Circulating rolling equipment

Abstract

This invention relates to a circulating compaction apparatus for compacting brittle materials, comprising a first compaction cycle and a second compaction cycle. In the first cycle, a first high-pressure roller press crushes and disperses the supplied fresh material. A material feeder returns a first portion of the compacted material to the first high-pressure roller press and guides a second portion to the second compaction cycle. The fresh material supply section of the second compaction cycle is connected to the material feeder of the first compaction cycle. A static V-shaped screen forms the inlet of the second compaction cycle. The coarse material outlet of the V-shaped screen is connected to the second high-pressure roller press, and the fine material outlet is connected to a basket screen. The fine material outlet of the basket screen forms the product outlet. The coarse material outlet of the basket screen is integrated with the coarse material outlet of the V-shaped screen. The coarse material outlets of the V-shaped screen and the basket screen are connected to the compacted material feeding section of the second high-pressure roller press via a conveying device. The compacted material outlet of the second high-pressure roller press is connected to the inlet of the V-shaped screen.

Description

Technical Field

[0001] This invention relates to a circulating compaction apparatus for compacting cement clinker, ore and / or brittle compacted materials. Background Technology

[0002] To obtain a compacted fine aggregate from virgin material present as coarse material, such as cement clinker, limestone, ore, or other brittle materials, it is known to feed the virgin material into a device for compacting the virgin material. To achieve high compaction fineness, it is known that in the process of a circulating compaction equipment, the compacted material is guided in a circular motion until it is separated from the circulation by screening due to sufficient crushing. An important example is the production of cement and / or cement raw meal by crushing cement clinker, metallurgical slag or furnace slag, limestone, and / or gypsum. To crush the virgin material, roller presses are particularly used, which, depending on their mode of operation, are also called "high-pressure roller presses," "bed roller mills," or, in English, "HighPressure Grinding Roller Press (HPGR)." The compacted material from the device for compacting virgin material typically consists of remaining coarse material and finer particle portions. To obtain fine material, the compacted material is separated from the coarse material in a screening device. In cement production, dynamic screens, especially basket screens, are known to be used to separate granular solid materials from different particle sizes. Furthermore, two-stage processes are known, in which a static pre-screen, such as a cascaded screen also called a V-screen, is connected upstream of the dynamic screen. This reduces not only wear on the dynamic screen, but also, in the cascaded screen, the agglomeration of material generated in the roller press and other compaction devices is dispersed.

[0003] If energy efficiency plays a crucial role in the crushing process, then in a circulating compactor, the usual sequence of crushing, then dispersing, then refeeding, and finally screening after the material has been refeeded is no longer appropriate. If the number of cycles is too high, the material is subjected to unnecessarily frequent mechanical loads without a corresponding increase in material fineness. On the other hand, the number of cycles cannot be arbitrarily reduced, for example, by appropriately placing material switches in the circulating compactor, as arbitrary reduction would result in unsatisfactory material fineness. To achieve the desired compaction result with high energy efficiency, the equipment power and size must be matched to the desired compaction result. It is desirable not to design the size of individual equipment components to be too large, as large equipment components are difficult to operate, and smaller equipment components consume more energy. Summary of the Invention

[0004] Therefore, the object of the present invention is to provide a cyclic crushing device that enables the use of smaller components in most cases compared to known devices.

[0005] The task according to the invention is solved by a cyclic compaction device having the features according to Embodiment 1. Other advantageous designs are given in dependent embodiments of Embodiment 1.

[0006] The circulating compaction apparatus according to the invention is characterized by the connection of two separate cycles. Therefore, the circulating compaction apparatus for compacting cement clinker, ore, and / or brittle materials is specified to have a first compaction cycle in which a first high-pressure roller press crushes and disperses the supplied fresh material. A material feeder returns a first portion of the compacted material to the first high-pressure roller press. Furthermore, the circulating compaction apparatus also has a second compaction cycle. The aforementioned material feeder in the first compaction cycle guides a second portion of the compacted material from the first high-pressure roller press to the second compaction cycle and into its fresh material supply section. In the second compaction cycle, a static V-shaped screen constitutes the inlet of the second compaction cycle. The coarse material outlet of the V-shaped screen is connected to the second high-pressure roller press. The fine material outlet of the V-shaped screen is connected to a basket screen. The fine material outlet of the basket screen constitutes the product outlet of the circulating compaction apparatus. The coarse material outlet of the basket screen is integrated with the coarse material outlet of the static V-shaped screen. The coarse material outlets of the static V-shaped screen and the basket screen are connected to the feed section of the second high-pressure roller press via a conveying device. The feed outlet of the second high-pressure roller press is then connected to the inlet of the static V-shaped screen, thus closing the second compaction cycle.

[0007] In a first design of the circulating compaction apparatus according to the invention, the basket screen of the second compaction cycle is positioned approximately at the same height as the second high-pressure roller press of the second compaction cycle. Here, coarse material from the basket screen falls into a V-shaped screen. This embodiment is meaningful if, due to the material properties of the compacted material, little coarse material falls from the V-shaped screen, and the coarse material must be transported to the second high-pressure roller press by means of a conveying device, such as a combination of a conveyor belt and a bucket elevator. If the majority of the material passing through the V-shaped screen is discharged through its fine material outlet, the size of the conveying device related to transport efficiency can be reduced, thereby improving the energy efficiency of the circulating compaction apparatus.

[0008] In another design of the circulating compaction apparatus according to the invention, the basket screen of the second compaction cycle is positioned above the second high-pressure roller press, and the coarse material outlet of the basket screen is connected to the compaction material feed section of the second high-pressure roller press via a gravity conveying unit. In this design, the coarse material falling from the basket screen is transported to the second roller press without passing through the V-shaped screen. This measure also allows for a smaller conveying device. This configuration is suitable for compacted materials requiring higher screening air velocities, such as ores with higher density. The kinetic energy of the screening air can be used to transport the fine material from the fine screen to the higher-positioned basket screen at the outlet of the V-shaped screen.

[0009] In a particular design of the circulating compaction apparatus according to the invention, the ball mill can be positioned between the coarse material outlet of a static V-shaped screen and a second high-pressure roller press. The ball mill produces a particularly fine compacted material.

[0010] To address undesirable vibrations in the second high-pressure roller press during the second compaction cycle, a conveying device, serving as the connection between the fine material outlet of the ball mill and the second high-pressure roller press, guides at least a portion of the discharged fine material to a basket screen. This basket screen filters out the fine material from the ball mill, preventing rhythmic blockage of the second high-pressure roller press due to excessive fine material. Attached Figure Description

[0011] The invention is further illustrated with the aid of the following figures. In the figures:

[0012] Figure 1 shows the circulating compaction device according to the present invention in the first design scheme.

[0013] Figure 2 shows the circulating compaction device according to the present invention in the second design scheme.

[0014] Figure 3 shows the circulating compaction device according to the invention in the third design scheme. Detailed Implementation

[0015] The foregoing description of the solution according to the invention thus includes, in particular, various combinations of features defined by the subsequently numbered embodiments:

[0016] 1. A circulating compaction device for compacting cement clinker, ore, and / or brittle compactable materials, comprising:

[0017] - First rolling cycle (M1), in which the first high-pressure roller press (10) crushes and disperses the supplied new material, wherein the material switch (11)

[0018] - The first portion of the crushed material is fed back to the first high-pressure roller press (10), and

[0019] - The second portion of the crushed material from the first high-pressure roller press (10) is guided to the second crushing cycle (M2).

[0020] - Second compaction cycle (M2), the new material supply section of the second compaction cycle is connected to the material switch (11) of the first compaction cycle (M1), wherein,

[0021] - A static V-shaped screen (20) forms the inlet of the second compaction cycle (M2).

[0022] - The coarse material outlet (21) of the V-shaped screen is connected to the second high-pressure roller press (40), and

[0023] - The fine material outlet (22) of the V-shaped screen is connected to the basket screen (30), wherein,

[0024] - The fine material outlet (32) of the basket screen (30) constitutes the product outlet of the circulating crushing equipment, and

[0025] - The coarse material outlet (31) of the basket screen (30) is integrated with the coarse material outlet (21) of the static V-shaped screen (20), and

[0026] - The coarse material outlets (21, 31) of the static V-shaped screen (20) and the basket screen (30) are connected to the crushed material feed section (41) of the second high-pressure roller press (40) via a conveying device (B2), and

[0027] - The crushed material outlet (42) of the second high-pressure roller press (40) is connected to the inlet of the static V-shaped screen (20).

[0028] 2. The circulating compaction equipment according to Embodiment 1,

[0029] The basket screen (30) of the second rolling cycle (M2) is set at approximately the same height as the second high-pressure roller press (40) of the second rolling cycle (M2).

[0030] 3. The circulating compaction equipment according to Embodiment 1,

[0031] The basket screen (30) of the second rolling cycle (M2) is located above the second high pressure roller press (40), and the coarse material outlet (31) of the basket screen (30) is connected to the rolling material feed section (41) of the second high pressure roller press (40) through a gravity conveying section.

[0032] 4. The circulating compaction equipment according to any one of embodiments 1 to 3,

[0033] The ball mill (50) is connected between the coarse material outlet (21) of the static V-shaped screen (20) and the second high-pressure roller press (40).

[0034] 5. The circulating compaction equipment according to embodiment 4,

[0035] The conveying device (B2) serves as the connection between the fine material outlet (52) of the ball mill (50) and the second high-pressure roller press (40), guiding at least a portion of the discharged fine material to the basket screen (30).

[0036] 6. The circulating compaction equipment according to embodiments 4 and 5,

[0037] The conveying device (B2) is a bucket elevator.

[0038] Figure 1 illustrates a circulating compaction apparatus according to the invention in a first design embodiment. This circulating compaction apparatus is suitable for compacting cement clinker, ore, and / or other brittle compactable materials such as metallurgical slag or furnace slag, limestone, and / or gypsum. In the first compaction cycle M1 shown on the left side of Figure 1, a first high-pressure roller press 10 exists as a central crushing unit, which crushes and disperses the fresh material supplied via conveyor F1. A material switch 11 is located below the first high-pressure roller press 10. This material switch 11 feeds a first portion of the compacted material back to the first high-pressure roller press 10 via the conveyors F2, B1, and F1, thereby closing the first compaction cycle. Conversely, the same material switch 11 supplies a second portion of the compacted material from the first high-pressure roller press 10 to the second compaction cycle M2 shown on the right side of the figure, thus connecting the first compaction cycle and the second compaction cycle M2 via the conveyor F3. A static V-shaped screen 20, i.e., a cascaded screen, forms the inlet of the second compaction cycle M2. In this design, the coarse material outlet 21 of the V-shaped screen is connected to the second high-pressure roller press 40 of the second rolling cycle M2 via the conveying devices F4, B2, and F5. Conversely, the fine material outlet 22 of the V-shaped screen is connected to the basket screen 30. The fine material outlet 32 ​​of the basket screen 30 constitutes the product outlet of the entire circulating rolling equipment. The coarse material outlet 31 of the basket screen 30 is integrated with the coarse material outlet 21 of the static V-shaped screen 20, and thus, via the aforementioned conveying devices F4, B2, and F5, the coarse material outlets 21 and 31 of the static V-shaped screen 20 and the basket screen 30 are connected to the crushed material feeding section 41 of the second high-pressure roller press 40 via the conveying device B2. The crushed material outlet 42 of the second high-pressure roller press is also connected to the inlet of the static V-shaped screen 2, that is, to the new material feeding section, thereby closing the second rolling cycle. In this embodiment of the circulating compaction equipment shown here, the basket screen 30 of the second compaction cycle M2 is positioned at approximately the same height as the second high-pressure roller press 40 of the second compaction cycle M2. The discharge coarse material from the basket screen 30 falls together with the discharge coarse material from the V-shaped screen onto the conveying device F4, where the combined coarse material is supplied to the second high-pressure roller press 40 via conveying devices B2 and F5.

[0039] Figure 2 illustrates a circulating compaction apparatus according to the invention in a second design. Similar to the circulating compaction apparatus shown in Figure 1, the circulating compaction apparatus in Figure 2 is suitable for compacting cement clinker, ore, and / or other brittle compactable materials such as metallurgical slag or furnace slag, limestone, and / or gypsum. In the first compaction cycle M1 shown on the left side of Figure 2, a first high-pressure roller press 10 serves as a central crushing unit, crushing and dispersing the fresh material supplied via conveyor F1. A material switch 11 is located below the first high-pressure roller press 10. This material switch 11 feeds a first portion of the compacted material back to the first high-pressure roller press 10 via the conveyors F2, B1, and F1, thereby closing the first compaction cycle. Conversely, the same material switch 11 supplies a second portion of the compacted material from the first high-pressure roller press 10 to the second compaction cycle M2 shown on the right side of the figure, thus connecting the first compaction cycle and the second compaction cycle M2 via the conveyor F3. The static V-shaped screen 20, i.e., the cascaded screen, forms the inlet of the second compaction cycle M2. In this design, the coarse material outlet 21 of the V-shaped screen is connected to the second high-pressure roller press 40 of the second compaction cycle M2 via the conveying devices F4, B2, and F5. Conversely, the fine material outlet 22 of the V-shaped screen is connected to the basket screen 30 via a pneumatic conveying line. The fine material outlet 32 ​​of the basket screen 30 forms the product outlet of the entire circulating compaction equipment. In this embodiment, the coarse material outlet 31 of the basket screen 30 is connected to the feed section of the second high-pressure roller press via a gravity conveying unit, so that the coarse material from the coarse material outlet 31 of the basket screen 30 falls into the second high-pressure roller press.

[0040] As shown in Figure 1, the crushed material outlet 42 of the second high-pressure roller press 40 is connected to the inlet of the static V-shaped screen 20, that is, connected to the new material feeding section, so that the second crushing cycle is also closed here.

[0041] Figure 3 illustrates a circulating compaction apparatus according to the invention in a third design. Similar to the circulating compaction apparatus shown in Figure 1, the circulating compaction apparatus in Figure 2 is suitable for compacting cement clinker, ore, and / or other brittle compactable materials such as metallurgical slag or furnace slag, limestone, and / or gypsum. In the first compaction cycle M1 shown on the left side of Figure 2, a first high-pressure roller press 10 serves as a central crushing unit, crushing and dispersing the fresh material supplied via conveyor F1. A material switch 11 is located below the first high-pressure roller press 10. This material switch 11 feeds a first portion of the compacted material back to the first high-pressure roller press 10 via the conveyors F2, B1, and F1, thereby closing the first compaction cycle. Conversely, the same material switch 11 supplies a second portion of the compacted material from the first high-pressure roller press 10 to the second compaction cycle M2 shown on the right side of the figure, thus connecting the first compaction cycle and the second compaction cycle M2 via the conveyor F3. A static V-shaped screen 20, i.e., a cascaded screen, forms the inlet of the second rolling cycle M2. In this design, the coarse material outlet 21 of the V-shaped screen is connected to the ball mill 50 via conveying devices F4, B3, and F6. The fine material outlet 52 of the ball mill 50 is connected to the second high-pressure roller press 40 of the second rolling cycle M2 via conveying devices B2 and F5. Conveying device B2, via conveying device F7, transports a portion of the fine material from the fine material outlet 52 of the ball mill 50 to the basket screen 30. The fine material from the ball mill 50 can optionally be guided to the second high-pressure roller press 40 or to the basket screen 30, or a portion of the fine material can be supplied from the ball mill 50 to the second high-pressure roller press 40, and another portion from the ball mill 50 to the basket screen 30. Conversely, the fine material outlet 22 of the V-shaped screen is connected to the basket screen 30 via a pneumatic conveying line. The fine material outlet 32 ​​of the basket screen 30 constitutes the product outlet of the entire circulating crushing equipment. In this embodiment, the coarse material outlet 31 of the basket screen 30 is connected to the feeding section of the second high-pressure roller press via a gravity conveying unit, so that the coarse material from the coarse material outlet 31 of the basket screen 30 falls into the second high-pressure roller press.

[0042] As shown in Figure 1, the crushed material outlet 42 of the second high-pressure roller press 40 is connected to the inlet of the static V-shaped screen 20, that is, connected to the new material feeding section, so that the second crushing cycle is also closed here.

[0043] List of reference numerals

[0044] 10 High-pressure roller press

[0045] 11 Material turnout

[0046] 20 Screening Device

[0047] 21. Coarse material export

[0048] 22 Fine material exports

[0049] 30-bar basket screen

[0050] 31. Coarse material export

[0051] 32 Fine material exports

[0052] 40 High-pressure roller press

[0053] 41 Compactor Feeding Section

[0054] 42 Compactor Feeding Section

[0055] 50 ball mill

[0056] 52 Fine material exports

[0057] B1 Conveying Device

[0058] B2 Conveying Device

[0059] B3 Conveying Device

[0060] F1 Conveying Device

[0061] F2 Conveying Device

[0062] F3 Conveying Device

[0063] F4 Conveying Device

[0064] F5 Conveying Device

[0065] F6 Conveying Device

[0066] M1 rolling cycle

[0067] M2 rolling cycle

Claims

1. A circular roller mill plant for rolling brittle rolling stock, which has - a first rolling cycle (M1) in which the first high-pressure roller press (10) fragments and spreads the new material fed, wherein, a material turn-off (11) - a first part of the rolling stock is fed back to the first high-pressure roller press (10), and - a second part of the rolling stock of the first high-pressure roller press (10) is directed to a second rolling cycle (M2), - a second rolling cycle (M2), the new material feed of which is connected to the material turn-off (11) of the first rolling cycle (M1), wherein - a static V-shaped sifter (20) constitutes the inlet of the second rolling cycle (M2), - the coarse material outlet (21) of the V-shaped sifter is connected to a second high-pressure roller press (40), and - the fine material outlet (22) of the V-shaped sifter is connected to a rod basket sifter (30), wherein - the fine material outlet (32) of the rod basket sifter (30) constitutes the product outlet of the circular roller mill plant, and - the coarse material outlet (31) of the rod basket sifter (30) is integrated with the coarse material outlet (21) of the static V-shaped sifter (20), and - the coarse material outlets (21, 31) of the static V-shaped sifter (20) and the rod basket sifter (30) are connected to the rolling stock feed (41) of the second high-pressure roller press (40) by means of a conveying device (B2), and - the rolling stock outlet (42) of the second high-pressure roller press (40) is connected to the inlet of the static V-shaped sifter (20).

2. The circular roller mill plant according to claim 1, characterized in that the brittle rolling stock comprises cement clinker and ore.

3. The circular roller mill plant according to claim 1, characterized in that the rod basket sifter (30) of the second rolling cycle (M2) is arranged substantially at the same height as the second high-pressure roller press (40) of the second rolling cycle (M2).

4. The circular roller mill plant according to claim 1, characterized in that the rod basket sifter (30) of the second rolling cycle (M2) is arranged above the second high-pressure roller press (40), and the coarse material outlet (31) of the rod basket sifter (30) is connected to the rolling stock feed (41) of the second high-pressure roller press (40) by means of a gravity conveying section.

5. The circular roller mill plant according to any one of claims 1 to 4, characterized in that a ball mill (50) is connected between the coarse material outlet (21) of the static V-shaped sifter (20) and the second high-pressure roller press (40).

6. The circular roller mill plant according to claim 5, characterized in that a conveying device (B2) as a connection of the fine material outlet (52) of the ball mill (50) to the second high-pressure roller press (40) directs at least a part of the discharged fine material to the rod basket sifter (30).

7. The circular roller mill plant according to claim 5, characterized in that the conveying device (B2) is a bucket elevator.

8. The circular roller mill plant according to claim 6, characterized in that the conveying device (B2) is a bucket elevator.

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