KR970002034B1 - Method for preparation of detonating fuses - Google Patents

Abstract

The detonating fuse was manufactured by coating a plastic tape three times having wick threads and PETN(Pentaerythrite tetranitrate)) blasting powders with coated threads. The second grade blasting powder is mixed with a binder such as low component amylose dextrin, followed by particlizing to fourth grade, and put into the plastic tape. The particles are crushed to the second grade, and coated to give the detonating fuse. The particlized blasting powders are used more than 2.88 /m.

Description

Manufacturing method of low drug dose line

1 is a structural diagram of a dopant ship.

2 is a process chart of a conventional method for manufacturing a line width.

3 is a process chart of the manufacturing method of the dopant wire of the present invention.

* Explanation of symbols for main parts of the drawings

1: cardio 2: screening

3: plastic tape 4: primary covering yarn

5: 2nd cover yarn 6: 3rd cover yarn

7: plastic coating 8: cardiac synthesis

9: assembly 10: drying

11: contract

The present invention relates to a method for manufacturing a dopant used in the explosive work, such as blasting work, and more specifically, a low-dose drug that lowers the amount of detonation of the dopant to minimize the amount of depletion of the dopant while maintaining the same level of detonation capacity The invention relates to a method for producing a dopant wire.

In the conventional method for manufacturing the dopant, as shown in FIG. 1, the core drug (1) mainly containing penta erythrite tetranitrate (PETN) is used in the plastic tape (3) together with the screening (2), and the outside of the coated yarn It was produced by covering with (4, 5, 6) three times and sealing it with the plastic coating (7) outside.

By the way, the drug (1) used at this time has a 99.99% probability that the dose of the detonation line (minimum detonation amount) that can be fully detonated (10.26g per 1m depot), the product mainly has been produced 11-12g / m.

However, the noise pollution when blasting due to the large explosion in the case of using the width of this standard has been a cause of civil efficiency of work efficiency and the surrounding license, the present invention is to reduce the amount of explosion by lowering the minimum amount of the above-described explosion It is designed to reduce costs by preventing the noise pollution and reducing the amount of powder used.

As described above, in order to reduce the minimum amount of aeration, it is possible to reduce the amount of gunpowder required by lowering the particle size of the core drug (1) used in the plunger line, thereby improving the explosiveness.

As shown in Table 1, the higher the grade, the thicker the grain size. Until now, only four grades having good flowability have been used since the grain is thick.

On the other hand, in order to reduce the amount of gunpowder and to obtain the same detonation, low grade granules should be used. In the case of powdered grade 2 grades, the detonating powder improves detonation, but flows poorly, and bridge phenomenon occurs. In addition, since the dust was severe during manufacturing and workability was a problem, it was not possible to use Grade 2 as a medicine.

In the present invention, while using a second grade drug to improve the detonation, to solve the above problems was manufactured in the following new manufacturing process as described in more detail according to the drawings as follows.

Conventionally, as shown in FIG. 2, since the use of four grades of granules having a large particle size does not cause problems such as flowability, accordingly, the composition of the syrup (8) → drying (10) → filling (11) → coating (7). Proceeded to the process of. However, in the present invention, because the use of the second grade of the small particle size granules, the assembly process is added to prevent the improvement of the flow chart and other problems, so that the composite composition (8) → assembly (9) → drying (10) → medicine and It is produced by the process of roll crushing crushing (11) → coating (7).

To explain this in detail, a second-grade gunpowder is synthesized (8), and a binder (Binder) is added and mixed, and the binder is processed with waxy corn, which is preferably made of low-grade amylose (containing most amylopectin) starch. It is put into a granulator so that the flow rate is the same as that of the fourth grade, and granulated by granulation (9) and then dried (10).

The granulated powder is poured into the deep powder, pulverized with a roll crush and rolled back to the second grade.

The minimum detonation dose test of the dopant produced by the manufacturing method of the present invention is as follows.

Example 1

The explosive test was carried out after varying the amount of cardiac medicine in the method of the present invention, the results are shown in Table 2.

Using the data in Table 2, the minimum detonation dose calculated by the Bruceton Test is 2.88 g / m, which means that a product of 2.88 g / m has a probability of 99.999975%.

Example 2

When the different doses of the dopant produced by the present invention is tested by the different doses of cardiac doses, it is shown in Table 3.

The test results shown in Table 3 show that the average speed was reduced by about 1,200m / sec.

In other words, the production of the doppler by the method of the present invention is an effective invention that can reduce the amount of cardiac medicine from 10.26g / m to 2.88g / m while having the same detonation capacity.

Claims (3)

In known dopants manufactured by screening and PETN (Penta Erythrite Tetra Nitrate) based medicines in plastic tape, covering them three times with coated yarns, and then plastic coating again, using binders using grade 2 as a medicine. After mixing, granulate the granules into a grade 4 standard with a granulator, assemble them into a plastic tape, crush them with a roll crush, and make a grade 2 standard. The method for producing a low-dose tracer according to claim 1, wherein waxy maize is processed into a low component amylose starch as a binder. The method for producing a low-dose drug carrier according to claim 1, wherein at least 2.88 g / m of the assembled deepening agent is used.