A method for increasing production of a raw material two-stage grinding system and a system thereof

Abstract

This invention discloses a method and system for increasing the production capacity of a two-stage raw material grinding system. The method reduces the load on the return material to the ball mill by using the rod mill in the coarse grinding stage to receive part of the online circulating return material and the spare grinding efficiency, thereby releasing the ball mill's capacity to process new raw ore and thus increasing production capacity. This invention effectively alleviates the saturation state of the ball mill, provides a margin for the system to process additional raw ore, and significantly improves the overall grinding capacity.

Description

Technical Field

[0001] This invention relates to a method and system for increasing the production capacity of a two-stage raw material milling system, belonging to the field of abrasive technology. Background Technology

[0002] The existing dual-grinding system consists of a rod mill and a ball mill, with the rod mill used for coarse grinding and the ball mill for fine grinding. The material processed by the rod mills enters a hydrocyclone for classification, and unqualified bottom material is returned to the ball mill for refrinsing. This leads to an increase in the ball mill's throughput, pushing it towards saturation and limiting production increases. Simultaneously, the overflow from the hydrocyclone enters a pre-desiliconization tank for desiliconization. The bottom material discharged from the pre-desiliconization tank contains a mixture of coarse and fine particles, which the original process returned entirely to the ball mill, further increasing the ball mill's load and preventing it from processing additional raw ore. This severely restricts the system's production capacity.

[0003] In other words, there is a need for a two-stage raw material grinding system that can effectively alleviate the saturation state of ball mills, provide a margin for the system to process additional raw materials, and significantly improve the overall abrasive production capacity. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a method and system for increasing the production capacity of a two-stage raw material mill system, which effectively alleviates the saturation state of the ball mill, provides a margin for the system to process additional raw ore, and significantly improves the overall abrasive production capacity; it can overcome the shortcomings of the prior art.

[0005] The objective of this invention is achieved through the following technical solution: This invention discloses a method for increasing production in a two-stage raw material grinding system. This method reduces the load on the return material to the ball mill by utilizing the efficiency of the coarse grinding rod mill to receive part of the online circulating return material and the spare grinding material, thereby releasing the ball mill's ability to process new raw ore and thus increasing production.

[0006] The aforementioned method involves diverting a portion of the unqualified bottom material after hydrocyclone grading to an unsaturated rod mill for processing. By utilizing the rod mill to share the return material load of the ball mill, a load reduction is achieved, thereby freeing up the ball mill's capacity to process new raw ore and thus increasing production.

[0007] As mentioned above, all the bottom material from the pre-desiliconization tank is first returned to the hydrocyclone for further classification, and then the bottom material from the hydrocyclone is combined and diverted back to the rod mill and ball mill for secondary load reduction.

[0008] A system for increasing the production capacity of a two-stage raw material mill includes a rod mill and a ball mill. The discharge pipes of the rod mill and the ball mill are sequentially connected to an intermediate tank and a hydrocyclone. The hydrocyclone has a feed pipe and an overflow pipe at its upper end and an underflow pipe at its lower end. The underflow pipe has branch pipes connected to the feed inlets of the rod mill and the ball mill. The overflow pipe is connected to a pre-desilicon tank. The underflow from the pre-desilicon tank is recycled back to the hydrocyclone, and the overflow material from the pre-desilicon tank is sent to subsequent processes.

[0009] The aforementioned hydrocyclone consists of multiple sub-cyclones, and the underflow of the pre-desilicon tank is connected to the feed port of one of the sub-cyclones.

[0010] As mentioned above, a flow meter and a flow regulating valve are installed on the branch pipe.

[0011] As mentioned above, a feed pump is provided between the intermediate tank and the hydrocyclone.

[0012] Compared with the prior art, the beneficial effects of the present invention are: In the prior art of this invention, the normal practice for returning materials is to feed all the bottom material from the hydrocyclone into the ball mill, aiming to completely solve the problem of substandard returned materials through fine grinding in the ball mill. However, during normal production, the ball mill is required to operate at full capacity, so the desiliconization returned materials will occupy a portion of its capacity, while the coarse grinding rod mill is in an unsaturated state.

[0013] Therefore, allowing the rod mill to share some of the circulating return material not only meets the basic requirements of online material circulation but also frees up some of the ball mill's capacity for processing raw ore, which is highly beneficial for increasing production. Furthermore, although the rod mill cannot perform fine grinding on the return material, it can still perform some processing itself, bringing the return material to a partially qualified level, thus providing the first layer of load reduction for the ball mill.

[0014] Meanwhile, all the bottom material from the pre-desilicon tank is returned to the hydrocyclone for re-classification. Since the bottom material from the pre-desilicon tank contains both qualified and unqualified portions, compared to the original method of returning all the bottom material from the pre-desilicon tank to the ball mill, re-classification allows for the screening of qualified portions first, with only the unqualified portions being returned. This reduces the total amount of returned material, thus providing a secondary reduction in the workload of the ball mill.

[0015] By combining the operation of the rod mill to share some of the return material, the return material from the pre-desilicon tank 6 effectively reduces the load on the ball mill 2. This method can effectively alleviate the saturation state of the ball mill, provide a margin for the system to process additional raw ore, and thus significantly improve the overall abrasive production capacity.

[0016] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will now be described in further detail with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the three-dimensional connection structure of the present invention.

[0018] Among them, rod mill 1; ball mill 2; intermediate tank 3; hydrocyclone 4; branch pipe 5; pre-desilicon tank 6; sub-cyclone 7. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0020] like Figure 1 As shown, this invention discloses a method for increasing production in a two-stage raw material grinding system. This method achieves increased production by doubly reducing the load on the return material to the ball mill 2. The rod mill 1, used for coarse grinding, receives part of the online circulating return material and the remaining grinding capacity, thus freeing up the ball mill 2's capacity to process new raw ore. Specifically, some of the unqualified bottom material after classification by the hydrocyclone 4 is diverted to the unsaturated rod mill 1 for processing. The rod mill 1 then shares the load of the return material from the ball mill 2, completing one stage of load reduction. To increase production, the capacity of ball mill 2 to process new raw ore is increased. All bottom material from pre-desilicon tank 6 is first returned to hydrocyclone 4 for further classification, then the bottom material from hydrocyclone 4 is diverted back to rod mill 1 and ball mill 2 for secondary load reduction. Currently, the normal return process involves feeding all bottom material from hydrocyclone 4 into ball mill 2, aiming to thoroughly resolve the issue of substandard return material through fine grinding in ball mill 2. However, during normal production, ball mill 2 requires full-saturation operation; therefore, return material occupies a portion of the production capacity. However, the rod mill 1, which performs coarse grinding, is not in a saturated state. Therefore, by sharing part of the circulating return material with the rod mill 1, the basic requirements for online material circulation are met. At the same time, it frees up some of the raw ore processing capacity for the ball mill 2, which is conducive to increasing production. Moreover, although the rod mill 1 cannot perform fine grinding on the return material, it can still perform some processing itself, making the return material partially qualified. The rod mill 1 achieves the first level of load reduction for the ball mill 2. Furthermore, by returning all the bottom material of the pre-desilicon trough 6 to the hydrocyclone 4 for further processing... The grading process is crucial because the bottom material of the pre-desiliconization tank 6 contains a mixture of qualified and unqualified portions. Compared to returning all the bottom material from the pre-desiliconization tank 6 to the ball mill 2, this second grading first separates the qualified portion, allowing the unqualified portion to be returned. This reduces the total amount of returned material and lightens the load on the ball mill 2, effectively reducing its workload a second time. Furthermore, by having the rod mill 1 share some of the returned material, the return material from the pre-desiliconization tank 6 further reduces the load on the ball mill 2. This effectively alleviates the saturation state of the ball mill, providing a margin for the system to process additional raw ore and significantly improving the overall grinding capacity.

[0021] This raw material dual-stage grinding system improves production capacity. It includes a rod mill 1 and a ball mill 2. The discharge pipes of the rod mill 1 and the ball mill 2 are connected sequentially to an intermediate tank 3 and a hydrocyclone 4. The hydrocyclone 4 has a feed pipe and an overflow pipe at its upper end and an underflow pipe at its lower end. The underflow pipe has a branch pipe 5 connected to the feed inlets of the rod mill 1 and the ball mill 2. The overflow pipe is connected to a pre-desiliconization tank 6. The underflow from the pre-desiliconization tank 6 is recycled back to the hydrocyclone 4, and the overflow material from the pre-desiliconization tank 6 is sent to subsequent processes. A feed pump is installed between the intermediate tank 3 and the hydrocyclone 4. This system can effectively alleviate the saturation state of the ball mill, provide a margin for the system to process additional raw ore, and significantly improve the overall grinding capacity.

[0022] Furthermore, the hydrocyclone 4 is composed of multiple sub-cyclones 7. The underflow of the pre-desilicon trough 6 is connected to the feed inlet of one of the sub-cyclones 7. Because the return material of the pre-desilicon trough 6 is small, it only needs to enter one sub-cyclone 7 for targeted processing, thus avoiding mixing with the material of the rod mill 1 and the ball mill 2 and increasing the screening burden.

[0023] Furthermore, a flow meter and a flow regulating valve are installed on the branch pipe 5. The flow meter helps to control the amount of return material distributed to the rod mill 1 and the ball mill 2, and facilitates the adjustment of the flow rate as needed.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present invention and based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method of increasing production in a raw material two-stage grinding system, characterized by, This method reduces the load on the return material to the ball mill (2) by using the coarse grinding rod mill (1) to take on part of the online circulating return material and the efficiency of the spare grinding material, thereby releasing the ball mill (2)’s ability to process new raw ore and thus increasing production.

2. The method of increasing production of a raw material two-stage mill system of claim 1, wherein, The unqualified bottom material after being classified by the hydrocyclone (4) is partially diverted to the rod mill (1) which is in an unsaturated state for processing. The rod mill (1) is used to share the return material of the ball mill (2) to complete a load reduction, thereby releasing the ball mill (2)'s ability to process new raw ore and thus increase production.

3. The method of increasing production of a raw material two-stage mill system of claim 1, wherein, All the bottom material in the pre-desiliconization tank (6) is first returned to the hydrocyclone (4) for re-grading, and then the bottom material in the hydrocyclone (4) is returned to the rod mill (1) and ball mill (2) for secondary load reduction.

4. A system for increasing production of a raw material two-stage grinding system, characterized by, It includes a rod mill (1) and a ball mill (2). The discharge pipes of the rod mill (1) and the ball mill (2) are connected in sequence to an intermediate tank (3) and a hydrocyclone (4). A feed pipe and an overflow pipe are provided at the upper end of the hydrocyclone (4), and an underflow pipe is provided at the lower end of the hydrocyclone (4). A branch pipe (5) connected to the feed inlet of the rod mill (1) and the ball mill (2) is provided on the underflow pipe. The overflow pipe is connected to a pre-desilicon tank (6). The underflow of the pre-desilicon tank (6) is circulated back to the hydrocyclone (4), and the overflow material of the pre-desilicon tank (6) goes to the subsequent process.

5. The system for increasing production of a raw material two-stage grinding system according to claim 4, characterized by, The hydrocyclone (4) consists of multiple sub-cyclones (7), and the underflow of the pre-desilicon tank (6) is connected to the inlet of one of the sub-cyclones (7).

6. The system for increasing production of a raw material two-stage grinding system according to claim 4, characterized by, A flow meter and a flow regulating valve are provided on the branch pipe (5).

7. The system for increasing production of a raw material two-stage mill system of claims 4-6, wherein, A feed pump is provided between the intermediate tank (3) and the hydrocyclone (4).

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