Modified ammonium nitrate fuel explosive negatively pressurized static continuous production method

Abstract

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.

Description

technical field [0001] The present invention relates to a method for producing ammonium oil explosives, in particular to a negative pressure static continuous production method for modified ammonium oil explosives Background technique [0002] Powdered ammonium nitrate explosives are currently the most widely used industrial explosives, mainly including ammonium ladder explosives and ammonium oil explosives. Generally speaking, ammonium-titer explosives contain a strong explosive sensitizer, TNT, and its explosive performance is better than that of ammonium oil explosives, but TNT is a toxic component, harmful to the human body, and the cost is high. Ammonium oil explosives are low in cost and simple in production process, but their explosive performance is poor, and they are prone to oil leakage and deterioration, and are not resistant to storage. Both of the above are easy to absorb moisture and agglomerate, have poor water resistance, and because of the low detonation ve...

AI Technical Summary

Problems solved by technology

The advantage of the explosive is that it does not contain TNT, which improves the explosive performance of the ammonium oil explosive, but still has the following defects: (1) during the mixing and drying process of the oil-in-water emulsion in the wheel mill, the ammonium nitrate begins to crystallize and mixes with the oil phase materials and additives such as wood flour, this process is still mechanical mixing, which can only improve the coating condition of the oil film on the surface of ammonium nitrate in the prior art to a certain extent, and does not completely solve the problem of moisture-proof caking, and the water resistance of explosives The ability has not been significantly improved; because the growth process of the crystal grains cannot be effectively controlled, its dispersion uniformity is still poor, which directly affects the explosive performance of ammonium oil explosives; (2) when preparing a saturated solution of ammonium nitrate, the water content reaches 3%-10%, and the moisture content of the final product is required to be less than 0.3%. The evaporation of water requires a lot of heat energy, so the energy consumption is high and the production cycle is also long

In order to prevent the re-agglomeration of ammonium nitrate after primary crushing, before the secondary crushing, ammonium nitrate is pretreated with surfactant, and the particle size of the product after the above treatment is too large, so its explosive performance is not good.

[0004] Chinese invention patent CN 1727314A discloses a "high-energy stepless powder explosive and its preparation method", in which fatty acid or lauryl nitrate, anionic surfactant, sodium sulfate hydrate, combustible Various additives such as organic water-repellent agent, the formula is complex; adopt the known airflow atomization granulation drying method, the energy consumption is high; the manufacturing cost is also high; water cooling is used, once the cooling water jacket leaks, the water content in the explosive will exceed the standard

[0005] Chinese invention patent applications CN 1837165A and CN 1837164A respectively disclose a "stepless powdery modified ammonium oil explosive and its preparation method" and "a powdery ammonium oil explosive and its preparation method". Cementing agent, water phase and oil phase semi-finished products need to be added after the preparation of cross-linking agent, and the final explosive product is oil-in-water type, anti-caking and water resistance are not good

[0006] Chinese Invention Patent Application No. 200610136796.9 discloses a production process of powdered explosives. The emulsification process of this technology still requires the stirring and emulsification of the emulsifier, and the emulsifier still needs to be added to the oil phase material. Conventional water cooling is used for cooling, which is not only easy to absorb moisture , and the amount of medicine stored is large, there are certain safety hazards, and the energy consumption is also high