Smoking agent for starting cartridge and preparation method thereof

Abstract

The invention provides a smoke agent for a starting cartridge. The smoke agent comprises 40 wt% of lead tetraoxide; 10 wt%-30 wt% of a strong oxidant; 25 wt%-35 wt% of silicon carbon powder; 8 wt%-10 wt% of a combustion agent; 0.5 wt% to 1.5 wt% of an adhesive; the strong oxidant is ammonium nitrate or barium nitrate. Compared with the prior art, the smoke agent for the starting cartridge has the advantages that specific components with specific contents are adopted, overall good interaction is achieved, on the basis that the obtained smoke agent for the starting cartridge meets various use requirements, potassium chlorate which is prone to being affected with damp is prevented from being used, the free-running property is good, and meanwhile the situation that the explosive loading amount of the smoke agent is not uniform is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of smoke generating agents, and more particularly to a smoke generating agent for starting bombs and a preparation method thereof. Background Art

[0002] At present, in the existing formula of smoke agents for starting bombs, potassium chlorate is a highly sensitive explosive agent. It is an inorganic compound with the chemical formula KClO3 and has strong oxidizing properties. However, potassium chlorate easily absorbs moisture in the air and clumps into agglomerates, thereby affecting the fluidity of the smoke agent. At the same time, the existing smoke agents for starting bombs are usually mixed with potassium chlorate powder and other formula powders. The fluidity of the powder in the equipment container (an important parameter for measuring the solid flowability of the powder) is poor, which easily causes uneven dosage of the smoke agent in the product. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a smoke agent for starting bombs and a preparation method thereof. The smoke agent for starting bombs provided by the present invention does not use potassium chlorate which is easily susceptible to moisture, has good fluidity, and avoids the situation of uneven smoke agent charging amount.

[0004] The present invention provides a smoke agent for a starting bomb, comprising:

[0005] Lead tetraoxide 40wt%;

[0006] Strong oxidant 10wt% to 30wt%;

[0007] Silicon carbon powder 25wt%~35wt%;

[0008] Combustion agent 8wt%~10wt%;

[0009] Adhesive 0.5wt%~1.5wt%;

[0010] The strong oxidant is ammonium nitrate or barium nitrate.

[0011] Preferably, the purity of the lead tetroxide is greater than or equal to 99%, and the particle diameter is 80 mesh to 120 mesh.

[0012] Preferably, the purity of the strong oxidant is greater than or equal to 99%, and the pH value is 4-7.

[0013] Preferably, the density of the silicon carbon powder is 2g / cm 3 ~3g / cm 3 , purity is greater than or equal to 60%, and particle diameter is 80 mesh to 120 mesh.

[0014] Preferably, the combustion agent is selected from double nail propellant and / or 125 propellant;

[0015] The particle diameter of the combustion agent is 250 meshes to 350 meshes.

[0016] Preferably, the adhesive is shellac.

[0017] The present invention also provides a method for preparing the smoke agent for the starting bomb described in the above technical solution, comprising the following steps:

[0018] a) mixing a binder with ethanol to obtain a binder solution;

[0019] b) mixing the binder solution obtained in step a) with lead tetroxide, a strong oxidant and silicon-carbon powder to obtain a mixed material;

[0020] c) granulating and drying the mixed material obtained in step b) in sequence to obtain smoke particles; and then mixing the smoke particles with a combustion agent to obtain a smoke agent for a starting bomb.

[0021] Preferably, in step a), the mass ratio of the binder to ethanol is 1:(4-6).

[0022] Preferably, the mixing process in step b) is specifically as follows:

[0023] After stirring trilead tetroxide, strong oxidant and silicon carbon powder in a mixer at 20℃~30℃ and 20r / min~40r / min for 1min~10min, add the binder solution and continue stirring for 5min~15min to obtain a paste-like mixture.

[0024] Preferably, the particle size of the granulation in step c) is 1 mm to 2 mm;

[0025] The drying process is carried out at a temperature of 18° C. to 35° C., a relative humidity of ≤70%, and a drying time of 20 h to 30 h.

[0026] The present invention provides a smoke agent for a starting bomb, comprising: 40wt% of lead tetroxide; 10wt% to 30wt% of a strong oxidant; 25wt% to 35wt% of silicon carbon powder; 8wt% to 10wt% of a combustion agent; 0.5wt% to 1.5wt% of a binder; the strong oxidant is ammonium nitrate or barium nitrate. Compared with the prior art, the smoke agent for a starting bomb provided by the present invention adopts a specific component with a specific content to achieve a better overall interaction. The obtained smoke agent for a starting bomb avoids the use of potassium chlorate that is easily affected by moisture on the basis of meeting various use requirements, has good fluidity, and avoids the situation of uneven smoke agent charge.

[0027] In addition, the preparation method provided by the present invention has a simple process, mild and easy-to-control conditions, and the raw materials are readily available and low in cost, and has broad application prospects. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The present invention provides a smoke agent for a starting bomb, comprising:

[0030] Lead tetraoxide 40wt%;

[0031] Strong oxidant 10wt% to 30wt%;

[0032] Silicon carbon powder 25wt%~35wt%;

[0033] Combustion agent 8wt%~10wt%;

[0034] Adhesive 0.5wt%~1.5wt%;

[0035] The strong oxidant is ammonium nitrate or barium nitrate.

[0036] In the present invention, the smoke agent for starting bombs includes lead tetroxide, a strong oxidant, silicon carbon powder, a combustion agent and a binder, preferably consisting of lead tetroxide, a strong oxidant, silicon carbon powder, a combustion agent and a binder.

[0037] In the present invention, the purity of the lead tetroxide is preferably greater than or equal to 99%, and the particle diameter is preferably 80 mesh to 120 mesh. The present invention has no special restrictions on the source of the lead tetroxide, and commercial products known to those skilled in the art can be used.

[0038] In the present invention, the smoke agent for the starting bomb includes 40wt% of lead tetroxide.

[0039] In the present invention, the strong oxidant is ammonium nitrate or barium nitrate, preferably ammonium nitrate; ammonium nitrate provides oxygen during the combustion process. In the present invention, the purity of the strong oxidant is preferably greater than or equal to 99%, and the pH value is preferably 4 to 7. The present invention has no special restrictions on the source of the strong oxidant, and commercially available products known to those skilled in the art can be used.

[0040] In the present invention, the smoke generator for the starting bomb includes 10wt% to 30wt% of a strong oxidant, preferably 20wt%.

[0041] In the present invention, the silicon-carbon powder and lead tetraoxide are combined to produce white smoke during combustion; the density of the silicon-carbon powder is preferably 2g / cm 3 ~3g / cm 3The purity is preferably greater than or equal to 60%, and the particle diameter is preferably 80 mesh to 120 mesh. The present invention has no special restrictions on the source of the silicon-carbon powder, and commercial products known to those skilled in the art can be used.

[0042] In the present invention, the smoke agent for the starting bomb includes 25wt% to 35wt% of silicon carbon powder, preferably 30wt%.

[0043] In the present invention, the incendiary agent is preferably selected from double nail propellant and / or 125 propellant, more preferably double nail propellant; the particle diameter of the incendiary agent is preferably 250 mesh to 350 mesh. In the present invention, the incendiary agent can play a role in supporting combustion during the combustion process. The present invention has no special restrictions on the source of the incendiary agent, and commercially available products well known to those skilled in the art can be used.

[0044] In the present invention, the smoke agent for the starting bomb includes 8wt% to 10wt% of the combustion agent, preferably 9wt%.

[0045] In the present invention, the binder is preferably shellac, which plays a bonding role in the granulation process. The present invention has no special restrictions on the source of the binder, and commercial products well known to those skilled in the art can be used.

[0046] In the present invention, the smoke agent for the starting bomb includes 0.5wt% to 1.5wt% of a binder, preferably 1wt%.

[0047] The smoke agent for starting bombs provided by the present invention adopts specific components with specific contents to achieve overall good interaction: ammonium nitrate, as a strong oxidant, releases oxygen during the combustion of the smoke agent, ensures that lead tetroxide and silicon carbon powder are fully burned and releases white smoke, and at the same time, the double-nail propellant also releases a part of white smoke after combustion and assists combustion; the obtained smoke agent for starting bombs avoids the use of potassium chlorate that is easily affected by moisture on the basis of meeting various use requirements, has good fluidity, and avoids the situation of uneven smoke agent charging amount.

[0048] The present invention also provides a method for preparing the smoke agent for the starting bomb described in the above technical solution, comprising the following steps:

[0049] a) mixing a binder with ethanol to obtain a binder solution;

[0050] b) mixing the binder solution obtained in step a) with lead tetroxide, a strong oxidant and silicon-carbon powder to obtain a mixed material;

[0051] c) granulating and drying the mixed material obtained in step b) in sequence to obtain smoke particles; and then mixing the smoke particles with a combustion agent to obtain a smoke agent for a starting bomb.

[0052] The present invention first mixes the adhesive with ethanol to obtain an adhesive solution. In the present invention, the adhesive is the same as that in the above technical solution, and will not be described in detail herein.

[0053] In the present invention, the mass ratio of the binder to ethanol is preferably 1:(4-6), more preferably 1:5.

[0054] In the present invention, the binder solution plays a bonding role in the granulation process, and the binder remains in the product after granulation and drying, while the ethanol is completely volatilized.

[0055] After obtaining the binder solution, the present invention mixes the obtained binder solution with lead tetroxide, a strong oxidant, and silicon-carbon powder to obtain a mixed material. In the present invention, the lead tetroxide, the strong oxidant, and the silicon-carbon powder are the same as those in the above technical solution, and are not described in detail here.

[0056] In the present invention, the mixing process is preferably specifically as follows:

[0057] After stirring trilead tetroxide, a strong oxidant and silicon carbon powder in a mixer at 20°C to 30°C and 20r / min to 40r / min for 1min to 10min, the binder solution is added and stirred for 5min to 15min to obtain a paste-like mixture;

[0058] More preferably:

[0059] After stirring trilead tetroxide, strong oxidant and silicon carbon powder in a mixer at 20℃~30℃ and 30r / min for 4min~6min, add the binder solution and continue stirring for 8min~12min to obtain a paste-like mixture.

[0060] After obtaining the mixed material, the present invention sequentially granulates and dries the mixed material to obtain smoke particles; and then mixes the smoke particles with a combustion agent to obtain a smoke agent for a starting bomb.

[0061] In the present invention, the combustion agent is the same as that in the above technical solution, and will not be described in detail here.

[0062] In the present invention, the particle size of the granulated particles is preferably 1 mm to 2 mm.

[0063] In the present invention, the drying is preferably carried out in a drying room; the drying temperature is preferably 18° C. to 35° C., the relative humidity is preferably ≤70%, and the drying time is preferably 20 h to 30 h.

[0064] The preparation method provided by the invention has simple process, mild and easy-to-control conditions, and readily available raw materials with low cost, and has broad application prospects.

[0065] The present invention provides a smoke agent for a starting bomb, comprising: 40wt% of lead tetroxide; 10wt% to 30wt% of a strong oxidant; 25wt% to 35wt% of silicon carbon powder; 8wt% to 10wt% of a combustion agent; 0.5wt% to 1.5wt% of a binder; the strong oxidant is ammonium nitrate or barium nitrate. Compared with the prior art, the smoke agent for a starting bomb provided by the present invention adopts a specific component with a specific content to achieve a better overall interaction. The obtained smoke agent for a starting bomb avoids the use of potassium chlorate that is easily affected by moisture on the basis of meeting various use requirements, has good fluidity, and avoids the situation of uneven smoke agent charge.

[0066] In addition, the preparation method provided by the present invention has a simple process, mild and easy-to-control conditions, and the raw materials are readily available and low in cost, and has broad application prospects.

[0067] In order to further illustrate the present invention, the following examples are used for detailed description. The raw materials used in the following examples of the present invention are all commercially available; among them, lead tetroxide powder is provided by Hubei Chengfeng Chemical Co., Ltd., with a purity of 99%, a particle diameter of 100 mesh, a specification of 25 kg, and an industrial grade; silicon carbon powder is provided by Henan Shengchi New Material Technology Co., Ltd., with a density of 2.33 g / cm 3 , purity is 60%, and particle diameter is 100 mesh; ammonium nitrate powder is provided by Hangzhou Longshan Chemical Co., Ltd., with a purity of 99% and a pH value of 4.5-6.0 (25°C, 80.4g / L); double-nail propellant is provided by Shandong Yinguang Group Co., Ltd., with a particle diameter of 300 mesh; shellac is provided by Shanghai Yuanye Biotechnology Co., Ltd. in flaky shellac.

[0068] Example

[0069] (1) Formula: 40% (8kg) of lead tetroxide powder, 20% (4kg) of ammonium nitrate powder, 30% (6kg) of silicon carbon powder, 9% (1.8kg) of double nail propellant, and 1% (0.2kg) of shellac.

[0070] (2) Preparation method:

[0071] ① Mixing and stirring: Pour lead tetroxide powder, ammonium nitrate powder and silicon carbon powder into a blender according to the above formula ratio, stir at 30r / min at room temperature for 5 minutes, then add 1.2kg of shellac liquid (shellac and ethanol are mixed into shellac liquid in a mass ratio of 1:5), continue stirring at 30r / min at room temperature for 10 minutes, and when the mixture changes from dry powder to paste, pour the mixture out of the blender.

[0072] ② Granulation: Pour the batter-like mixture into a granulator to prepare granules with a particle size of 1 to 2 mm.

[0073] ③ Drying: Place the particles on a tray and place the tray in a drying room for 24 hours; the temperature in the drying room is controlled between 18°C ​​and 35°C, and the relative humidity is ≤70%.

[0074] ④ Mixing: Mix granular smoke particles with a particle size of 1 to 2 mm and double-nail propellant with a diameter of 300 mesh to prepare the final smoke agent for the starting bomb.

[0075] Comparative Example

[0076] Commercially available smoke agent for starting bombs: the formula is 30% potassium chlorate, 50% pumpkin powder, 10% lactose, and 10% realgar.

[0077] Various performance tests were conducted on the smoke agents for starting bombs of the embodiments and comparative examples, as shown in the following Tables 1 and 2.

[0078] Table 1

[0079]

[0080]

[0081] Table 2

[0082]

[0083] The test results show that the smoke agent for starting bombs provided by the present invention adopts specific components at specific contents to achieve better overall interaction. The product not only meets the basic use requirements of the smoke agent for starting bombs, but also achieves the purpose of eliminating potassium chlorate that is easily susceptible to moisture, and has good fluidity. At the same time, a granulation step is added in the preparation process of the smoke agent, and the granulated smoke agent falls smoothly in the charging funnel of the equipment, thereby avoiding the situation of uneven charging amount of the smoke agent.

[0084] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A smoke agent for starting bombs, characterized in that: include: Lead tetraoxide 40wt%; Strong oxidant 10wt% to 30wt%; Silicon carbon powder 25wt%~35wt%; Combustion agent 8wt%~10wt%; Adhesive 0.5wt%~1.5wt%; The strong oxidant is ammonium nitrate or barium nitrate.

2. The smoke agent for starting bomb according to claim 1, characterized in that: The purity of the lead tetroxide is greater than or equal to 99%, and the particle diameter is 80 meshes to 120 meshes.

3. The smoke agent for starting bomb according to claim 1, characterized in that: The purity of the strong oxidant is greater than or equal to 99%, and the pH value is 4-7.

4. The smoke agent for starting bomb according to claim 1, characterized in that: The density of the silicon carbon powder is 2g / cm 3 ~3g / cm 3 , purity is greater than or equal to 60%, and particle diameter is 80 mesh to 120 mesh.

5. The smoke agent for starting bomb according to claim 1, characterized in that: The incendiary agent is selected from double nail propellant and / or 125 propellant; The particle diameter of the combustion agent is 250 meshes to 350 meshes.

6. The smoke agent for starting bomb according to claim 1, characterized in that: The adhesive is shellac.

7. A method for preparing a smoke agent for a starting bomb according to any one of claims 1 to 6, characterized in that: The following steps are involved: a) mixing a binder with ethanol to obtain a binder solution; b) mixing the binder solution obtained in step a) with lead tetroxide, a strong oxidant and silicon-carbon powder to obtain a mixed material; c) granulating and drying the mixed material obtained in step b) in sequence to obtain smoke particles; and then mixing the smoke particles with a combustion agent to obtain a smoke agent for a starting bomb.

8. The preparation method according to claim 7, characterized in that: The mass ratio of the binder to ethanol in step a) is 1:(4-6).

9. The preparation method according to claim 7, characterized in that: The mixing process in step b) is specifically as follows: After stirring trilead tetroxide, strong oxidant and silicon carbon powder in a mixer at 20℃~30℃ and 20r / min~40r / min for 1min~10min, add the binder solution and continue stirring for 5min~15min to obtain a paste-like mixture.

10. The preparation method according to claim 7, characterized in that: The particle size of the granulation in step c) is 1 mm to 2 mm; The drying process is carried out at a temperature of 18° C. to 35° C., a relative humidity of ≤70%, and a drying time of 20 h to 30 h.

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