scholarly journals The Effect of the Energetic Additive Coated MgH2 on the Power of Emulsion Explosives Sensitized by Glass Microballoons

2016 ◽  
Vol 13 (3) ◽  
pp. 705-713 ◽  
Author(s):  
Yangfan Cheng ◽  
Quan Wang ◽  
Feng Liu ◽  
Honghao Ma ◽  
Zhaowu Shen ◽  
...  
Keyword(s):  
Emulsion Explosives ◽  
Glass Microballoons

Influence of Different Gases on the Performance of Gas‐Storage Glass Microballoons in Emulsion Explosives

2020 ◽  
Vol 45 (10) ◽  
pp. 1566-1572
Author(s):  
Yixin Wang ◽  
Honghao Ma ◽  
Zhaowu Shen ◽  
Jiping Chen ◽  
Liangliang Huang
Keyword(s):  
Gas Storage ◽  
Emulsion Explosives ◽  
Glass Microballoons ◽  
Different Gases

Detonation Characteristics of Emulsion Explosives Sensitized by Hydrogen-Storage Glass Microballoons

2018 ◽  
Vol 43 (9) ◽  
pp. 939-947 ◽  
Author(s):  
Yixin Wang ◽  
Honghao Ma ◽  
Zhaowu Shen ◽  
Bo Wang ◽  
Bing Xue ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Emulsion Explosives ◽  
Glass Microballoons ◽  
Detonation Characteristics

Detonation characteristics of emulsion explosives sensitized by MgH2

2013 ◽  
Vol 49 (5) ◽  
pp. 614-619 ◽  
Author(s):  
Ya. F. Cheng ◽  
H. H. Ma ◽  
Zh. W. Shen
Keyword(s):  
Emulsion Explosives ◽  
Detonation Characteristics

Trowelable Rubber Rocket Insulation for Use at 2800°C

1984 ◽  
Vol 57 (4) ◽  
pp. 843-854 ◽  
Author(s):  
J. G. Sommer
Keyword(s):  
Room Temperature ◽  
Loss Rate ◽  
Service Temperature ◽  
Material Loss ◽  
Blowing Agent ◽  
Unusual Combination ◽  
Novel Approaches ◽  
Glass Microballoons ◽  
Burning Propellant ◽  
Intense Heat

Abstract Ablative, trowelable rocket insulation was prepared; it crosslinks at room temperature and self-bonds to prevulcanized NBR insulation. The material loss rate (MLR) of this insulation is low when it is tested by an oxyacetylene torch at temperatures of about 2800°C. Boric acid in the insulation causes an effective char to form at service temperature. This char slows the loss rate of nondegraded insulation beneath it. Density of this nondegraded insulation is 1.3 g/cm3. Density is reduced sharply to 0.8 g/cm3 by incorporating glass microballoons. They cause only a slight increase in MLR of the insulation at service temperatures. MLR can be significantly reduced by incorporating a blowing agent which decomposes only after the insulation is exposed to service temperature. Hence, an unusual combination of requirements is met by several novel approaches. This insulation has protected rockets as large as 6.6 meters in diameter from the intense heat of burning propellant in service.

Thermal Decomposition Conditions of Emulsion Matrix in the Emulsifier

2014 ◽  
Vol 1082 ◽  
pp. 387-390
Author(s):  
Hui Sheng Zhou ◽  
Xing Hua Xie ◽  
Kang Xu
Keyword(s):  
Thermal Decomposition ◽  
Ammonium Nitrate ◽  
Hot Spots ◽  
Hot Spot ◽  
Decomposition Mechanism ◽  
Heat Accumulation ◽  
Emulsion Explosives ◽  
Starting Point ◽  
Emulsion Matrix

The main background was the "3.11" accident in this paper. The starting point was based on the experts’ conclusions of investigation and analysis in the accident. Combining the decomposition mechanism of ammonium nitrate in the emulsion explosives and the lessons from the production of emulsion explosives explosion, the conditions of the emulsion explosives (matrix) thermal decomposition in the emulsifier are given that are the formation of hot spot and the accumulation of heat. Then the factors of hot spots generated in the production of emulsion explosives and the occurred conditions of the heat accumulation are analyzed and summarized.

Improvement of the Thermocouple Method for Testing Energy-Intensive Emulsions for Compatibility with the Sulfide Ores

2021 ◽  
pp. 58-63
Author(s):  
N.I. Akinin ◽  
◽  
A.S. Garmashov ◽  
V.V. Rudomazin ◽  
◽  
...  
Keyword(s):  
Ammonium Nitrate ◽  
Testing Temperature ◽  
Point Of View ◽  
Spontaneous Ignition ◽  
Sulfide Ores ◽  
Chemical Compatibility ◽  
Emulsion Explosives ◽  
Safety Testing ◽  
Sulphide Ores ◽  
Thermocouple Method

The results are presented concerning improving the thermostatic method for studying the chemical compatibility of modern industrial emulsion explosives based on the ammonium nitrate with surrounding materials, the increased reactivity of which can lead to spontaneous ignition and even explosion. An assessment of the compatibility of emulsion explosives with sulphide ores was conducted using an original thermocouple methodology developed at the D. Mendeleyev University of Chemical Technology of Russia, fixation of the thermal effects of the interaction of shell-free explosives based on the ammonium nitrate with sulfide minerals. Improved thermocouple method allows to determine chemical compatibility of the industrial explosives with the reactive rocks. It is distinguished by the possibility of continuous recording of the thermocouple measurements during tests using an oscilloscope and combines the reliability of the results with small laboratory weights of the test samples (no more than 20 g, which ensures safety testing). Temperature measurement accuracy is ± 2 °С. It is concluded that the method used is able to identify the cases of the most dangerous interaction from the practice point of view using the emulsion explosives when the pyrite content in the ore exceeds 85 %. The results of experiments on the applicability of thermocouple measurements to testing low-activity rocks, highly reactive pyrite ores, mixed sulfide ores of medium activity, as well as on the identification of the main regularities of heat release during the interaction of emulsion explosives with the sulfide ores are considered.

Coating of Levitated Glass Microballoons

1980 ◽  
Vol 15 (1) ◽  
pp. 51-60 ◽  
Author(s):  
R. Liepins ◽  
A. T. Lowe
Keyword(s):  
Glass Microballoons

Enlightment of “May 20” Explosion Accident

2014 ◽  
Vol 1082 ◽  
pp. 391-394 ◽  
Author(s):  
Xing Hua Xie ◽  
Lei Wang ◽  
Hui Sheng Zhou
Keyword(s):  
Thermal Decomposition ◽  
Production Process ◽  
Ammonium Nitrate ◽  
Hot Spots ◽  
Hot Spot ◽  
Decomposition Mechanism ◽  
Heat Accumulation ◽  
Emulsion Explosive ◽  
Emulsion Explosives

This paper introduces the "5.20" of the emulsion explosive incident and analysis the cause of the accident. Based on the production of explosion accident summarizes the security problems of emulsion explosive production process, and relevant measures are put forward. Combining the decomposition mechanism of ammonium nitrate in the emulsion explosives and the lessons from the production of emulsion explosives explosion, the conditions of the emulsion explosives (matrix) thermal decomposition in the emulsifier are given that are the formation of hot spot and the accumulation of heat. Then the factors of hot spots generated in the production of emulsion explosives and the occurred conditions of the heat accumulation are analyzed and summarized.

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