| 摘要 |
1525991 Explosive compositions IRECO CHEMICALS 9 Jan 1976 [20 Jan 1975] 00782/76 Heading C1D An aqueous gel or slurry explosive composition comprises an oxidizing salt dissolved in an aqueous phase, a solid fuel or a liquid fuel or both, a thickener, and, as a sensitizer, at least 20% by weight of calcium nitrate together with at least 3% by weight of sulphur. The oxidizing salt in addition to the calcium nitrate may be ammonium, alkali metal, or alkaline earth metal nitrate or perchlorate. The fuel may be finely divided aluminium, gilsonite, coal, wheat grain, methyl alcohol, ethylene glycol, formamide, or fuel oil. The thickeners referred to are guar gum, which may be of reduced molecular weight, polyacrylamide, flours, and starches. In order to reduce the density of the composition, gas or air may be introduced by the addition of sodium nitrite, hollow glass or plastics spheres, or foamed plastics beads. Examples show that the combination of calcium nitrate and sulphur is a better sensitizer than a combination of sodium nitrate and sulphur, and is cheaper to use than paint grade aluminium. |
