Four-kiln feeding distribution system

Abstract

The invention provides a four-kiln feeding distribution system, and relates to the technical field of quick lime production. The feeding distribution system based on the four kilns comprises a stone feeding conveying belt, a coal feeding conveying belt, a stone metering hopper, a coal metering hopper, a coal discharging conveying belt, a mixing conveying belt, an elevator, a kiln top conveying belt, a material distributing valve, a transverse conveying belt, a first forward and reverse rotation conveying belt, a second forward and reverse rotation conveying belt and a machine room control system. After the metering hopper is used for quantifying, preliminary mixing is carried out while dispersing and discharging are carried out through cooperation of the two conveying belts, further uniform mixing is carried out in following conveying belt blanking, a mixing procedure does not need to be added, the feeding working hours are saved, and the production efficiency is improved. And meanwhile, through the arrangement of a flap valve and a positive and negative rotation conveying belt, the tail end conveying path can be changed through a machine room control system, feeding distribution of a plurality of kilns is facilitated, and after the firing time and the feeding time of the kilns are reasonably planned, the feeding requirements of four kilns can be met only through one set of feeding equipment.

Description

Technical Field

[0001] The invention relates to the technical field of quicklime production, in particular to a four-kiln feed distribution system. Background Art

[0002] The main component of limestone is calcium carbonate (CaCO3). Lime and limestone are raw materials used in large quantities in building materials and industry. Limestone can be directly processed into stone and burned into quicklime, which is CaO. As an industrial raw material, it can be used to produce industrial products such as slaked lime, gypsum powder, and cement. It can also be directly used as a raw material for the production of heating packs and other products. It has a wide range of industrial uses. In the production of calcium oxide, it is generally necessary to mix limestone with coal blocks as fuel and pour them into the kiln together.

[0003] In order to ensure the stability of the production quality of calcium oxide, quantitative weighing is required before the limestone is fed in, which is convenient for the quantitative addition of coal and ensures the firing effect of the kiln. The existing measuring bucket is generally a tipping bucket, which can only be poured out once after weighing, resulting in the coal being added manually after a one-time weighing, and a mixer is required to mix the coal again. Only after the stone and coal are evenly mixed can they be put into the kiln for firing. The process is cumbersome and the degree of automation is low, which reduces the feeding efficiency. It can only meet the feeding needs of two kilns at most at one time, and cannot meet the needs of enterprise expansion and development. Therefore, a four-kiln feeding distribution system suitable for automated production is urgently needed. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a four-kiln feed distribution system, which solves the problems of the existing lime burning feeding system having complicated procedures, low degree of automation, reduced feeding efficiency, and being able to meet the feeding needs of only two kilns at a time, and being unable to meet the needs of enterprise expansion and development.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a four-kiln feed distribution system, including a stone feed conveyor belt, a coal feed conveyor belt, a stone metering hopper, a coal metering hopper, a coal discharge conveyor belt, a mixing conveyor belt, an elevator, a kiln top conveyor belt, a material distribution valve, a transverse conveyor belt, a first forward and reverse conveyor belt, a second forward and reverse conveyor belt and a machine room control system, the discharge end of the stone feed conveyor belt is arranged above the stone metering hopper, the discharge end of the coal feed conveyor belt is arranged above the coal metering hopper, the feed end of the mixing conveyor belt is arranged below the bottom discharge end of the stone metering hopper, the coal discharge conveyor belt is arranged below the bottom discharge end of the coal metering hopper, and the The discharging end is arranged above the middle part of the mixing conveyor belt, the discharging end of the mixing conveyor belt is arranged above the bottom feeding end of the elevator, a kiln top conveyor belt is arranged below the top discharging end of the elevator, a dividing valve is arranged below the discharging end of the kiln top conveyor belt, the dividing valve is provided with a first discharging end and a second discharging end, the lower part of the first discharging end is arranged above the middle part of the first forward and reverse conveyor belt, the feeding end of the transverse conveyor belt is arranged below the second discharging end, the discharging end of the transverse conveyor belt is arranged above the middle part of the second forward and reverse conveyor belt, kiln No. 1 and kiln No. 2 are respectively arranged at both ends of the first forward and reverse conveyor belt, and kiln No. 3 and kiln No. 4 are respectively arranged at both ends of the second forward and reverse conveyor belt.

[0008] Preferably, the stone feed conveyor belt, coal feed conveyor belt, stone measuring hopper, coal measuring hopper, coal discharge conveyor belt, mixing conveyor belt, elevator, kiln top conveyor belt, material dividing valve, transverse conveyor belt, first forward and reverse conveyor belt, and second forward and reverse conveyor belt are all electrically connected to the machine room control system.

[0009] Preferably, the top feed ends of the No. 1 kiln, the No. 2 kiln, the No. 3 kiln and the No. 4 kiln are all provided with level meters, and the multiple level meters are all electrically connected to the machine room control system.

[0010] The system operation steps of the computer room control system are as follows:

[0011] S1. Before feeding, the large limestone as raw material is first crushed by a crusher, and the coal as fuel and reducing agent is wetted by a water spraying device. The crushed stone and wetted coal are respectively transported to the stone weighing hopper and the coal weighing hopper through the stone feeding conveyor belt and the coal feeding conveyor belt. When the stone weighing hopper and the coal weighing hopper reach the weight threshold, the machine room control system controls the corresponding stone feeding conveyor belt and the coal feeding conveyor belt to stop feeding;

[0012] S2. When the machine room control system detects that a kiln is in a material shortage state through the material level meter of a kiln, the machine room control system controls the stone material weighing hopper and the coal material weighing hopper to discharge materials through the mixing conveyor belt and the coal material discharging conveyor belt respectively;

[0013] S3. When the mixing conveyor belt is conveying the stone, the coal is spread on the upper layer of the stone through the coal discharging conveyor belt above the mixing conveyor belt, and then conveyed to the elevator;

[0014] S4. When the mixing conveyor belt transports the materials to the elevator, the materials naturally fall into the hopper of the elevator, and the materials are stacked to form a re-mixing effect;

[0015] S5. After the weight of the stone material weighing hopper and the coal material weighing hopper returns to zero and all the materials are sent to the hopper of the elevator, the machine room control system controls the mixing conveyor belt and the coal material discharging conveyor belt to stop discharging materials, and restarts the stone material feeding conveyor belt and the coal material feeding conveyor belt to feed materials, while the elevator works to lift the materials;

[0016] S6. After the hoist lifts the material, it naturally falls onto the kiln top conveyor belt, and is transported to the material distribution valve through the kiln top conveyor belt. The first discharge end or the second discharge end is opened according to the position of the kiln in the material shortage state, and then the material is directly dropped onto the first forward and reverse conveyor belt or dropped onto the second transverse conveyor belt through the transverse conveyor belt;

[0017] S7. After receiving the falling material, the first forward and reverse conveyor belt or the second transverse conveyor belt starts to rotate forward or reverse to bring the material to the corresponding kiln in the shortage state. After the falling material is completed, the elevator automatically resets.

[0018] (III) Beneficial effects

[0019] The present invention provides a four-kiln feed distribution system. It has the following beneficial effects:

[0020] 1. After quantitative measurement by a metering bucket, the present invention performs preliminary mixing while dispersing and discharging materials through the cooperation of two conveyor belts, and further mixes the materials during subsequent conveyor belt discharge, without adding a mixing process, thus saving feeding time. Meanwhile, the terminal conveying path can be changed by the machine room control system through the setting of a flap valve and a forward and reverse conveyor belt, which is convenient for the feeding distribution of multiple kilns. After reasonable planning of the firing time and feeding time of the kilns, only one set of feeding equipment can be used to meet the feeding needs of four kilns, which has certain innovation.

[0021] 2. Compared with the solution of directly setting another forward and reverse conveyor belt above two forward and reverse conveyor belts, the present invention can set the feed lifting mechanism at one end of the two kilns through the setting of the dividing valve and the transverse conveyor belt, without affecting the construction of the two kilns behind. It has the advantage of being able to carry out the project in stages, and carrying out the second phase of the project construction while putting two kilns into production in the early stage. The enterprise has less pressure on initial investment and collection of funds, which is suitable for the production expansion of small and micro enterprises, and increases the innovation of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the system flow of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1:

[0025] like Figure 1 As shown, an embodiment of the present invention provides a four-kiln feed distribution system, including a stone feed conveyor belt, a coal feed conveyor belt, a stone metering hopper, a coal metering hopper, a coal discharge conveyor belt, a mixing conveyor belt, an elevator, a kiln top conveyor belt, a material distribution valve, a transverse conveyor belt, a first forward and reverse conveyor belt, a second forward and reverse conveyor belt and a machine room control system, wherein the discharge end of the stone feed conveyor belt is arranged above the stone metering hopper, the discharge end of the coal feed conveyor belt is arranged above the coal metering hopper, and the feed end of the mixing conveyor belt is arranged above the stone metering hopper. The material end is arranged below the bottom discharge end of the stone material measuring hopper, the coal material discharge conveyor belt is arranged below the bottom discharge end of the coal material measuring hopper, the discharge end of the coal material discharge conveyor belt is arranged above the middle of the mixing conveyor belt, and the discharge end of the mixing conveyor belt is arranged above the bottom feeding end of the elevator. After quantitative measurement by the measuring hopper, the present invention performs preliminary mixing while dispersing and discharging the materials through the cooperation of the two conveyor belts, and further mixes them in the subsequent conveyor belt dropping, without adding a mixing process, saving feeding time;

[0026] A kiln top conveyor belt is arranged below the top discharge end of the elevator, a dividing valve is arranged below the discharge end of the kiln top conveyor belt, the dividing valve is arranged with a first discharge end and a second discharge end, the first discharge end is arranged below the middle part of the first forward and reverse conveyor belt, the feeding end of the transverse conveyor belt is arranged below the second discharge end, the discharge end of the transverse conveyor belt is arranged above the middle part of the second forward and reverse conveyor belt, the stone feeding conveyor belt, the coal feeding conveyor belt, the stone weighing hopper, the coal weighing hopper, the coal discharging conveyor belt, the mixing conveyor belt, the elevator, the kiln top conveyor belt, the dividing valve, the transverse conveyor belt, the first forward and reverse conveyor belt, and the second forward and reverse conveyor belt are all electrically connected to the machine room control system, and the two ends of the first forward and reverse conveyor belt are divided into Kiln No. 1 and Kiln No. 2 are separately arranged, Kiln No. 3 and Kiln No. 4 are respectively arranged at both ends of the second forward and reverse conveyor belt, and level meters are arranged at the top feeding ends of Kiln No. 1, Kiln No. 2, Kiln No. 3 and Kiln No. 4, and multiple level meters are electrically connected to the machine room control system. Through the arrangement of the dividing valve and the transverse conveyor belt, compared with the scheme of directly arranging a forward and reverse conveyor belt above the two forward and reverse conveyor belts, the feed lifting mechanism can be arranged at one end of the two kilns without affecting the construction of the latter two kilns. It has the advantage of being able to carry out the project in stages, and carrying out the second phase of the project construction while putting the two kilns into production in the early stage. The enterprise has less pressure on initial investment and repayment, which is suitable for the production expansion of small and micro enterprises, and increases the innovation of the present invention.

[0027] The system operation steps of the computer room control system are:

[0028] S1. Before feeding, the large limestone as raw material is first crushed by a crusher, and the coal as fuel and reducing agent is wetted by a water spraying device. The crushed stone and wetted coal are respectively transported to the stone weighing hopper and the coal weighing hopper through the stone feeding conveyor belt and the coal feeding conveyor belt. When the stone weighing hopper and the coal weighing hopper reach the weight threshold, the machine room control system controls the corresponding stone feeding conveyor belt and the coal feeding conveyor belt to stop feeding;

[0029] S2. When the machine room control system detects that the kiln is in a material shortage state through the material level meter of kiln No. 1, the machine room control system controls the stone material weighing hopper and the coal material weighing hopper to discharge materials through the mixing conveyor belt and the coal material discharging conveyor belt respectively;

[0030] S3. When the mixing conveyor belt is conveying the stone, the coal is spread on the upper layer of the stone through the coal discharging conveyor belt above the mixing conveyor belt, and then conveyed to the elevator;

[0031] S4. When the mixing conveyor belt transports the materials to the elevator, the materials naturally fall into the hopper of the elevator, and the materials are stacked and mixed again;

[0032] S5. After the weight of the stone material weighing hopper and the coal material weighing hopper returns to zero and all the materials are sent to the hopper of the elevator, the machine room control system controls the mixing conveyor belt and the coal material discharging conveyor belt to stop discharging materials, and restarts the stone material feeding conveyor belt and the coal material feeding conveyor belt to feed materials, while the elevator works to lift the materials;

[0033] S6, after the hoist lifts the material, it naturally falls onto the kiln top conveyor belt, and is transported to the material distribution valve through the kiln top conveyor belt. The first discharging end is opened according to the position of the kiln No. 1 in the material shortage state, and then the material is directly dropped onto the first forward and reverse conveyor belt;

[0034] S7. After receiving the falling material, the first forward and reverse conveyor belt starts to rotate forward to bring the material to the No. 1 kiln in the corresponding material shortage state. After the falling material is completed, the elevator automatically resets.

[0035] Embodiment 2:

[0036] The difference between this embodiment and the first embodiment is that when the No. 2 kiln sends a material shortage signal, the system operation steps of the machine room control system are as follows:

[0037] S1. Before feeding, the large limestone as raw material is first crushed by a crusher, and the coal as fuel and reducing agent is wetted by a water spraying device. The crushed stone and wetted coal are respectively transported to the stone weighing hopper and the coal weighing hopper through the stone feeding conveyor belt and the coal feeding conveyor belt. When the stone weighing hopper and the coal weighing hopper reach the weight threshold, the machine room control system controls the corresponding stone feeding conveyor belt and the coal feeding conveyor belt to stop feeding;

[0038] S2. When the machine room control system detects that the kiln No. 2 is in a material shortage state through the material level meter of the kiln, the machine room control system controls the stone material weighing hopper and the coal material weighing hopper to discharge materials through the mixing conveyor belt and the coal material discharging conveyor belt respectively;

[0039] S3. When the mixing conveyor belt is conveying the stone, the coal is spread on the upper layer of the stone through the coal discharging conveyor belt above the mixing conveyor belt, and then conveyed to the elevator;

[0040] S4. When the mixing conveyor belt transports the materials to the elevator, the materials naturally fall into the hopper of the elevator, and the materials are stacked to form a re-mixing effect;

[0041] S5. After the weight of the stone material weighing hopper and the coal material weighing hopper returns to zero and all the materials are sent to the hopper of the elevator, the machine room control system controls the mixing conveyor belt and the coal material discharging conveyor belt to stop discharging materials, and restarts the stone material feeding conveyor belt and the coal material feeding conveyor belt to feed materials, while the elevator works to lift the materials;

[0042] S6, after the hoist lifts the material, it naturally falls onto the kiln top conveyor belt, and is transported to the material distribution valve through the kiln top conveyor belt. The first discharging end is opened according to the position of the No. 2 kiln in the material shortage state, and then the material is directly dropped onto the first forward and reverse conveyor belt;

[0043] S7. After receiving the falling material, the first forward and reverse conveyor belt starts to reverse and brings the material to the kiln in the corresponding material shortage state. After the falling material is completed, the elevator automatically resets.

[0044] Embodiment three:

[0045] The difference between this embodiment and the first embodiment is that when the No. 3 kiln sends a material shortage signal, the system operation steps of the machine room control system are as follows:

[0046] S1. Before feeding, the large limestone as raw material is first crushed by a crusher, and the coal as fuel and reducing agent is wetted by a water spraying device. The crushed stone and wetted coal are respectively transported to the stone weighing hopper and the coal weighing hopper through the stone feeding conveyor belt and the coal feeding conveyor belt. When the stone weighing hopper and the coal weighing hopper reach the weight threshold, the machine room control system controls the corresponding stone feeding conveyor belt and the coal feeding conveyor belt to stop feeding;

[0047] S2. When the machine room control system detects that the kiln is in a material shortage state through the material level meter of the kiln No. 3, the machine room control system controls the stone material weighing hopper and the coal material weighing hopper to discharge materials through the mixing conveyor belt and the coal material discharging conveyor belt respectively;

[0048] S3. When the mixing conveyor belt is conveying the stone, the coal is spread on the upper layer of the stone through the coal discharging conveyor belt above the mixing conveyor belt, and then conveyed to the elevator;

[0049] S4. When the mixing conveyor belt transports the materials to the elevator, the materials naturally fall into the hopper of the elevator, and the materials are stacked and mixed again;

[0050] S5. After the weight of the stone material weighing hopper and the coal material weighing hopper returns to zero and all the materials are sent to the hopper of the elevator, the machine room control system controls the mixing conveyor belt and the coal material discharging conveyor belt to stop discharging materials, and restarts the stone material feeding conveyor belt and the coal material feeding conveyor belt to feed materials, while the elevator works to lift the materials;

[0051] S6, after the hoist lifts the material, it naturally falls onto the kiln top conveyor belt, and is transported to the material distribution valve through the kiln top conveyor belt. The second discharge end is opened according to the position of the No. 3 kiln with a shortage of material, and then the material falls to the second transverse conveyor belt through the transverse conveyor belt;

[0052] S7. After receiving the falling materials, the second transverse conveyor belt starts to rotate forward to bring the materials to the No. 3 kiln corresponding to the shortage of materials. After the falling of materials is completed, the elevator automatically resets.

[0053] Embodiment 4:

[0054] The difference between this embodiment and the first embodiment is that when the fourth kiln sends out a material shortage signal, the system operation steps of the machine room control system are as follows:

[0055] S1. Before feeding, the large limestone as raw material is first crushed by a crusher, and the coal as fuel and reducing agent is wetted by a water spraying device. The crushed stone and wetted coal are respectively transported to the stone weighing hopper and the coal weighing hopper through the stone feeding conveyor belt and the coal feeding conveyor belt. When the stone weighing hopper and the coal weighing hopper reach the weight threshold, the machine room control system controls the corresponding stone feeding conveyor belt and the coal feeding conveyor belt to stop feeding;

[0056] S2. When the machine room control system detects that the kiln No. 4 is in a material shortage state through the material level meter of the kiln, the machine room control system controls the stone material weighing hopper and the coal material weighing hopper to discharge materials through the mixing conveyor belt and the coal material discharging conveyor belt respectively;

[0057] S3. When the mixing conveyor belt is conveying the stone, the coal is spread on the upper layer of the stone through the coal discharging conveyor belt above the mixing conveyor belt, and then conveyed to the elevator;

[0058] S4. When the mixing conveyor belt transports the materials to the elevator, the materials naturally fall into the hopper of the elevator, and the materials are stacked and mixed again;

[0059] S5. After the weight of the stone material weighing hopper and the coal material weighing hopper returns to zero and all the materials are sent to the hopper of the elevator, the machine room control system controls the mixing conveyor belt and the coal material discharging conveyor belt to stop discharging materials, and restarts the stone material feeding conveyor belt and the coal material feeding conveyor belt to feed materials, while the elevator works to lift the materials;

[0060] S6, after the hoist lifts the material, it naturally falls onto the kiln top conveyor belt, and is transported to the material distribution valve through the kiln top conveyor belt. The second discharge end is opened according to the position of the No. 4 kiln with a shortage of material, and then the material falls to the second transverse conveyor belt through the transverse conveyor belt;

[0061] S7, after receiving the falling materials, the second transverse conveyor belt starts to reverse and brings the materials to the kiln in the corresponding material shortage state. After the falling materials are completed, the elevator automatically resets;

[0062] By setting up flap valves and corresponding forward and reverse conveyor belts, the machine room control system can be used to change the terminal conveying path, which is convenient for the feeding distribution of multiple kilns. After reasonable planning of the firing time and feeding time of the kilns, only one set of feeding equipment can be used to meet the feeding needs of four kilns.

[0063] Working principle: When working, the present invention can use the metering bucket to determine the quantity and then use the cooperation of two conveyor belts to carry out preliminary mixing while dispersing and discharging the materials, and further mix them during the subsequent conveyor belt discharge. There is no need to add a mixing process, which saves feeding time. At the same time, through the setting of the flap valve and the forward and reverse conveyor belts, the terminal conveying path can be changed by the machine room control system, which is convenient for the feeding distribution of multiple kilns. After the specifications of the kiln, the discharging time, the firing time and the single feeding time are reasonably planned, the feeding work of the other three kilns can be completed during the time when a kiln completes a firing process. Only one set of feeding equipment can meet the feeding needs of four kilns.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A four-kiln feed distribution system, including a stone feed conveyor belt, a coal feed conveyor belt, a stone metering hopper, a coal metering hopper, a coal discharge conveyor belt, a mixing conveyor belt, a hoist, a kiln top conveyor belt, a material distribution valve, a transverse conveyor belt, a first forward and reverse conveyor belt, a second forward and reverse conveyor belt and a machine room control system, characterized in that: The discharge end of the stone feeding conveyor belt is arranged above the stone weighing hopper, the discharge end of the coal feeding conveyor belt is arranged above the coal weighing hopper, the feeding end of the mixing conveyor belt is arranged below the bottom discharge end of the stone weighing hopper, the coal discharge conveyor belt is arranged below the bottom discharge end of the coal weighing hopper, the discharge end of the coal discharge conveyor belt is arranged above the middle of the mixing conveyor belt, the discharge end of the mixing conveyor belt is arranged above the bottom feeding end of the elevator, and a kiln top conveyor is arranged below the top discharge end of the elevator. A feeding belt is provided, a dividing valve is arranged below the discharging end of the kiln top conveyor belt, the dividing valve is provided with a first discharging end and a second discharging end, the first discharging end is arranged below the middle part of the first forward and reverse conveyor belt, the feeding end of the transverse conveyor belt is arranged below the second discharging end, the discharging end of the transverse conveyor belt is arranged above the middle part of the second forward and reverse conveyor belt, kiln No. 1 and kiln No. 2 are arranged at both ends of the first forward and reverse conveyor belt respectively, kiln No. 3 and kiln No. 4 are arranged at both ends of the second forward and reverse conveyor belt respectively.

2. A four-furnace feed distribution system according to claim 1, characterized in that: The stone feeding conveyor belt, coal feeding conveyor belt, stone measuring hopper, coal measuring hopper, coal discharging conveyor belt, mixing conveyor belt, elevator, kiln top conveyor belt, material dividing valve, transverse conveyor belt, first forward and reverse conveyor belt, and second forward and reverse conveyor belt are all electrically connected to the machine room control system.

3. A four-furnace feed distribution system according to claim 1, characterized in that: The top feed ends of the No. 1 kiln, the No. 2 kiln, the No. 3 kiln and the No. 4 kiln are all provided with material level meters, and the multiple material level meters are all electrically connected to the machine room control system.

4. A four-furnace feed distribution system according to any one of claims 1 to 3, characterized in that: The system operation steps of the computer room control system are as follows: S1. Before feeding, the large limestone as raw material is first crushed by a crusher, and the coal as fuel and reducing agent is wetted by a water spraying device. The crushed stone and wetted coal are respectively transported to the stone weighing hopper and the coal weighing hopper through the stone feeding conveyor belt and the coal feeding conveyor belt. When the stone weighing hopper and the coal weighing hopper reach the weight threshold, the machine room control system controls the corresponding stone feeding conveyor belt and the coal feeding conveyor belt to stop feeding; S2. When the machine room control system detects that a kiln is in a material shortage state through the material level meter of a kiln, the machine room control system controls the stone material weighing hopper and the coal material weighing hopper to discharge materials through the mixing conveyor belt and the coal material discharging conveyor belt respectively; S3. When the mixing conveyor belt is conveying the stone, the coal is spread on the upper layer of the stone through the coal discharging conveyor belt above the mixing conveyor belt, and then conveyed to the elevator; S4. When the mixing conveyor belt transports the materials to the elevator, the materials naturally fall into the hopper of the elevator, and the materials are stacked and mixed again; S5. After the weight of the stone material weighing hopper and the coal material weighing hopper returns to zero and all the materials are sent to the hopper of the elevator, the machine room control system controls the mixing conveyor belt and the coal material discharging conveyor belt to stop discharging materials, and restarts the stone material feeding conveyor belt and the coal material feeding conveyor belt to feed materials, while the elevator works to lift the materials; S6. After the hoist lifts the material, it naturally falls onto the kiln top conveyor belt, and is transported to the material distribution valve through the kiln top conveyor belt. The first discharge end or the second discharge end is opened according to the position of the kiln in the material shortage state, and then the material is directly dropped onto the first forward and reverse conveyor belt or dropped onto the second transverse conveyor belt through the transverse conveyor belt; S7. After receiving the falling materials, the first forward and reverse conveyor belt or the second transverse conveyor belt starts to rotate forward or reverse to bring the materials to the kiln in the corresponding material shortage state. After the falling of the materials is completed, the elevator automatically resets.

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