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Large-particle ammonium nitrate product and preparation method thereof

A technology of ammonium nitrate and large particles, which is applied in the direction of ammonium nitrate, chemical instruments and methods, and ammonia compounds. The effect of high looseness and low running cost

Inactive Publication Date: 2017-11-24
TIANJIN HUAJING CHEM ENG NEW TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Liquid ammonium nitrate is directly concentrated ammonium nitrate solution as a commodity, which has the advantage of being convenient to use, but its disadvantage is that it is not suitable for long-term storage
Crystallized ammonium nitrate is concentrated ammonium nitrate solution and then vacuum crystallized to obtain a powdery crystalline product. This product is very easy to absorb moisture and agglomerate, and the user needs to crush it before use. The crushing workload is heavy and unsafe.

Method used

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  • Large-particle ammonium nitrate product and preparation method thereof
  • Large-particle ammonium nitrate product and preparation method thereof
  • Large-particle ammonium nitrate product and preparation method thereof

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Embodiment Construction

[0025] The invention will be described in detail below.

[0026] The granular ammonium nitrate created by the present invention has a particle size of more than 3mm, preferably 3-5mm. Further, the ammonium nitrate has an average compressive strength of more than 20N / particle; free water content is less than 0.25wt%; under the condition of not adding caking agent, the looseness is more than 95%. The product index of large particle ammonium nitrate provided by the present invention is compared with the existing product index as shown in Table 1.

[0027] Table 1

[0028]

[0029]

[0030] The present invention creates a method for preparing the above-mentioned large-grain ammonium nitrate, which includes the following granulation steps: the ammonium nitrate particles are repeatedly coated by the atomized ammonium nitrate concentrate, and the ammonium nitrate concentrate is coated with ammonium nitrate after each coating. The surface of the particles is allowed to crystal...

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Abstract

The invention provides a large-particle ammonium nitrate product, and a preparation method and a preparation system thereof. A revolving pelletizer is adopted, ammonium nitrate particles are circularly wrapped by the atomized ammonium nitrate concentrated liquid, and the ammonium nitrate concentrated liquid is crystallized and solidified on the surfaces of the ammonium nitrate particles after wrapping at each time until the ammonium nitrate particles grow the required size. The particle size of the obtained large-particle ammonium nitrate is above 3 mm, the product has high storage performance, the production process and the system are safe and reliable, and the operating cost is low.

Description

technical field [0001] The invention belongs to the technical field of ammonium nitrate production, and specifically relates to a large-grain ammonium nitrate product and a preparation method and system thereof. Background technique [0002] As a commodity, ammonium nitrate products are currently mainly used in the civil explosive industry. The product categories mainly include porous ammonium nitrate, liquid ammonium nitrate, industrial ammonium nitrate (small particles of ammonium nitrate produced in high towers), and crystalline ammonium nitrate. Among them, porous ammonium nitrate is mainly used to manufacture commercial-grade and on-site mixed-grade ammonium oil explosives. The uses of liquid ammonium nitrate, industrial ammonium nitrate, and crystalline ammonium nitrate are roughly the same, and can be used to manufacture emulsion explosives, puffed explosives, water-gel explosives, etc. [0003] Liquid ammonium nitrate is directly concentrated ammonium nitrate solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/18
CPCC01C1/185C01P2004/32C01P2004/60C01P2006/21C01P2006/80
Inventor 景双伍柴向阳崔贵全刘振路薛永强
Owner TIANJIN HUAJING CHEM ENG NEW TECH DEV
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