Heat balance control device of slag grinding system

Abstract

The utility model discloses a heat balance control device of a slag grinding system, which comprises a vertical roller mill and a slag conveying belt arranged at a feed port of the vertical roller mill, a pre-drying mechanism is arranged on the slag conveying belt, and the bottom of the vertical roller mill is connected with a heat balance control mechanism. The pre-drying mechanism comprises a first online moisture detector, a drying shell, a microwave generator, a driving motor, a plurality of reciprocating lead screws, a plurality of reciprocating nuts, a plurality of connecting rods and a plurality of shifting claws. The slag pre-drying device has the advantages that when the humidity of slag is large, the microwave generator works to conduct microwave pre-drying treatment on the slag, meanwhile, the multiple staggered stirring claws move in a reciprocating mode to stir the slag, so that the slag is pre-dried more evenly, the heat balance control mechanism detects the humidity of the pre-dried slag on line through the second moisture on-line detector, and the moisture on-line detector is used for detecting the moisture of the pre-dried slag on line. And the purpose of heat balance control is achieved by adjusting the cold air pipeline and the hot air pipeline, so that the ground slag powder is dried more thoroughly.

Description

Technical Field

[0001] The utility model relates to the technical field of slag grinding systems, in particular to a thermal balance control device for a slag grinding system. Background Art

[0002] Slag is a kind of waste residue discharged from a blast furnace during pig iron smelting. It is an easily fusible mixture and can be processed by various processes into valuable materials with various uses. Due to the changes in the varieties and components of ironmaking raw materials and the influence of operating process factors, the composition and properties of slag are also different. According to the varieties of pig iron smelted, slag can be divided into foundry pig iron slag, steelmaking pig iron slag and special pig iron slag.

[0003] During the slag treatment process, a large amount of moisture remains. It needs to be ground into fine particles through a grinding system and dried to remove the moisture to form an industrial raw material. In the existing patent with the application number CN 201820827660.0, a thermal balance control device for a slag grinding system is disclosed. By adding an online moisture detector, it provides a basis for the dynamic regulation of the thermal balance of the slag grinding system, reducing the change in grinding temperature and the fluctuation range of the finished product moisture. However, when the slag humidity is relatively high and due to the short grinding time of the slag in the vertical roller mill, the hot air cannot completely dry the slag, thus affecting the drying effect of the slag powder.

[0004] It should be noted that the above content belongs to the technical cognition scope of the inventor and does not necessarily constitute the prior art. Content of the Utility Model

[0005] Aiming at the above defects, the utility model provides a thermal balance control device for a slag grinding system to solve the problem of thermal balance control of the slag grinding system.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A thermal balance control device for a slag grinding system includes a vertical roller mill and a slag conveyor belt installed at the feeding port of the vertical roller mill. A pre-drying mechanism is provided on the slag conveyor belt, and a thermal balance control mechanism is connected to the bottom of the vertical roller mill;

[0008] The pre-drying mechanism includes a moisture on-line detector I, a drying housing, a microwave generator, a driving motor, a plurality of reciprocating lead screws, a plurality of reciprocating nuts, a plurality of connecting rods, and a plurality of material shifting claws. The moisture on-line detector I is installed on the left side of the slag conveying belt. The drying housing is installed on the slag conveying belt. The microwave generator is installed on the inner top of the drying housing. The driving motor is installed on the left front end of the drying housing. A plurality of reciprocating lead screws are movably inserted into the drying housing, and the front end of the leftmost reciprocating lead screw is connected to the rotating end of the driving motor. A plurality of reciprocating nuts are movably sleeved on the plurality of reciprocating lead screws. A plurality of connecting rods are installed at the bottoms of the plurality of reciprocating nuts. A plurality of material shifting claws are installed at the bottoms of the plurality of connecting rods.

[0009] Furthermore, the thermal balance control mechanism includes a moisture on-line detector II, a cold air duct, a hot air duct, a hot blast stove, a combustion-supporting fan, and a fuel electric valve. The moisture on-line detector II is installed on the right side of the slag conveying belt. The cold air duct is connected to the vertical roller mill through a circulating air duct. The hot air duct is connected to the vertical roller mill through a circulating air duct. The hot blast stove is connected to the rear end of the hot air duct. The combustion-supporting fan is connected to the hot blast stove. The fuel electric valve is installed on the fuel pipeline.

[0010] Furthermore, a cold air electric valve and a hot air electric valve are respectively installed on the cold air duct and the hot air duct.

[0011] Furthermore, a plurality of fixed round rods are installed in the drying housing. A plurality of sliding shaft sleeves are movably sleeved on the plurality of fixed round rods. A connecting rod is connected between a corresponding set of reciprocating nuts and the sliding shaft sleeve.

[0012] Furthermore, a transmission chain is connected between adjacent sets of reciprocating lead screws.

[0013] Furthermore, a feed inlet and a discharge outlet are respectively opened at both ends of the drying housing, and rubber soft curtains are respectively installed at the feed inlet and the discharge outlet.

[0014] The present utility model provides a thermal balance control device for a slag grinding system, which has the following beneficial effects. By providing a pre-drying mechanism on the slag conveying belt, the moisture on-line detector I is used to on-line detect the moisture of the slag raw material. When the slag has a high humidity, the microwave generator in the drying housing works to perform microwave pre-drying treatment on the slag. At the same time, the driving motor drives a plurality of staggered material shifting claws to reciprocate, stirring the slag on the slag conveying belt, so that the pre-drying of the slag is more uniform.

[0015] The thermal balance control mechanism uses the moisture on-line detector II to on-line detect the humidity of the slag after pre-drying, and adjusts the cold air duct and the hot air duct to achieve the purpose of thermal balance control, so that the dried slag powder after grinding is more thoroughly dried. Description of the Drawings

[0016] Figure 1 Schematic diagram of a heat balance control device for a slag grinding system according to the present utility model.

[0017] Figure 2 Bottom view of the drying housing according to the present utility model.

[0018] Figure 3 Schematic diagram of the material distributing claw according to the present utility model.

[0019] Figure 4 Schematic diagram of the rubber soft curtain according to the present utility model.

[0020] In the figure: 1, vertical roller mill; 2, slag conveying belt; 3, online moisture detector I; 4, drying housing; 5, microwave generator; 6, drive motor; 7, reciprocating lead screw; 8, reciprocating nut; 9, connecting rod; 10, material distributing claw; 11, online moisture detector II; 12, cold air duct; 13, hot air duct; 14, hot blast stove; 15, combustion supporting fan; 16, fuel electric valve; 17, cold air electric valve; 18, hot air electric valve; 19, fixed round rod; 20, sliding shaft sleeve; 21, connecting rod; 22, drive chain; 23, feed inlet; 24, discharge outlet; 25, rubber soft curtain. Specific embodiments

[0021] The present utility model will be specifically described below with reference to the accompanying drawings, as Figures 1-4As shown in the figure: A heat balance control device for a slag grinding system, including a vertical roller mill 1 and a slag conveying belt 2 installed at the feed inlet of the vertical roller mill 1. A pre-drying mechanism is provided on the slag conveying belt 2, and a heat balance control mechanism is connected to the bottom of the vertical roller mill 1; the pre-drying mechanism includes a moisture on-line detector 3, a drying housing 4, a microwave generator 5, a driving motor 6, a plurality of reciprocating lead screws 7, a plurality of reciprocating nuts 8, a plurality of connecting rods 9 and a plurality of feeding claws 10. The moisture on-line detector 3 is installed on the left side of the slag conveying belt 2, the drying housing 4 is installed on the slag conveying belt 2, the microwave generator 5 is installed on the inner top of the drying housing 4, the driving motor 6 is installed on the left front end of the drying housing 2. A plurality of reciprocating lead screws 7 are movably inserted into the drying housing 2, and the front end of the leftmost reciprocating lead screw 7 is connected to the rotating end of the driving motor 6. A plurality of reciprocating nuts 8 are movably sleeved on a plurality of reciprocating lead screws 7. A plurality of connecting rods 9 are installed at the bottoms of a plurality of reciprocating nuts 8, and a plurality of feeding claws 10 are installed at the bottoms of a plurality of connecting rods 9; the heat balance control mechanism includes a moisture on-line detector 2 11, a cold air duct 12, a hot air duct 13, a hot blast stove 14, a combustion-supporting fan 15 and a fuel electric valve 16. The moisture on-line detector 2 11 is installed on the right side of the slag conveying belt 2. The cold air duct 12 is connected to the vertical roller mill 1 through a circulating air duct. The hot air duct 13 is connected to the vertical roller mill 1 through a circulating air duct. The hot blast stove 14 is connected to the rear end of the hot air duct 13. The combustion-supporting fan 15 is connected to the hot blast stove 14. The fuel electric valve 16 is installed on the fuel pipeline; a cold air electric valve 17 and a hot air electric valve 18 are respectively installed on the cold air duct 12 and the hot air duct 13; a plurality of fixed round rods 19 are installed in the drying housing 4, and a plurality of sliding shaft sleeves 20 are movably sleeved on a plurality of fixed round rods 19. A connecting rod 21 is connected between a corresponding set of reciprocating nuts 8 and the sliding shaft sleeve 20; adjacent sets of reciprocating lead screws 7 are driven by a transmission chain 22; feeding ports 23 and discharging ports 24 are respectively opened at both ends of the drying housing 4, and rubber soft curtains 25 are respectively installed at the feeding ports 23 and the discharging ports 24.

[0022] Working principle of this embodiment: The electrical equipment used in this device is controlled by an external controller. The moisture on-line detector 3 can be used to on-line detect the moisture of the slag raw material on the slag conveying belt 2;

[0023] During pre-drying: The drying housing 4 is installed on the slag conveyor belt 2. The microwave generator 5 is installed at the top inside the drying housing 4. The drive motor 6 is installed on the left side at the front end of the drying housing 2. A number of reciprocating lead screws 7 are movably inserted into the drying housing 2 through fastening bearings. The front end of one reciprocating lead screw 7 on the left is connected to the rotating end of the drive motor 6. A number of reciprocating nuts 8 are movably sleeved on a number of reciprocating lead screws 7. A number of connecting rods 9 are installed at the bottoms of a number of reciprocating nuts 8. A number of material stirring claws 10 are installed at the bottoms of a number of connecting rods 9. A number of fixed round rods 19 are installed inside the drying housing 4. A number of sliding bushings 20 are movably sleeved on a number of fixed round rods 19. A connecting rod 21 is connected between a corresponding set of reciprocating nut 8 and the sliding bushing 20. Adjacent sets of reciprocating lead screws 7 are connected by a transmission chain 22. Feed inlets 23 and discharge outlets 24 are respectively formed at both ends of the drying housing 4. Rubber soft curtains 25 are respectively installed at the feed inlets 23 and the discharge outlets 24. As Figure 2 — Figure 4 shown, a number of material stirring claws 10 are arranged staggeredly. When the moisture on-line detector 1 detects that the humidity of the slag is relatively high, the detection signal is connected to the controller, and the microwave generator 5 and the drive motor 6 are controlled by the controller to start working. The microwave generator 5 inside the drying housing 4 first performs microwave pre-drying treatment on the slag. At the same time, the drive motor 6 drives a number of staggered material stirring claws 10 to reciprocate through a number of reciprocating lead screws 7, stirring the slag on the slag conveyor belt 2, so as to make the pre-drying of the slag more uniform. Using the pre-drying mechanism to pre-dry the slag with relatively high humidity can make the dried slag powder after grinding more thorough. The rubber soft curtains 25 at the feed inlets 23 and the discharge outlets 24 can reduce the heat loss inside the drying housing 4;

[0024] During heat balance control: The moisture on-line detector 2 11 is installed on the right side of the slag conveyor belt 2. The cold air duct 12 is connected to the vertical roller mill 1 through a circulation air duct. The hot air duct 13 is connected to the vertical roller mill 1 through a circulation air duct. The hot blast stove 14 is connected to the rear end of the hot air duct 13. The combustion-supporting blower 15 is connected to the hot blast stove 14. The fuel electric valve 16 is installed on the fuel pipeline. The fuel pipeline is communicated with the hot blast stove 14. Cold air electric valves 17 and hot air electric valves 18 are respectively installed on the cold air duct 12 and the hot air duct 13. As Figure 1 shown, the moisture on-line detector 2 11 is used to on-line detect the humidity of the slag after pre-drying. The detection signal is connected to the controller, and the fuel electric valve 16, the cold air electric valve 17 and the hot air electric valve 18 are controlled by the controller to achieve the purpose of heat balance control. This is the prior art, so as to make the dried slag powder after grinding more thorough.

[0025] The above technical solution only reflects the preferred technical solution of the technical solution of the present utility model. Some changes that those skilled in the art of this technology may make to some parts thereof all reflect the principle of the present utility model and fall within the protection scope of the present utility model.

Claims

1. A heat balance control device for a slag grinding system, comprising a vertical roller mill (1) and a slag conveyor belt (2) installed at a feed inlet of the vertical roller mill (1), characterized in that: The slag conveyor belt (2) is provided with a pre-drying mechanism, and the bottom of the vertical roller mill (1) is connected with a heat balance control mechanism; The pre-drying mechanism comprises an online moisture detector (3), a drying shell (4), a microwave generator (5), a driving motor (6), a plurality of reciprocating screw rods (7), a plurality of reciprocating screw nuts (8), a plurality of connecting rods (9) and a plurality of material-moving claws (10), wherein the online moisture detector (3) is mounted on the left side of the slag conveying belt (2), the drying shell (4) is mounted on the slag conveying belt (2), the microwave generator (5) is mounted on the top of the drying shell (4), the driving motor (6) is mounted on the left side of the front end of the drying shell (4), the plurality of reciprocating screw rods (7) are movably inserted in the drying shell (4), and the front end of a reciprocating screw rod (7) on the left side is connected to the rotating end of the driving motor (6), the plurality of reciprocating screw nuts (8) are movably sleeved on the plurality of reciprocating screw rods (7), the plurality of connecting rods (9) are mounted on the bottom of the plurality of reciprocating screw nuts (8), and the plurality of material-moving claws (10) are mounted on the bottom of the plurality of connecting rods (9).

2. A thermal balance control device for a slag grinding system according to claim 1, characterized in that: The heat balance control mechanism comprises an online moisture detector 2 (11), a cold air duct (12), a hot air duct (13), a hot air furnace (14), a combustion-supporting fan (15) and a fuel electric valve (16), wherein the online moisture detector 2 (11) is installed on the right side of the slag conveyor belt (2), the cold air duct (12) is connected to the vertical roller mill (1) through a circulating air duct, the hot air duct (13) is connected to the vertical roller mill (1) through a circulating air duct, the hot air furnace (14) is connected to the rear end of the hot air duct (13), the combustion-supporting fan (15) is connected to the hot air furnace (14), and the fuel electric valve (16) is installed on the fuel duct.

3. A thermal balance control device for a slag grinding system according to claim 2, characterized in that: The cold air duct (12) and the hot air duct (13) are respectively installed with a cold air electric valve (17) and a hot air electric valve (18).

4. A thermal balance control device for a slag grinding system according to claim 1, characterized in that: A plurality of fixed round rods (19) are installed in the drying shell (4), a plurality of sliding sleeves (20) are movably mounted on the plurality of fixed round rods (19), and a corresponding set of reciprocating screw nuts (8) and the sliding sleeves (20) are connected via connecting rods (21).

5. The heat balance control device for a slag grinding system according to claim 1, characterized in that: Adjacent groups of reciprocating screw rods (7) are connected in transmission via a transmission chain (22).

6. The heat balance control device for a slag grinding system according to claim 1, characterized in that: The drying shell (4) has a feed inlet (23) and a discharge outlet (24) at both ends, and a rubber soft curtain (25) is installed at the feed inlet (23) and the discharge outlet (24).

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