CN1101906A - Lead chromate-manganese dioxide-silicon series of delaying explosive - Google Patents

Abstract

The delaying explosive series is prepared with lead chromate, manganese dioxide, silicon, incendiary agent and flame retardant through mixing and granulating. Various delaying explosives with different precise (ms) for electric detonator are prepared by changing the ratio of the components. Its advantages include good ignition nature, no need of high-energy or enhanced auxiliary ignition and low cost.

Description

Lead chromate-manganese dioxide-silicon series of delaying explosive

The present invention relates to promptly high section of a kind of initiating equipment or the high delay powder that second, the amount millisecond delay electric detonator was used that engineering explosion is used.

It is of a great variety to produce the used delay powder of delay detonator at present both at home and abroad, is mainly the other delay compositions for blasting cap of low section.Though it is also a lot of to be used for the low burning rate delay powder of other, high second amount millisecond delay electric detonator of high section, as relevant patent USP3701697(1972); USP3726730(1973); HP151622; FP1587420; BP628247(1949); BP982460(1965); FP1359245(1964); BP2089336(1982); USP4419154(1983) but can only be used for the powder charge of imperial palace pipe, flame sensitivity is low, and critical burning diameter gas volume big or that burning produces is bigger, is unsuitable for the powder charge of lead pipe extension part.Though indivedual delay powders can be used for the powder charge of lead pipe extension part, need press-fit high energy, a hot spots gunpowder when being used for the detonator assembling or adopt and strengthen high-energy igniter charge head (common drug head increase be coated with 1-2) outward all over high-energy igniter charge as red lead-silicon-antimony sulfide series delay powder draw Cheng Zhonggao section extension body, its structure and processing condition are all complicated, and the mechanical sensitivity of high-energy igniter charge is all very high, is prone to the dangerous phenomenon of burning or detonation in the production process.And used part material not only is difficult to buy on costliness but also the market mostly in the high section of the imperial palace tubular type low burning rate delay powder, as serial delay powders such as tungstenic, zirconium, manganese, titaniums.

Along with the initiating equipment industrial expansion, for the manufacturing cost that reduces the metal casing delay electric detonator with improve the quality of products, just progressively replace imperial palace pipe powder charge formula extension part to produce millisecond delay electric detonator from the seventies abroad with lead pipe medicine core extension part.China applies multicore lead pipe formula extension part millisecond delay electric detonator since the beginning of the eighties.Metal casing delay electric detonator cancellation at end of the eighties imperial palace pipe directly assembles with lead pipe extension part, thereby greatly reduces cost.Because of existing various low burning rate delay powders are unsuitable for the powder charge of the high section of lead pipe formula electrical detonator, many producers and R﹠D institution are all endeavouring to study a kind of other delay powder of high section that can be applicable to the lead pipe powder charge both at home and abroad at present.

The present invention solves the delay powder that the other delay electric detonator extension part of the high section of lead pipe formula is used, and high section not, extension of high-precision electrical detonator structure and problems such as manufacturing process complexity, cost height.

Lead chromate of the present invention-manganese dioxide-silicon series delay powder is to realize like this, its main component is that lead chromate, two kinds of oxygenants of Manganse Dioxide and incendiary material silicon mixing granulation form the stage casing delay powder, adjusts the lead pipe extension part that the each component proportioning can obtain 150-450ns extension scope.The oxide compound or superoxide one or two or more kinds oxygenant or Extra Section high-energy combustion agent such as aluminium, the magnesium powder etc. wherein that add other oxygenant such as perchlorate, oxymuriate, red lead, lead peroxide, barium peroxide, chromium, molybdenum in last genus component improve combustion speed to obtain can be made into not (15-150ns) millisecond lead pipe extension part of low section.

In the component that with lead chromate, Manganse Dioxide, silicon is basic medicine, add one or more incendiary material wherein such as other incendiary material such as titanium, ferrosilicon, sulphur, antimony sulfide, plumbous rhodanate, graphite, tungsten, reduce its combustion speed with high section (450-800ns) millisecond lead pipe extension part in obtaining to can be made into.In last genus delay powder, add wherein one or more of delayer such as Calcium Fluoride (Fluorspan), Sodium Fluoride, aluminum fluoride, Potassium monofluoride, silicon bath soil, talcum powder and other inert substance and all can reduce its combustion speed significantly, to obtain can be made into high section and high second amount (800-2000ns) millisecond lead pipe extension part.

In sum, key of the present invention is to contain lead chromate, Manganse Dioxide, the delay powder of three kinds of materials of silicon and the series of formation thereof simultaneously.

Preferred plan of the present invention is with lead chromate 45%, and Manganse Dioxide 30%, 25% 3 kind of composition of silicon are basic medicine, adds other composition adjustment combustion speed.

Example 1, lead chromate 45%, Manganse Dioxide 30%, silicon 25% mixing granulation become three core lead pipes with lead pipe powder charge tube drawing, assembling and draw, and length is cut in the segmentation adjustment in the 7-16mm scope, can be assembled into 6-10 section delay electric detonator.As cut long during for 7mm, 50 average second amount 152ns, extreme difference 17ns; When cutting long 16.4mm, 50 average second amount 381ns, extreme difference 19ns.

Example 2, in last genus is formed, add other incendiary material 7g in every 100g base medicine and become five core lead pipes, cut long 17.5mm and be assembled into 50 of the other delay electric detonators of high section, average second amount 1483ns of test, tolerance 96ns with delayer 5g draw.

Lead chromate of the present invention-manganese dioxide-silicon series delay powder ignition characteristic is good, flameholding, systematic error are little, does not need additional any ignition element assembly or high-energy igniter charge, and common igniting head both can ignite.Not only be suitable for the powder charge of imperial palace pipe but also be applicable to the lead pipe powder charge, and can pull out Cheng Danxin or multicore lead pipe.Increase other composition such as oxygenant, incendiary material and delayer etc. and adjust its component proportioning and can satisfy the used delay powder of the high other detonator 1-20 section of section in basic medicine, 1-30 section extension of high-precision electrical detonator, hundred milliseconds be delay electric detonator and the 1/4 second delay powder of required usefulness such as delay electric detonator uniformly-spaced uniformly-spaced.It is various that the cost of material is low and easily purchase (all available on the market).It is simple to be used for its structure of delay electric detonator and manufacturing process, is used for present imperial palace tubular type or lead pipe formula delay electric detonator, and production technique need not to improve, and is applicable to mass industrialized production.

Claims (6)

1, lead chromate-manganese dioxide-silicon series delay powder is to be suitable for the used a kind of novel delay powder of the high other electrical detonator of section of imperial palace pipe or lead pipe powder charge formula, it is characterized in that delay powder is to be formed with incendiary material silicon mixing granulation or added other or needed each section delay powders of high precision electrical detonator of satisfied high section that other oxygenant, incendiary material, delayer are made different combustion speed with it for basic medicine by lead chromate, two kinds of oxygenants of Manganse Dioxide.

2,, it is characterized in that delay powder is made up of lead chromate, Manganse Dioxide, silicon or be the delay powder of basic medicine with it according under the claim 1.

3, according under the claim 1, it is characterized in that with lead chromate, Manganse Dioxide, silicon be major ingredient, add the oxide compound or the superoxide of other oxygenant such as perchlorate or oxymuriate or lead or barium.

4,, it is characterized in that with lead chromate, Manganse Dioxide, silicon being that fundamental component adds other incendiary material such as ferrosilicon or antimony sulfide or plumbous rhodanate or selenium or graphite one or more incendiary material wherein according under the claim 1.

5,, it is characterized in that with lead chromate, Manganse Dioxide, silicon be fluorochemical or diatomite or talcum powder and other inert substance that major ingredient adds delayer such as aluminium or sodium or potassium or calcium according under the claim 1.

6,, it is characterized in that containing simultaneously the delay powder of lead chromate, Manganse Dioxide, three kinds of materials of silicon according under the claim 1.