Mixing system and explosive mixing process

Abstract

The application provides a mixing system and an explosive mixing process. The mixing system comprises: a first mixing device, which comprises a first shell and a first stirring part arranged in the first shell, the first shell is provided with a first feeding port, a second feeding port and a first discharging port; the first stirring part is rotatably arranged to stir and convey the first material entering from the first feeding port and the second material entering from the second feeding port to the first discharging port; and a second mixing device, which comprises a second shell and a second stirring part arranged in the second shell, the second shell is provided with a third feeding port, a fourth feeding port and a second discharging port, the third feeding port is communicated with the first discharging port; the second stirring part is rotatably arranged to stir and convey the material entering from the third feeding port and the second material entering from the fourth feeding port to the second discharging port. The mixing system of the application solves the problem of unstable explosive performance caused by non-uniformity of nano-carbon hydroxyl ammonium oil explosive in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of explosives, in particular to a mixing system and explosive mixing process. BACKGROUND

[0002] Porous granular ammonium nitrate fuel oil explosive has become the mainstream product in the market of ammonium nitrate fuel oil explosive due to its advantages of high oil absorption capacity, good flowability, low hygroscopicity and good storage stability, and is widely used in open-pit mine engineering blasting, tunnel blasting and stone blasting, and is a kind of explosive with large use amount in industrial explosive.

[0003] Currently, the preparation components of porous granular ammonium nitrate fuel oil explosive include two kinds, one is porous granular ammonium nitrate as an oxidizing agent, and the other is diesel as a combustible agent. How to promote the resource-saving use of porous granular ammonium nitrate fuel oil explosive and reduce the production cost is a subject that needs to be focused on and researched. A new type of liquid coal-based special fuel, i.e. coal-based nano-carbon hydrogen fuel, is a liquid coal-based special fuel with a nano-level basic particle size and high surface activity, which is made of coal, water and a small amount of additives through an advanced nanometer processing technology. The coal-based nano-carbon hydrogen fuel is a new type of high-efficiency and clean environmental protection fuel, which has the characteristics of low raw material calorific value, low fuel solid content, low ignition temperature and high fuel calorific value. The nano-carbon hydrogen fuel prepared by the technology not only has excellent combustion characteristics, but also has good thermal stability, non-spontaneous combustion, non-flammability, non-deflagration, easy storage and transportation under normal temperature and pressure, and high safety, which is expected to replace diesel for industrial production of ammonium nitrate fuel oil explosive, reduce the production cost of ammonium nitrate fuel oil explosive, and solve the over-reliance of ammonium nitrate fuel oil explosive on fossil energy.

[0004] However, the nano-carbon hydrogen additive, as a liquid coal-based material with a nano-level particle size, has a viscosity greater than that of diesel, which causes the flowability of the nano-carbon hydrogen additive to be lower than that of diesel. In addition, the absorption rate of diesel by ammonium nitrate is also better than that of the nano-carbon hydrogen additive. These two differences result in non-uniformity of the nano-carbon hydrogen ammonium nitrate fuel oil explosive prepared by using the conventional ammonium nitrate fuel oil explosive mixing process, and naked eyes can observe the ammonium nitrate particles without wrapping the nano-carbon hydrogen additive. This non-uniform mixing directly leads to unstable performance of the explosive, and affects the performance of the explosive such as detonation velocity, brisance and workability. SUMMARY

[0005] The main purpose of the present application is to provide a mixing system and explosive mixing process to solve the problem of unstable performance of the explosive due to non-uniformity of the nano-carbon hydrogen ammonium nitrate fuel oil explosive in the prior art.

[0006] In order to achieve the above object, according to one aspect of the present application, a mixing system is provided, comprising: a first mixing device comprising a first housing and a first stirring member arranged in the first housing, the first housing having a first feeding port for feeding a first material, a second feeding port for feeding a second material, and a first discharging port, the second feeding port being arranged between the first feeding port and the first discharging port; the first stirring member being rotatably arranged to stir and convey the first material fed through the first feeding port and the second material fed through the second feeding port to the first discharging port; and a second mixing device comprising a second housing and a second stirring member arranged in the second housing, the second housing having a third feeding port communicated with the first discharging port, a fourth feeding port for feeding the second material, and a second discharging port; the second stirring member being rotatably arranged to stir and convey the material fed through the third feeding port and the second material fed through the fourth feeding port to the second discharging port.

[0007] Further, a spray head is arranged at the second feeding port to spray the second material into the first housing after being atomized by the spray head.

[0008] Further, the first housing has a plurality of second feeding ports arranged in sequence from the first feeding port to the first discharging port, and each of the second feeding ports is provided with a spray head.

[0009] Further, the first housing has a first end and a second end arranged oppositely in a horizontal direction, the first feeding port is arranged at the first end of the first housing, and the first discharging port is arranged at the second end of the first housing to convey the material in the first housing in the horizontal direction; and the second feeding port is arranged between the first feeding port and the first discharging port in the horizontal direction.

[0010] Further, a spray part is arranged at the fourth feeding port, and a plurality of spray holes are arranged at the spray part in a spaced manner to allow the second material to enter the second housing through the plurality of spray holes.

[0011] Further, the second housing has a plurality of fourth feeding ports arranged at the top of the second housing in a spaced manner, and each of the fourth feeding ports is provided with a spray part.

[0012] Further, the second discharging port is arranged lower than the fourth feeding port, and the third feeding port is arranged lower than the second discharging port.

[0013] Further, the first mixing device further comprises a first driving member drivingly connected with the first stirring member to drive the first stirring member to rotate; and / or the second mixing device further comprises a second driving member drivingly connected with the second stirring member to drive the second stirring member to rotate.

[0014] Further, the mixing system further comprises a three-dimensional motion mixer, and the inlet of the three-dimensional motion mixer is communicated with the second discharge port.

[0015] According to another aspect of the present application, there is provided an explosive mixing process, which is applicable to the mixing system as described above, and the explosive mixing process comprises: feeding the ammonium nitrate into the first shell through the first feeding port; feeding the nano-carbon hydrogen additive into the first shell through the second feeding port; controlling the rotation of the first stirring member so that the first stirring member delivers the mixed ammonium nitrate and nano-carbon hydrogen additive to the first discharge port; making the third feeding port receive the material flowed out of the first discharge port; feeding the nano-carbon hydrogen additive into the second shell through the fourth feeding port; and controlling the rotation of the second stirring member so that the second stirring member delivers the mixed ammonium nitrate and nano-carbon hydrogen additive to the second discharge port; wherein the ammonium nitrate is the first material, and the nano-carbon hydrogen additive is the second material.

[0016] Further, the process of feeding the nano-carbon hydrogen additive into the first shell through the second feeding port comprises: feeding 70% to 80% of the total amount of the nano-carbon hydrogen additive into the first shell through the second feeding port.

[0017] Further, the process of feeding the nano-carbon hydrogen additive into the second shell through the fourth feeding port comprises: feeding 20% to 30% of the total amount of the nano-carbon hydrogen additive into the second shell through the fourth feeding port.

[0018] Further, the process of controlling the rotation of the first stirring member comprises: controlling the rotation of the first stirring member at a rotation speed of 5-20 r / min.

[0019] Further, the explosive mixing process is applicable to the mixing system as described above, and the first mixing device of the mixing system has five spray heads; the explosive mixing process comprises: controlling the atomization pressure of the five spray heads arranged in sequence in the direction from the first feeding port to the first discharge port to be 1.1-1.3 MPa, 0.7-0.9 MPa, 1.1-1.3 MPa, 0.9-1.1 MPa and 1.1-1.3 MPa in sequence; and / or, controlling the flow rate of the five spray heads arranged in sequence in the direction from the first feeding port to the first discharge port to be 75-85 L / h, 25-35 L / h, 55-65 L / h, 35-45 L / h, 45-55 L / h in sequence.

[0020] Further, the explosive mixing process is applicable to the mixing system as described above, and the explosive mixing process comprises: controlling the material flowed out of the second discharge port to enter the three-dimensional motion mixer for mixing for a predetermined length of time.

[0021] According to the technical solution of this invention, the mixing system includes a first mixing device and a second mixing device. The first mixing device includes a first shell and a first stirring member. The first shell has a first inlet, a second inlet, and a first outlet. The second mixing device includes a second shell and a second stirring member. The second shell has a third inlet, a fourth inlet, and a second outlet. A first material enters the first mixing device through the first inlet, and a second material enters the first mixing device through the second inlet. The first stirring member stirs and mixes the first and second materials, and conveys the mixed material to the first outlet, leaving the first mixing device. At this point, the first and second materials complete the first stage of mixing, i.e., coarse mixing. The coarsely mixed material sequentially enters the second mixing device through the first outlet and the third inlet, and the second material enters the second mixing device through the fourth inlet. The second stirring member rotates at high speed to mix the coarsely mixed material and the second material at high speed, and conveys the high-speed mixed material to the second outlet, leaving the second mixing device. At this point, the first and second materials complete the second stage of mixing, i.e., high-speed mixing. The mixing system of the present invention performs two-stage mixing of the first material and the second material through a first mixing device and a second mixing device. The second material is added to the first mixing device and the second mixing device respectively, which ensures that the second material and the first material are mixed evenly. This solves the problem of unstable explosive performance caused by uneven mixing of nano-hydrogen ammonium nitrate oil in the prior art, ensures the stability of the explosive, improves the explosive performance, and improves the blasting effect. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Fig. 1 A schematic diagram of a first mixing device according to an embodiment of the mixing system of the present invention is shown;

[0024] Fig. 2 A schematic diagram of a second mixing device according to an embodiment of the mixing system of the present invention is shown;

[0025] Fig. 3 A schematic diagram of the spray section of an embodiment of the mixing system according to the present invention is shown.

[0026] The above figures include the following reference numerals:

[0027] 10, first mixing device; 11, first housing; 111, first feeding port; 112, second feeding port; 113, first discharging port; 114, first feeding hopper; 115, first discharging hopper; 12, first stirring member; 13, nozzle; 20, second mixing device; 21, second housing; 211, third feeding port; 212, fourth feeding port; 213, second discharging port; 214, third feeding hopper; 215, second discharging hopper; 22, second stirring member; 23, spraying part; 231, spraying hole. DETAILED DESCRIPTION

[0028] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0030] It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component, and / or combination thereof.

[0031] The present application provides a mixing system, please refer to Figs. 1 to 3 , comprising: a first mixing device 10, comprising a first housing 11 and a first stirring member 12 arranged in the first housing 11, the first housing 11 having a first feeding port 111, a second feeding port 112 and a first discharging port 113, the first feeding port 111 being used for adding a first material, the second feeding port 112 being used for adding a second material, the second feeding port 112 being located between the first feeding port 111 and the first discharging port 113; the first stirring member 12 being rotatably arranged to stir and convey the first material entering from the first feeding port 111 and the second material entering from the second feeding port 112 to the first discharging port 113; a second mixing device 20, comprising a second housing 21 and a second stirring member 22 arranged in the second housing 21, the second housing 21 having a third feeding port 211, a fourth feeding port 212 and a second discharging port 213, the third feeding port 211 being in communication with the first discharging port 113, the fourth feeding port 212 being used for adding the second material; the second stirring member 22 being rotatably arranged to stir and convey the material entering from the third feeding port 211 and the second material entering from the fourth feeding port 212 to the second discharging port 213.

[0032] The mixing system of the present application comprises a first mixing device 10 and a second mixing device 20, the first mixing device 10 comprises a first housing 11 and a first stirring member 12, the first housing 11 has a first feeding port 111, a second feeding port 112 and a first discharging port 113; the second mixing device 20 comprises a second housing 21 and a second stirring member 22, the second housing 21 has a third feeding port 211, a fourth feeding port 212 and a second discharging port 213. The first material enters the first mixing device 10 through the first feeding port 111, the second material enters the first mixing device 10 through the second feeding port 112, the first stirring member 12 stirs and mixes the first material and the second material, and delivers the mixed material to the first discharging port 113 to leave the first mixing device, at this time, the first material and the second material complete the first stage of mixing, i.e. coarse mixing; the coarse mixed material enters the second mixing device 20 through the first discharging port 113 and the third feeding port 211 in turn, the second material enters the second mixing device 20 from the fourth feeding port 212, the second stirring member 22 rotates at high speed to mix the coarse mixed material and the second material at high speed, and delivers the high-speed mixed material to the second discharging port 213 to leave the second mixing device 20, at this time, the first material and the second material complete the second stage of mixing, i.e. high-speed mixing. The mixing system of the present application mixes the first material and the second material in two stages through the first mixing device 10 and the second mixing device 20, and adds the second material in the first mixing device 10 and the second mixing device 20 respectively, which ensures that the second material is uniformly mixed with the first material, thereby solving the problem of unstable performance of the nanometer carbon hydroxyl ammonium oil explosive in the prior art due to non-uniform mixing, ensuring the stability of the explosive, improving the explosion performance of the explosive, and improving the blasting effect.

[0033] In the present embodiment, a spray head 13 is arranged at the second feeding port 112 to spray the second material into the first housing 11 after being atomized by the spray head 13. Such arrangement allows the second material to be sprayed into the first housing after being atomized by the spray head 13, so that the second material can be uniformly sprayed onto the first material, further helping to uniformly mix the first material and the second material.

[0034] In the present embodiment, the first housing 11 has a plurality of second feeding ports 112, the plurality of second feeding ports 112 are arranged in sequence from the first feeding port 111 to the first discharging port 113, and each second feeding port 112 is provided with a spray head 13.

[0035] Specifically, the plurality of spray heads 13 are connected with the first conveying pump through the first hose assembly, the first conveying pump conveys the second material to the plurality of spray heads 13, the second material is atomized by the plurality of spray heads 13 and sprayed into the first shell 11 through the plurality of second feeding ports 112, and is uniformly sprayed on the first material. The plurality of second feeding ports 112 are each provided with a spray head 13, so that the second material realizes multi-port feeding and multi-point mixing with the first material, which further helps the first material and the second material to be uniformly mixed. The first hose assembly includes a plurality of first branch pipes and a first main pipe. The plurality of first branch pipes are provided in one-to-one correspondence with the plurality of spray heads. The first end of each first branch pipe is connected and communicated with the corresponding spray head. The second end of each first branch pipe is connected and communicated with the first end of the first main pipe. The second end of the first main pipe is communicated with the outlet of the first conveying pump. Each first branch pipe is provided with a first control valve for controlling the on-off and flow regulation of the first branch pipe.

[0036] In the embodiment, the first shell 11 has a first end and a second end arranged opposite to each other in the horizontal direction. The first feeding port 111 is arranged at the first end of the first shell 11, and the first discharging port 113 is arranged at the second end of the first shell 11, so as to convey the material in the first shell 11 in the horizontal direction. The second feeding port 112 is arranged between the first feeding port 111 and the first discharging port 113 in the horizontal direction.

[0037] Specifically, the first feeding hopper and the first feeding port 111 are arranged at the top of the first end of the first shell 11, and the first feeding hopper is communicated with the first feeding port 111. The first discharging hopper and the first discharging port 113 are arranged at the bottom of the second end of the first shell 11, and the first discharging hopper is communicated with the first discharging port 113. The second feeding port 112 is arranged at the top of the first shell 11. The first material enters the first shell 11 through the first feeding hopper 114 and the first feeding port. The second material enters the first shell 11 from the second feeding port 112. The first material and the second material are mixed by the first stirring member under the action of gravity and then flow out of the first mixing device through the first discharging hopper 115 at the bottom of the first shell 11.

[0038] In the embodiment, the fourth feeding port 212 is provided with a spraying part 23, and the spraying part 23 is provided with a plurality of spraying holes 231 arranged at intervals, so that the second material enters the second shell 21 through the plurality of spraying holes 231. Such an arrangement enables the spraying part 23 to spray the second material into the second shell through the plurality of spraying holes 231, so that the second material is uniformly sprayed on the coarsely mixed material, which helps the second material and the first material to be uniformly mixed.

[0039] Specifically, the spraying part 23 is a shower nozzle, and the spraying part 23 is connected with the second conveying pump through the second hose assembly. The second conveying pump conveys the second material to the spraying part 23. The second material is atomized by the spraying part 23 and sprayed into the second shell 21 from the plurality of spraying holes 231, and uniformly sprayed on the first material. The second hose assembly includes a second branch pipe and a second main pipe. The first end of the second branch pipe is connected with and communicates with the spraying part 23. The second end of the second branch pipe is connected with and communicates with the first end of the second main pipe. The second end of the second main pipe communicates with the outlet of the second conveying pump. The second control valve is arranged on the second branch pipe, and is used to control the on-off and flow regulation of the second branch pipe.

[0040] The spraying part 23 is connected with the hose pump. The hose pump conveys the second material to the spraying part 23. The conveying parameters of the second conveying pump are as follows: the pressure is 0.35-0.45 MPa, and the total flow is 45-55 L / h.

[0041] Optionally, the conveying parameters of the second conveying pump are as follows: the pressure is 0.4 MPa, and the total flow is 50 L / h.

[0042] In the embodiment, the second shell 21 has a plurality of fourth feeding ports 212. The plurality of fourth feeding ports 212 are arranged at intervals at the top of the second shell 21. The spraying part 23 is arranged at each fourth feeding port 212.

[0043] In specific implementation, the second material is sprayed into the second shell 21 through the plurality of spraying parts 23 and the plurality of fourth feeding ports 212, so that the second material is fed through multiple ports, and the material after rough mixing is mixed at multiple places, which further helps the first material and the second material to be uniformly mixed.

[0044] In the embodiment, the second discharge port 213 is arranged lower than the fourth feeding port 212, and the third feeding port 211 is arranged lower than the second discharge port 213.

[0045] Specifically, the second shell 21 has a first end and a second end arranged oppositely in the horizontal direction. The third feeding hopper 214, the second feeding channel and the third feeding port 211 are arranged at the bottom of the first end of the second shell 21. The second feeding channel is arranged between the third feeding port 211 and the third feeding hopper 214. The third feeding hopper 214 communicates with the second feeding channel, and the second feeding channel communicates with the third feeding port 211. The second discharge hopper 215 and the second discharge port 213 are arranged at the top of the second end of the second shell 21. The second discharge hopper 215 and the second discharge port 213 communicate with each other. The fourth feeding port 212 is arranged between the third feeding port 211 and the second discharge port 213 in the horizontal direction. Such arrangement helps the first material and the second material to be uniformly mixed.

[0046] In particular implementation, the coarsely mixed material enters the second shell 21 from the third feeding port 211, and the second stirring member 22 drives the coarsely mixed material to rotate from bottom to top, the second material enters the second shell 21 from the fourth feeding port 212, and the second material sprays the coarsely mixed material from top to bottom, and the second stirring member 22 mixes the second material and the coarsely mixed material, and the mixed material overflows from the second discharging port 213 at the top of the second shell 21.

[0047] In the embodiment, the first mixing device 10 further comprises a first driving member in driving connection with the first stirring member 12 to drive the first stirring member 12 to rotate, and / or the second mixing device 20 further comprises a second driving member in driving connection with the second stirring member 22 to drive the second stirring member 22 to rotate.

[0048] Specifically, the first driving member drives the first stirring member 12 to rotate to stir the first material and the second material, so that the first material and the second material are mixed, and the second driving member drives the second stirring member 22 to rotate to stir the first material and the second material, so that the first material and the second material are further mixed.

[0049] In the embodiment, the mixing system further comprises a three-dimensional motion mixer, and an inlet of the three-dimensional motion mixer is in communication with the second discharging port 213.

[0050] Specifically, the material after the second stage of high-speed mixing enters the three-dimensional motion mixer from the second discharging port 213 for a third stage of mixing, and the three-dimensional motion mixer performs low-speed homogenization mixing on the first material and the second material, so that the first material and the second material are further mixed and uniform.

[0051] Specifically, the ammonium nitrate is the first material, and the nano-carbon hydrogen additive is the second material, the nano-carbon hydrogen additive is a coal-based nano-carbon hydrogen additive, which is composed of coal, water and a small amount of additives, and is a coal-based liquid slurry with a nano-scale basic particle size and high surface activity, which is prepared by an advanced nanometerization treatment process, has the characteristics of low raw material calorific value, low fuel solid content, low ignition temperature and high fuel calorific value, and can realize clean combustion of energy saving, consumption reduction, pollution reduction and efficiency improvement in boiler combustion, and can replace coal as boiler fuel. According to the different requirements of different application fields of ammonium nitrate fuel oil on the detonation velocity, the brisance, the work capacity, the original nano-carbon hydrogen slurry is customized and developed in terms of particle size, concentration and hydrogen content to form a nano-carbon hydrogen additive suitable for the current ammonium nitrate fuel oil.

[0052] The application further provides an explosive mixing process suitable for the mixing system in the above embodiment, and the explosive mixing process comprises the following steps.

[0053] Step S100, the ammonium nitrate is sent into the first shell 11 through the first feeding port 111, and the nano-carbon hydrogen additive is sent into the first shell 11 through the second feeding port 112, and the first stirring part 12 is controlled to rotate, so that the first stirring part 12 transports the mixed ammonium nitrate and nano-carbon hydrogen additive to the first discharging port 113;

[0054] Step S200, the third feeding port 211 receives the material flowed out from the first discharging port 113, and the nano-carbon hydrogen additive is sent into the second shell 21 through the fourth feeding port 212, and the second stirring part 22 is controlled to rotate, so that the second stirring part transports the mixed ammonium nitrate and nano-carbon hydrogen additive to the second discharging port 213.

[0055] The ammonium nitrate is the first material, and the nano-carbon hydrogen additive is the second material.

[0056] The explosive mixing process of the application is suitable for the mixing system in the above embodiment, and the explosive mixing process comprises the following steps: the ammonium nitrate is sent into the first shell 11 through the first feeding port 111, and the nano-carbon hydrogen additive is sent into the first shell 11 through the second feeding port 112, and the first stirring part 12 is controlled to rotate, so that the first stirring part 12 stirs and mixes the ammonium nitrate and the nano-carbon hydrogen additive, and transports the mixed ammonium nitrate and nano-carbon hydrogen additive to the first discharging port 113, at this time, the first-stage mixing, i.e. the coarse mixing, is completed; the material flowed out from the first discharging port 113 enters the second shell 21 through the third feeding port 211; the nano-carbon hydrogen additive is sent into the second shell 21 through the fourth feeding port 212; and the second stirring part 22 is controlled to rotate, so that the second stirring part 22 stirs and mixes the ammonium nitrate and the nano-carbon hydrogen additive, and transports the mixed ammonium nitrate and nano-carbon hydrogen additive to the second discharging port 213, at this time, the second-stage mixing, i.e. the high-speed mixing, is completed. The explosive mixing process of the application guarantees the uniform mixing of the ammonium nitrate and the nano-carbon hydrogen additive through the coarse mixing in the first stage and the high-speed mixing in the second stage, thereby solving the problem of unstable performance of the explosive due to the non-uniform nano-carbon hydrogen ammonium oil explosive in the prior art, guaranteeing the stability of the explosive, improving the explosion performance of the explosive, and improving the blasting effect.

[0057] The ammonium nitrate is porous granular ammonium nitrate.

[0058] In this embodiment, the process of sending the nano-carbon hydrogen additive into the first shell 11 through the second feeding port 112 comprises the following steps: 70% to 80% of the total amount of the nano-carbon hydrogen additive is sent into the first shell 11 through the second feeding port 112.

[0059] Specifically, 70% to 80% of the total amount of the nano-carbon hydrogen additive is sent into the first shell 11 through the second feeding port 112 in the first stage, so that most of the nano-carbon hydrogen additive is preliminarily mixed with the ammonium nitrate.

[0060] Optionally, 75% of the total amount of the nano-carbon hydrogen adjuvant is fed into the first shell 11.

[0061] In the embodiment, the process of feeding the nano-carbon hydrogen adjuvant into the second shell 21 through the fourth feeding port 212 includes: feeding 20% to 30% of the total amount of the nano-carbon hydrogen adjuvant into the second shell 21 through the fourth feeding port 212.

[0062] Optionally, 25% of the total amount of the nano-carbon hydrogen adjuvant is fed into the second shell 21.

[0063] Specifically, 20% to 30% of the total amount of the nano-carbon hydrogen adjuvant is fed into the second shell 21 through the fourth feeding port 212 in the second stage, and the nano-carbon hydrogen adjuvant is added to the coarsely mixed nano-carbon hydrogen adjuvant and ammonium nitrate, so that the remaining nano-carbon hydrogen adjuvant is further mixed with the ammonium nitrate, ensuring uniform mixing of the nano-carbon hydrogen adjuvant and the ammonium nitrate.

[0064] In the embodiment, the process of controlling the rotation of the first stirring member 12 includes: controlling the first stirring member 12 to rotate at a speed of 5-20 r / min. Such a setting helps the first stirring member 12 to fully stir the nano-carbon hydrogen adjuvant and the ammonium nitrate, and helps the nano-carbon hydrogen adjuvant and the ammonium nitrate to mix uniformly.

[0065] Optionally, the rotation speed of the first stirring member 12 is 15 r / min.

[0066] In the embodiment, the explosive mixing process is applicable to the mixing system in the above-mentioned embodiments, and the first mixing device 10 of the mixing system has five spray heads 13. The explosive mixing process includes: controlling the atomization pressure of the five spray heads 13 arranged in the direction from the first feeding port 111 to the first discharging port 113 to be 1.1-1.3 MPa, 0.7-0.9 MPa, 1.1-1.3 MPa, 0.9-1.1 MPa and 1.1-1.3 MPa in sequence; and / or, controlling the flow rate of the five spray heads 13 arranged in the direction from the first feeding port 111 to the first discharging port 113 to be 75-85 L / h, 25-35 L / h, 55-65 L / h, 35-45 L / h, 45-55 L / h in sequence. Such a setting makes the second material at the five spray heads 13 have different atomization degrees and ejection speeds, so that the second material can be better mixed with the first material.

[0067] Optionally, the atomization pressures of the five spray heads 13 are 1.2 MPa, 0.8 MPa, 1.2 MPa, 1.0 MPa and 1.2 MPa, respectively; and the flow rates of the five spray heads 13 are 80 L / h, 30 L / h, 60 L / h, 40 L / h and 50 L / h, respectively.

[0068] In the embodiment, the explosive mixing process is applicable to the mixing system in the above embodiment, and the explosive mixing process comprises: controlling the material flowing out of the second discharge port 213 to enter the three-dimensional motion mixer for mixing for a predetermined time length.

[0069] Specifically, the mixing time length of the material flowing out of the second discharge port 213 to enter the three-dimensional motion mixer is 0.5-2 hours, and such a setting enables the first material and the second material to be fully mixed in the three-dimensional motion mixer.

[0070] Optionally, the three-dimensional motion mixer is selected to perform low-speed homogeneous mixing, and the mixing time length is 1 hour.

[0071] Specifically, the equipment parameters of the three-dimensional motion mixer are as follows: barrel volume 1000L; loading volume 800L; loading weight 600-800kg; main shaft rotating speed 8-15r / min; motor power 10KW.

[0072] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0073] The mixing system of the present application enables the high-viscosity nano-carbon hydrogen additive to be fully mixed with the porous granular ammonium nitrate, thereby ensuring the stability of the explosive; the explosion performance of the explosive is improved, the matching of the explosive and the blasting process is improved, and the blasting effect is improved; the application field of the coal-based nano-carbon hydrogen fuel is widened, the clean utilization of coal in the production of industrial explosives is realized, a new path is opened up for promoting energy saving and emission reduction in the coal industry, realizing green transformation and high-quality development, relieving the dependence of industrial explosive production on petroleum products; the nano-carbon hydrogen additive is low in cost, and the use of the nano-carbon hydrogen additive to replace diesel greatly saves the cost of explosives.

[0074] The mixing system of the present application comprises a first mixing device 10 and a second mixing device 20, the first mixing device 10 comprises a first housing 11 and a first stirring part 12, the first housing 11 has a first feeding port 111, a second feeding port 112 and a first discharging port 113; the second mixing device 20 comprises a second housing 21 and a second stirring part 22, the second housing 21 has a third feeding port 211, a fourth feeding port 212 and a second discharging port 213. The first material enters the first mixing device 10 through the first feeding port 111, the second material enters the first mixing device 10 through the second feeding port 112, the first stirring part 12 stirs and mixes the first material and the second material, and delivers the mixed material to the first discharging port 113 to leave the first mixing device, at this time, the first material and the second material complete the first stage of mixing, that is, coarse mixing; the coarse mixed material enters the second mixing device 20 through the first discharging port 113 and the third feeding port 211 in turn, the second material enters the second mixing device 20 from the fourth feeding port 212, the second stirring part 22 rotates at high speed to mix the coarse mixed material and the second material at high speed, and delivers the high-speed mixed material to the second discharging port 213 to leave the second mixing device 20, at this time, the first material and the second material complete the second stage of mixing, that is, high-speed mixing. The mixing system of the present application mixes the first material and the second material in two stages through the first mixing device 10 and the second mixing device 20, respectively adding the second material in the first mixing device 10 and the second mixing device 20, which ensures that the second material is uniformly mixed with the first material, thereby solving the problem of unstable performance of the nanometer carbon hydroxyl ammonium oil explosive in the prior art due to uneven mixing, ensuring the stability of the explosive, improving the explosion performance of the explosive, and improving the blasting effect.

[0075] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0076] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the inventive concepts can assume various alternative orientations, except where expressly omitted.

[0077] The application has been described in an illustrative manner, and it is to be understood that the terminology can be used in the manner in which it is intended to be used. However, it should be noted that the language is merely used for the purpose of providing structural disclosure of the application, and the intent is not to limit the scope of the application.

Claims

1. A mixing system, characterized in that, include: The first mixing device (10) includes a first housing (11) and a first agitator (12) disposed within the first housing (11). The first housing (11) has a first inlet (111), a second inlet (112), and a first outlet (113). The first inlet (111) is used to add a first material, and the second inlet (112) is used to add a second material. The second inlet (112) is located between the first inlet (111) and the first outlet (113). The first agitator (12) is rotatably disposed to agitate the first material entering through the first inlet (111) and the second material entering through the second inlet (112) and convey them to the first outlet (113). The second mixing device (20) includes a second housing (21) and a second agitator (22) disposed within the second housing (21). The second housing (21) has a third inlet (211), a fourth inlet (212), and a second outlet (213). The third inlet (211) is connected to the first outlet (113), and the fourth inlet (212) is used to add the second material. The second agitator (22) is rotatably disposed to agitate and convey the material entering through the third inlet (211) and the second material entering through the fourth inlet (212) to the second outlet (213). A spray section (23) is provided at the fourth feed inlet (212), and a plurality of spray holes (231) are provided on the spray section (23) so that the second material enters the second housing (21) through the plurality of spray holes (231); The spray section (23) is connected to the second delivery pump via the second hose assembly. The second delivery pump delivers the second material to the spray section (23). After being atomized by the spray section (23), the second material is sprayed into the interior of the second housing (21) through multiple spray holes (231) and evenly sprayed onto the first material. The second hose assembly includes a second branch pipe and a second main pipe. The first end of the second branch pipe is connected to and communicates with the spray section (23). The second end of the second branch pipe is connected to and communicates with the first end of the second main pipe. The second end of the second main pipe is connected to the outlet of the second delivery pump. A second control valve is provided on the second branch pipe. The second control valve is used to control the opening and closing of the second branch pipe and to adjust the flow rate. The second discharge port (213) is set lower than the fourth feed port (212), and the third feed port (211) is set lower than the second discharge port (213).

2. The mixing system according to claim 1, characterized in that, A nozzle (13) is provided at the second feed inlet (112) so that the second material is atomized by the nozzle (13) and sprayed into the first housing (11).

3. The mixing system according to claim 2, characterized in that, The first housing (11) has a plurality of second feed ports (112), which are arranged sequentially from the first feed port (111) to the first discharge port (113), and each second feed port (112) is provided with a nozzle (13).

4. The mixing system according to claim 1, characterized in that, The first housing (11) has a first end and a second end that are arranged opposite to each other in the horizontal direction. The first inlet (111) is arranged at the first end of the first housing (11), and the first outlet (113) is arranged at the second end of the first housing (11) to convey the material in the first housing (11) in the horizontal direction. The second inlet (112) is arranged in the horizontal direction between the first inlet (111) and the first outlet (113).

5. The mixing system according to claim 1, characterized in that, The second housing (21) has a plurality of fourth feed ports (212), which are spaced apart on the top of the second housing (21), and each of the fourth feed ports (212) is provided with a spray section (23).

6. The mixing system according to any one of claims 1 to 4, characterized in that, The first mixing device (10) further includes a first driving member, which is drivenly connected to the first stirring member (12) to drive the first stirring member (12) to rotate; and / or, The second mixing device (20) also includes a second driving member, which is driven to connect with the second stirring member (22) to drive the second stirring member (22) to rotate.

7. The mixing system according to any one of claims 1 to 4, characterized in that, The mixing system also includes: A three-dimensional motion mixer, wherein the inlet of the three-dimensional motion mixer is connected to the second outlet (213).

8. A process for mixing explosives, characterized in that, The mixing system applicable to any one of claims 1 to 7, wherein the explosive mixing process comprises: Ammonium nitrate is fed into the first housing (11) through the first inlet (111); and nano hydrocarbon additives are fed into the first housing (11) through the second inlet (112); and the first stirring element (12) is controlled to rotate so that the first stirring element (12) conveys the mixed ammonium nitrate and nano hydrocarbon additives to the first outlet (113). The third inlet (211) receives the material flowing out of the first outlet (113); the nano hydrocarbon additive is fed into the second shell (21) through the fourth inlet (212); and the second stirring element (22) is controlled to rotate so that the second stirring element (22) conveys the mixed ammonium nitrate and the nano hydrocarbon additive to the second outlet (213). Wherein, the ammonium nitrate is the first material, and the nano hydrocarbon additive is the second material.

9. The explosive mixing process according to claim 8, characterized in that, The process of feeding the nano-hydrogen additive into the first housing (11) through the second inlet (112) includes: 70% to 80% of the total amount of nano hydrocarbon additives is fed into the first housing (11) through the second feed port (112).

10. The explosive mixing process according to claim 8, characterized in that, The process of feeding the nano-hydrogen additive into the second housing (21) through the fourth inlet (212) includes: 20% to 30% of the total amount of the nano hydrocarbon additive is fed into the second housing (21) through the fourth feed port (212).

11. The explosive mixing process according to claim 8, characterized in that, The process for controlling the rotation of the first stirring element (12) includes: Control the first stirring element (12) to rotate at a speed of 5-20 r / min.

12. The explosive mixing process according to claim 8, characterized in that, The explosive mixing process is applicable to the mixing system described in claim 3, wherein the first mixing device (10) of the mixing system has five nozzles (13); the explosive mixing process includes: The atomization pressures of the five nozzles (13) arranged sequentially from the first feed inlet (111) to the first discharge outlet (113) are controlled to be 1.1-1.3 MPa, 0.7-0.9 MPa, 1.1-1.3 MPa, 0.9-1.1 MPa, and 1.1-1.3 MPa, respectively; and / or, The flow rates of the five nozzles (13) arranged sequentially in the direction from the first feed inlet (111) to the first discharge outlet (113) are controlled to be 75-85 L / h, 25-35 L / h, 55-65 L / h, 35-45 L / h, and 45-55 L / h, respectively.

13. The explosive mixing process according to claim 8, characterized in that, The explosive mixing process is applicable to the mixing system described in claim 7, and the explosive mixing process includes: The material flowing out of the second discharge port (213) is controlled to enter the three-dimensional motion mixer and be mixed for a predetermined time.

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