WO2021017515A1

WO2021017515A1 - Cement clinker grinding implementation equipment, stirring device thereof and cement grinding system

Info

Publication number: WO2021017515A1
Application number: PCT/CN2020/082715
Authority: WO
Inventors: 何亚民; 丁亚卓; 徐智平
Original assignee: 成都利君实业股份有限公司; 成都利君科技有限责任公司
Priority date: 2019-07-29
Filing date: 2020-04-01
Publication date: 2021-02-04

Abstract

A cement clinker grinding implementation equipment, a stirring device thereof, and a cement grinding system, the cement clinker grinding implementation equipment (100) comprises a housing (110), a screening device (160) and a stirring device; the stirring device comprises a stirring shaft (120) capable of being driven to rotate by a driving system (150), and at least one stirring unit (130) provided in the axial direction of the stirring shaft (120), both sides of the stirring unit (130) in the axial direction of the stirring shaft (120) form a sub-grinding area S; at least one reinforcing stirring member (140) is connected to the stirring unit (130), and the reinforcing stirring member (140) extends within the sub-grinding area S; and the reinforcing stirring member (140) cooperates with the stirring unit (130) to allow at least part of the grinding medium and material in the sub-grinding area S to perform a grinding movement along the circumference of the stirring shaft (120), thereby enabling the cement clinker grinding implementation equipment to perform dry powder grinding under the condition of high filling rate and high rotational speed, effectively eliminating the dead material area, and reducing the energy consumption.

Description

Cement clinker grinding implementation equipment, its mixing device and cement grinding system

Technical field

The invention relates to the technical field of grinding devices, in particular to a cement clinker grinding implementation equipment, a stirring device and a cement grinding system.

Background technique

The high-energy ball mill is the core equipment of the crushing and grinding process. The drum-type ball mill mainly used in industry has a large processing capacity, but it has a critical speed and the collision energy is small during ball milling. The cylinder of the agitator ball mill is partially fixed, and the agitator rotates with the spindle at high speed. Under the action of friction and centrifugal force, the grinding medium in the cylinder is driven to move together, causing intense and frequent collisions between the medium and between the medium and the wall. Shearing and friction will cause the material to break and dissociate. In principle, there is no speed limit for agitated ball mills, and the collision energy can reach a large value during ball milling, and achieve high energy density input.

Agitated ball mills can be divided into vertical and horizontal according to the installation of the agitator shaft, and can be divided into dry and wet according to the grinding process. Compared with the horizontal type, the vertical stirring shaft adopts suspension installation. During the ball milling process, the stirring shaft is subjected to dynamic impact, which causes the stirring shaft to swing too much, working for a long time, and prone to jamming and bearing seal failure. Compared with the wet method, the dry method has a complicated production process, which requires dehydration and drying treatment, and the finished product production cycle is long.

According to the Chinese invention patent CN103567028B, an agitated ball mill for grinding dry or non-dried materials is disclosed, which is equipped with a grinding container, a stirring shaft extends in or near the center of the grinding container, and a plurality of grinding elements are arranged on the stirring shaft . The stirring type ball mill is provided with a fluid channel in the center of the stirring shaft, and the fluid is introduced into the space near the last grinding element connected to the upstream of the outlet area through the fluid channel, and the fluid moves in the grinding container at a speed of 0-50m/s. The agitated ball mill is mainly suitable for wet grinding. The material flow passes through the separation device radially to separate the material and the grinding medium, and the material is easy to accumulate at the separation device. The fluid is sprayed into the grinding container through the discharge hole of the agitating shaft located upstream of the outlet area, and the material flows through the upstream of the outlet area, between the separation device and the outlet, optimizing the flow of the conveying medium in the grinding container, and alleviating the problem of material blocking, but it is expensive Can be higher.

According to the Chinese invention patent CN104053506A, a method for operating agitated ball mill and agitated ball mill for performing the method are disclosed, wherein the separation system includes a static screen with a free aperture surface configured to allow exit through the separation system and the product outlet The gas passing speed of the stirring mill is about 10 m/s to 30 m/s, preferably 15 m/s to 25 m/s. The agitated ball mill is also mainly suitable for wet grinding, relying on the rotation of the agitating shaft to drive the viscous material flow for grinding motion, so as to grind the material at high filling rate and high speed. The discharge port of the agitated ball mill is set at the center of the end of the cylinder, and the material is discharged in the form of air swept mill, which is also not conducive to the normal discharge of materials and high energy consumption.

According to Chinese invention patent CN202447150U, a horizontal dry-type internal grading stirring mill is disclosed, which includes a cylinder, a stirring shaft, a drive system, a feed air locker, an air cooling system, a grading system, and a base. The stirring shaft Installed in the cylinder body, the end is connected to the drive system, the cylinder body is installed on the machine base, the feed air lock is installed on the upper part of the cylinder body and connected to the feed inlet, the air cooling device is installed in the cylinder body, and the grading system is installed in the cylinder body On the upper discharge port. The feed inlet of the horizontal dry internal grading mixing mill is set on the upper part of the cylinder, which is not conducive to normal feeding at high speed and high filling rate; its mixing shaft is composed of a main shaft and a mixing disc or blade, which is prone to dead material area , Especially under the condition that the filling rate is higher than 32%, the grinding media and materials are accumulated in the cylinder, and the mixing disc or blades are idling, and the grinding media and materials cannot perform effective grinding movement.

In wet grinding, the grinding media and materials form a certain viscous material flow, and the viscous material flow is easily carried by the agitator to make grinding movement in the mixing chamber; while in dry grinding , The material flow formed by the dry grinding media and materials, especially the material flow located in the lower part of the mixing chamber, is easy to stagnate and produce a dead material zone. Under the condition of low speed and low filling rate, the dead material area produced by this horizontal dry grinding is relatively small, but under the condition of high filling rate and high speed, the agitator will have serious idling problems, and the grinding work cannot be carried out normally. .

Summary of the invention

The purpose of the present invention is to solve the problem that the existing horizontal ball mill is not suitable for dry grinding of cement clinker, especially the problem that the existing horizontal ball mill has a large number of dead material areas under the condition of high filling and high speed. This kind of cement clinker grinding implementation equipment and its mixing device and cement grinding system can perform dry grinding under the conditions of high filling rate and high speed, effectively eliminating the dead material area, and grinding the same level of material. Significantly reduce energy consumption and increase the capacity of cement grinding systems.

The technical scheme adopted by the present invention is as follows:

According to the present invention, a mixing device for cement clinker grinding equipment includes a mixing shaft that can be driven to rotate by a driving system, and at least one mixing unit arranged on the axial direction of the mixing shaft. The two sides of the shaft axis form a sub-grinding zone, at least one reinforced agitating member is connected to the stirring unit, and the reinforced agitating member extends in the sub-grinding zone, so that at least part of the grinding media and materials in the sub-grinding zone are along the circumferential direction of the stirring shaft Make a grinding exercise.

Further, the reinforced stirring member is arranged at intervals in the circumferential direction of the stirring unit; at least two adjacent stirring units are connected to each other by the reinforced stirring member and form a cage type stirring group.

Further, the stirring unit protrudes along the radial direction of the stirring shaft; at least two of the stirring units are arranged axially spaced apart on the stirring shaft.

Further, the stirring unit is provided with at least one flow hole, and the flow hole is configured to allow at least part of the grinding media and materials to flow between the sub-grinding zones in a direction parallel to the axial direction of the stirring shaft.

Further, at least one of the reinforced stirring member is a rod-shaped structure; the reinforced stirring member is at least one of the first stirring member and the second stirring member, and the extension line of the first stirring member is parallel to the axis of the stirring shaft, The extension line of the second stirring member is different from the axis of the stirring shaft.

Further, at least one stirring unit is a disc-shaped blade; and/or, at least one stirring unit is a spiral blade.

Further, the stirring unit includes at least two split blades that can be separated or combined, and the at least two split blades are connected as a whole by bolts.

Further, the reinforced stirring member and/or the stirring unit are made of wear-resistant alloy; the surface of the reinforced stirring member and/or the stirring unit has a composite wear-resistant material layer.

According to the cement clinker grinding implementation equipment disclosed in the present invention, it is used for dry grinding of cement clinker, including: a shell, including a wall defining a horizontally extending mixing cavity, and a feed inlet and an outlet communicating with the mixing cavity Material port; a stirring device, including a stirring shaft extending into the stirring cavity and at least one stirring unit arranged on the stirring shaft; a screening device separating the stirring cavity and the discharge port; wherein the agitating unit is axially along the axis A sub-grinding zone is formed on both sides of the sub-grinding zone, and at least one reinforced agitating member is arranged in the sub-grinding zone; And the material makes grinding movement along the circumference of the mixing shaft.

Further, the reinforced stirring member is connected to the stirring unit, and the stirring unit and the casing are relatively rotated; or, the reinforced stirring member is connected to the casing, the casing rotates, and the stirring unit and The shells rotate relatively.

Further, the reinforced stirring member is connected to the stirring unit, and the reinforced stirring member is arranged at intervals in the circumferential direction of the stirring unit; at least two adjacent stirring units are connected to each other through the reinforced stirring member and form a cage stirring group.

Further, a gap is provided between the wall and the stirring unit, and the ratio of the width of the gap to the diameter of the grinding medium is greater than 3; the wall forms an annulus area on the periphery of the stirring unit, and the sub-grinding area drives the annulus area for grinding movement .

Further, the cross section of the stirring chamber is at least one of a circle, an ellipse and a polygon; the inner side of the wall is provided with a wear-resistant liner, and the wear-resistant liner is made of wear-resistant alloy, ceramic, nylon And made of at least one material in polyurethane.

Further, a cooling device is provided outside the housing; the cooling device includes a circulating cooling layer and/or cooling fins.

Further, the feed port is arranged on the end of the shell, and the feed port is matched with the cavity area on the periphery of the stirring shaft for feeding.

Further, the feed port is arranged at a non-central position of the end of the shell, and the feed port is located on the upper part of the shell.

Further, the conveying airflow passed into the mixing chamber is configured to enable the ground material to pass through the screening device and convey to the direction of the discharge port.

Further, the stirring unit is provided with at least one flow hole, and the flow hole is configured to allow at least part of the grinding medium and materials to flow between the sub-grinding zones in a direction parallel to the axial direction of the stirring shaft; The conveying airflow drives the ground material to flow through the mixing chamber in a direction parallel to the axial direction of the mixing shaft and pass through the screening device.

Further, the flow holes pass through in a direction parallel to the axis of the stirring shaft; the flow holes are arranged at intervals in the circumferential direction of the stirring unit.

Further, the speed of the conveying airflow is 5-30 m/s; the conveying airflow is formed by switching between one or two of the cooling airflow and the drying airflow.

Further, the sieving device is separated between the stirring chamber and the discharge port to form a flow chamber for gas-solid separation; the ground material in the flow chamber sinks under the combined force of its own gravity and the conveying air force. The discharge port is separated from the conveying airflow.

Further, the housing is provided with an air inlet and an air outlet; the air outlet is connected through the flow cavity and is located above the outlet; a height difference is provided between the air outlet and the outlet.

Further, the ground material is separated from the grinding medium by a screening device; the screening device at least includes a stationary screen plate installed in the housing, and the screen hole diameter of the screen plate is smaller than the diameter of the grinding medium.

According to an open-flow cement grinding system disclosed in the present invention, it includes an aggregate device, a roller press, a powder separator, a dust collector, and the cement clinker grinding implementation equipment as described above, which are connected in sequence; The coarse material outlet of the powder assembly is connected to the feed inlet of the collecting device, and the fine material outlet of the powder selection assembly is connected to the inlet of the dust collection assembly.

Further, the powder separator assembly includes a powder separator B and a powder separator A connected, the discharge port of the roller press is connected to the feed port of the powder separator B, and the coarse material outlet of the powder separator B is connected to the collecting device The fine material outlet of the classifier B is connected to the inlet of the classifier A, the coarse material outlet of the classifier A is connected to the inlet of the collecting device, and the fine material outlet of the classifier A is connected to the collection Dust components.

Further, the powder separator A is preferably an XR high-efficiency powder separator; the powder separator B is a VX static powder separator.

Further, the cyclone and dust collection device A are connected in sequence to the dust collection assembly, the air inlet of the cyclone is connected to the fine material outlet of the powder separator A, and the air outlet of the cyclone is connected to the air inlet of the dust collection device A. And the discharge port of the dust collector A are connected to the inlet of the cement clinker grinding implementation equipment.

Further, the cement clinker grinding implementation equipment is provided with an air inlet and an air outlet, and the cement clinker grinding implementation equipment is provided with a conveying air flow, and the air outlet of the cement clinker grinding implementation device is provided with a dust collecting device B for air Solid separation.

A semi-final cement grinding system disclosed according to the present invention includes a collecting device, a roller press and a powder separator. The fine material outlet of the powder separator is connected to the dust collecting device A, and the coarse material outlet of the powder separator is connected to aggregate The feed inlet of the device, the intermediate outlet of the powder separator is connected to the inlet of the cement clinker grinding implementation equipment as described above, and the outlet of the cement clinker grinding implementation equipment is connected to the inlet of the powder separator. cycle.

Further, the powder separator includes a powder separator B and a powder separator A which are connected to each other, the feed port of the powder separator B is connected to the discharge port of the roller press, and the coarse material outlet of the powder separator B is connected to the collecting device for feeding口, the fine material outlet of classifier B is connected to the inlet of classifier A, the coarse material outlet of classifier A is connected to the inlet of the collecting device, and the fine material outlet of classifier A is connected to the dust collection assembly. The medium outlet of the powder machine A is connected to the inlet of the cement clinker grinding implementation equipment.

Further, the powder classifier A is an SRV vortex classifier; the powder classifier B is a VX static classifier.

Furthermore, the cement clinker grinding implementation equipment is provided with an air inlet and an air outlet, and the conveying air flow is introduced into the cement clinker grinding implementation equipment, and the air outlet of the cement clinker grinding implementation equipment is connected to the dust collecting device B to collect dust The discharge port of the device B and the discharge port of the cement clinker grinding implementation equipment are both connected to the inlet of the powder separator A.

Further, it includes a collecting device, a roller press, a powder separator B and a cyclone which are connected in sequence, wherein the coarse material outlet of the powder separator B is connected to the inlet of the collecting device, and the fine material outlet of the powder separator B is connected The air inlet of the cyclone and the outlet of the cyclone are connected to the regrind and reselection circulation mechanism; wherein the regrind and reselection closed-circuit circulation mechanism includes the cement clinker grinding implementation equipment and connection according to any one of claims to Powder separator A, cement clinker grinding implementation equipment, the inlet is connected to the cyclone outlet, the cement clinker grinding implementation equipment is connected to the outlet of the separator A, and the coarse material outlet of the separator A is connected Cement clinker grinding is implemented with a feed inlet to form a regrind and reselection cycle, and the fine material outlet of the classifier A is used for gas-solid separation through the dust collector A.

Further, the cement clinker grinding implementation equipment is provided with an air inlet and an air outlet, and the conveying air flow is introduced into the cement clinker grinding implementation equipment, and the air outlet of the cement clinker grinding implementation equipment is connected with a dust collector A, The outlet of dust device A is connected to the inlet of powder classifier A through feeding device A.

Furthermore, the powder classifier A is an SRV vortex classifier; the powder classifier B is preferably a VX static classifier.

A semi-final loop cement grinding system disclosed according to the present invention is characterized in that a collecting device, a roller press and a powder separator, the fine material outlet of the powder separator is connected to the dust collecting module, and the coarse material of the powder separator The outlet is connected to the feed inlet of the collecting device, and the intermediate material outlet of the powder selection assembly is connected to a regrind and reselection recycling mechanism; the regrind and reselection recycling mechanism includes a powder separator A and the cement clinker grinding implementation equipment as described above , The inlet of the cement clinker grinding implementation equipment is connected to the intermediate material outlet of the classifier B, and the coarse material outlet of the classifier A is connected to the inlet of the cement clinker grinding implementation equipment to form a regrinding and reselection cycle. The fine material outlet of the powder machine A passes through the dust collector B for gas-solid separation.

Further, the powder separator assembly includes a powder separator C and a powder separator B. The coarse material outlet of the powder separator C is connected to the inlet of the collecting device, and the fine material outlet of the powder separator C is connected to the inlet of the powder separator B. , The coarse material outlet of the powder classifier B is connected to the feed inlet of the collecting device for recirculation, the medium material outlet of the powder classifier B is re-grinded and then the closed loop mechanism is selected, and the fine material outlet of the powder classifier B is gas-solidified through the dust collection assembly Separate.

Further, the dust collection assembly includes a cyclone and a dust collection device C that are connected in sequence, and the discharge port of the cyclone and the dust collection device C cooperates with the feed device B for discharging.

According to the present invention, a semi-final open-flow cement grinding system includes a collecting device, a roller press and a powder separator which are connected in sequence, wherein the coarse material outlet of the powder separator is connected to the inlet of the collecting device, The middle material outlet of the powder selection component is connected to the inlet of the cement clinker grinding implementation equipment as described above, the fine material outlet of the powder selection component is connected to the dust collection component, and the discharge port and dust collection component of the cement clinker grinding implementation equipment The discharge port cooperates with the feeding device for unloading.

Further, the powder separator includes powder separator B and powder separator A. The feed port of powder separator B is connected to the discharge port of the roller press, and the coarse material outlet of powder separator B is connected to the feed port of the collecting device. The fine material outlet of the powder machine B is connected to the inlet of the powder classifier A, the coarse material outlet of the powder machine A is connected to the inlet of the collecting device, the fine material outlet of the powder machine A is connected to the dust collection assembly, and the powder classifier A The medium material outlet is connected to the inlet of cement clinker grinding implementation equipment.

Further, the dust collection assembly includes a cyclone and a dust collection device B that are connected in sequence, and the discharge port of the cyclone and the discharge port of the dust collection device B cooperate with the feeding device to discharge materials.

Further, the cement clinker grinding implementation equipment is provided with air inlets and outlets, and the cement clinker grinding implementation equipment is provided with a conveying air flow, and the cement clinker grinding implementation equipment is equipped with a dust collecting device A at the outlet for gas-solid separation. .

In summary, due to the adoption of the above technical solution, the beneficial effect of the present invention is that by providing reinforced agitating elements in the sub-grinding areas on both sides of the agitating unit, between adjacent agitating units or between the agitating units and the end walls on both sides Part or all of the grinding media and materials collide and impact with the reinforced agitator, and rise to the upper direction of the stirring chamber, which causes the grinding movement such as the circulation and rotation of the grinding media, and then drives the stirring unit and the inner wall of the stirring chamber The grinding movement of the grinding media eliminates the dead material zone; the intense impact, friction, and shear between the grinding media and between the grinding media and the inner wall of the stirring chamber can cause the materials dispersed between the grinding media to be ground into Fine particles. In addition, the cement clinker grinding implementation equipment of the present invention introduces conveying airflow into the mixing chamber. Unlike the existing dry ball mill, which basically relies on the overflow of materials to promote the flow of materials, the present invention optimizes the material flow in the mixing chamber by conveying airflow. The mixing and flow mode of the wind power participates in the mixing and conveying of the materials, prompting the ground materials to be discharged from the mixing chamber in time, and selecting while grinding to avoid over-grinding. The cement clinker grinding implementation equipment of the present invention has a small starting torque, and can efficiently perform dry grinding of cement clinker under working conditions where the rotation speed is more than 3 times higher than the critical rotation speed and the grinding medium filling rate is more than 70%, so that the application of the above The cement grinding system equipped for cement clinker grinding has greatly increased production capacity and reduced energy consumption.

Description of the drawings

1 is a cross-sectional view of the first embodiment of the cement clinker grinding equipment of the present invention;

Figure 2 is a partial enlarged schematic view of A in Figure 1 of the present invention;

3 is a cross-sectional view of a second embodiment of the cement clinker grinding equipment of the present invention;

4 is a cross-sectional view of a third embodiment of the cement clinker grinding equipment of the present invention;

5 is a cross-sectional view of a fourth embodiment of the cement clinker grinding equipment of the present invention;

Fig. 6 is a schematic diagram of the open-flow cement grinding system of embodiment 3 of the present invention;

Fig. 7 is a schematic diagram of the semi-final cement grinding system of embodiment 4 of the present invention;

Fig. 8 is a schematic diagram of a combined circulation cement grinding system of embodiment 5 of the present invention;

Figure 9 is a schematic diagram of a semi-final loop cement grinding system according to Example 6 of the present invention;

Figure 10 is a schematic diagram of a semi-final open flow cement grinding system according to Example 7 of the present invention;

Mark in the picture:

100,210,311,411,511,610-Cement clinker grinding implementation equipment; S-sub-grinding area;

110-shell; R-circle area;

120-mixing shaft; 200-open flow cement grinding system;

130-Mixing unit; 300-Semi-final cement grinding system;

140-Reinforced mixing unit; 400-United circle flow cement grinding system;

150-Drive system; 500-Semi-final flow cement grinding system;

160-screening device; 600-semi-final flow cement grinding system;

170-Cooling device; 203,406,504,604-Swirl wind tube;

111-Mixing chamber; 207,309,409,508,608-collecting device;

112-Inlet port; 208,310,410,509,609-roller press;

113-discharge port; 204,306,404,514,605-powder separator A;

114-Inlet; 205,308,407,505,607-powder separator B;

115-outlet; 507-powder separator C;

116-Overflow cavity; 206,301,401,513,612-feeding device A;

131-disc-shaped blade; 209,302,408,510,613-feeding device B;

132-Spiral blades; 212,303,506,606-feeding device C;

M,N-end part; 307-feeding device D;

F-Conveying air flow; 313-Feeding device E;

201,305,403,512,611-Dust collector A; 202,304,516,601-fan A;

211,312,412,515,602-dust collector B; 405,501,603-fan B;

502-Dust collection device C; 503-Fan C.

Detailed ways

All the features disclosed in this specification, or all disclosed methods or steps in the process, except for mutually exclusive features and/or steps, can be combined in any manner.

Any feature disclosed in this specification (including any additional claims, abstract), unless specifically stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is just one example of a series of equivalent or similar features.

Example 1

1 illustrates the mixing device of the cement clinker grinding equipment disclosed in this embodiment, which includes a mixing shaft 120, a mixing unit 130, and a reinforced mixing member 140. The mixing unit 130 is installed on the mixing shaft 120, and the mixing unit 130 and The stirring shaft 120 is preferably connected by a key or a bolt, the reinforced stirring member 140 is installed on the stirring unit 130, and the number of the stirring unit 130 and the reinforced stirring member 140 is at least one. When the number of the stirring units 130 is greater than one, the stirring units 130 are sequentially arranged along the axial direction of the stirring shaft 120.

When the stirring shaft 120 rotates, the stirring unit 130 rotates together with the stirring shaft 120. The stirring unit 130 protrudes radially from the stirring shaft 120 along the stirring shaft 120 and is the main functional element of the grinding. In the first specific implementation of the stirring unit 130, as shown in FIGS. 1 and 3, at least one stirring unit 130 is a disc-shaped blade 131, and at least one stirring unit 130 is a spiral blade 132, that is, inside the stirring chamber 111 There are at least two types of stirring units 130; a plurality of stirring units 130 are arranged at intervals along the axis of the stirring shaft 120, and the layout of different stirring units 130 is adjusted according to the requirements of the grinding process. In the second specific implementation of the stirring unit 130, as shown in FIG. 4, the multiple stirring units 130 provided on the stirring shaft 120 are all disk-shaped blades 131, and the disk-shaped blades 131 are arranged at intervals along the axial direction of the stirring shaft 120. In the third embodiment of the stirring unit 130, the stirring unit 130 is provided on the stirring shaft 120, wherein the multiple stirring units 130 are spiral blades 132, and the multiple spiral blades 132 are connected end to end in sequence. The shape and layout of the stirring unit 130 can be adjusted according to the requirements of the grinding process, and are not limited to the specific embodiments exemplified above.

The two sides of the stirring unit 130 along the axial direction of the stirring shaft 120 form sub-grinding zones S. Specifically, when one stirring unit 130 is axially arranged on the stirring shaft 120, the sub-grinding zone S is formed between the stirring unit 130 and the end wall of the adjacent stirring cavity 111; When the stirring unit 130 is stirred, a sub-grinding zone S is formed between the adjacent stirring units 130 and between the stirring unit 130 and the end wall of the adjacent stirring cavity 111. The applicant found in actual operation that the sub-grinding zone S in the lower middle of the mixing chamber 111 of the cement clinker grinding implementation equipment 100 easily becomes a dead material zone, which causes the mixing unit 130 to run idly and ineffectively grind. In this embodiment, the reinforced stirring member 140 connected to the stirring unit 130 extends in the sub-grinding zone S. When the stirring unit 130 rotates together with the stirring shaft 120, the reinforced stirring member 140 and the stirring unit 130 work together to make the corresponding At least part of the grinding media and materials in the grinding zone S impacts and collides with the reinforced stirring member 140, and this part of the grinding media and materials are driven by the reinforced stirring member 140 and the stirring unit 130 to the upper part of the stirring chamber 111 and perform grinding movement. .

As the main functional element of the grinding movement, the stirring unit 130 generally has a short service life and needs to be replaced in time. The stirring unit 130 in this embodiment is a split structure. The stirring unit 130 is formed by two or more split blades that can be split or combined through bolt connection or other connection methods, which reduces the difficulty of replacing the stirring unit 130 And cost. In order to prolong the service life of the stirring unit 130, the stirring unit 130 may be made of a wear-resistant alloy or a material with a higher strength than the wear-resistant alloy. Optionally, a composite wear-resistant material layer may be provided on the surface of the stirring unit 130.

Optionally, the reinforced stirring members 140 are arranged at intervals in the circumferential direction of the stirring unit 130, that is, the multiple reinforced stirring members 140 arranged on the same stirring unit 130 are arranged at intervals along the direction surrounding the axis of the stirring shaft 120. In the first specific arrangement of the reinforced stirring member 140, two or more adjacent stirring units 130 can be connected to each other through the reinforced stirring member 140 to form a cage-type stirring group, and the stirring shaft 120 can be arranged at intervals. A cage mixing group. In the second specific arrangement of the reinforced stirring member 140, the adjacent stirring units 130 on the stirring shaft 120 are all connected to each other through the reinforced stirring member 140 to form an integrated cage stirring group. In the third specific arrangement of the reinforced stirring member 140, the reinforced stirring member 140 connected to the stirring unit 130 is not connected to the adjacent stirring unit 130. In order to facilitate the processing, maintenance and replacement of the enhanced stirring member 140, the first and third arrangements may be preferably adopted. The arrangement of the reinforced stirring member 140 can be adjusted according to the requirements of the grinding process, and is not limited to the specific arrangement exemplified above.

The reinforced stirring member 140 shown in FIG. 1 is in the shape of a thin straight rod. The extension line of the thin straight rod-shaped reinforced stirring member 140 is parallel to the axis of the stirring shaft 120, that is, the reinforced stirring member 140 extends in a direction parallel to the axis of the stirring shaft 120. The reinforced stirring member 140 shown in FIG. 3 is also in the shape of a thin straight rod, and the extension line of the reinforced stirring member 140 is different from the axis of the stirring shaft 120, that is, the reinforced stirring member 140 extends in a direction different from the axis of the stirring shaft 120. In addition to the thin straight rod shape, the reinforced stirring member 140 may also have a spiral rod shape, a flat plate shape, an arc-shaped plate shape, and the like, and it is not limited to the above-mentioned examples.

Optionally, when the adjacent stirring units 130 are not connected to each other through the reinforced stirring member 140, as shown in FIG. 2, there is provided between two adjacent reinforced stirring members 140 in the longitudinal direction (axial direction) of the stirring shaft 120 Reserve a gap, the ratio of the width of the reserved gap to the diameter of the grinding medium is greater than 2.

As another main functional element of the grinding movement, the reinforced agitator 140 is also extremely prone to wear and needs to be replaced in time. Optionally, in order to prolong the service life of the stirring device, the reinforced stirring member 140 may be made of wear-resistant alloy or a material with higher strength than the wear-resistant alloy. Optionally, a composite wear-resistant material layer may be provided on the surface of the reinforced stirring member 140.

Example 2

1 illustrates the cement clinker grinding implementation equipment 100 disclosed in this embodiment, which includes a housing 110, a screening device 160, and a stirring device. The stirring device includes a stirring shaft 120 that can be rotated by a driving system 150, and At least one stirring unit 130 in the axial direction of the stirring shaft 120, the two sides of the stirring unit 130 along the axial direction of the stirring shaft 120 form sub-grinding zones S, at least one reinforced stirring member 140 is connected to the stirring unit 130, and the reinforced stirring member 140 is Extending in the sub-grinding zone S, the reinforced stirring member 140 cooperates with the stirring unit 130 to make at least part of the grinding media and materials in the sub-grinding zone S perform grinding movement along the circumferential direction of the stirring shaft 120. The housing 110 includes a wall defining a horizontally extending stirring cavity 111, and a feed port 112 and a feed port 113 communicating with the stirring cavity 111. The stirring device is disposed in the stirring chamber 111 and includes a stirring shaft 120 and a stirring unit 130; the horizontally arranged stirring shaft 120 is at least partially inserted into the stirring chamber 111, and the stirring shaft 120 can be driven by the driving system 150 to rotate. Preferably, both ends of the stirring shaft 120 extend out of the housing 110 and are respectively mounted on the frame through supporting bearings. The stirring shaft 120 is provided with at least one stirring unit 130 along its axial direction. The stirring chamber 111 is filled with roughly spherical grinding media (not shown in the drawings). The materials (not shown in the drawings) enter the stirring chamber 111 from the feed port 112. The materials and grinding media pass through the stirring device and the reinforced stirring member 140. After mixing, a stream is formed. The impact, shear, and friction between the grinding media and between the grinding media and the inner wall of the stirring chamber 111 cause the materials to be gradually ground into materials, and the materials are discharged through the discharge port 113.

The specific implementation of the mixing device is determined according to the mixing method of the cement clinker grinding implementation equipment 100. Optionally, the mixing modes of the cement clinker grinding implementation equipment 100 can be roughly divided into three types: a) the shell 110 is stationary and the stirring device rotates; b) the shell 110 rotates, and the stirring device and the shell 110 rotate in opposite directions; c) The housing 110 rotates, and the stirring device rotates at a differential speed in the same direction as the housing 110. Under the condition of the stirring mode a, as shown in FIG. 1, the reinforced stirring member 140 and the stirring unit 130 of the stirring device can be connected to the stirring unit 130. Under the conditions of the stirring mode b and the stirring mode c, as shown in FIG. 5, the reinforced stirring member 140 may be connected to the shell 110; the reinforced stirring member 140 may also be connected to the shell 110. Due to the low energy consumption and high grinding efficiency of the mixing mode a, it can be well adapted to the grinding operation at high filling rate and high speed. Therefore, the cement clinker grinding implementation equipment 100 of this embodiment is preferably adopted as in Example 1. The stirring device is suitable for operating in stirring mode a.

The reinforced grinding member shown in FIG. 1 is in the shape of a thin straight rod. The extension line of the thin straight rod-shaped reinforced stirring member 140 is parallel to the axis of the stirring shaft 120, that is, the reinforced stirring member 140 extends in a direction parallel to the axis of the stirring shaft 120. The reinforced stirring member 140 shown in FIG. 3 is also in the shape of a thin straight rod, and the extension line of the reinforced stirring member 140 is different from the axis of the stirring shaft 120, that is, the reinforced stirring member 140 extends in a direction different from the axis of the stirring shaft 120. In addition to the thin straight rod shape, the reinforced stirring member 140 may also have a spiral rod shape, a flat plate shape, an arc-shaped plate shape, and the like, and it is not limited to the above-mentioned examples.

Optionally, when the stirring shaft 120 rotates in the stirring chamber 111, the stirring unit 130 rotates together with the stirring shaft 120. The stirring unit 130 protrudes radially from the stirring shaft 120 along the stirring shaft 120 and is the main functional element of the grinding. In the first specific implementation of the stirring unit 130, as shown in FIGS. 1 and 3, at least one stirring unit 130 is a disc-shaped blade 131, and at least one stirring unit 130 is a spiral blade 132, that is, inside the stirring chamber 111 There are at least two types of stirring units 130; a plurality of stirring units 130 are arranged at intervals along the axis of the stirring shaft 120, and the layout of different stirring units 130 is adjusted according to the requirements of the grinding process. In the second specific implementation of the stirring unit 130, as shown in FIG. 4, the multiple stirring units 130 provided on the stirring shaft 120 are all disk-shaped blades 131, and the disk-shaped blades 131 are arranged at intervals along the axial direction of the stirring shaft 120. In the third embodiment of the stirring unit 130, the stirring unit 130 is provided on the stirring shaft 120, wherein the multiple stirring units 130 are spiral blades 132, and the multiple spiral blades 132 are connected end to end in sequence. The shape and layout of the stirring unit 130 can be adjusted according to the requirements of the grinding process, and are not limited to the specific embodiments exemplified above.

As the main functional element of the grinding movement, the stirring unit 130 generally has a short service life and needs to be replaced in time. Optionally, the stirring unit 130 has a split structure, and the stirring unit 130 is formed by two or more split blades that can be separated or combined through bolt connection or other connection methods, which reduces the difficulty and difficulty of replacing the stirring unit 130. cost. In order to prolong the service life of the stirring unit 130, the stirring unit 130 may be made of a wear-resistant alloy or a material with a higher strength than the wear-resistant alloy. Optionally, a composite wear-resistant material layer may be provided on the surface of the stirring unit 130.

Optionally, the wall of the housing 110 surrounds the stirring device, and a gap W1 is provided between the wall and the stirring unit 130 of the stirring device, and the ratio of the width of the gap W1 to the diameter of the grinding medium is greater than 3. The wall forms an annulus R at the periphery of the stirring unit 130, and the sub-grinding area S drives the annulus R to make a grinding movement. Specifically, at least part of the grinding medium and material in the sub-grinding zone S is driven by the stirring device to make grinding movement around the stirring shaft 120, thereby prompting at least part of the grinding medium and material in the annular space R of the peripheral area of the stirring device to make grinding movement. When the adjacent stirring units 130 are not connected to each other by the reinforced stirring member 140, as shown in FIG. 2, a reserved gap W2 is provided between two adjacent reinforced stirring members 140 in the length direction (axial direction) of the stirring shaft 120 , The ratio of the width of the reserved gap W2 to the diameter of the grinding medium is greater than 3.

In order to increase the service life of the casing 110, the cross section of the stirring cavity 111 may be at least one of a circular shape, an oval shape, and a polygon shape. It is worth mentioning that the mixing chamber 111 with an elliptical and polygonal cross-section can encourage the material to form a material pad on the inner wall of the housing 110 and reduce the wear of the grinding medium and the material on the inner wall. Furthermore, the inner side of the wall is also provided with a wear-resistant liner. The wear-resistant liner is made of at least one of wear-resistant alloys, ceramics, nylon and polyurethane. According to the actual grinding process requirements, other materials can be used. It is made of wear-resistant materials and will not be listed here.

As another main functional element of the grinding movement, the reinforced agitator 140 is also extremely worn and needs to be replaced in time. Optionally, in order to extend the service life of the stirring unit 130, the reinforced stirring member 140 may be made of wear-resistant alloy or a material with higher strength than the wear-resistant alloy. Optionally, a composite wear-resistant material layer may be provided on the surface of the reinforced stirring member 140 .

In order to improve the heat dissipation performance of the housing 110, optionally, a cooling device 170 is provided outside the housing 110. The cooling device 170 is a circulating cooling layer and/or cooling fin. The circulating cooling layer may adopt a circulating air cooling channel or a circulating water cooling channel Decorated.

During the high-speed rotation of the stirring unit 130, the grinding medium tends to move against the wall, and a cavity area appears in the stirring chamber 111 close to the stirring shaft 120. If the feeding port 112 is provided on the side wall of the housing 110, Therefore, the feed port 112 is blocked by the material flow and cannot be fed normally, and the grinding media and materials in the mixing chamber 111 may even be thrown out of the mixing chamber 111 through the feed port 112. Optionally, the housing 110 has two ends, the axis of the stirring shaft 120 passes through the two ends of the housing 110, and the feed inlet 112 is provided on one of the ends M of the housing 110. Preferably, the inlet The material direction is aligned with the cavity area; the discharge port 113 is arranged at a non-central position of the other end N of the housing 110 or on the side wall close to the other end N. Preferably, in order to improve the stability of the stirring shaft 120, the feed port 112 is arranged at a non-central position of the end M of the shell 110; in order to further optimize the feeding method, an inclined channel may be provided at the feed port 112.

In order to facilitate discharging, a screening device 160 that separates the mixing chamber 111 and the discharge port 113 is provided in the housing 110. The sieve hole of the sieving device 160 is smaller than the diameter of the grinding medium, thereby separating the material from the grinding medium and preventing the grinding medium from being discharged from the discharge port 113, and the grinding medium only needs to be added without changing. Further, the sieving device at least includes a stationary sieve plate installed in the housing (110), and the diameter of the sieve hole of the sieve plate is smaller than the diameter of the grinding medium.

Optionally, a conveying gas is introduced into the stirring chamber 111, and the conveying air flow F is configured to enable the ground material to pass through the screening device 160 and convey to the outlet 113. As one of the power sources for material transmission, the conveying air flow F participates in the mixing and flow of the materials. On the one hand, part of the ground material and the material to be ground pass through the screening device 160 due to overflow, on the other hand, part of the material has been The grinding material passes through the screening device 160 under the wind force of the conveying air flow F and is conveyed out of the mixing chamber 111. The conveying gas and the overflow of the material work together to make the conveying gas speed 5-30m/s, preferably 15-25m/s. Preferably, the conveying air flow F drives the ground material to flow in the mixing chamber 111 in a direction parallel to the axial direction of the mixing shaft 120 and passing through the screening device 160. The mixing shaft 120 and the acting surface of the screening device 160 are approximately perpendicular, then The flow resistance of the conveying gas is the smallest, which can effectively reduce energy consumption, and the screening device 160 can directly contact the high-speed moving grinding medium, effectively preventing the material blocking problem at the screening device 160.

Due to the lack of viscous fluid such as water as the conveying medium, the material formed by the grinding movement in the sub-grinding zone S is difficult to flow to the discharge port 113 through the space between the stirring unit 130 and the inner wall of the stirring chamber 111, and the sub-grinding zone S is easy Over-grinding of materials has occurred. Optionally, the stirring unit 130 is provided with a flow hole, which is configured to allow the ground material to flow between the sub-grinding zones S in a direction parallel to the axial direction of the stirring shaft 120 and to the direction of the discharge port 113 mobile. On the other hand, the flow hole allows the conveying fluid to flow between the sub-grinding zones S in a direction parallel to the axial direction of the stirring shaft 120, further reducing the flow resistance of the conveying air flow F and reducing energy consumption. Preferably, the flow holes pass through in a direction parallel to the axis of the stirring shaft 120, and the flow holes are arranged at intervals in the circumferential direction of the stirring unit 130. The shape of the flow hole is not limited, and the size of the flow hole allows the grinding medium and materials to pass. Therefore, with the assistance of the conveying gas F, the ground material can be in the sub-grinding zone S in the direction parallel to the axial direction of the stirring shaft 120 Flow through and convey to the direction of the discharge port 113.

Optionally, the conveying air flow F can simultaneously dry and cool the material during the grinding process. On the one hand, the heat generated by the high-speed movement of the grinding media and materials promotes the loss of water in the materials. On the other hand, the conveying air flow F passing through the stirring chamber 111 may be formed by a cooling air flow or a drying air flow, or by switching between the cooling air flow and the drying air flow. When the temperature in the mixing chamber 111 is too high, the gypsum may be dehydrated into semi-hydrated gypsum, causing the cement to falsely set. At this time, the cooling airflow can effectively eliminate the above problems and maintain the cement clinker grinding implementation equipment 100 in a high-performance state ; When the temperature in the mixing chamber 111 is low, the drying airflow can assist the drying of the material.

Optionally, the sieving device 160 separates the mixing chamber 111 and the discharge port 113 to form a flow chamber 116 for gas-solid separation, and the flow chamber 116 can be used as a buffer area for separating materials and conveying air flow F. Since the discharge port 113 is arranged on the non-central position or side wall of the other end N of the housing 110, the material in the flow cavity 116 can sink to the discharge port 113 under the combined force of its own gravity and the conveying air flow F wind force. Separate from the conveying air flow F; preferably, the air outlet 115 of the housing 110 is separated from the discharge outlet 113, and a lock air valve is provided at the outlet 113; the air outlet 115 passes through the flow cavity 116 and is located above the outlet 113 , A height difference is provided between the discharge port 113 and the air outlet 115. In order to further optimize the discharge method, an inclined channel is provided at the air outlet 115.

Example 3

6 illustrates an open-flow cement grinding system 200 according to this embodiment, which includes a collecting device 207, a roller press 208, a powder selection component, a dust collection component, and the cement curing device as described in the embodiment. Material grinding implementation equipment 210; wherein the coarse material outlet of the powder separator is connected to the feed inlet of the collecting device 207, and the fine material outlet of the powder separator is connected to the feed inlet of the dust collecting module.

Optionally, the powder separator includes a powder separator B205 and a powder separator A204 connected in sequence, the powder separator B205 is preferably a VX static separator, and the powder separator A204 is preferably an XR high-efficiency powder separator; among them, a roller press The discharge port of 208 is connected to the inlet of the powder classifier B205 through the feeding device A206, the coarse material outlet of the powder classifier B205 is connected to the inlet of the collecting device 207, and the fine material outlet of the powder classifier B205 is connected to the powder classifier A204 The feed port of the powder separator A204 is connected to the coarse material outlet of the collecting device 207, and the fine material outlet of the powder separator A204 is connected to the dust collection assembly.

Optionally, the dust collection assembly includes a cyclone tube 203 and a dust collection device A201 connected in sequence; wherein the air inlet of the cyclone tube 203 is connected to the fine material outlet of the powder separator A204, and the air outlet of the cyclone tube 203 is connected to the dust collection device A201 The air inlet, the cyclone 203 and the discharge port of the dust collecting device A201 are all connected to the inlet of the cement clinker grinding implementation equipment 210 through the feeding device B209. The discharge port of the cement clinker grinding implementation equipment 210 is connected to a feeding device C212. In this embodiment, a fan A202 is provided behind the cyclone cylinder 203, and the fan A202 provides wind power for the cyclone cylinder 203 and the powder separator B205.

Optionally, the cement clinker grinding implementation device 200 is provided with air inlets and outlets and a conveying air flow is introduced. The air outlet of the cement clinker grinding implementation device is connected with a dust collecting device B211, and the dust collecting device B211 discharges the material to the feeding device C212.

The grinding method of the open-flow cement grinding system 200 of this embodiment includes:

a) The material enters the collecting device 207, and the collecting device 207 supplies the material to the roller press 208 for rolling;

b) The rolled materials are fed into the powder separator through the feeding device A206 for multi-stage separation; among them, the coarse-grained materials sorted by the powder separator B205 are returned to the collecting device 207 through the coarse-material outlet for coarse-material recycling, and fine-grained The material enters the feed port of the powder separator A204 from the fine material outlet of the powder separator B205 for the second sorting; the coarse-grained material sorted by the powder separator A204 is returned to the collecting device 207 through its coarse material outlet for recirculation. The granular material is discharged from the fine material outlet of the classifier A204 to the dust collection assembly;

c) The materials sorted by the powder selection component are separated from the gas and solid by the dust collection component, and the separated materials are discharged from the discharge port of the cyclone 203 and the dust collection device A201 to the feeding device B209;

d) The feeding device B209 transports the material to the cement clinker grinding implementation equipment 210 for grinding, and the finished product is discharged from the discharge port to the feeding device C and forms a pile.

Example 4

7 illustrates a semi-final cement grinding system 300 according to this embodiment, which includes a collecting device 309, a roller press 310 and a powder separator. The fine material outlet of the powder separator is connected to a dust collecting device A305. The coarse material outlet of the component is connected to the inlet of the collecting device 309, the intermediate material outlet of the powder selection component is connected to the inlet of the cement clinker grinding implementation equipment 311 as described in the embodiment, and the cement clinker grinding implementation equipment 311 The discharge port is connected to the feed port of the powder separator to form a cycle.

Optionally, the powder separator includes a powder separator B308 and a powder separator A306 connected to each other. The powder separator B308 is preferably a VX static separator, and the powder separator A306 is preferably an SRV vortex separator. Among them, the feed port of the powder separator B308 is connected to the discharge port of the roller press 310 through the feeding device D307, and the coarse material outlet of the powder separator B308 is connected to the feed port of the aggregate device 309 for coarse material recirculation. The fine material outlet is connected to the inlet of the classifier A306, the coarse material outlet of the classifier A306 is connected to the inlet of the collecting device 309; the fine material outlet of the classifier A306 is connected to the dust collection assembly, and the intermediate material of the classifier A306 The outlet is connected to the inlet of cement clinker grinding implementation equipment 311.

Optionally, the cement clinker grinding implementation device 200 is provided with air inlets and outlets and the conveying air flow is introduced, the air outlet of the cement clinker grinding implementation equipment 311 is connected to the dust collection device B312, and the cement clinker grinding implementation equipment 311 has an outlet and The outlet of the dust collector B312 is connected to the inlet of the powder separator A306 of the powder separator through the sequentially matched feeding device E313, feeding device A301 and feeding device B302. The discharge port of the dust collecting device A305 cooperates with the feeding device C303 to discharge materials. In this embodiment, a fan A304 is provided behind the dust collection device A305, and the fan A304 provides wind power for the dust collection device B312.

The grinding method of the semi-final cement grinding system 300 of this embodiment includes:

a) The material enters the collecting device 309, and the collecting device 309 supplies the material to the roller press 310 for rolling;

b) The rolled materials are sent to the powder separator through the feeding device D307 for multi-stage sorting; among them, the coarse-grained materials sorted by the powder separator B308 are returned to the collecting device 309 through the coarse material outlet for recirculation. Under the action, the fine material outlet of the classifier B308 enters the inlet of the classifier A306 for the second sorting;

c) The coarse-grained materials sorted by the classifier A306 are returned to the collecting device 309 through the coarse material outlet for recycling; the medium-grained materials are discharged from the medium outlet of the classifier A306 to the cement clinker grinding implementation equipment 311 for grinding; The fine material is discharged from the fine material outlet of the classifier A306 to the dust collection assembly;

d) The medium-grain materials sorted by the classifier A306 are ground by the cement clinker grinding implementation equipment 311, and the grinding materials are returned to the classifier A306 for sorting;

e) The fine-grained materials sorted by the powder selection component are separated from the gas and solid by the dust collection component, and the separated materials are discharged from the discharge port of the dust collection device A305 to the feeding device C303 for stacking.

Example 5

8 illustrates a combined circular flow cement grinding system 400 according to this embodiment, including an aggregate device 409, a roller press 410, a powder separator B407, and a cyclone 406 connected in sequence. The powder separator B407 is preferably VX static powder separator; among them, the coarse material outlet of the powder separator B407 is connected to the inlet of the collecting device 409, the fine material outlet of the powder separator B407 is connected to the air inlet of the cyclone 406, and the outlet of the cyclone 406 is connected to the regrind. Choose a circulation mechanism. Specifically, the regrind and reselection circulation mechanism includes the cement clinker grinding implementation equipment 411 and the powder separator A404 as described in the embodiment, which are connected in sequence, wherein the powder separator A404 is preferably an SRV vortex separator; cyclone 406 The discharge port is connected to the inlet of the cement clinker grinding implementation equipment 411. The cement clinker grinding implementation equipment 411 is connected to the feed inlet of the classifier A404 through the feeding device A401, and the fine material outlet of the classifier A404 is collected through dust The device A403 unloads the stock, and the coarse material outlet of the classifier A404 is connected to the inlet of the cement clinker grinding implementation equipment 411 to form a closed loop of regrinding and reselection.

Optionally, the cement clinker grinding implementation equipment 411 is provided with an air inlet and an air outlet, and the cement clinker grinding implementation equipment 411 is provided with conveying air flow, and the air outlet of the cement clinker grinding implementation equipment 411 is connected with dust collection Device A403, the discharge port of the dust collector A403 is connected to the feed port of the powder classifier A404 through the feeding device A401.

In this embodiment, a fan B405 is provided behind the cyclone cylinder 406, which provides wind power for the cyclone cylinder 406 and the powder separator B407; a fan A is provided behind the dust collection device A403, which is a dust collection device A403 and a powder separator A404 Provide wind power.

The grinding method of the combined circle flow cement grinding system 400 of this embodiment includes:

a) The material enters the collecting device 409, and the collecting device 409 supplies the material to the roller press 410 for rolling;

b) The rolled materials are sent to the powder separator B407 through the feeding device B408 for sorting; among them, the coarse-grained materials sorted by the powder separator B407 are returned to the collecting device 409 through the coarse-material outlet for coarse-material recycling, and the fine-grained materials The fine material exit of the powder separator B407 enters the cyclone 406 for gas-solid separation;

c) The material separated by the cyclone 406 is transported to the cement clinker grinding implementation equipment 411 for grinding, and the grinding material is transported to the classifier A404 through the feeding device A401 for re-sorting; the fine-grained material is sent from the classifier A404 fine material outlet Enter the dust collector A403 for gas-solid separation and unload the material to form a pile; the coarse material is returned from the coarse material outlet of the powder separator A404 to the cement clinker grinding implementation equipment 411 for recycling.

Example 6

9 illustrates a semi-final loop cement grinding system 500 according to this embodiment, which includes a collecting device 508, a roller press 509 and a powder separator. The fine material outlet of the powder separator is connected to the dust collecting module. The coarse material outlet of the powder assembly is connected to the feed inlet of the collecting device 508, and the intermediate material outlet of the powder selection assembly is connected to the regrind and reselection circulation mechanism. Specifically, the regrind and reselection recycling mechanism includes the cement clinker grinding implementation equipment 511 and the powder separator A514 as described in Example 2 which are connected in sequence, wherein the powder separator A514 is preferably an SRV vortex separator; The medium outlet of machine B505 is connected to the inlet of cement clinker grinding equipment 511, and the outlet of cement clinker grinding equipment 511 is connected to the inlet of powder classifier A514 through feeding device A513. Powder classifier A514 The fine material outlet is connected to the air inlet of the dust collecting device B515, the dust collecting device B515 discharges materials through the feeding device B510 to form a pile, and the coarse material outlet of the classifier A514 is connected to the inlet of the cement clinker grinding equipment 511 to form a regrind Re-election cycle.

Optionally, the cement clinker grinding implementation equipment 511 is provided with an air inlet and an air outlet, and the cement clinker grinding implementation equipment 511 is provided with a conveying air flow, and the air outlet of the cement clinker grinding implementation equipment 511 is connected with dust collection The discharge port of the device A512 and the dust collector A512 is connected to the feed port of the powder separator A514 through the feeding device A513.

Optionally, the powder separator includes a powder separator C507 and a powder separator B505. The powder separator C507 is preferably a VX static separator, and the powder separator B505 is preferably an SRV vortex separator; the coarse material outlet of the powder separator C507 Connect the feed inlet of the collecting device 508. Then, the fine material outlet of the classifier C507 is connected to the inlet of the classifier B505, and the coarse material outlet of the classifier B505 is connected to the inlet of the collecting device 508 for recycling. The medium material outlet of B505 regrinds and then selects the closed loop mechanism, and the fine material outlet of powder separator B505 is connected to the dust collection assembly. Among them, the dust collection assembly includes a cyclone 504 and a dust collection device C502. The inlet of the cyclone 504 is connected to the fine material outlet of the powder separator B505, and the air outlet of the cyclone 504 is connected to the inlet of the dust collection device. The cyclone 504 and the collection device The discharge port of the dust device C502 cooperates with the feeding device B510 to discharge materials to form a pile. In this embodiment, a fan C503 is provided behind the cyclone tube 504, which provides wind power for the cyclone tube 504 and the powder separator C507; a fan B501 is provided behind the dust collection device C502, and the fan B501 provides wind power for the dust collection device C502; A fan A516 is arranged behind the device B515, and the fan A516 provides wind power for the dust collection device B515.

The grinding method of the semi-final loop cement grinding system 500 of this embodiment includes:

a) The material enters the collecting device 508, and the collecting device 508 supplies the material to the roller press 509 for rolling;

b) The rolled materials are sent to the powder separator through the feeding device C506 for multi-stage separation; among them, the coarse-grained materials sorted by the powder separator C507 are returned to the collecting device 508 through the coarse-material outlet for coarse-material recycling, and fine-grained The material enters the powder separator B505 from the fine material outlet of the powder separator C507 for secondary sorting;

c) The coarse-grained materials sorted by the classifier B505 are returned to the collecting device 508 through the coarse-material outlet for coarse-grain recycling; the medium-grained materials are discharged from the medium-grain outlet of the classifier B505 to the regrinding and reselection closed-circuit circulation mechanism Cement clinker grinding implementation equipment 511; fine-grained materials are discharged from the fine material outlet of the powder concentrator B505 to the dust collection assembly with the wind for gas-solid separation, and discharged to form a pile;

d) The medium-grain materials separated by the powder separator are transported to the cement clinker grinding implementation equipment 511 for grinding, and the milled materials are transported to the classifier A514 through the feeding device A513 for re-sorting; the fine-grained materials are fined by the classifier A514 The material outlet enters the dust collector B515 for gas-solid separation, and the material is discharged to form a pile; the coarse-grained material is returned to the cement clinker grinding implementation equipment 511 from the coarse material outlet of the separator A514 for regrind and reselection.

Example 7

10 illustrates a semi-final open-flow cement grinding system 600 according to this embodiment, which includes a collecting device 608, a roller press 609, and a powder selection assembly connected in sequence, wherein the coarse material outlet of the powder selection assembly is connected The feed inlet of the collecting device 608 is recycled, the intermediate outlet of the powder separator is connected to the cement clinker grinding implementation equipment 610 and the dust collecting device A611 as described in Example 2 in turn, and the fine material outlet of the powder separator is connected to the collector Dust components.

Optionally, the cement clinker grinding implementation equipment 511 is provided with an air inlet and an air outlet, and the cement clinker grinding implementation equipment 511 is provided with conveying airflow, and the cement clinker grinding implementation equipment 511 is equipped with a dust collector A611 at the air outlet , The discharge port of the cement clinker grinding implementation equipment 511 and the discharge port of the dust collection device A611 are discharged through the matching feeding device A612 and the feeding device B613 in sequence.

Optionally, the powder separator includes a powder separator B607 and a powder separator A605 that are connected to each other. The powder separator B607 is preferably a VX static separator, and the powder separator A605 is preferably an SRV vortex separator; among them, the powder separator The feed port of B607 is connected to the discharge port of the roller press 609 through the feeding device C606, the coarse material outlet of the powder separator B607 is connected to the collecting device 608 feed port for recycling, and the fine material outlet of the powder separator B607 is connected to the powder separator The inlet of A605, the coarse material outlet of the classifier A605 is connected to the inlet of the collecting device 608 for recycling, the fine material outlet of the classifier A605 is connected to the dust collection assembly, and the middle material outlet of the classifier A605 is connected to the cement cooked The material grinding implementation equipment 610 feed inlet.

Optionally, the dust collection assembly includes a cyclone cylinder 604 and a dust collection device B602. The inlet of the cyclone cylinder 604 is connected to the fine material outlet of the powder separator A605, and the air outlet of the cyclone cylinder 604 is connected to the inlet of the dust collection device B602. The discharge port of the cylinder 604 and the discharge port of the dust collecting device B602 are matched with the feeding device B613 and the feeding device A612 connected in sequence to discharge materials and form a pile.

In this embodiment, a fan B603 is provided behind the cyclone tube 604, which provides wind power for the cyclone tube 604 and the powder separator B607; a fan A601 is provided behind the dust collection device B602, and the fan A601 is a dust collection device B602, a feeding device C606, The collecting device 608 and the roller press 609 provide wind power.

The grinding method of the semi-final open-flow cement grinding system 600 of this embodiment includes:

a) The material enters the collecting device 608, and the collecting device 608 supplies the material to the roller press 609 for rolling;

b) The rolled materials are sent to the powder separator through the feeding device C606 for multi-stage sorting; among them, the coarse-grained materials sorted by the powder separator C are returned to the collecting device 608 through the coarse material outlet for recirculation, and the fine-grained materials are separated by the The fine material outlet of powder machine C enters into powder classifier B607 for secondary sorting;

c) The coarse-grained materials sorted by the classifier B607 are returned to the collecting device 608 through the coarse-material outlet for recycling; the medium-grained materials are discharged from the medium outlet of the classifier B607 to the cement clinker grinding implementation equipment 610 inlet ; The fine material is discharged from the fine material outlet of the separator B607 to the dust collection assembly for gas-solid separation, and the material is discharged to form a pile;

d) The medium-grained material separated by the powder selection component is transported to the cement clinker grinding implementation equipment 610 for grinding, and the grinding material is discharged through the feeding device A612 and formed into a pile.

The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature or any new combination disclosed in this specification, and any new method or process step or any new combination disclosed.

Claims

A mixing device for cement clinker grinding equipment, comprising a mixing shaft (120) that can be rotated by a driving system (150), and at least one mixing unit (130) arranged in the axial direction of the mixing shaft (120), It is characterized in that the two sides of the stirring unit (130) along the axis of the stirring shaft (120) form sub-grinding zones (S), at least one reinforced stirring member (140) is connected to the stirring unit (130), and the reinforced The stirring member (140) extends in the sub-grinding zone (S) so that at least part of the grinding media and materials in the sub-grinding zone (S) make grinding movement along the circumferential direction of the stirring shaft (120).
The mixing device for cement clinker grinding equipment according to claim 1, wherein the reinforced mixing elements (140) are arranged at intervals in the circumferential direction of the mixing unit (130); at least two adjacent mixing elements The units (130) are connected to each other through a reinforced stirring member (140) and form a cage stirring group.
The mixing device for cement clinker grinding equipment according to claim 1, wherein the mixing unit (130) protrudes along the radial direction of the mixing shaft (120); at least two of the mixing units (130) Are arranged axially at intervals on the stirring shaft (120); the stirring unit (130) is provided with at least one flow hole, the flow hole is configured to allow at least part of the grinding media and materials to be parallel to the stirring shaft (120) The axial direction flows between the sub-abrasive zones (S).
The mixing device for cement clinker grinding implementation equipment according to any one of claims 1 to 3, characterized in that at least one of the reinforced mixing element (140) is a rod-shaped structure; the reinforced mixing element ( 140) is at least one of the first stirring member and the second stirring member, the extension line of the first stirring member is parallel to the axis of the stirring shaft (120), and the extension line of the second stirring member and the stirring shaft (120) ) Axis different planes.
The mixing device of cement clinker grinding equipment according to any one of claims 1 to 3, characterized in that at least one mixing unit (130) is a disc-shaped blade (131); and/or, at least One stirring unit (130) is a spiral blade (132).
The mixing device for cement clinker grinding implementation equipment according to any one of claims 1 to 3, characterized in that, the mixing unit (130) comprises at least two split blades that can be separated or combined, The at least two sub-blades are connected as a whole by bolts; the reinforced stirring member (140) and/or the stirring unit (130) are made of wear-resistant alloy; the reinforced stirring member (140) and/or the stirring unit ( 130) The surface has a composite wear-resistant material layer.
A cement clinker grinding implementation equipment for dry grinding of cement clinker, which is characterized in that it includes:

The housing (110) includes a wall defining a horizontally extending stirring chamber (111), and a feed port (112) and a feed port (113) communicating with the stirring chamber (111);

The stirring device includes a stirring shaft (120) extending into the stirring cavity (111) and at least one stirring unit (130) arranged on the stirring shaft (120);

A screening device (160) separating the mixing chamber (111) and the discharge port (113);

Wherein, two sides of the stirring unit (130) along the axial direction of the stirring shaft (120) form a sub-grinding zone (S), and the sub-grinding zone (S) is provided with at least one reinforced stirring element (140); The reinforced stirring member (140) extends in the sub-grinding zone (S) and cooperates with the stirring unit (130), so that at least part of the grinding media and materials in the sub-grinding zone (S) work in the circumferential direction of the stirring shaft (120). Grinding movement.
The cement clinker grinding implementation equipment according to claim 7, characterized in that the reinforced stirring member (140) is connected to a stirring unit (130), and the stirring unit (130) and the shell (110) Or, the reinforced stirring member (140) is connected to the casing (110), the casing (110) rotates, and the stirring unit (130) is opposite to the casing (110) Rotate.
The cement clinker grinding implementation equipment according to claim 8, characterized in that the reinforced stirring member (140) is connected to the stirring unit (130), and the reinforced stirring member (140) is on the circumference of the stirring unit (130). It is arranged at intervals in the direction; at least two adjacent stirring units (130) are connected to each other through a reinforced stirring member (140) and form a cage stirring group.
The cement clinker grinding implementation equipment according to claim 7, characterized in that at least one of the reinforced stirring member (140) is a rod-shaped structure; the reinforced stirring member (140) is at least a first stirring member and a second One of the stirring elements, the extension line of the first stirring element is parallel to the axis of the stirring shaft (120), and the extension line of the second stirring element is different from the axis of the stirring shaft (120).
The cement clinker grinding implementation equipment according to claim 7, characterized in that the stirring unit (130) protrudes along the radial direction of the stirring shaft (120); at least two of the stirring units (130) are located on the stirring shaft (120) The upper axis is spaced apart.
The cement clinker grinding implementation equipment according to claim 11, wherein at least one mixing unit (130) is a disc-shaped blade; and/or at least one mixing unit (130) is a spiral blade.
The cement clinker grinding implementation equipment according to claim 12, wherein the mixing unit (130) comprises at least two split blades that can be separated or combined, and the at least two split blades are connected by bolts to form One.
The cement clinker grinding implementation equipment according to claim 7, characterized in that the reinforced mixing element (140) and/or the mixing unit (130) are made of wear-resistant alloy; the reinforced mixing element (140) And/or the surface of the stirring unit (130) has a composite wear-resistant material layer.
The cement clinker grinding equipment according to claim 7, characterized in that a gap (W1) is provided between the wall and the mixing unit, and the ratio of the width of the gap (W1) to the diameter of the grinding medium is greater than 3; The wall forms an annulus (R) on the periphery of the stirring unit (130), and the sub-grinding area (S) drives the annulus (R) to make a grinding movement.
The cement clinker grinding equipment according to claim 7, characterized in that the cross section of the mixing chamber (111) is at least one of a circle, an ellipse and a polygon; the inner side of the wall is provided with The wear-resistant liner is made of at least one material of wear-resistant alloy, ceramic, nylon and polyurethane.
The cement clinker grinding implementation equipment according to claim 7, characterized in that a cooling device (170) is provided outside the shell (110); the cooling device (170) includes a circulating cooling layer and/or cooling sheet.
The cement clinker grinding implementation equipment according to claim 7, characterized in that the feed port (112) is provided on the end (M) of the shell (110), and the feed port (112) Feed in the cavity area around the stirring shaft (120).
The cement clinker grinding implementation equipment according to claim 18, characterized in that the feed port (112) is arranged at a non-central position of the end (M) of the shell (110), and the feed The port (112) is located in the upper part of the housing (110).
The cement clinker grinding implementation equipment according to any one of claims 9 to 19, characterized in that the conveying airflow (F) passed into the stirring chamber (111), the conveying airflow (F) is It is configured to enable the ground material to pass through the screening device (160) and be conveyed toward the discharge port (113).
The cement clinker grinding implementation equipment according to claim 20, characterized in that the mixing unit (130) is provided with at least one flow hole, and the flow hole is configured to allow at least part of the grinding medium and material along The direction parallel to the axial direction of the stirring shaft (120) flows between the sub-grinding zones (S); the conveying airflow (F) drives the ground material in the stirring chamber (111) along the axis parallel to the stirring shaft (120) Flow in the direction of and through the screening device (160).
The cement clinker grinding implementation equipment according to claim 21, characterized in that the flow hole penetrates in a direction parallel to the axis of the mixing shaft (120); the flow hole is located on the circumference of the mixing unit (130) Spaced in the direction.
The cement clinker grinding equipment according to claim 20, characterized in that the speed of the conveying airflow (F) is 5-30m/s; the conveying airflow (F) consists of cooling airflow and drying airflow One or two of them are switched to form.
The cement clinker grinding implementation equipment according to claim 20, characterized in that the screening device (160) is separated between the stirring chamber (111) and the discharge port (113) to form a gas-solid separation device Overflow cavity (116); the ground material in the overflow cavity (116) sinks to the discharge port (113) and is separated from the conveying airflow (F) under the combined force of its own gravity and the wind of the conveying airflow (F) .
The cement clinker grinding implementation equipment according to claim 24, characterized in that the shell (110) is provided with an air inlet (114) and an air outlet (115); the air outlet (115) is connected through the flow The cavity (116) is located above the discharge port (113); a height difference is provided between the air discharge port (115) and the discharge port (113).
The cement clinker grinding implementation equipment according to claim 20, characterized in that the ground material is separated from the grinding medium through a screening device (160); the screening device (160) at least includes a housing (110) The static sieve plate in ), the sieve hole diameter of the sieve plate is smaller than the diameter of the grinding medium.
An open-flow cement grinding system, characterized in that it comprises an aggregate device (207), a roller press (208), a powder selection assembly, a dust collection assembly, and any one of claims 7 to 26 connected in sequence The cement clinker grinding implementation equipment (210) is required; wherein the coarse material outlet of the powder separator is connected to the feed inlet of the collecting device (207), and the fine material outlet of the powder separator is connected to the feed of the dust collecting assembly mouth.
The open-flow cement grinding system according to claim 27, characterized in that the powder separator assembly includes a connected powder separator B (205) and a powder separator A (204), and the output of the roller press (208) The material port is connected to the feed port of the powder separator B (205), the coarse material outlet of the powder separator B (205) is connected to the feed port of the collecting device (207), and the fine material outlet of the powder separator B (205) is connected The inlet of the powder classifier A (204), the coarse material outlet of the powder classifier A (204) is connected to the inlet of the collecting device (207), and the fine material outlet of the powder classifier A (204) is connected to the dust collection assembly .
The open-flow cement grinding system according to claim 28, wherein the powder classifier A (204) is preferably an XR high-efficiency classifier; and the powder classifier B (205) is a VX static classifier.
The open-flow cement grinding system according to claim 28, characterized in that the cyclone (203) and the dust collector A (201) connected to the dust collection assembly in sequence, and the air inlet of the cyclone (203) is connected to the selection The fine material outlet of the powder machine A (204), the air outlet of the cyclone (203) are connected to the air inlet of the dust collector A (201), and the outlet of the cyclone 203 and the dust collector A (201) are connected to the cement The feed port of the material grinding equipment (210).
The open-flow cement grinding system of claim 28, wherein the cement clinker grinding implementation equipment (210) is provided with an air inlet and an air outlet, and the cement clinker grinding implementation equipment (210) is connected The airflow is conveyed, and the air outlet of the cement clinker grinding implementation device is provided with a dust collector B (211) for gas-solid separation.
A semi-final cement grinding system, which is characterized in that it comprises a collecting device (309), a roller press (310) and a powder separator. The fine material outlet of the powder separator is connected to a dust collecting device A (305). The coarse material outlet of the component is connected to the inlet of the collecting device (309), and the intermediate material outlet of the powder selection component is connected to the cement clinker grinding implementation equipment (311) according to any one of claims 7 to 26 The inlet and the outlet of the cement clinker grinding implementation equipment (311) are connected to the inlet of the powder separator to form a cycle.
The open-flow cement grinding system according to claim 32, wherein the powder separator includes a powder separator B (308) and a powder separator A (306) connected to each other, and the inlet of the powder separator B (308) The material port is connected to the discharge port of the roller press (310), the coarse material outlet of the powder separator B (308) is connected to the feed port of the collecting device (309), and the fine material outlet of the powder separator B (308) is connected to the powder separator The inlet of A (306), the coarse material outlet of the classifier A (306) is connected to the inlet of the collecting device (309), the fine material outlet of the classifier A (306) is connected to the dust collection assembly, and the powder classifier The intermediate material outlet of A (306) is connected to the inlet of cement clinker grinding implementation equipment (311).
The open-flow cement grinding system of claim 33, wherein the powder separator A (306) is an SRV vortex separator; and the powder separator B (308) is a VX static separator.
The open-flow cement grinding system according to claim 33, wherein the cement clinker grinding implementation equipment (210) is provided with an air inlet and an air outlet, and the cement clinker grinding implementation equipment (210) is connected to Conveying air flow, the air outlet of the cement clinker grinding implementation equipment (311) is connected to the dust collection device B (312), the discharge outlet of the dust collection device B (312) and the discharge of the cement clinker grinding implementation equipment (311) The ports are connected to the feed port of the powder separator A (306).
A combined circulation cement grinding system, characterized in that it comprises an aggregate device (409), a roller press (410), a powder separator B (407) and a cyclone (406) connected in sequence, wherein the powder separator The coarse material outlet of the machine B (407) is connected to the inlet of the collecting device (409), the fine material outlet of the powder separator B (407) is connected to the air inlet of the cyclone (406), and the outlet of the cyclone (406) is connected again. Grinding re-selection circulation mechanism; wherein the re-grinding and re-selection closed-circuit circulation mechanism includes the cement clinker grinding implementation equipment (411) and the connecting powder separator A (404) according to any one of claims 7 to 26 , The cement clinker grinding implementation equipment (411) is connected to the outlet of the cyclone (406), and the cement clinker grinding implementation equipment (411) is connected to the inlet of the separator A (404). The coarse material outlet of powder machine A (404) is connected to the inlet of cement clinker grinding implementation equipment (411) to form a regrind and reselection cycle. The fine material outlet of powder machine A (404) passes through dust collector A (403) Carry out gas-solid separation.
The open-flow cement grinding system of claim 36, wherein the cement clinker grinding implementation equipment (411) is provided with an air inlet and an air outlet, and the cement clinker grinding implementation equipment (411) is connected to Conveying air flow, the air outlet of the cement clinker grinding implementation equipment (411) is connected to the dust collector A (403), and the discharge port of the dust collector A (403) is connected to the powder separator A ( 404) the feed port.
The open-flow cement grinding system according to claim 36, wherein the classifier A (404) is an SRV vortex classifier; the classifier B (407) is preferably a VX static classifier.
A semi-final loop cement grinding system, which is characterized in that a collecting device (508), a roller press (509) and a powder selection component, the fine material outlet of the powder selection component is connected to the dust collection component, and the coarse powder selection component The material outlet is connected to the inlet of the collecting device (508), and the intermediate material outlet of the powder separator is connected to a regrind and reselection circulation mechanism; the regrind and reselection circulation mechanism includes a powder separator A (514) and as claimed in claims 7 to The cement clinker grinding implementation equipment (511) according to any one of the claims, the inlet of the cement clinker grinding implementation equipment (511) is connected to the intermediate outlet of the powder separator B (505), and the powder is selected The coarse material outlet of machine A (514) is connected to the inlet of cement clinker grinding equipment (511) to form a regrinding and reselection cycle. The fine material outlet of classifier A (514) passes through dust collector B (515) Carry out gas-solid separation.
The open-flow cement grinding system according to claim 39, wherein the powder separator includes a powder separator C (507) and a powder separator B (505), and the coarse material outlet of the powder separator C (507) is connected The inlet of the aggregate device (508), the fine material outlet of the powder separator C (507) is connected to the inlet of the powder separator B (505), and the coarse material outlet of the powder separator B (505) is connected to the aggregate device ( 508) The feed inlet is recirculated, the medium material outlet of the powder classifier B (505) is re-grinded and then the closed loop mechanism is selected. The fine material outlet of the powder classifier B (505) is separated from the gas and solid through the dust collection assembly.
The open-flow cement grinding system according to claim 40, characterized in that the dust collection assembly includes a cyclone (504) and a dust collection device C (502) connected in sequence, a cyclone (504) and a dust collection device C ( The discharge port of 502) cooperates with the feeding device B (510) to discharge.
The open-flow cement grinding system of claim 39, wherein the cement clinker grinding implementation equipment (511) is provided with an air inlet and an air outlet, and the cement clinker grinding implementation equipment (511) is connected to Conveying air flow, the air outlet of the cement clinker grinding implementation equipment (511) is connected with dust collecting device A (512), and the outlet of dust collecting device A (512) is connected to powder classifier A (through feeding device A (513)) 514) the feed port.
A semi-final open-flow cement grinding system, which is characterized in that it includes an aggregate device (608), a roller press (609) and a powder separator which are connected in sequence, wherein the coarse material outlet of the powder separator is connected to the aggregate device (608) The feed port, the middle material outlet of the powder separator is connected to the cement clinker grinding implementation equipment according to any one of claims 7 to 26 (610) The feed port, the fine powder separator The material outlet is connected to the dust collection component, the discharge port of the cement clinker grinding implementation equipment (610) and the dust collection component discharge port cooperate with the feeding device to discharge.
The open-flow cement grinding system of claim 43, wherein the powder separator includes a powder separator B (607) and a powder separator A (605), and the inlet of the powder separator B (607) is connected The discharge port of the roller press (609), the coarse material outlet of the classifier B (607) is connected to the inlet of the collecting device (608), and the fine material outlet of the classifier B (607) is connected to the classifier A (605) ), the coarse material outlet of the classifier A (605) is connected to the inlet of the collecting device (608), the fine material outlet of the classifier A (605) is connected to the dust collection assembly, and the powder classifier A (605) The intermediate material outlet of) is connected to the inlet of cement clinker grinding implementation equipment (610).
The open-flow cement grinding system according to claim 44, characterized in that the dust collection assembly comprises a cyclone (604) and a dust collection device B (602) connected in sequence, and the discharge port and collection of the cyclone (604) The discharge port of dust device B (602) is matched with the feeding device for discharge.
The open-flow cement grinding system of claim 44, wherein the powder separator A (605) is an SRV vortex separator; and the powder separator B (607) is a VX static separator.
The open-flow cement grinding system of claim 43, wherein the cement clinker grinding implementation equipment (511) is provided with an air inlet and an air outlet, and the cement clinker grinding implementation equipment (511) is connected The air flow is conveyed, and the air outlet of the cement clinker grinding implementation equipment (511) is provided with a dust collector A (611) for gas-solid separation.