Preparation method of special composite wax suitable for powdery expanded explosive production line

Abstract

The invention relates to the field of composite wax preparation methods, in particular to special composite wax suitable for a powdery expanded explosive production line, which comprises vacuum four-line wax oil, vacuum four-line deoiling wax, propane light dewaxing paste, microcrystalline wax, petroleum wax and a stabilizer. The preparation method comprises the following steps: 1, mixing the raw materials; 2, storing; step 3, cooling; forming is conducted; the composite wax disclosed by the invention ensures that an oil film of a continuous phase has enough strength, so that the oil film is prevented from being deformed or broken when ammonium nitrate and other inorganic oxidizing agents are salted out and crystallized, and the composite wax is mainly composed of vacuum four-line wax oil, vacuum four-line deoiling wax, propane light dewaxing paste, microcrystalline wax, petroleum wax and a stabilizer, is obviously a good incendiary agent in a system, and has a good combustion effect. According to the emulsion explosive, the water-soluble oxidizing agent salt is contained in the composite wax, so that the emulsion explosive has good water resistance, and the stability of the emulsion explosive can be remarkably improved by using the composite wax made of a high polymer material.

Description

Technical Field

[0001] The invention relates to the field of composite wax preparation methods, in particular to a composite wax preparation method suitable for a powdery expanded explosive production line. Background Art

[0002] Powdered expanded explosive is a multi-component mixed explosive, which is composed of oxidizer, fuel (combustion agent), sensitizer and oil phase material. Among them, the oil phase material plays a vital role in the powdered expanded explosive system. It is not only the key component of the continuous phase of the emulsion, but also affects the explosive performance, storage stability, water resistance and appearance of the explosive.

[0003] In the production process of powdered expanded explosives, the selection and proportion of oil phase materials are crucial. Although traditional oil phase materials such as T-155, paraffin and microcrystalline wax can meet the needs of explosives production to a certain extent, they still have the following performance problems. First, the viscosity, chain length, molecular structure and matching coupling with emulsifiers of traditional oil phase materials are insufficient, resulting in insufficient strength of the continuous phase oil film. Secondly, although the phase material can be used as a combustion agent, its role as a sensitizer is limited, and its water resistance is not ideal. Finally, the emulsion explosives made from oil phase materials are mostly soft and grease-like and easy to adhere.

[0004] Therefore, in view of the above-mentioned problem that the continuous phase strength and related performance effects of traditional oil phase materials are not ideal, a method for preparing a special composite wax suitable for a powdered expanded explosive production line can be designed. Summary of the invention

[0005] In order to overcome the problem of unsatisfactory continuous phase strength and related performance effects of traditional oil phase materials.

[0006] The technical scheme of the present invention is: a special composite wax suitable for a powdered expanded explosive production line, comprising the following raw materials: four-line wax oil reduction, four-line deoiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, stabilizer; the proportions by weight are as follows:

[0007] Reduce four-line wax oil: 30 to 60 parts;

[0008] Less four-line deoiled wax: 25 to 30 parts;

[0009] Propane light dewaxing paste: 15 to 50 parts;

[0010] Microcrystalline wax: 0 to 15 parts;

[0011] Petroleum wax: 0 to 10 parts;

[0012] Stabilizer: 0.5 to 1 part.

[0013] Preferably, the petroleum wax adopts one or a combination of 64# fully refined and semi-refined paraffin wax.

[0014] Preferably, the stabilizer is polyethylene, polypropylene, polyisobutylene or a combination of several thereof.

[0015] A method for preparing a special composite wax suitable for a powdered expanded explosive production line, comprising the above-mentioned special composite wax suitable for a powdered expanded explosive production line, and the steps are as follows:

[0016] Step 1: Mixing of raw materials. First, the following raw materials stored in the raw material storage tank need to be taken out: four-line wax oil reduction, four-line deoiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, and stabilizer, and accurately measured according to the pre-set weight ratio, and the above raw materials are added to the blending tank in turn. Then, the agitator of the blending tank is started, the internal temperature of the blending tank is raised to 75℃~90℃, and the raw materials in the blending tank are fully stirred for a certain period of time;

[0017] Step 2: Storage: When the raw materials in the blending tank reach the target state, the raw material mixture is transported to a high-level tank for temporary storage through a centrifugal pump;

[0018] Step three: Cooling, transporting the finished composite wax in the high-level tank to the molding machine through the conveying pipeline, cooling the composite wax in the molding machine through a chiller, so that it gradually solidifies and is ready for a process;

[0019] Step 4: Molding: the composite wax after cooling treatment is molded into the desired composite wax product after cooling for a certain period of time in a molding machine;

[0020] Step 5: Testing: Testing the produced composite wax products, mainly including the color, gloss and shape of the composite wax products in the appearance items, the hardness, melting point and viscosity of the composite wax products in the performance items; the stability of the composite wax products during long-term storage and use;

[0021] Step 6: Packaging.

[0022] Preferably, the parameters of the special composite wax product in step 5 are: drop melting point 58°C to 75°C; oil content 35% to 40%; flash point ℃ not less than 200°C; mechanical impurities not more than 0.05%; operating temperature 65°C to 90°C; kinematic viscosity (100°C) mm 2 / s 7~10.

[0023] Beneficial effects of the present invention:

[0024] Compared with traditional oil phase materials, the composite wax of the present invention ensures that the continuous phase oil film has sufficient strength, thereby preventing the oil film from deforming or breaking when inorganic oxidants such as ammonium nitrate are salted out and crystallized;

[0025] Secondly, the composite wax is mainly composed of four-line wax oil reduction, four-line de-oiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, and stabilizer. Obviously, it is a good combustion agent in the system. In the explosion reaction, the combustion agent can quickly participate in the reaction, generate a large amount of gas and heat, expand and do work. Moreover, the droplets of the oxidant aqueous solution are dispersed finely and evenly, and are closely and fully combined with the oil film of the continuous phase - the oil phase material, which is conducive to the excitation and transmission of the detonation, and also plays the role of a sensitizer.

[0026] The composite wax contains water-soluble oxidant salts, which prevents liquid stratification and prevents erosion and leaching by external water, thus having good water resistance.

[0027] The use of composite wax made of polymer materials can significantly improve the stability of emulsion explosives on the one hand, and on the other hand, the appearance of the explosives can be easily changed according to demand. In addition, during the production and storage of emulsion explosives, the appropriate viscosity can fix sensitized bubbles or solid particles entrained with gas to keep the explosives at appropriate sensitivity. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the embodiments.

[0029] Example 1

[0030] The present invention provides an embodiment: a special composite wax suitable for a powdered expanded explosive production line, comprising the following raw materials: four-line wax oil reduction, four-line deoiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, and stabilizer; the proportions by weight are as follows:

[0031] Reduce four-line wax oil: 35 parts;

[0032] Minus four-line deoiled wax: 29 parts;

[0033] Propane light dewaxing paste: 22 parts;

[0034] Microcrystalline wax: 16 parts;

[0035] Petroleum wax: 5 parts;

[0036] Stabilizer: 0.6 parts.

[0037] Preferably, the petroleum wax adopts a combination of 64# fully refined and semi-refined paraffin.

[0038] Preferably, the stabilizer is polypropylene.

[0039] A method for preparing a special composite wax suitable for a powdered expanded explosive production line, comprising the above-mentioned special composite wax suitable for a powdered expanded explosive production line, and the steps are as follows:

[0040] Step 1: Mixing of raw materials. First, the following raw materials stored in the raw material storage tank need to be taken out: four-line wax oil reduction, four-line deoiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, and stabilizer, and accurately measured according to the pre-set weight ratio, and the above raw materials are added to the blending tank in turn. Then, the agitator of the blending tank is started, the internal temperature of the blending tank is raised to 75℃~90℃, and the raw materials in the blending tank are fully stirred for a certain period of time;

[0041] Step 2: Storage: When the raw materials in the blending tank reach the target state, the raw material mixture is transported to a high-level tank for temporary storage through a centrifugal pump;

[0042] Step three: Cooling, transporting the finished composite wax in the high-level tank to the molding machine through the conveying pipeline, cooling the composite wax in the molding machine through a chiller, so that it gradually solidifies and is ready for a process;

[0043] Step 4: Molding: the composite wax after cooling treatment is molded into the desired composite wax product after cooling for a certain period of time in a molding machine;

[0044] Step 5: Testing: Testing the produced composite wax products, mainly including the color, gloss and shape of the composite wax products in the appearance items, the hardness, melting point and viscosity of the composite wax products in the performance items; the stability of the composite wax products during long-term storage and use;

[0045] Step 6: Packaging.

[0046] Example 2

[0047] The present invention provides an embodiment: a special composite wax suitable for a powdered expanded explosive production line, comprising the following raw materials: four-line wax oil reduction, four-line deoiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, and stabilizer; the proportions by weight are as follows:

[0048] Reduce four-line wax oil: 41 parts;

[0049] Minus four-line deoiled wax: 30 parts;

[0050] Propane light dewaxing paste: 19 parts;

[0051] Microcrystalline wax: 10 parts;

[0052] Petroleum wax: 5 parts;

[0053] Stabilizer: 0.6 parts.

[0054] Preferably, the petroleum wax adopts a combination of 64# fully refined paraffin wax.

[0055] Preferably, polyisobutylene is used as the stabilizer.

[0056] A method for preparing a special composite wax suitable for a powdered expanded explosive production line, comprising the above-mentioned special composite wax suitable for a powdered expanded explosive production line, and the steps are as follows:

[0057] Step 1: Mixing of raw materials. First, the following raw materials stored in the raw material storage tank need to be taken out: four-line wax oil reduction, four-line deoiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, and stabilizer, and accurately measured according to the pre-set weight ratio, and the above raw materials are added to the blending tank in turn. Then, the agitator of the blending tank is started, the internal temperature of the blending tank is raised to 75℃~90℃, and the raw materials in the blending tank are fully stirred for a certain period of time;

[0058] Step 2: Storage: When the raw materials in the blending tank reach the target state, the raw material mixture is transported to a high-level tank for temporary storage through a centrifugal pump;

[0059] Step three: Cooling, transporting the finished composite wax in the high-level tank to the molding machine through the conveying pipeline, cooling the composite wax in the molding machine through a chiller, so that it gradually solidifies and is ready for a process;

[0060] Step 4: Molding: the composite wax after cooling treatment is molded into the desired composite wax product after cooling for a certain period of time in a molding machine;

[0061] Step 5: Testing: Testing the produced composite wax products, mainly including the color, gloss and shape of the composite wax products in the appearance items, the hardness, melting point and viscosity of the composite wax products in the performance items; the stability of the composite wax products during long-term storage and use;

[0062] Step 6: Packaging.

[0063] Example 3

[0064] The present invention provides an embodiment: a special composite wax suitable for a powdered expanded explosive production line, comprising the following raw materials: four-line wax oil reduction, four-line deoiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, and stabilizer; the proportions by weight are as follows:

[0065] Reduce four-line wax oil: 57 parts;

[0066] Less four-line deoiled wax: 28 parts;

[0067] Propane light dewaxing paste: 15 parts;

[0068] Microcrystalline wax: 0 parts

[0069] Petroleum wax: 3 parts;

[0070] Stabilizer: 0.5 parts.

[0071] Preferably, the petroleum wax is semi-refined paraffin.

[0072] Preferably, the stabilizer is a combination of polypropylene and polyisobutylene.

[0073] A method for preparing a special composite wax suitable for a powdered expanded explosive production line, comprising the above-mentioned special composite wax suitable for a powdered expanded explosive production line, and the steps are as follows:

[0074] Step 1: Mixing of raw materials. First, the following raw materials stored in the raw material storage tank need to be taken out: four-line wax oil reduction, four-line deoiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, and stabilizer, and accurately measured according to the pre-set weight ratio, and the above raw materials are added to the blending tank in turn. Then, the agitator of the blending tank is started, the internal temperature of the blending tank is raised to 75℃~90℃, and the raw materials in the blending tank are fully stirred for a certain period of time;

[0075] Step 2: Storage: When the raw materials in the blending tank reach the target state, the raw material mixture is transported to a high-level tank for temporary storage through a centrifugal pump;

[0076] Step three: Cooling, transporting the finished composite wax in the high-level tank to the molding machine through the conveying pipeline, cooling the composite wax in the molding machine through a chiller, so that it gradually solidifies and is ready for a process;

[0077] Step 4: Molding: the composite wax after cooling treatment is molded into the desired composite wax product after cooling for a certain period of time in a molding machine;

[0078] Step 5: Testing: Testing the produced composite wax products, mainly including the color, gloss and shape of the composite wax products in the appearance items, the hardness, melting point and viscosity of the composite wax products in the performance items; the stability of the composite wax products during long-term storage and use;

[0079] Step 6: Packaging.

[0080] Table 1 is the main technical indicators of special composite wax

[0081] project Quality indicators Experimental methods Drop melting point, ℃ 58℃～75℃ GB / T8026 Kinematic viscosity (100℃), mm2 / s, 7～10 GB / T265 Oil content, % 25％～30％ SH / T3554 Flash point (open)℃ Not less than 200℃ GB / T265 Color / Number 2.5 GB / T6540

[0082] Table 1

Claims

1. A composite wax suitable for powdered expanded explosive production line, characterized in that: The raw materials include: four-line wax de-oiling, four-line de-oiling wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, stabilizer; the proportions by weight are as follows: Reduce four-line wax oil: 30 to 60 parts; Less four-line deoiled wax: 25 to 30 parts; Propane light dewaxing paste: 15 to 50 parts; Microcrystalline wax: 0 to 15 parts; Petroleum wax: 0 to 10 parts; Stabilizer: 0.5 to 1 part.

2. The special composite wax suitable for powdered expanded explosive production line according to claim 1, characterized in that: The petroleum wax adopts one or a combination of 64# fully refined and semi-refined paraffin wax.

3. The special composite wax suitable for powdered expanded explosive production line according to claim 1, characterized in that: The stabilizer is polyethylene, polypropylene, polyisobutylene or a combination of several thereof.

4. A method for preparing a special composite wax suitable for a powdered expanded explosive production line, characterized in that The method comprises the following steps of preparing a special composite wax suitable for a powdered expanded explosive production line according to any one of claims 1 to 3: Step 1: Mixing of raw materials. First, the following raw materials stored in the raw material storage tank need to be taken out: four-line wax oil reduction, four-line deoiled wax, propane light dewaxing paste, microcrystalline wax, petroleum wax, and stabilizer, and accurately measured according to the pre-set weight ratio, and the above raw materials are added to the blending tank in turn. Then, the agitator of the blending tank is started, the internal temperature of the blending tank is raised to 75℃~90℃, and the raw materials in the blending tank are fully stirred for a certain period of time; Step 2: Storage: When the raw materials in the blending tank reach the target state, the raw material mixture is transported to a high-level tank for temporary storage through a centrifugal pump; Step three: Cooling, transporting the finished composite wax in the high-level tank to the molding machine through the conveying pipeline, cooling the composite wax in the molding machine through a chiller, so that it gradually solidifies and is ready for a process; Step 4: Molding: the composite wax after cooling treatment is molded into the desired composite wax product after cooling for a certain period of time in a molding machine; Step 5: Testing: Testing the produced composite wax products, mainly including the color, gloss and shape of the composite wax products in the appearance items, the hardness, melting point and viscosity of the composite wax products in the performance items; the stability of the composite wax products during long-term storage and use; Step 6: Packaging.

5. The special composite wax suitable for powdered expanded explosive production line according to claim 4, characterized in that: The relevant parameters of the special composite wax product in step 5 are: drop melting point 58℃~75℃; oil content 35%~40%; flash point ℃ not less than 200℃; mechanical impurities not more than 0.05%; operating temperature 65℃~90℃; kinematic viscosity (100℃) mm 2 / s 7~10 。