Iron ore filling system

Abstract

The invention provides an iron ore filling system. The iron ore filling system comprises a conveying module, a thickening module, a water supply metering module, a cement supply module, a stirring module and a control module. The conveying module is composed of a conveying pipeline, a valve and a spiral conveyor. The thickening module is composed of a deep cone thickener; the water supply metering module comprises a slurry making pump, an overflow water pipe, a slurry making water pipe and a flow meter; the cement supply module is composed of a cement bin and further comprises a tailing slurry pipeline. The stirring module comprises a stirring bin; the deep-cone thickener is additionally arranged and used for thickening tailing slurry, so that the concentration of underflow is increased, the concentration of filling slurry is improved, the quality of a filling body is guaranteed, the influence of mining on the surrounding environment is reduced, the safety of underground operation is improved, and precious mineral resources are recycled to the maximum extent; the problems of collapse and ground pressure caused by the goaf are solved.

Description

Technical Field

[0001] The invention relates to the technical field of iron ore filling, and in particular to an iron ore filling system. Background Art

[0002] Iron ore filling refers to the process of sending appropriate filling materials into the iron ore goaf in a certain way, generally by pipeline transportation or gravity flow, in order to support the surrounding rock, reduce the risk of surface collapse, improve resource recovery rate and protect the environment. It is an indispensable technical means in the iron ore mining process. By selecting appropriate filling materials and processes, strengthening monitoring and control measures, the role and advantages of iron ore filling can be fully utilized, providing a strong guarantee for the sustainable development of iron ore mining.

[0003] A Chinese patent with publication number CN111852550A discloses a tailings paste filling equipment group and filling process, including an above-ground equipment group and an underground equipment group; the above-ground equipment group includes a paste thickener, a stirring filling machine, a glue powder feeder and a spiral electronic scale, a cyclone is provided on the top of the paste thickener, the overflow tank of the cyclone is connected to the feed tank of the paste thickener, the bottom flow of the cyclone and the bottom flow of the paste thickener are transported to the spiral electronic scale through a pipeline, the outlet of the glue powder feeder is connected to the feed end of the spiral electronic scale, and the discharge end of the spiral electronic scale is connected to the feed end of the stirring filling machine; the underground equipment group includes a filling well and a stage pusher mechanism arranged on the side of the filling well. The beneficial effects of the present invention are: the tailings are well mixed, the filling material is well uniform, and the filling efficiency is high.

[0004] As mentioned above, the patent provides a tailings paste filling equipment group and filling process, which has the functions of good tailings mixing, good filling material uniformity and high filling efficiency. However, the current filling station uses sand bin to make slurry, and the bottom flow concentration is low, resulting in low filling material slurry concentration and poor filling body quality, which affects the normal production order underground and causes problems such as collapse and ground pressure in the goaf. The overall construction efficiency needs to be improved. Summary of the invention

[0005] The present invention provides an iron ore filling system to solve the problems raised in the background technology.

[0006] In order to solve the above problems, the present invention provides an iron ore filling system, comprising a conveying module, a thickening module, a water supply metering module, a cement supply module, a stirring module and a control module; the conveying module is composed of a conveying pipeline, a valve and a screw conveyor; the thickening module is composed of a deep cone thickener; the water supply metering module includes a slurry pump, an overflow water pipe, a slurry water pipe and a flow meter; the cement supply module is composed of a cement silo, and the cement supply module also includes a tailings slurry pipeline; the stirring module includes a stirring silo; the control module is electrically connected to the conveying module, the thickening module, the water supply metering module, the cement supply module and the stirring module respectively; Among them, the tailings slurry pipeline and the slurry making water pipe are connected to the deep cone thickener. Flocculant is added to the deep cone thickener to increase the sedimentation rate of the tailings slurry and reduce the solid content of the overflow water of the sand bin; the high-concentration slurry treated by the deep cone thickener enters the mixing bin; the bulk cement in the cement silo is transported to the mixing bin by a screw conveyor, and the filling slurry stirred in the mixing bin is finally transported to the filling port for filling.

[0007] Preferably, the number of the deep cone thickener is set to one to replace the original four sand bins for storing tailings slurry.

[0008] Preferably, the overflow water from the sand bin discharged after the tailings slurry is densely settled in the deep cone thickener is returned to the overflow pool in the station, a part of which is used to fill the water in the station, and the excess flows back to the concentrator for recycling.

[0009] Preferably, the number of the cement silo, the screw conveyor and the mixing silo are all set to four; the high-concentration slurry treated by the deep cone thickener enters the four mixing silos respectively.

[0010] Preferably, the high-concentration slurry thickened by the deep cone thickener is delivered to the mixing bin through a delivery pipeline.

[0011] The beneficial effects of adopting the above technical solution are: 1. By adding a deep cone thickener, the tailings slurry is thickened by the deep cone thickener, thereby increasing the underflow concentration, improving the filling slurry concentration, ensuring the quality of the filling body, reducing the impact of mining on the surrounding environment, improving the safety of underground operations, maximizing the recovery of precious mineral resources, and solving the problems of collapse and ground pressure caused by goaf areas.

[0012] 2. By adding appropriate flocculants, the flocculants can increase the settling rate of the tailings slurry and reduce the solid content of the sand bin overflow water. The sand bin overflow water discharged after the tailings slurry is densely settled in the deep cone thickener is returned to the overflow pool in the station. Part of it is used to fill the water in the station, and the excess part flows back to the concentrator for recycling, thereby achieving full utilization of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Among them: 1. deep cone thickener; 2. cement silo; 3. screw conveyor; 4. mixing silo; 5. tailings slurry pipeline; 6. overflow water pipe; 7. slurry water pipe; 8. valve; 9. flow meter; 10. filling port; 11. slurry pump. DETAILED DESCRIPTION

[0015] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0016] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, a movable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] like Figure 1 As shown, in this embodiment, an iron ore filling system includes a conveying module, a thickening module, a water supply metering module, a cement supply module, a stirring module and a control module; the conveying module is composed of a conveying pipeline, a valve 8 and a screw conveyor 3; the thickening module is composed of a deep cone thickener 1; the water supply metering module includes a slurry pump 11, an overflow water pipe 6, a slurry water pipe 7 and a flow meter 9; the cement supply module is composed of a cement silo 2, and the cement supply module also includes a tailings slurry pipeline 5; the stirring module includes a stirring silo 4; the control module is electrically connected to the conveying module, the thickening module, the water supply metering module, the cement supply module and the stirring module respectively; Among them, the tailings slurry pipeline 5 and the slurry making water pipe 7 are connected to the deep cone thickener 1. Flocculant is added to the deep cone thickener 1 to increase the sedimentation rate of the tailings slurry and reduce the solid content of the overflow water of the sand bin; the high-concentration slurry treated by the deep cone thickener 1 enters the mixing bin 4; the bulk cement in the cement bin 2 is transported to the mixing bin 4 through the screw conveyor 3, and the filling slurry stirred in the mixing bin 4 is finally transported to the filling port 10 for filling.

[0019] Through the above technical solution, the slurry pump 11 is used to produce slurry water, and the slurry water pipe 7 is used to transport the slurry water. The overflow water pipe 6 is used for the circulation of overflow water, and the slurry water pipe 7 and the overflow water pipe 6 are both connected to the deep cone thickener 1. In addition, the tailings slurry pipe 5 is connected to the surface of the deep cone thickener 1, and the tailings slurry is transported by the tailings slurry pipe 5. When working, the tailings slurry with a weight concentration of more than 42% is sent to the deep cone thickener 1 in the filling station, and the slurry water pipe 7 is also connected to the deep cone thickener 1. The pipeline of 7 is connected to the flow meter 9, which can measure the water supply. When the tailings slurry is supplied to the deep cone paste thickener, a flocculant is added to the deep cone thickener 1 to increase the sedimentation rate of the tailings slurry and reduce the solid content of the sand bin overflow water. The sand bin overflow water discharged after the tailings slurry is densely settled is returned to the overflow pool in the station. A part of it is used to fill the water in the station, and the excess part flows back to the concentrator for recycling. The concentrated high-concentration slurry enters the mixing bin 4. The cement silo 2 is used to store the bulk cement transported by the transport truck. Cement is loaded, and then the bulk cement in the cement silo 2 is transported to the mixing silo 4 through the screw conveyor 3. After being fully mixed with the tailings slurry in a certain proportion, it flows into the mixing silo 4 by gravity to prepare a filling slurry with a weight concentration of 62%. This filling slurry is used to fill the filling port 10. When necessary, compressed air is introduced into the deep cone thickener 1 and the cement silo 2. If there is a lot of tailings at the bottom of the deep cone thickener 1, the dirty air flows down and is stirred evenly by the pneumatic force of the compressed air, and then lowered to ensure the uniformity of the treatment. The same is true inside the cement silo 2 to avoid solidification at the bottom of the cement silo 2. The solidified bulk cement is blown out by wind force. The deep cone thickener 1 is added as a whole, and the tailings slurry is thickened by the deep cone thickener 1, thereby increasing the bottom flow concentration, improving the concentration of the filling slurry, ensuring the quality of the filling body, reducing the impact of mining on the surrounding environment, improving the safety of underground operations, maximizing the recovery of precious mineral resources, and solving the problems of collapse and ground pressure caused by goafs.

[0020] Furthermore, the number of the deep cone thickener 1 is set to one, which replaces the original four sand bins for storing tailings slurry; the overflow water discharged after the tailings slurry in the deep cone thickener 1 is thickened and settled is returned to the overflow pool in the station, a part of it is used to fill the water in the station, and the excess part flows back to the concentrator for recycling; the number of the cement silo 2, screw conveyor 3 and mixing bin 4 are all set to four; the high-concentration slurry treated by the deep cone thickener 1 enters the four mixing bins 4 respectively; the high-concentration slurry thickened by the deep cone thickener 1 is delivered to the mixing bin 4 through a conveying pipe.

[0021] Through the above technical scheme, a new deep cone thickener 1 is added to replace the original four sand bins to store tailings slurry, and the underflow concentration is increased by adding flocculants. The whole process adopts a two-stage mixing gravity conveying process of high-concentration full tailings cementation filling. The cementitious material is cement. Four cement silos 2, screw conveyors 3 and mixing silos 4 are set. Each cement silo 2, screw conveyor 3 and mixing silo 4 is a group. Each group of cement silo 2, screw conveyor 3 and mixing silo 4 are connected through a conveying pipeline. At the same time, a valve 8 is connected on the conveying pipeline to control the flow of fluid on the conveying pipeline. The high-concentration slurry treated by the deep cone thickener 1 enters the four mixing silos 4 respectively, and is connected to the four mixing silos 4 through a conveying pipeline, and is mixed with bulk cement from the cement silo 2. The overflow water pipe 6 discharged from the tailings slurry in the deep cone thickener 1 after dense sedimentation is returned to the overflow pool in the station, a part of which is used to fill the water in the station, and the excess part flows back to the concentrator for recycling, thereby realizing the full utilization of water resources.

[0022] Finally, it should be noted that the above implementation cases are only used to illustrate the present invention, rather than to limit the technical solutions described in the present invention; therefore, although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered by the scope of the claims of the present invention; the technology not described in detail in the present invention is implemented with the prior art.

Claims

1. An iron ore filling system, characterized in that: The invention comprises a conveying module, a thickening module, a water supply metering module, a cement supply module, a stirring module and a control module; the conveying module is composed of a conveying pipeline, a valve (8) and a screw conveyor (3); the thickening module is composed of a deep cone thickener (1); the water supply metering module comprises a slurry pump (11), an overflow water pipe (6), a slurry water pipe (7) and a flow meter (9); the cement supply module is composed of a cement silo (2), and the cement supply module also comprises a tailings slurry pipeline (5); the stirring module comprises a stirring silo (4); the control module is electrically connected to the conveying module, the thickening module, the water supply metering module, the cement supply module and the stirring module respectively; The tailings slurry pipeline (5) and the slurry water pipe (7) are connected to the deep cone thickener (1). A flocculant is added to the deep cone thickener (1) to increase the sedimentation rate of the tailings slurry and reduce the solid content of the overflow water. The high-concentration slurry treated by the deep cone thickener (1) enters the mixing bin (4). The bulk cement in the cement bin (2) is transported to the mixing bin (4) via a screw conveyor (3). The filling slurry stirred in the mixing bin (4) is finally transported to the filling port (10) for filling.

2. An iron ore filling system according to claim 1, characterized in that: The number of the deep cone thickener (1) is set to one, which is used to replace the original four sand bins to store tailings slurry.

3. The iron ore filling system according to claim 1, characterized in that: The overflow water discharged after the tailings slurry is thickened and settled in the deep cone thickener (1) is returned to the overflow pool in the station, a part of which is used to fill the water in the station, and the excess flows back to the concentrator for recycling.

4. The iron ore filling system according to claim 1, characterized in that: The number of the cement silo (2), the screw conveyor (3) and the mixing silo (4) is set to four; the high-concentration slurry processed by the deep cone thickener (1) enters the four mixing silos (4) respectively.

5. The iron ore filling system according to claim 1, characterized in that: The high-concentration slurry thickened by the deep cone thickener (1) is delivered to the mixing bin (4) through a delivery pipeline.

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