Method for preparing burster of double salt of spherical alkali type lead picrate and azide lead

A technology of lead azide and picric acid is applied in the directions of compositions, explosives, and offensive equipment containing nitrated metal organic compounds, which can solve the difficulty in popularization and application of K·D double-salt detonators, disadvantageous detonator assembly safety, and crystallization. It is difficult to control and other problems, so as to achieve the effect of facilitating constant volume metering, stable and reliable product quality, and improving intrinsic safety.

Inactive Publication Date: 2007-02-14
NANJING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

However, there are defects in the existing preparation method of K·D double salt primer: the crystallization is not easy to control, and irregular rod-like crystals often appear, and the product has high mechanical sensitivity; The high frequency of "compression explosion" in the process is not conducive to the safety of the assembly of the detonator, which brings difficulties to the popularization and application of K·D double salt primer
However, there is no spherical primary explosive crystal in China

Method used

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  • Method for preparing burster of double salt of spherical alkali type lead picrate and azide lead

Examples

Experimental program
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Embodiment 1

[0011] Embodiment 1: in conjunction with the accompanying drawings, first add 29L~33L 18% lead nitrate in the compounder, then add 45L pure water and 5L 5% dextrin solution, as the base liquid, control pH to be 4.0~5.0; 48L sodium picrate alkaline solution (additional NaOH solution) and 11.5L ~ 13.5L 10% sodium azide solution to form a mixed solution; under stirring, add 2.6L of the mixed solution into the compounder at 60°C to 80°C as the advance solution, and then drop it into the mixture at a constant speed after 5 minutes Liquid, the feeding time is 30min~60min, continue to react for 5min after feeding, then lower to about 50°C, siphon the upper mother liquor, add pure water into the compounder, wash twice with water, and discharge. Product false density can reach 2.1g / cm 3 .

Embodiment 2

[0012] Embodiment 2: add 440mL of pure water and 20mL~60mL of 5% dextrin solution in the compounder earlier, with this as bottom liquid, adjust bottom liquid pH to be 4.5~5.0; Then with 18% lead nitrate solution 115mL and mixed solution ( The composition and mixing ratio are the same as in Example 1) 230mL is the dripping liquid; before feeding, add the advance liquid in the ratio of mixed liquid: lead nitrate solution = 4:2 (mL / min) in the compounder, and stop feeding for 5 minutes after 3 minutes. Then add at a uniform speed according to the above-mentioned flow rate ratio, and the reaction completes to separate out the material, and all the other are the same as in Example 1.

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Abstract

A spherical detonating explosive is prepared through mixing the composite crystal form controlling agent, sodium azide and the alkaline solution of sodium picrate to obtain mixed solution, adding dextrin solution to the solution of lead nitrate to obtain basic solution, adding less mixed solution to the basic solution, adding rest of mixed solution to the basic solution at 65-80 deg.C within 30-60 min, regulating pH value, siphonating mother liquid, and water washing. Its advantages are high compression resistance, detonating power, flame sensitivity and thermal stability, and no environmental pollution.

Description

a technical field [0001] The invention relates to a preparation method of a basic lead picrate and lead azide double salt primer for industrial detonators, in particular to a preparation method of a spherical basic lead picrate and lead azide double salt primer. Two background technology [0002] There are many kinds of detonators for detonators, such as dextrin lead nitride, DDNP, D·S co-precipitation, GTG, K·D double salt detonators, etc., among which K·D double salt detonators are basic picric acid lead and stacked The abbreviation of lead nitride double salt primer, it is a new type of primer with excellent performance invented by Liu Zizheng and Jiang Rongguang of East China Institute of Technology in the 1980s, and won the third prize of the National Invention Award in 1988. Excellent and stable; safe in production and use; less waste water, simple components, easy to handle; easy to use raw materials, low cost and other advantages. Since the launch of the primer, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B41/08C06B41/04C06B31/18
Inventor 蒋荣光刘自铴
Owner NANJING UNIV OF SCI & TECH
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