RU2393138C1 - Installation and method of producing industrial explosives - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: group of inventions relates to industrial explosives. Disclosed is an installation for producing industrial explosives containing a solid granular oxidising agent, solid dispersed additives and liquid additives, and a method of producing industrial explosives using such an installation. The installation for producing industrial explosives has an intermittent drum mixer, a device for loading the oxidising agent, solid dispersed additives and liquid additives into the mixer and a receiving and unloading device for industrial explosives. The device for loading the oxidising agent and solid dispersed additives and the receiving and unloading device for the mixed industrial explosives are made in form of at least one container with a valve in the bottom discharge hole in form of a rotary valve. The drum mixer is placed at constant inclination to the horizontal in the operation cycle with possibility of rotation about its own axis, is made with at least one screw blade on the inner surface and is has a cylindrical bearing with perforated walls and ridges on the outer surface, where the said cylindrical bearing is fitted coaxially with an annular gap relative the mouth of the drum. The installation has apparatus for docking containers with the loading mouth of the mixer drum.

EFFECT: invention ensures quality mixture of components.

10 cl, 4 dwg, 2 ex

Description

The invention relates to the field of manufacturing industrial explosives (PVV), consisting of a solid free-flowing oxidizing agent, solid dispersed additives and liquid additives of various viscosities, in particular, to methods for manufacturing PVV and to installations for manufacturing PVV, which can be placed stationary, for example, in factory conditions or blasting sites, and can also be mobile based on the chassis of cars or in the form of block modules.

PVV are mixtures obtained by mixing various numbers of components. Known and there are compositions, which include up to a dozen components. The content of components in the mixture by weight can vary over a wide range - the difference in content can reach several orders of magnitude. In any microvolume of an ideally homogeneous mixture, from a phenomenological point of view, there should be particles of all components in quantities determined by their predetermined ratio. However, such an ideal arrangement of particles in the volume of the mixture is not actually observed. In arbitrarily selected microvolumes of the mixture, a large number of combinations of particles of various components is possible, i.e. their distribution in the mixture is random.

The quality of mixing PVV, and therefore their operational and technical properties, directly depends on the devices in which the process of mixing the components is carried out. In the production of PVV, different mixers are used according to the principle of action and design. By the nature of the duty cycle, the mixers can be periodic and continuous. The most acceptable and common for the manufacture of PVV are batch mixers. Such mixers make it possible to ensure the exact ratio between the components of the mixture and the convenience of dispensing a large number of components in a given, time-divided sequence.

According to the mechanics of material transfer, batch mixers can be divided into volumetric mixers (drum, belt and plow), mixers with mixing devices (circulation mixers), fluidized-bed mixers (diffusion mixing mixers) (Generalov MB The main processes and technology devices industrial explosives. - M.: IKC "Akademkniga", 2004, pp. 153-166).

A known installation for the continuous manufacture of ammonium nitrate explosives with a paddle drum mixer with a drum rotating around a horizontal axis (copyright certificate SU 221550, 07/01/1968, СВВ 21/00). The installation includes a device for heating ammonium nitrate, a device for melting TNT, a paddle drum mixer with a steam jacket for heating it, a device for feeding components to the mixer, and loading aluminum powder by mixing through a screw feeder located in the neck of the mixer. The method using this installation includes the following operations: heating ammonium nitrate, melting TNT, loading nitrate, molten TNT and aluminum powder into the mixer. Then the components are mixed and the resulting mixture is discharged from the mixer into the cooling apparatus. After cooling the mixture, it is fed to the screen and cork. The disadvantages of this installation should be noted the complexity of the design and special purpose with the ability to manufacture a limited range of explosives from the range of explosives, i.e. It is possible to mix only three components - ammonium nitrate, TNT and aluminum.

A known installation for the manufacture of industrial explosives, which allows to produce uniform and identical in quality portions of industrial explosives of the slurry type (patent US 3378235, 04.16.1968, C06B 21/00). The installation includes a mixing tank with a mixer, a feeder for supplying a liquid suspension with a set speed to the mixing zone, a valve for controlling the flow supplied by the feeder, as well as a feeder for feeding solid granular material and a device regulating the discharge of the finished explosive mixture from the system, in the form of a rotary valve driven, for example, using pneumatic means. The disadvantage of this installation is the low quality of mixing of the components of the PVV associated with the formation of stagnant zones in the mixing zone due to the design features of the tank and the mixing body.

A known installation for the manufacture of industrial explosives with a drum-type mixer of cyclic (periodic) action and a method of manufacturing industrial explosives using this installation (according to the patent RU 2179164, 02/10/2002, С06 В 21/00 - prototype). The installation includes metering tanks for introducing ammonium nitrate and diesel fuel, metering tanks for introducing bulk and liquid components, a drum mixer, an unloading unit. The unloading unit is made in the form of a receiving unloading hopper and measuring tanks connected to it and replaceable calibration inserts equipped with gates. The mixer drum is made in the form of two truncated cones connected by a cylinder, and is equipped on the inner surfaces of the upper cone and cylinder with three rectangular plates equally spaced from each other, installed at an angle of 30-45 ° to the axis of the mixer drum with a gap of 8-15 mm from it body, and the plate of the upper cone and cylinder are offset relative to each other by 60 °. The mixer drum is equipped with a tipping mechanism. According to the method of manufacturing PVV using this installation, the mixer drum is set to the required angle of inclination, for example, 30 °, the components are loaded from the dispenser tanks into the drum in accordance with the PVV recipe and the technical process regulations, then the mixer is turned on and mixing is carried out in a rotating drum, mixed the mixture is unloaded into the receiving and unloading hopper by tipping the drum to its lowest position when the rotation drive is turned on until it is completely released. The disadvantage of this technical solution is the need for the tipping of the drum when unloading the finished mixture, for which considerable effort must be applied to the drum to change the position of the axis of rotation of the device with the properties of a gyroscope. Accordingly, this leads to the complexity, cumbersomeness and energy intensity of the tipping mechanism design, and for drums increased to several cubic meters (tons) of capacity, the possibility of tipping is generally problematic. Extended tilting platforms are required to service tipping drum mixers. In addition, significant disadvantages are the complexity of the design of the apparatus itself and the metering devices, the need to use a separate dispenser for each component, and accordingly the need to use a large number of dispensers.

An object of the invention is to create a safe operation and maintenance of the installation, which allows to produce high-quality multicomponent PVV using components of different state of aggregation, different flowability and viscosity.

The technical result of the invention is to improve the quality of mixing due to the intensification of the mixing process as a result of optimizing the design of the mixing body, as well as providing convenience and reducing time for loading components and unloading the finished mixture by unifying the design of means for loading components and unloading the finished mixture while maintaining the required PVV production of a degree of safety without increasing the total duration of the mixer working cycle.

The technical result is achieved in the proposed installation for the manufacture of industrial explosives and in the method of manufacturing industrial explosives using the said installation.

A plant for manufacturing an industrial explosive substance containing a solid granular oxidizing agent, solid dispersed additives and liquid additives includes a batch drum, devices for loading solid granular oxidizing agent, solid dispersed additives and liquid additives into a drum mixer and a loading and unloading device for a mixed industrial explosive substances. The mixer drum is placed at a constant (non-variable) inclination in the working cycle to the horizontal with the possibility of rotation around its axis in two opposite directions, made with at least one screw blade on the inner surface and equipped with a cylindrical gap with a circular gap relative to the neck of the drum liner with perforated walls and ribs on the outer surface. A device for loading liquid additives into the drum mixer is located in the gap between the liner and the neck of the drum above the liner and / or inside the liner from the neck of the drum. Devices for loading solid granular oxidizing agent and solid dispersed additives into a drum mixer and a receiving and unloading device for mixed explosive are made in the form of at least one container. The containers are made with a bottom discharge opening with a valve located therein in the form of a rotary shutter with a pivot axis perpendicular to the central vertical axis of the discharge opening and offset relative to it within the discharge opening with the formation of a larger and smaller part in the rotary shutter. The installation comprises means for docking the containers with the loading neck of the drum of the drum mixer, which is made in the form of an unloading platform located above the loading neck of the drum with the possibility of installing each of the containers on it in turn. The unloading platform is equipped with a stop element for the rotary shutter, which ensures valve opening by turning the shutter when the container is installed on the discharge platform and the shutter interacts with the stop element with moving up (raising) most of the shutter and moving down (lowering) the smaller part of the shutter.

The cylindrical liner can be made with longitudinal ribs and an annular rib at the end from the side of the neck of the drum and placed with a protrusion relative to the neck of the drum, while the ring edge of the liner for ease of operation of the mixer (complete exclusion of spillage of contents) should not go beyond the vertical passing through the bottom neck point of the mixer drum.

The cylindrical liner from the side opposite the neck of the drum can be mounted on a shaft shank, placed along the axis of rotation of the mixer, and is equipped with a perforated plug, which can further improve the uniformity of mixing. In addition, the perforated plug can be made removable with the possibility of its movement along the axis of rotation of the mixer and the formation of an annular gap between the plug and the walls of the liner. In this case, the annular (cleaning) gap ensures the complete removal of the contents of the mixer when unloading the mixture. Moreover, in the insert for additional intensification of the mixing process, grinding bodies of a spherical, cylindrical or any arbitrary shape can be placed. The movable plug in the liner will provide easy cleaning of the drum from balls and non-crushed impurities. To clean the drum, a special hatch can also be provided in its side wall. Grinding bodies can also be made in the form of rods with a length of 0.5-1 of the length of the liner. The introduction of grinding media into the liner will enhance the effects of loosening and sifting of the supplied components, as well as provide grinding of a part of the oxidizing particles (for example, ammonium nitrate granules) throughout the entire technological cycle and enhance the distribution of the viscous additive by rubbing it and extruding through the perforation holes in the liner. For safety, grinding media can be made of intrinsically safe materials - plastics, aluminum, wood, etc. Grinding bodies made of wood can have a different shape and wear during use, and flour from them will be an additional positive component in PVV. Moreover, the placement of grinding media in the liner, and not in the cavity of the drum itself with screw blades, eliminates the problems of impacts of balls during mixing and eliminates the problems of trapping balls during unloading.

The walls of the container in the area of the discharge opening can be self-sealing in the discharge opening of the rotary valve flap on the side of its larger part and equipped with a labyrinth seal on the side of its smaller part.

The stop element for the rotary valve flap can be made in the form of a rod with a tip, and the tip and the surface of the rotary damper in the area of its contact with the tip is preferably made of materials that do not give sparks when interacting, to ensure the required level of safety in relation to the processed explosive materials. The tip can be made in the form of a roller rotating around an axis parallel to the axis of rotation of the valve flap.

A method of manufacturing an industrial explosive substance containing a solid granular oxidizing agent, solid dispersed additives and liquid additives, using for mixing the components of the installation described above for the manufacture of an industrial explosive substance, includes the following sequence of operations: at least one container is filled with a solid granular oxidizing agent and at least one container is filled with solid dispersed additives, and then into the drum drum rotating in the mixing direction, mix A solid granular oxidizing agent is loaded sequentially, for which a container with a solid granular oxidizing agent, liquid additives and solid dispersed additives are installed, for it a container with solid dispersed additives is also placed on a discharge platform, and mixed, then the resulting mixture is discharged into a container installed under the neck drum at least one container for mixed industrial explosives by rotating the drum in the discharge direction.

As the apparatus for mixing in the framework of this invention, a drum mixer is selected, the design of which is experimentally optimized to safely obtain a high-quality mixture due to various design methods and means. Moreover, the drum mixer can be made of increased capacity (5-8 m ³ ) in comparison with those currently used, which makes it possible to produce batches of high volume explosives. The mixer drum is placed at an angle to the horizontal with the possibility of rotation around its axis, and the axis of the drum is inclined relative to the horizontal and coincides with the axis of its rotation. In this case, the angle of inclination can be set based on the rheological properties of the specific PVV formulation with achieving the best mixing quality, but during the working cycle, the angle of inclination of the axis of rotation does not change. Installing the mixer horizontally complicates its design, as at the same time, to ensure a more complete loading of the mixer, it is necessary to ensure the tightness of the loading neck of the mixer drum, and installing the mixer vertically does not provide the required quality of mixing. For ease of unloading, the drum is rotatable in two opposite directions, which can be realized by equipping the drum with a reversible drive. The mixing of components in the drum occurs during rotation of the drum due to mixing bodies, which are: at least one screw blade made on the inner surface of the drum (when rotating in one direction, mixing occurs, and when rotating in the other direction, the mixed mixture is unloaded through the loading neck drum), and a cylindrical liner (in the form of a pipe) with ribs on the outer surface and perforated walls, placed coaxially with an annular gap relative to the mountains drum grooves. An insert with perforated walls provides additional loosening of bulk components when they are fed into the mixer for mixing, which may eliminate the need for separate loosening and even sieving operations. In addition, the perforated walls of the liner provide a more uniform distribution of bulk products (especially combustible powders) in the mixture when mixed. The ribbed outer surface of the walls of the liner in combination with the perforation of the walls provides a uniform distribution of liquid additives in the volume of prepared PVV when they are fed into the liner. This is especially important in the manufacture of PVV using porous nitrate with a high, more than 6%, oil absorption. The liquid additive will spread over the liner and enter through the perforated walls of the liner into the drum cavity between the drum and the liner in the form of drops. Devices for loading liquid additives into the drum mixer can be placed in the gap between the liner above the liner and the neck of the drum and / or inside the liner from the neck of the drum. This is intended to ensure uniform mixing of the PVV components when using liquid additives with different viscosities. In PVV, several liquid additives with different viscosities can be used simultaneously. Highly viscous liquid additives, for example, such as emulsions, are preferably introduced into the liner. In all of these options for loading liquid additives, the ribbed outer surface and perforation of the walls of the liner ensure that the liquid spreads over the surface of the liner and, accordingly, the uniformity of distribution in the mixed mixture.

The use in the design of the installation of universal identical containers as devices for loading solid granular oxidizer and solid dispersed additives, as well as receiving and unloading devices for finished mixed industrial explosives, allows us to simplify the process of preparing batches of initial components and makes it possible to separate it in time and in space from the main mixing process. The same design feature allows you to increase the manufacturability of the process of accumulation of finished PVV, makes it possible to separate it in time and in space from the packaging process. In other words, the operations of unloading loose components from soft packs, their preliminary preparation - loosening, sieving, weighing, etc. can be carried out in advance, in a separate place, and in this case, prepared samples of the starting components will be transported in universal containers to the location of the installation for direct dosing and manufacture of PVC. Due to the fact that the PVV formulations are very different in the number and set of components, within the framework of the proposed installation, the transition from the manufacture of one PVV formulation to another is very simple and convenient due to the use of universal, interchangeable containers, the number of which can vary. The number of containers used in the installation may correspond to the number of components of the UIP, and it is also possible to use one container for all manipulations (including loading components into the mixer and receiving mixed UIP). In addition, the packaging of the finished PVV can be carried out both immediately after its preparation at the place of production of the explosive, and in a convenient time and place by transporting the finished PVV in universal containers to the place of subsequent processing (bagging, loading into a transport-charging car).

The containers can be made in any form convenient for specific production conditions (conical, cylindrical, cylindrical, etc.) and are moved in the working cycle by means of lifting mechanisms.

A special advantage of containers is the valve, which allows safe loading of the contents of the container through the loading neck into the mixer drum for further mixing of the components, and after collecting and accumulating the finished PVC in the container, it is fed to the packaging or to the transport-charging machine. Means for docking containers with the loading neck of the mixer drum is made in the form of an unloading platform with the possibility of installing containers on it. In addition, a similar docking tool can be used to dock containers with loading necks of the receiving devices of machines and apparatuses for the subsequent processing of the finished PVV. The unloading platform is located above the loading neck of the mixer drum, a container is installed on the unloading platform, while the container valve opens due to the interaction of the rotary damper and the stop located on the unloading platform, and the contents of the container are unloaded into the mixer.

The valve is located in the bottom discharge opening of the container and is made in the form of a rotary damper with the possibility of its rotation around an axis located in the plane of the damper perpendicular to the central vertical axis of the discharge opening and offset relative to it within the discharge opening. Those. the axis of rotation of the damper is offset relative to the midline of the damper and divides it into two unequal parts - the larger and smaller parts. When the container is installed on the unloading platform, the valve opens due to the interaction of the shutter with a stop located on the unloading platform so that most of the rotary shutter rises up when the shutter is rotated, and a smaller part of the rotary shutter falls down. This embodiment of the shutter provides the effect of its self-sealing when the container is loaded with the processed material under the action of gravity and, at the same time, reduces the force required to open the shutter, and ensures the expiration of the contents of the container with additional averaging and mixing of the product. Moreover, after unloading its contents from the container and removing the container from the unloading platform, the valve self-closes, while most of the shutter falls by gravity and as a result of rotation, and the lower one rises. The rotary damper can be made in any shape convenient for a particular production: round, square, concave, etc.

The invention is illustrated in FIGS. 1-4.

Figure 1 shows a sectional view of a container with a valve located in its "closed" position located in its bottom discharge opening.

Figure 2 shows a sectional view of a container mounted on an unloading platform with a valve located in its open position in its bottom discharge opening.

Figure 3 shows a sectional view of a drum mixer.

Figure 4 shows a General view of the installation for the manufacture of PVC.

1-4, the positions indicated:

1 - container

2 - rotary damper

3 - axis of rotation of the rotary damper

4 - the Central vertical axis of the discharge opening of the container

5 - unloading platform

6 - an emphasis for a rotary damper

7 - drum mixer

8 - loading neck of the drum of the drum mixer

9 - cylindrical liner

10 - perforation holes in a cylindrical liner

11 - screw blade

12 - a device for loading liquid additives in a drum mixer, located in the gap between the liner and the neck of the drum above the liner

13 - a device for loading liquid additives, placed inside the liner from the neck of the drum

14 - container with solid bulk oxidizing agent

15 - container with solid dispersed additive

16 - container for mixed explosives

α - tilt angle of the mixer drum

Installation for the manufacture of PVV (see figure 4) works as follows.

Solid bulk oxidizing agent, for example ammonium nitrate, incl. of various grades and varieties, from the factory packaging is loaded into a container 14 (moreover, in the case of using several oxidizing agents, the number of containers may be different or the oxidizing agents can be unpacked in a predetermined ratio into one container). A solid dispersed additive (for example, coal or aluminum powder) is loaded into the container 15. The drum mixer 7 is turned on with rotation in the mixing direction (the desired direction of rotation is determined by the screw blade 11 on the inner surface of the drum) (see also FIG. 3). The container 14 with solid bulk oxidizing agent is installed on the unloading platform 5, located above the neck of the mixer drum 8, while the rotary valve 2 of the valve, when interacting with the stop 6 of the unloading platform, is turned (the valve is moved from the closed position to the open position, see FIG. 1, 2) and the contents of the container are poured into the rotating drum of the drum mixer 7. After unloading, the container 14 is removed from the discharge site 5 (in the case of using several oxidizing agents in several containers each from containers is sequentially unloaded into the mixer). As a result of the rotation of the drum, grinding (loosening) of possible pieces (agglomerates) of the oxidizing agent occurs according to the principle of self-grinding in drum mills. This effect is enhanced when equipping the liner with the opposite side of the neck of the drum with a plug, and even more so when grinding media are introduced into the liner. After a predetermined time, which is selected experimentally for each PVV composition, a liquid additive is fed into the drum mixer during its continuous rotation by means of a device 12 for loading liquid additives into the drum mixer located above the insert in the gap between the insert and the neck of the drum and / or through the device 13 for loading liquid additives, placed inside the liner from the neck of the drum. Moreover, highly viscous liquid additives, as indicated above, it is preferable to dose inside the liner. After that, also during continuous rotation of the drum, a solid dispersed additive (e.g. coal) is fed into the mixer. For this, the container 15 with the solid dispersed additive is placed on the unloading platform 5. The rotary valve 2 of the valve, when interacting with the stop 6 of the unloading platform 5, rotates and, accordingly, the valve is put into the “open” position. The contents of the container 15 are poured into the drum of the drum mixer 7. After this, the components loaded into the drum mixer 7 are mixed for a certain period of time, which is experimentally selected for each composition of the UIP. At the end of mixing, the rotation of the mixer drum in the mixing direction is stopped and the rotation of the drum in the opposite direction, in the discharge direction, is turned on. In the unloading mode, the finished mixture is displaced from the drum by helical blades and is poured into a container 16 for mixed PVV installed under the neck 8 of the mixer drum. After the finished PVV is completely unloaded from the drum mixer, the rotation of the drum is stopped. A filled PVV container is moved to the loading point in the charging machine or to the packaging place. The unloading of the UIP from the container is also carried out through the bottom valve using the same unloading platform described above, either using other mechanized means or manually. If necessary, the described manufacturing cycle of the UIP can be repeated the required number of times.

Examples of a method for manufacturing an industrial explosive:

Example 1

Production of PVV type "granulite" (granulites D-5, UP, A-6, T, etc.)

Granular ammonium nitrate as a solid granular oxidizing agent is unpacked from the factory packaging, loading into a container. Coal powder as a solid dispersed additive solid granular oxidizing agent is loaded into another container. Then, in the drum of the drum mixer during its rotation in the mixing direction, ammonium nitrate, a liquid additive (diesel fuel) and a solid dispersed additive (coal powder) are sequentially loaded. To load ammonium nitrate and coal powder, the appropriate container is installed on the unloading site. The liquid additive is supplied through a dispensing device. After loading the components into the drum mixer, mixing is performed. Upon completion of mixing, the resulting mixture is unloaded into a container installed under the neck of the mixer drum by rotating the drum in the discharge direction. The container filled with the prepared mixture of PVV is moved to the place of the subsequent processing of the PVV (for loading into a transport-charging machine or into packing-patroning devices).

Example 2

Production of composite type PVV in the form of a mixture of granular phase and emulsion (type Granemit, Heavy ANFO or Emulan explosives)

Granular ammonium nitrate as a solid granular oxidizing agent is unpacked from the factory packaging, loading into a container. One or more solid additives are unpacked into one or more containers. Ammonium nitrate, liquid additives are sequentially loaded into the mixer drum when it is rotated in the mixing direction (first diesel fuel is supplied through the device for loading liquid additives located in the gap between the neck of the drum and the liner, and then the emulsion is fed through the device for loading liquid additives located inside the liner) and then solid additives (coal powder, aluminum powder). To load ammonium nitrate and coal powder, the appropriate container is installed on the unloading site. After loading the components into the drum mixer, mixing is performed. Upon completion of mixing, the resulting mixture is unloaded into a container installed under the neck of the mixer drum by rotating the drum in the discharge direction. The container filled with the prepared mixture of PVV is moved to the place of the subsequent processing of the PVV.

Thus, the use of the proposed design of the installation in the manufacture of PVV allows to produce high-quality multicomponent PVV, including increased batches, using components of different state of aggregation, different flowability and viscosity without increasing the overall duration of the installation cycle compared to the known ones. Due to the use of unified containers, the installation is safe to operate, easy to maintain, the time required to load components into the mixer and unload the mixed mixture from the mixer in the proposed installation is significantly less than in known plants. In addition, the transition from one formulation of PVV to another is not a time-consuming process and has technological difficulties.

Claims (10)

1. Installation for the manufacture of industrial explosives containing a solid granular oxidizing agent, solid dispersed additives and liquid additives, including a batch drum mixer, a device for loading a solid granular oxidizing agent, solid dispersed additives and liquid additives into a drum mixer and a loading and unloading device for mixed industrial explosive, characterized in that the drum of the drum mixer is placed at a constant inclination in the working cycle to the horizontal with with the possibility of rotation around its axis in two opposite directions, made with at least one screw blade on the inner surface and equipped with a cylindrical insert with perforated walls and ribs on the outer surface mounted coaxially with the annular gap relative to the neck of the drum, a device for loading liquid additives into the drum mixer is placed in the gap between the liner and the neck of the drum above the liner and / or inside the liner from the neck of the drum, a device for loads of solid granular oxidizer and solid dispersed additives in a drum mixer and a receiving and unloading device for mixed explosives are made in the form of at least one container with a valve in the bottom discharge opening in the form of a rotary damper with an axis of rotation perpendicular to the central vertical axis of the discharge opening and offset relative to it within the discharge opening with the formation, respectively, of the larger and smaller parts of the rotary damper, and with the means ki with a loading neck of a drum of a drum mixer, made in the form of an unloading platform, placed above the loading neck of a drum with the possibility of installing each container on it one by one and equipped with a stop element for a rotary shutter, which opens the valve by turning the shutter when the container is installed on the unloading platform and interacting shutters with a stop element with upward movement of the greater part of the shutter and downward movement of the smaller part of the shutter. 2. Installation according to claim 1, characterized in that the cylindrical liner is made with longitudinal ribs and an annular rib at the end from the side of the neck of the drum and placed with a protrusion relative to the neck of the drum, while the annular rib of the liner is made without going beyond the vertical passing through the lower point of the neck of the drum. 3. Installation according to claim 1, characterized in that the cylindrical liner on the side opposite to the neck of the drum is mounted on a shaft end located along the axis of rotation of the mixer and is equipped with a perforated plug. 4. Installation according to claim 1, characterized in that the cylindrical liner from the side opposite the neck of the drum is mounted on a shaft end located along the axis of rotation of the mixer, and is equipped with a perforated plug made with the possibility of its movement along the axis of rotation of the mixer and the formation of an annular gap between the plug and the walls of the liner. 5. Installation according to claim 4, characterized in that grinding bodies, for example, spherical or cylindrical, are placed in a cylindrical insert. 6. Installation according to claim 4, characterized in that grinding bodies are made in the form of rods, the length of which is 0.5-1 of the length of the insert, in a cylindrical insert. 7. Installation according to claim 1, characterized in that the walls of the container in the area of the discharge opening are self-sealing in the discharge opening of the rotary valve flap from the larger part and are equipped with a labyrinth seal from the smaller part. 8. Installation according to claim 1, characterized in that the thrust element for the rotary valve flap is made in the form of a rod with a tip, and the tip and the surface of the rotary valve in the area of its contact with the tip are made of materials that do not give sparks during interaction. 9. Installation according to claim 8, characterized in that the tip is made in the form of a roller rotating around an axis parallel to the axis of rotation of the valve flap. 10. A method of manufacturing an industrial explosive containing a solid granular oxidizing agent, solid dispersed additives and liquid additives, comprising mixing the components in a drum of a drum mixer of an industrial explosive manufacturing apparatus according to any one of claims 1 to 9, wherein at least one container is filled solid bulk oxidizing agent and at least one container is filled with solid dispersed additives, and then into the drum rotating in the mixing direction, the drum mixer is loaded with therefore, a solid bulk oxidizing agent, for which a container with a solid bulk oxidizing agent, liquid additives and solid dispersed additives are placed on the discharge platform, for which a container with solid dispersed additives is installed on the discharge platform and mixed, then the resulting mixture is discharged into at least a drum neck one container for mixed industrial explosives by rotating the drum in the discharge direction.

Images