabilization of ammonium nitrate is necessary particularly for its use in propellants.
摘要:
The present invention relates to a method of manufacturing free-flowing ammonium nitrate particles, applying an inorganic coating. The invention also comprises an anti-caking coating.