CN100357235C - TNT-free powdered modified ammonium nitrate-fuel oil explosive and preparation process thereof - Google Patents

TNT-free powdered modified ammonium nitrate-fuel oil explosive and preparation process thereof Download PDF

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Publication number
CN100357235C
CN100357235C CNB2006100395374A CN200610039537A CN100357235C CN 100357235 C CN100357235 C CN 100357235C CN B2006100395374 A CNB2006100395374 A CN B2006100395374A CN 200610039537 A CN200610039537 A CN 200610039537A CN 100357235 C CN100357235 C CN 100357235C
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China
Prior art keywords
ammonium nitrate
mixture
explosive
tnt
fuel oil
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Expired - Fee Related
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CNB2006100395374A
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CN1837165A (en
Inventor
姚普华
刘世坤
江涌涛
王自军
吕兴华
李永新
张福炀
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Ma'anshan Jiangnan Chemical Co ltd
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ANHUI DUN'AN CHEMICAL INDUSTRY GROUP Co Ltd
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Abstract

The present invention discloses a TNT-free powdery modified ammonium nitrate fuel oil explosive and the preparation method thereof. The present invention is composed of 87 to 95 wt% of ammonium nitrate, 0 to 5 wt% of auxiliary oxidizer salt, 3 to 8 wt% of combustible agent, 0.1 to 1.0 wt% of cementing agent and 0.03 to 0.5 wt% of cross linking agent. The present invention has the preparation technology that a mixture of the ammonium nitrate, the auxiliary oxidant salt and the water is heated up to 100 to 135 DEG C to form an aqueous phase, and the cementing agent is added and stirred. The combustible agent, namely an oil phase is heated up to 90 to 120 DEG C.After the aqueous phase and the oil phase are mixed, the cross linking agent is added to form a pulpy mixture which is atomized into powder by an air blast nozzle. The explosive properties of the TNT-free powdery modified ammonium nitrate fuel oil explosive prepared by the present invention are higher than that of the present modified ammonium nitrate fuel oil explosive. Compared with a powdery emulsion explosive, the present invention has the advantages of low cost, little energy consumption and high safety.

Description

TNT-free powdered modified ammonium nitrate-fuel oil explosive and preparation method thereof
Technical field
The present invention relates to a kind of ammonium nitrate-fuel oil mixture and preparation method thereof, particularly relate to a kind of TNT-free powdered modified ammonium nitrate-fuel oil explosive and preparation method thereof.Can be used for the quick-fried industry explosive production of people producer and be used to produce TNT-free powdered modified ammonium nitrate-fuel oil explosive, this explosive can be extensive use of in engineering explosion.
Background technology
Powder ammonium nitrate explosive is the industrial explosive kind of present usage quantity maximum, mainly contains an-tnt explosive and ammonium nitrate-fuel oil mixture two macrospecies.Generally speaking, an-tnt explosive contains high explosive sensitizing agent tritonal, and its blast performance is better than ammonium oils explosive, but tritonal is toxic substance, and is harmful, and the cost height.Ammonium oils explosive cost is low, and production technique is simple, but blast performance is poor, and easily oil impregnate is rotten, and storge quality is poor.Above-mentioned both equal easy moisture absorptions cakings, water repelling property difference and because explosion velocity is low can not satisfy the requirement of the broken engineering of the big ore deposit rock burst of hardness.
The solid-state ammonium nitrate of the most employing of common powdery ammonium nitrate-fuel oil or ammonium nitrate-fuel oil mixture and modified ammonium nitrate-fuel oil explosive mixes with liquid oil phase, this hybrid mode is difficult to oxygenant is uniformly dispersed with combustible agent and fully contact, thereby the prepared explosive detonation degree that reacts completely is limited, and blast performance is difficult to improve.
Chinese patent CN1057639A discloses a kind of " powdery anfo explosive with high dispersivity ", it adopts emulsifying manner to prepare the oil-in-water milk sap of aqueous ammonium nitrate solution and combustible agent oil, mineral oil is dispersed in the aqueous ammonium nitrate solution, rolls drying by wheel roller then, mix with wood powder again.The advantage of this explosive is not contain tritonal, has improved the blast performance of ammonium nitrate-fuel oil mixture, but has following problem: (1) water external emulsion instability, easily layering, particularly in the rolling process, the easy crystallization of ammonium nitrate, oxygenant and combustible agent mix inhomogeneous, have influenced detonation property.(2) wheel roller mix to belong to discontinuous manner, can not serialization production, and the rolling composite grain is thicker, and storge quality is not good.This method does not obtain promoting after application always.
In order to overcome the shortcoming of above-mentioned explosive, Chinese patent CN1027637C discloses a kind of powdery emulsifying explosive and preparation method thereof, this technology has not only kept the advantage of high degree of dispersion ammonium nitrate-fuel oil mixture, and it is little to have kept the emulsion explosive particle, ammonium nitrate contacts very advantage of uniform with combustible agent, detonation property obviously improves and water resisting property, storage characteristics is also better, but this technical requirements adopts emulsify at a high speed to mix, and there is certain potential safety hazard in emulsifying base detonation sensitivity height, in addition, emulsifying base is done thick, makes the spraying drying energy consumption very high, simultaneously, will adopt special oil phase material and emulsifying agent in the prescription, the explosive cost is higher.
Summary of the invention
Purpose of the present invention is exactly at the above-mentioned defective that exists in the prior art, and provides a kind of blast performance suitable with powdery emulsifying explosive, but the TNT-free powdered modified ammonium nitrate-fuel oil explosive that production cost is lower, production process is safer, energy consumption obviously reduces.
Another object of the present invention provides the preparation method of above-mentioned TNT-free powdered modified ammonium nitrate-fuel oil explosive.
For realizing the present invention's purpose, TNT-free powdered modified ammonium nitrate-fuel oil explosive of the present invention is achieved through the following technical solutions.
The component of TNT-free powdered modified ammonium nitrate-fuel oil explosive of the present invention comprises ammonium nitrate, secondary oxidizer salt, combustible agent, jointing compound, linking agent, and each component content (weight) scope is:
Ammonium nitrate 87%-95%;
Secondary oxidizer salt 0-5%;
Combustible agent 3%-8%;
Jointing compound 0.1%-1.0%;
Linking agent 0.03%-0.5%.
Described secondary oxidizer salt is saltpetre, SODIUMNITRATE, nitrocalcite and their mixture; Combustible agent can be compound wax, paraffin, machine oil and their mixture; Jointing compound can be any or its mixture in sesbania gum, locust bean gum, the guar gum; Linking agent can be a kind of or mixture in potassium bichromate, the borax.
The preparation method of TNT-free powdered modified ammonium nitrate-fuel oil explosive of the present invention is:
The mixture that ammonium nitrate, water or ammonium nitrate, secondary oxidizer salt, water are formed is warmed up to 100~135 ℃, forms water; In water-phase material, add jointing compound, stir; With combustible agent is that oil phase heats to 90~120 ℃; The water and the oil phase of preparation are mixed stirring; Linking agent is joined in the mixture of oil phase and water, form paste mixture; The above-mentioned mixture that obtains is become powder through the pneumatic atomizer nozzle atomization, directly make the TNT-free powdered modified ammonium nitrate-fuel oil explosive finished product.
Described pneumatic atomizer can be two streamings, three streamings or multi-flow.
It is good in the 0.3m/s-8m/s scope that above-mentioned water and oil phase mix the stirring linear velocity.
The add-on of water is the 3%-12% of each component gross weight of the present invention in the preparation process.The water ratio of the finished product TNT-free powdered modified ammonium nitrate-fuel oil explosive of the present invention is greatly about about 0.5%.
Principle of the present invention is oxygenant to be mixed in liquid state with combustible agent fully contact evenly, improves the contact area of oxygenant and combustible agent, improves reactivity, and the mixture of this abundant contact is spray-dried, is prepared into very tiny particle with comminution by gas stream.
The present invention compared with prior art, its distinguishing feature is:
(1) adopted low speed mixing or emulsifying technology, production process is safer;
(2) oxygenant and combustible agent adopt liquid-phase mixing, the rate that reacts completely height, blast performance index height;
(3) the pulpous state structure is very beneficial for spraying drying, is easy to remove moisture content, has improved spray-dired efficient, has reduced energy consumption, can reduce by 50% by the loss-rate powdery emulsifying explosive;
(4) adopt common compound wax etc. just can meet the demands, the starting material wide material sources do not add emulsifying agent, greatly reduce the explosive cost.Material cost descends 300 yuan/ton than powdery emulsifying explosive.
(5) explosive does not contain tritonal, and having realized does not have ladderization production, helps environmental protection.
Embodiment
For further describing the present invention, TNT-free powdered modified ammonium nitrate-fuel oil explosive of the present invention and preparation method thereof is further described below in conjunction with embodiment.
According to the table 1 preparation powdered modified ammonium nitrate-fuel oil mixture 100kg of powdered TNT-free (according to dry basis).
Table 1 TNT-free powdered modified ammonium nitrate-fuel oil explosive component and weight (kg)
Embodiment Ammonium nitrate SODIUMNITRATE (potassium or calcium) Water Compound sodium or paraffin Machine oil or diesel oil Sesbania gum Guar gum Locust bean gum Potassium bichromate Borax
1 91.5 8 7 1.0 0.5
2 91.5 9 8 0.47 0.03
3 94.0 7.5 5 0.8 0.2
4 94 7.5 5 0.8 0.2
5 90.5 3 7.5 5 0.5 0.8 0.2
6 94 7.5 5 0.7 0.1 0.2
7 94.4 7.5 5 0.5 0.1
8 87 5 6 7 0.7 0.1 0.1 0.1
9 95 1 10 3 0.8 0.2
Annotate: because water is removed after drying, the ratio of water is for adding in the prescription, and all the other components amount to 100%.
Embodiment 1-6 operation steps is:
The first step, the mixture that ammonium nitrate, water or ammonium nitrate, secondary oxidizer salt, water are formed is warmed up to 130 ℃, forms water;
Second step added jointing compound in water-phase material, stir;
In the 3rd step, compound wax, stone sodium, machine oil are heated to 110 ℃;
The 4th step, the water and the oil phase mixing of preparation are stirred, stir linear velocity 5m/s;
In the 5th step, linking agent is added in the mixture of oil phase and water;
The 6th step became powder with the above-mentioned mixture that obtains through three gas streaming nozzle atomizations, directly made the TNT-free powdered modified ammonium nitrate-fuel oil explosive finished product.
After testing and store, record every index such as table 2.
The powdered modified ammonium nitrate-fuel oil mixture index of table 2 powdered TNT-free
Index Embodiment Specification Initial index 1 month 2 months 3 months 4 months 5 months 6 months
Power (ml) 1 32 325 / / / / / /
2 324 / / / / / /
3 340 / / / / / /
4 335 / / / / / /
5 339 / / / / / /
6 329 / / / / / /
7 339 / / / / / /
8 325
9 330
Explosion velocity (m/s) 1 32 3588 3590 3560 3508 3425 3410 3401
2 3498 3490 3477 3456 3421 3405 3398
3 4123 4106 4089 4059 4028 4002 3958
4 4235 4215 4150 4129 4110 4006 3988
5 4222 4215 4168 4109 4089 3989 3978
6 3689 3658 3615 3520 3509 3488 3476
7 4126 4122 4106 3998 3987 3879 3809
8 3450 3405 3396 3369 3390 3356 3321
9 3560 3521 3498 3406 3398 3378 3362
Induced detonation (cm) 1 32 8 7 7 7 6 6 5
2 9 8 8 7 6 6 5
3 9 8 7 6 5 5 5
4 9 8 7 7 5 5 5
5 8 8 7 7 6 6 5
6 8 7 7 7 6 6 5
7 9 8 8 6 6 5 5
8 7 7 6 6 6 5 5
9 8 8 7 7 7 6 6
Brisance (mm) 1 32 15.45 15.28 15.184 15.0 14.26 14.00 13.98
2 15.21 15.06 14.96 14.59 14.28 14.15 14.03
3 15.98 15.56 15.46 14.76 14.58 14.44 14.20
4 16.01 15.88 15.30 15.20 14.72 14.68 14.32
5 16.2 15.95 15.87 15.63 15.78 15.60 15.20
6 15.21 15.07 15.01 14.85 14.72 14.51 14.23
7 15.79 15.68 15.55 15.26 15.18 14.98 15.01
8 14.89 14.65 14.23 14.25 13.98 13.95 13.65
9 15.68 15.45 15.36 15.08 14.95 14.68 14.46
The first step of embodiment 7 is warmed up to 135 ℃, and the 3rd step was warmed up to 90 ℃, and other step is identical with condition.
The first step of embodiment 8, embodiment 9 is warmed up to 100 ℃, and the 3rd step was warmed up to 120 ℃, and other step is identical with condition.

Claims (3)

1. TNT-free powdered modified ammonium nitrate-fuel oil explosive is characterized in that comprising: ammonium nitrate, secondary oxidizer salt, combustible agent, jointing compound, linking agent, and each component content (weight) scope is:
Ammonium nitrate 87%-95%;
Secondary oxidizer salt 0-5%;
Combustible agent 3%-8%;
Jointing compound 0.1%-1.0%;
Linking agent 0.03%-0.5%;
Described secondary oxidizer salt is saltpetre, SODIUMNITRATE, nitrocalcite and their mixture; Described combustible agent is compound wax, paraffin, machine oil and their mixture; Described jointing compound is any or its mixture in sesbania gum, locust bean gum, the guar gum; Described linking agent is a kind of or mixture in potassium bichromate, the borax.
2. the preparation method of TNT-free powdered modified ammonium nitrate-fuel oil explosive as claimed in claim 1 is characterized in that according to following technology: the mixture of ammonium nitrate, water or ammonium nitrate, secondary oxidizer salt, water composition is warmed up to 100~135 ℃, forms water; In water-phase material, add jointing compound, stir; With combustible agent is that oil phase heats to 90~120 ℃; The water and the oil phase of preparation are mixed stirring; Linking agent is joined in the mixture of oil phase and water, form paste mixture; The above-mentioned mixture that obtains is become powder through the pneumatic atomizer nozzle atomization, directly make the TNT-free powdered modified ammonium nitrate-fuel oil explosive finished product.
3. the preparation method of TNT-free powdered modified ammonium nitrate-fuel oil explosive as claimed in claim 2 is characterized in that: described water and oil phase mix and stir linear velocity in the 0.3m/s-8m/s scope.
CNB2006100395374A 2006-04-14 2006-04-14 TNT-free powdered modified ammonium nitrate-fuel oil explosive and preparation process thereof Expired - Fee Related CN100357235C (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114163285A (en) * 2020-09-10 2022-03-11 中国石化扬子石油化工有限公司 Emulsion explosive

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188489A (en) * 1981-05-12 1982-11-19 Nippon Oils & Fats Co Ltd Water-in-oil emulsion explosive composition
CN1032000A (en) * 1987-09-14 1989-03-29 阜新矿务局十二厂 Water gel explosives for mine
CN1128743A (en) * 1995-02-06 1996-08-14 南京理工大学 Slurry explosive and mfg. method thereof
JP2001089285A (en) * 1999-09-28 2001-04-03 Asahi Kasei Corp Granular explosive
EP1087919A1 (en) * 1998-06-05 2001-04-04 Snpe Gas-generating solid pyrotechnic loads based on compositions containing water

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188489A (en) * 1981-05-12 1982-11-19 Nippon Oils & Fats Co Ltd Water-in-oil emulsion explosive composition
CN1032000A (en) * 1987-09-14 1989-03-29 阜新矿务局十二厂 Water gel explosives for mine
CN1128743A (en) * 1995-02-06 1996-08-14 南京理工大学 Slurry explosive and mfg. method thereof
EP1087919A1 (en) * 1998-06-05 2001-04-04 Snpe Gas-generating solid pyrotechnic loads based on compositions containing water
JP2001089285A (en) * 1999-09-28 2001-04-03 Asahi Kasei Corp Granular explosive

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Effective date of registration: 20160812

Address after: 243031 rain Town, Ma'anshan City, Anhui Province

Patentee after: Ma'anshan Jiangnan Chemical Co.,Ltd.

Address before: 243100 Anhui province Dangtu County Department provided Road No. 10

Patentee before: Anhui Dun'an Chemical Industry Group Co.,Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20071226