Open-air low-density modified ammonium nitrate fuel oil explosive and preparation method thereof

Abstract

The invention discloses an open-air low-density modified ammonium nitrate fuel oil explosive and a preparation method thereof. The explosive is prepared from the following raw material components in percentage by weight: 84-92% of ammonium nitrate; 0.3%-0.5% of an ammonium nitrate modifier; 2-4% of a composite oil phase; 0-14% of wood flour A; and 0-5% of a density regulator B, wherein the densityregulator B is one or a mixture of more selected from coated aluminum powder, anthracite carbon powder, hydrophobic expanded perlite and a surfactant, and the wood flour A is a mixture of 60-70% of soft wood flour and 30-40% of hard wood flour. The invention solves the problems that a modified ammonium nitrate fuel oil explosive is easily caked, high in density, poor in dispersion, large in single-hole explosive loading capacity and the like. On the premise that the stability and detonation performance of the product are guaranteed, production cost is reduced, and the safety level of the construction process is improved. Meanwhile, the formula can be produced in a customized mode according to properties of rock and requirements of users, and gradient performance of the product is improved.

Description

technical field [0001] The invention relates to the technical field of civil blasting materials, in particular to an open-air low-density modified ammonium oil explosive and a preparation method thereof. Background technique [0002] Modified ammonium oil explosive is an industrial explosive widely used in blasting engineering operations. Its advantages are simple production process, low cost of raw materials, and convenient use. However, the modified ammonium oil explosive has poor water resistance, and is easy to agglomerate and has poor fluidity during storage, which affects the stability of the explosive; The charging method leads to high charge density at the bottom of the blast hole, and even explosion rejection occurs; and due to the high density, the charge amount of a single blast hole increases, and the user cost increases. [0003] In order to solve the problem of high density of modified ammonium oil explosives, a low-density powdery modified ammonium oil explos...

AI Technical Summary

Problems solved by technology

But this explosive still has deficiencies: one, the water resistance of the product is not ideal, and it cannot be applied in the blast hole with water, which limits the scope of application of the product; two, the range of product density drop is insufficient, resulting in the charge of the product in the blast hole The density is high, the amount of charge in linear meters increases, and the cost of users increases; 3. The gradient of product performance is insufficient, and it is impossible to completely select products with different performances for different types of rocks for blasting