Rock powdery emulsion explosive and preparation method thereof

Abstract

The invention relates to a rock powdery emulsion explosive and a preparation method thereof. The rock powdery emulsion explosive is produced by that: an emulsion is formed by mixing a water phase ingredient and an oil phase ingredient in a mixer, then the emulsion is vacuum dried to be powder, and porous granulated ammonium nitrate is added into the powder. The rock powdery emulsion explosive provided in the invention, which is a high-performance safe explosive, is simple in composition; high in explosive power; and low in toxic gas content, impact sensitivity and mechanical sensitivity. The preparation method is simple and safe, and no inert substance is added into the explosive.

Description

technical field [0001] The invention relates to a rock powder emulsion explosive and a preparation method thereof, in particular to a high-performance and safe rock powder emulsion explosive which does not contain inert substances but has high working ability, low toxic gas content, low impact sensitivity and friction sensitivity and its preparation method. Background technique [0002] "Industrial Structure Adjustment Guidance Catalog (2011 Version)" and "Ministry of Industry and Information Technology's Guiding Opinions on Technological Progress of the Civilian Explosives Industry" both point out that the development of high-performance and safe industrial explosives is encouraged, the development of low-pressure and non-pressure processes is encouraged, and restrictions on and Eliminate the emulsification process where the discharge temperature of the emulsifier exceeds 130°C, and limit and eliminate industrial explosives with a toxic gas content greater than 50L / kg after...

AI Technical Summary

Problems solved by technology

Although the powdery emulsion explosive produced by spray milling has high explosive performance and good water resistance, in order to control the water content in the production process, a high temperature of more than 130°C, or even as high as 150°C is used, and the solution pressure is increased. To increase the solubility of ammonium nitrate, and the spray milling consumes a lot of energy and costs high; although negative pressure dehydration and drying can reduce the water content and improve the quality of dry milling, but the ammonium nitrate still needs 130°C to dissolve in water. The above high temperature can reduce the water content to meet the needs of dry powder making, and the water-oil phase mixing method adopted has poor uniformity and stability, and is easy to separate during the powder making process, resulting in unstable product quality. Inert substances such as silicon oxide, silicon bath soil, etc., cause the explosion performance of the product, especially the working ability, to fall below the 320ml standard, the toxic gas content exceeds the guideline 50L / kg, the impact sensitivity exceeds 15% of the standard, and the friction sensitivity exceeds 8 % of the standard, causing safety hazards in production and use, and does not meet the requirements of the technical progress guidance

[0004] Chinese patent 200810123173.7 issued to Anhui Jiangnan Chemical Co., Ltd. on December 10, 2008, entitled "Production Process of Powdered Emulsion Explosive"; May 2006 Chinese patent 200510094227.8 awarded to Nanjing University of Science and Technology on the 3rd, titled "Preparation Method of Powdered Emulsion Explosives"; "Manufacturing method"; Chinese patent 93117971.8 issued to Beijing General Research Institute of Mining and Metallurgy on April 13, 1994, entitled "Powder Emulsion Explosive and Its Preparation Method". Increase the control of water content, thereby increasing the solubility of ammonium nitrate. Some methods even use high temperatures as high as 150°C. The core process used in the above milling is spray milling with high energy consumption. While increasing energy consumption, it increases production. safety risks in the process, and run counter to the national energy-saving policy and industry technological progress guidance

[0005] In order to increase the bulk density and performance of powdery emulsion explosives, the previous technology used to add coal powder, aluminum powder, sulfur powder, TNT, RDX, silicon dioxide and other substances, Those skilled in the art know that the addition of these substances not only complicates the composition of powdery emulsion explosives, but also complicates the production process, and the industry has banned the addition of the above substances to the production of industrial explosives

The Chinese patent 200810123173.7 issued to Anhui Jiangnan Chemical Co., Ltd. on December 10, 2008, titled "Production Process of Powdered Emulsion Explosives", announced that it is fed into the drying pulverizing tower at a uniform speed through a conveyor with a frequency converter. Porous granular ammonium nitrate, the addition amount of porous granular ammonium nitrate is 5-20% of the charge in the dry pulverizing tower. Although the bulk density of the powdery emulsion explosive is improved, the control accuracy of the addition ratio is not high, which affects the stability of product quality , and directly added to the milling tower, the process requirements are more complicated, and it is not easy to observe and control

[0006] Chinese patent 200710035540.3 issued to Tang Qiuming on March 12, 2008, titled "A Negative Pressure Static Continuous Production Method for Modified Ammonium Oil Explosives", announced A negative pressure drying powder making method has been proposed, but the water phase preparation and mixing temperature still exceed 130 ° C, and the explosives produced by it cannot meet the quality standards of rock powder emulsion explosives and the industry's technical progress guidance