Ore pulp production system

Abstract

The utility model relates to an ore pulp production system which comprises a raw material bin, a crushing unit and a grinding unit are arranged on the downstream of the raw material bin in parallel, and a sorting unit is arranged on the downstream of the crushing unit; the crushing unit is used for crushing part of ore in the raw material bin, and the sorting unit is used for sorting crushed powder; and the grinding unit is used for grinding the sorted super-large particles and the ores in the raw material bin, converging the ground superfine slurry and the sorted medium and large particles and introducing the mixture into the kneading machine. According to the slurry prepared by the ore pulp production system, the particle size distribution of non-metal ore pulp can be changed, the flowability and pulping concentration of the ore pulp can be improved, the proportion of large particles and superfine particles in the ore pulp can be increased, and meanwhile, the particle stacking density can be improved.

Description

Technical Field

[0001] This application relates to the field of non-metallic mineral slurry production, and more specifically, to a slurry production system. Background Technology

[0002] In the non-metallic mineral slurry preparation process, the quality of the slurry is mainly defined by its concentration, fineness, and flowability. The concentration of the non-metallic mineral slurry has a significant impact on the beneficiation process. Higher non-metallic mineral slurry concentrations can increase throughput, yield, and reduce production costs.

[0003] Currently, in the preparation of non-metallic mineral slurries, there are still some challenges and limiting factors in actual production. For example, the differences in slurry-forming properties of non-metallic ores from different origins and of different qualities make it difficult to achieve the ideal raw material slurry concentration.

[0004] Meanwhile, some outdated production equipment and processes may limit further increases in the concentration of non-metallic mineral slurries. Traditional grinding equipment generally uses rod mills or ball mills, which have unscientific particle size distributions, with too many medium particles and too few fine and medium-to-large particles. All slurries must have a sufficient amount of fine particles or ultrafine particles larger than 325 mesh to provide flowability and gradation filling properties; otherwise, the slurry concentration will be low and the flowability will be poor. In addition, all slurries must also have a certain amount of medium-to-large particles; otherwise, the low content of these main materials will directly affect the gradation effect and bulk density, and the low bulk density due to excessive gaps between particles will directly affect the slurry concentration.

[0005] In view of this, a slurry production system is proposed to change the particle size distribution of non-metallic slurry and improve its fluidity and concentration. Utility Model Content

[0006] The purpose of this application is to provide a slurry production system that can change the particle size distribution of non-metallic slurry, improve the fluidity and concentration of slurry, increase the proportion of large and ultrafine particles in slurry, and improve particle bulk density.

[0007] To achieve the above objectives, this utility model provides a slurry production system, including: a raw material silo, a crushing unit and a grinding unit arranged in parallel downstream of the raw material silo, and a sorting unit arranged downstream of the crushing unit;

[0008] The crushing unit is used to crush part of the ore in the raw material bin, and the sorting unit is used to sort the crushed powder.

[0009] The grinding unit is used to grind the sorted ultra-large particles and the ore in the raw material bin, and to combine the ground ultra-fine slurry with the sorted medium and large particles and feed it into the kneader.

[0010] In a further embodiment, the grinding unit includes a first grinding subunit and a second grinding subunit arranged in succession. The first grinding subunit includes a grinding mill, which is connected to a grinding water pipeline for preliminary grinding of ultra-large particles and mineral materials to obtain a coarse raw material slurry.

[0011] The second grinding subunit includes an ultrafine grinding mill, which is used to grind coarse raw material slurry into ultrafine slurry.

[0012] In a further embodiment, a first belt scale is provided downstream of the raw material silo, the crushing unit includes a crusher located downstream of the first belt scale, and the sorting unit includes an air classifier located downstream of the crusher, the air classifier being connected to a compressed air pipeline for providing sorting air.

[0013] In a further embodiment, the air separator includes an air inlet and an air separation chamber, and the compressed air pipeline is connected to the air inlet.

[0014] In a further embodiment, the air separator is connected to a medium-to-large particle bin and an ultra-large particle bin via pipelines. A second belt scale is also installed downstream of the raw material bin. An elevator is installed between the ultra-large particle bin and the second belt scale. The elevator is used to lift the ultra-large particle material to the second belt scale.

[0015] In a further embodiment, the grinding mill is located downstream of the second belt conveyor.

[0016] In a further embodiment, the grinding mill is connected to a coarse slurry tank via a pipeline, the coarse slurry tank is connected to a coarse slurry pump via a pipeline, and the coarse slurry pump is connected to the ultrafine grinding mill via a pipeline.

[0017] In a further embodiment, the ultrafine mill is connected to an ultrafine slurry tank via a pipeline, the ultrafine slurry tank is connected to an ultrafine slurry pump via a pipeline, and the ultrafine slurry pump is connected to the kneader via a pipeline.

[0018] In a further embodiment, the medium and large particle bin is connected to the kneader via a pipeline, the kneader being used to mix the ultrafine slurry and the medium and large particles.

[0019] In a further embodiment, the kneader is connected to a product slurry tank via a pipeline, the product slurry tank being used to receive and store the mixed product slurry.

[0020] In this invention, non-metallic minerals in the raw material silo are crushed and ground separately. The ultra-large particles obtained from crushing and sorting are ground into ultra-fine slurry, and the ultra-fine slurry is mixed with medium and large particles obtained from crushing and sorting to obtain product slurry, thereby changing the particle size distribution and improving the concentration and fluidity of the product slurry.

[0021] Specifically, the non-metallic minerals in the raw material silo are crushed and sorted by a crusher to obtain ultra-large and medium-large particles. The sorted ultra-large particles and some of the non-metallic minerals in the raw material silo are fed into a grinding mill for preliminary grinding. The ground non-metallic coarse raw material slurry is then subjected to a second ultra-fine grinding in an ultra-fine grinding mill and mixed with the crushed and sorted medium-large particles to obtain the product slurry.

[0022] The main technical objective of this invention is to change the particle size distribution of non-metallic mineral slurry, thereby improving the overall concentration and fluidity of the non-metallic mineral slurry.

[0023] The slurry production system of this utility model can obtain unqualified ultra-large particles and medium-to-large particles by crushing some raw materials and sorting the crushed powder. The ultra-large particles are further ground twice to obtain an ultra-fine slurry. The ultra-fine slurry is then mixed with the sorted medium-to-large particles to make the particle size distribution more ideal, thereby improving the overall particle bulk density and increasing the material concentration. This saves energy and reduces production costs for subsequent processes.

[0024] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This application includes a schematic diagram of the overall structure of the slurry production system.

[0027] icon:

[0028] 10-Raw material warehouse; 11-First belt weigher; 12-Second belt weigher;

[0029] 20 - Crushing unit; 21 - Crusher;

[0030] 30-Grinding unit; 31-First grinding subunit; 31a-Grinding machine; 31b-Grinding water pipeline;

[0031] 32 - Second grinding subunit; 32a - Ultrafine grinding mill;

[0032] 33-Coarse slurry tank; 34-Coarse slurry pump; 35-Ultrafine slurry tank; 36-Ultrafine slurry pump;

[0033] 40 - Sorting unit; 41 - Air classifier; 41a - Jet inlet; 41b - Air classifier chamber;

[0034] 42 - Compressed air pipeline;

[0035] 50-Mixer;

[0036] 60-Medium and large particle bins;

[0037] 70-Extra-large particle bin;

[0038] 80- Hoist;

[0039] 90 - Product slurry tank. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] The slurry production system in this application is mainly used for the preparation and production of non-metallic slurry. By setting up necessary equipment and assembling the equipment in the process, the particle size distribution of non-metallic slurry can be adjusted to meet the gradation requirements of ultrafine particles and medium and large particles in the product slurry, and to ensure that the slurry is maintained at a relatively high level of packing and sealing, thereby improving the fluidity and concentration of the slurry.

[0044] In this application, the main technical route includes producing medium and large particles and ultrafine slurry by crushing non-metallic mineral raw materials and ultrafine grinding, and mixing the medium and large particles and ultrafine slurry with water in a kneader to obtain a product slurry that meets the particle size distribution requirements.

[0045] To clearly distinguish between different particle sizes, the medium-to-large particle materials in this application have a particle size of 20-120 mesh, with particles of 40-100 mesh accounting for more than 70%. The ultrafine slurry materials have a particle size of 200-600 mesh, with particles smaller than 325 mesh being classified as ultrafine particles, and ultrafine particles accounting for more than 50%. In the product slurry, both medium-to-large particle materials and ultrafine slurry account for 50%.

[0046] See Figure 1 The slurry production system in this application includes: a raw material silo 10, a crushing unit 20 and a grinding unit 30 arranged in parallel downstream of the raw material silo 10, and a sorting unit 40 arranged downstream of the crushing unit 20. The crushing unit 20 is mainly used to crush some non-metallic materials in the raw material silo 10, and after crushing, the crushed powder is sorted by the sorting unit 40 to obtain ultra-large particles and medium-large particles.

[0047] The grinding unit 30 is used to grind the sorted ultra-large particles and the ore in the raw material bin 10 twice, and the ultra-fine slurry obtained after grinding is combined with the sorted medium and large particles and fed into the kneader 50. The kneader 50 mixes the ultra-fine slurry and the medium and large particles to finally obtain a product slurry that meets the particle size distribution requirements.

[0048] In this application, the sorted ultra-large particles and some non-metallic minerals in the raw material bin 10 are mixed and then ground twice to obtain an ultra-fine slurry.

[0049] Specifically, the raw material silo 10 is a storage device for non-metallic ores. Two belt weighing machines are connected to the bottom two sides. The non-metallic ores fall onto the two belt weighing machines by gravity and are weighed by the belt weighing machines before being sent to the crusher 21 and the grinding mill 31a respectively.

[0050] The grinding unit 30 includes a first grinding sub-unit 31 and a second grinding sub-unit 32 arranged in succession. The first grinding sub-unit 31 is mainly used for coarse grinding of mineral materials, and the second grinding sub-unit 32 is mainly used for ultrafine grinding of the coarse raw material slurry obtained from coarse grinding, and finally obtains an ultrafine slurry.

[0051] Furthermore, the first grinding subunit 31 includes a grinding mill 31a, which coarsely grinds the ultra-large particles and some of the mineral materials in the raw material bin 10. The grinding mill 31a is connected to a grinding water pipeline 31b for introducing grinding water to perform preliminary grinding of the ultra-large particles and mineral materials to obtain a coarse raw material slurry.

[0052] The second grinding subunit 32 includes an ultrafine mill 32a, which is used to grind the coarse raw material slurry into an ultrafine slurry.

[0053] Downstream of the raw material silo 10 is a first belt weigher 11, which is mainly used for quantitative weighing of crushed ore. The crushing unit 20 includes a crusher 21 located downstream of the first belt weigher 11, which crushes the ore fed by weighing. After crushing, the main products are ultra-large particles and medium-to-large particles. The crusher 21 is a special crusher 21 specifically for crushing non-metallic minerals. By adjusting the speed of the crusher 21, the content and proportion of medium-to-large particles can be well controlled.

[0054] The ultimate crushing fineness of the special crusher 21 is limited. Generally, the ultimate crushing fineness is difficult to be less than that of grinding equipment. In layman's terms, it can only be crushed to a certain fine particle size and cannot be deeply crushed. Under the same mineral conditions, grinding equipment can grind and crush to a fineness of 500-1000 mesh, but the ultimate crushing fineness of the crusher 21 is 200 mesh, with an average particle size between 50-100 mesh. The crushing particle size can be adjusted according to the rotation speed. This fineness is just right as the particle size required to adjust the content of medium and large particles in the slurry.

[0055] The sorting unit 40 includes an air classifier 41 located downstream of the crusher 21. By controlling the air intake and air intake pressure of the air classifier 41, medium and large particles are screened out, and unqualified oversized particles are removed and fed into the grinder 31a for grinding.

[0056] Specifically, the air classifier 41 includes an air inlet 41a and an air classifier chamber 41b. The air classifier 41 is connected to a compressed air pipeline 42 for providing sorting air. The compressed air pipeline 42 is connected to the air inlet 41a. Sorting air is introduced into the air classifier chamber 41b through the compressed air pipeline 42, and the powder mixture is sorted by gravity and buoyancy.

[0057] The air separator 41 is connected to a medium-to-large particle bin 60 and an ultra-large particle bin 70 via pipelines. A second belt weigher 12 is also installed downstream of the raw material bin 10. An elevator 80 is installed between the ultra-large particle bin 70 and the second belt weigher 12. The elevator 80 is used to lift ultra-large particles to the second belt weigher 12.

[0058] Specifically, medium and large particles with a particle size of less than 20 mesh are screened by wind and directly enter the medium and large particle silo. The unqualified ultra-large particles with a particle size of more than 20 mesh after screening enter the ultra-large particle silo 70. The ultra-large particles are sent to the second belt weigher 12 by the elevator 80 and enter the grinding mill 31a together with the non-metallic ore in the raw material silo 10.

[0059] The grinding mill 31a is located downstream of the second belt weigher 12, specifically in the form of a rod mill. It is used to add the crushed ultra-large particles and non-metallic ore from the raw material bin 10 to the grinding water and make a coarse raw material slurry with an ultra-fine particle ratio of ≥35% under the action of the grinding mill 31a. A coarse raw material slurry tank 33 is connected to the bottom of the grinding mill 31a through a pipeline. The coarse raw material slurry is stored in the coarse raw material slurry tank 33. The coarse raw material slurry flows by gravity into the coarse raw material slurry tank 33 for storage and buffering.

[0060] The coarse slurry tank 33 is connected to a coarse slurry pump 34 via a pipeline, and the coarse slurry pump 34 is connected to an ultrafine grinding mill 32a via a pipeline. The coarse raw material slurry is pumped to the ultrafine grinding mill 31a for ultrafine grinding to obtain an ultrafine raw material slurry with an ultrafine particle ratio of ≥50%. The ultrafine grinding mill 32a is connected to an ultrafine slurry tank 35 via a pipeline, and the ultrafine raw material slurry flows by gravity from the ultrafine grinding mill 31a to the ultrafine slurry tank 35.

[0061] An ultrafine slurry tank 35 is connected to an ultrafine slurry pump 36 via a pipeline, and the ultrafine slurry pump 36 is connected to a kneader 50 via a pipeline. Furthermore, a medium-to-large particle bin 60 is connected to the kneader 50 via a pipeline, and the kneader 50 is used to mix the ultrafine slurry and the medium-to-large particles.

[0062] Specifically, the ultrafine raw material slurry is pumped to the kneader 50, where it is mixed with the crushed and sorted medium and large particles and grinding water to produce a high-concentration, high-flowability product slurry.

[0063] The kneader 50 is connected to a product slurry tank 90 via a pipeline. The product slurry tank 90 is used to receive and store the mixed product slurry.

[0064] The slurry produced by the slurry production system in this application, by mixing ultrafine raw material slurry with crushed medium and large particles, fully fills the gaps between particles, resulting in a high-concentration slurry with good flowability, thereby improving the quality of the slurry, increasing the product throughput, and reducing energy consumption costs during transportation.

[0065] Meanwhile, the production process is simple, the process is short, it is easy to implement, and the operating conditions are mild, green and environmentally friendly, effectively reducing the production cost of slurry.

[0066] The slurry production system of this invention improves the fluidity and concentration of the slurry by changing the particle size distribution of the non-metallic slurry and increasing the proportion of medium-sized and ultrafine particles in the slurry during the slurry preparation process.

[0067] Increasing the content of medium and large particles with a particle size of 20-120 mesh can reduce the specific surface area, lower the viscosity of the slurry, increase the particle size difference, and improve the particle packing density.

[0068] Adding ultrafine slurry with a particle size of 200-600 mesh, of which more than 50% is ultrafine particles, can improve the lubricity of the slurry, while widening the particle size distribution and enhancing the filling efficiency between ultrafine and medium-to-large particles. When combined with medium-to-large particles, it can further increase the bulk density, thereby improving the fluidity and concentration of the slurry.

[0069] The specific preparation process includes raw material crushing and sorting, ultrafine grinding, and powder slurry mixing.

[0070] Raw material crushing: Non-metallic ores are stored in raw material silo 10, with a first belt weigher 11 and a second belt weigher 12 installed below. The first belt weigher 11 feeds non-metallic ores, which account for 60-70% of the total material of the slurry particles, into the crusher 21 for crushing, which crushes them into powder particles with a particle size of less than 20 mesh.

[0071] After crushing, the non-metallic ore particles are fed into an air separator 41, which includes an air inlet 41a and an air separation chamber 41b. The air separator uses gravity and buoyancy to separate the powder mixture by airflow, screening out fine particles with a diameter less than 20 mesh, which are then stored in a medium-to-large particle silo. After screening, ultra-large particles with a diameter greater than 20 mesh enter an ultra-large particle silo 70. These ultra-large particles are then conveyed by an elevator 80 to a second belt weigher 12, where they are fed together with the non-metallic ore in the raw material silo 10 into a grinding mill 31a.

[0072] Ultrafine grinding: The inlet of the grinding mill 31a is equipped with a second belt weigher 12, through which 30-40% of non-metallic ores are fed into the crusher 21 for crushing, that is, non-metallic ores with a non-crushable material ratio of 30-40% are fed into the crusher 21 for crushing.

[0073] Grinding water is simultaneously added to the crusher 21, and under the action of the grinding mill 31a, a coarse raw material slurry with an ultrafine particle ratio greater than 35% and a concentration of about 50% is produced. A coarse raw material slurry tank 33 is provided below the grinding mill 31a. The coarse raw material slurry flows by gravity into the coarse raw material slurry tank 33. The coarse raw material slurry in the coarse raw material slurry tank 33 is pumped to the ultrafine grinding mill 31a for ultrafine grinding to obtain an ultrafine raw material slurry with an ultrafine particle ratio greater than 70%. The ultrafine raw material slurry flows by gravity into the ultrafine raw material slurry tank 35.

[0074] Powder slurry mixing: The ultrafine raw material slurry obtained by ultrafine grinding is sent to the kneader 50 by the ultrafine slurry pump 36, and is fully mixed with the medium and large particles after crushing and screening in the kneader 50. During the mixing process, an equal proportion of grinding water is added to adjust the concentration of the product slurry, and finally a high-concentration, high-flowability product slurry is obtained.

[0075] Because medium and large particles are added to the ultrafine raw material slurry, the particle size difference is obvious, and the gaps between the particle sizes of the product slurry are effectively filled, resulting in a more reasonable particle size distribution, thereby improving the overall slurry concentration and fluidity.

[0076] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0077] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A slurry production system, characterized in that, include: A raw material silo, with a crushing unit and a grinding unit arranged in parallel downstream of the raw material silo, and a sorting unit arranged downstream of the crushing unit; The crushing unit is used to crush part of the ore in the raw material bin, and the sorting unit is used to sort the crushed powder. The grinding unit is used to grind the sorted ultra-large particles and the ore in the raw material bin, and to combine the ground ultra-fine slurry with the sorted medium and large particles and feed it into the kneader.

2. The slurry production system according to claim 1, characterized in that, The grinding unit includes a first grinding subunit and a second grinding subunit arranged in succession. The first grinding subunit includes a grinding machine, which is connected to a grinding water pipeline for preliminary grinding of ultra-large particles and mineral materials to obtain a coarse raw material slurry. The second grinding subunit includes an ultrafine grinding mill, which is used to grind coarse raw material slurry into ultrafine slurry.

3. The slurry production system according to claim 2, characterized in that, A first belt scale is installed downstream of the raw material silo. The crushing unit includes a crusher installed downstream of the first belt scale. The sorting unit includes an air classifier located downstream of the crusher. The air classifier is connected to a compressed air pipeline for providing sorting air.

4. The slurry production system according to claim 3, characterized in that, The air separator includes an air inlet and an air separation chamber, and the compressed air pipeline is connected to the air inlet.

5. The slurry production system according to claim 3, characterized in that, The air separator is connected to a medium-to-large particle bin and an ultra-large particle bin via pipelines. A second belt scale is also installed downstream of the raw material bin. An elevator is installed between the ultra-large particle bin and the second belt scale. The elevator is used to lift ultra-large particles to the second belt scale.

6. The slurry production system according to claim 5, characterized in that, The grinding mill is located downstream of the second belt conveyor.

7. The slurry production system according to claim 5, characterized in that, The grinding mill is connected to a coarse material slurry tank via a pipeline, the coarse material slurry tank is connected to a coarse material slurry pump via a pipeline, and the coarse material slurry pump is connected to the ultrafine grinding mill via a pipeline.

8. The slurry production system according to claim 7, characterized in that, The ultrafine mill is connected to an ultrafine slurry tank via a pipeline, the ultrafine slurry tank is connected to an ultrafine slurry pump via a pipeline, and the ultrafine slurry pump is connected to the kneader via a pipeline.

9. The slurry production system according to claim 8, characterized in that, The medium and large particle bin is connected to the kneader via a pipeline. The kneader is used to mix ultrafine slurry and medium and large particles.

10. The slurry production system according to claim 9, characterized in that, The kneader is connected to a product slurry tank via a pipeline, which is used to receive and store the mixed product slurry.

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