Safe type civil propellant and preparation method thereof

A propellant and safe technology, which is applied in the field of safe civil propellant and its preparation, can solve the problems of complex manufacturing method and large dust, and achieve good fracturing effect, good safety performance and low content of corrosive gas components Effect

Inactive Publication Date: 2018-11-06
HUBEI INST OF AEROSPACE CHEMOTECH
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AI-Extracted Technical Summary

Problems solved by technology

[0008] The manufacturing methods of most existing civil propellants are relatively complicated, and the binders in most formulations need to be dissolved with solvents, a...
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Abstract

A safe type civil propellant is prepared from, by mass, 2%-8% of coating agent, 40%-60% of main oxidizing agent, 0%-25% of auxiliary oxidant, 25%-40% of fuel and 1%-2% of combustion catalyst, whereinthe coating agent contains liquid rubber and grease. The friction sensitivity and impact sensitivity of the propellant are 0, and the electrostatic spark sensitivity is greater than 120 mJ, excluding1.1-level explosive materials, the danger level is 1.3 level, and because that no metal powder is contained in a formula, and reaction products do not likely ignite oil, gas and coal bed methane and are safe and reliable. The explosion heat of the civil propellant is greater than 4400 J/g, and the gas production is greater than 2.8 mol/100g, can be ignited by electric ignition heads, electric igniters and other civil pyrotechnic equipment, the gases generated by the reaction are mainly nitrogen, carbon dioxide and water steam, the content of CO and nitrogen oxide is very low, and the safe typecivil propellant can be used for oil and shale gas mining and coal mine fracturing.

Application Domain

Inorganic oxygen-halogen salt explosive compositionsPressure gas generation

Technology Topic

Shale gasCarbon dioxide +19

Examples

  • Experimental program(5)

Example Embodiment

[0032] Example 1
[0033] A safe civil propellant whose formula composition (calculated by mass percentage) is as follows: coating agent: HTPB, 2%, DOA, 2%; oxidizer: KP, 58%; fuel: GN: 32%, ADC, 5 %; combustion catalyst: CuO, 1%, d 50 = 2μm.
[0034] The preparation method is as follows:
[0035] (1) Weigh according to the formula ratio, then add HTPB, DOA, GN, ADC to the vertical mixer for mixing, mixing temperature 50℃, mixing time 15min;
[0036] (2) Add 1/2 of the oxidant KP and 1/2CuO into the vertical mixer, mix for 10 minutes, and then obtain the powder;
[0037] (3) Add the powder of (2) together with the remaining KP and CuO into the three-dimensional motion mixer and mix for 10 minutes. After the mixing is completed, the material is discharged to obtain the propellant.
[0038] The gas production of the propellant obtained is 2.87mol/100g, the explosion heat is 4512J/g; the content of CO is 0mol/100g, the content of NO is 0.02mol/100g, NO 2 The content is 0mol/100g. According to GJB6195-2008 "Composite Solid Propellant Hazard Level Classification Method", the hazard level of this civil propellant belongs to 1.3.

Example Embodiment

[0039] Example 2
[0040] A safe civil propellant whose formula composition (calculated by mass percentage) is as follows: coating agent: HTPB, 2.5%, TA, 2.5%; oxidizer: KP, 49%, AN, 5%; fuel: DHG, 40 %; combustion catalyst: CuO, 1%, d 50 = 2μm.
[0041] The preparation method is as follows:
[0042] (1) Weigh according to the formula ratio;
[0043] (2) Then add HTPB, TA and DHG to the screw mixer at the first-level feeding port, AN from the second-level feeding port, and KP and CuO from the third-level feeding port for mixing; mix for 20 minutes to obtain the propellant.
[0044] The gas production of the propellant obtained is 3.06mol/100g; the explosion heat is 4486J/g; the content of CO is 0mol/100g, the content of NO is 0.019mol/100g, NO 2 The content is 0mol/100g. According to GJB6195-2008 "Composite Solid Propellant Hazard Level Classification Method", the hazard level of this civil propellant belongs to 1.3.

Example Embodiment

[0045] Example 3
[0046] A safe civil propellant, its formula composition (calculated by mass percentage) is as follows: coating agent: HTPB, 2%, DOS, 2%; oxidant: KP, 45%, AP, 2%, AN, 13%; Fuel: GN: 26%, melamine: 9%; combustion catalyst: Fe 2 O 3 , 1%, d 50 =2.2μm.
[0047] The preparation method is as follows:
[0048] (1) Weigh according to the formula ratio, and then add HTPB, DOS, GN, and melamine to a vertical mixer for mixing. The mixing temperature is 50°C and the mixing time is 10 minutes;
[0049] (2) Add the auxiliary oxidants AN and AP to the mixer and mix for 10 minutes;
[0050] (3) 1/4 of the main oxidant KP, 1/2Fe 2 O 3 Add to the mixer and mix for 12 minutes; then get the powder;
[0051] (4) Combine the powder of (3) with the remaining KP, Fe 2 O 3 Add them to the three-dimensional motion mixer and mix for 10 minutes. After the mixing is completed, the material is discharged to obtain the propellant.
[0052] The gas production of the propellant obtained is 2.94mol/100g; the explosion heat is 4490J/g; the content of CO is 0mol/100g, the content of NO is 0.02mol/100g, NO 2 The content of is 0; According to GJB6195-2008 "Composite Solid Propellant Hazard Level Classification Method", the hazard level of the civil propellant belongs to 1.3.
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PUM

PropertyMeasurementUnit
Hot4512.0J/g
Hot4490.0J/g
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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