1 Black gunpowder period (early 17th century to mid-19th century), the mineral explosives of this period were mainly black powder. Linear-guide Railway EBM Machine Linear-Guide Railway Ebm Machine,Eight Cavities Plastic Bottle Making Machine,Pe Pp Bottle Making Machine,Automatic Blowing Bottle Machine Spe Machine , https://www.spemachine.com
Black powder is one of the four great inventions in ancient China.
2 Nitrification sweetener and ammonium nitrate explosive period (mid-19th to mid-20th century).
At this stage, the explosives applied in the mining industry are mainly nitroglycerin and ammonium nitrate explosives. 1848 ~ 1846 found that nitrate and nitroglycerine cotton, strong cotton found 1862 can detonate nitroglycerine, discovered in 1867, and prepared Ray mercury detonator, 1875 (Nobel made with nitrocellulose and nitroglycerin gelatinous explosives, since It has excellent explosive properties and thus quickly replaced black powder. However, rubber explosives are expensive and unsafe to handle. People are actively engaged in the development of new explosives. In 1887, ammonium nitrate and fuel-type ammonium nitrate mixed explosives were successfully developed. It laid the foundation for the coexistence and competition of ammonium nitrate and nitroglycerin, which continued to the 1950s.
During the period of 3 nitrification explosives, in the 1950s, mining explosives entered a new stage of development. Its main symbol is the development and popularization of money-fried drugs, ammonium ladder explosives and slurry explosives. The production of nitrifying sweeteners is decreasing. After the slurry explosives, in the 1970s, water-gel explosives and emulsion explosives appeared one after another, forming an explosive-containing system. Currently, a wide variety of mining explosives, mainly granular and powdered explosives by oil, powdered and granular hydrous iron ladder drugs and explosives.
Money fried drugs and water-gel explosives (including slurry explosives) are widely used abroad. 1983 US metal ore, non-metallic minerals (excluding coal mine) and quarry explosives were consumed 430,400 tons, which accounted for 80.4% iron nitrate fuel oil explosive, water and slurry explosives accounted for 15.2%, other explosives only 4.4%.
China has a strong production base according to the fried medicine and Qianti explosives. The annual output and dosage are over 700,000 tons, ranking the highest in all kinds of explosives.
Aqueous explosives, especially emulsion explosives and water-gel explosives, are promising anti-permanent explosives.
Development of mining explosives
The development of mining explosives can be divided into three periods according to their main use of drugs: