High-grade matte nickel fine grinding pulping system and use method

Abstract

The invention relates to the technical field of high nickel matte pulping, and particularly discloses a high nickel matte fine grinding pulping system which comprises a horizontal ball mill, a spiral classifier and a stirring fine grinding machine. The stirring fine grinding machine is used for finely grinding ore pulp; the spiral classifier is mounted on one side of the horizontal ball mill, a discharge port of the horizontal ball mill is communicated with a feed port of the spiral classifier through a connecting pipe, and a return port of the spiral classifier is communicated with the feed port of the horizontal ball mill; according to the high matte nickel fine grinding system, the high matte nickel fine grinding system can be suitable for 3-15 mm coarse alloy particles with extremely good toughness and ductility, and efficient and energy-saving crushing and grinding can be conducted on the materials; the problem that an ore discharge port and a pipeline are blocked due to the fact that alloy is not easy to levigate in a common pulping process is solved, and operation is smooth and stable in the production process.

Description

Technical Field

[0001] The invention relates to the technical field of high-grade nickel matte pulping, and in particular to a high-grade nickel matte fine grinding pulping system. Background Art

[0002] High-grade nickel matte among nickel intermediates is the most economical raw material for producing nickel sulfate. However, due to the influence of raw material composition and smelting process, the nickel content in nickel sulfur varies greatly and the degree of blowing sulfidation is inconsistent. The content of nickel-iron alloy varies greatly, making it difficult to economically and efficiently prepare ultrafine high-concentration slurry to produce battery-grade nickel sulfate.

[0003] There are several difficult technical problems in this process. ① The raw materials contain high levels of nickel, cobalt and iron, especially 3-15mm alloy particles, which have excellent toughness and ductility and are difficult to crush. ② The particle fineness in the slurry is required to meet -280 mesh ≥ 90%, ensuring the leaching speed and leaching completion rate in nickel hydrometallurgy. ③ In the subsequent wet nickel extraction, the slurry concentration, particle size and volume stability are strictly required, generally at 50% ± 2%, which is difficult to achieve with general wet ultrafine pulping processes and equipment; ④ The alloy materials in the high-nickel materials are easily crushed into thin flakes during the crushing process, blocking the discharge port and pipeline, and hindering the smoothness of production.

[0004] In view of the above-mentioned technical problems, there is an urgent need for a high-grade nickel matte fine grinding pulping system and method specifically for the production of high-grade nickel matte slurry in nickel intermediates. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a high-grade nickel matte fine grinding pulping system.

[0006] The high-grade nickel matte fine grinding pulping system of the present invention comprises a horizontal ball mill, a spiral classifier and a stirring fine mill, wherein the horizontal ball mill is used for coarse grinding of ore pulp; the stirring fine mill is used for fine grinding of ore pulp; the spiral classifier is installed on one side of the horizontal ball mill, and the discharge port of the horizontal ball mill is connected with the feed port of the spiral classifier through a connecting pipe, and the return port of the spiral classifier is connected with the feed port of the horizontal ball mill;

[0007] The discharge port of the spiral classifier is connected to a storage mechanism, and the storage mechanism is connected to the feed port at the bottom of the stirring fine mill through a conduit;

[0008] The storage mechanism includes a first storage container and a second storage container. The first storage container is used to store the ore pulp discharged from the spiral classifier and to adjust the ore pulp level in the spiral classifier to ensure the stability of the ore pulp level in the grinding system and maintain stable feeding of the stirring fine mill.

[0009] The stirring fine grinder comprises a stirring container, the interior of which is formed by a grading ring baffle into a grinding zone at the lower end and a settling zone at the upper end;

[0010] A stirrer is installed in the center of the stirring fine grinder; a classifying wheel is arranged on the stirrer, the classifying wheel is located below the classifying ring baffle, and the diameter of the classifying wheel is larger than the inner hole diameter of the classifying ring baffle.

[0011] The stirring fine mill uses 10-30mm low-chromium or medium-chromium steel balls as the medium, and mixes them in appropriate proportions to provide sufficient energy density to ensure that the discharge particle size of the stirring fine mill is -280 mesh ≥90%;

[0012] The stirring fine grinder is designed with a frequency conversion control device, with an operating frequency of 30-50Hz and a stirrer edge linear speed of 4-5m / s, which can meet the crushing force requirements for materials below 1mm.

[0013] The second storage container is communicated with the first storage container, and the height difference between the discharge port of the second storage container and the stirring fine grinder is greater than 4m.

[0014] The grading wheel is provided with a gap of 3mm-10mm.

[0015] The horizontal ball mill has the function of automatically adjusting the water volume, ensuring that the mass concentration of the slurry in the cylinder is stable in the range of 40% to 50%, and the discharge particle size is stable below -1mm, ensuring that the high-grade nickel matte slurry has good fluidity.

[0016] The horizontal ball mill equipment is provided with 60mm-120mm low-chromium or medium-chromium steel ball media, which are mixed in appropriate proportions.

[0017] A method for using a high-grade nickel matte fine grinding pulping system

[0018] S1. Input 1mm-15mm coarse grain high nickel matte raw material into the horizontal ball mill;

[0019] S2, after the coarse particle raw material is ground by the horizontal ball mill, the material is discharged into the spiral classifier for classification, the slurry with a particle size of less than 1 mm overflows from the spiral classifier to the first storage container, and the slurry with a particle size of more than 1 mm is driven by the spiral blade of the spiral classifier and returns to the horizontal ball mill through the return port for grinding again;

[0020] S3, the slurry in the first storage container is transported to the second storage container, and the slurry in the second storage container flows by gravity from the feed port at the bottom of the stirring fine mill into the grinding area of ​​the stirring fine mill;

[0021] S4. The ore pulp in the grinding area of ​​the stirring fine mill is further broken by the rotation of the agitator and the steel ball medium, and is discharged from the sedimentation port in the sedimentation area under the screening of the classifying wheel and the classifying ring baffle.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In the present invention, the high nickel matte fine grinding system can be used for 3-15mm coarse alloy particles with excellent toughness and ductility, and can grind the material efficiently and energy-savingly; it solves the problem of the difficulty in grinding the alloy in the general pulping process, which leads to blockage of the discharge port and the pipeline, and the production process runs smoothly and stably.

[0024] 2. In the present invention, the slurry concentration, particle size and volume of the high-nickel matte fine grinding system are very stable with small fluctuations, which solves the problem of large volatility in general wet ultrafine pulping; in the present invention, the particle fineness of the high-nickel matte discharge slurry is -280 mesh ≥90%, which solves the problem of ultrafine particles in the high-nickel matte slurry and effectively ensures the leaching rate and leaching completion rate of nickel in the nickel wet smelting system.

[0025] 3. In the present invention, the stirring fine mill is easy to operate, occupies a small area, has few vulnerable parts, is easy to maintain, and has a grinding efficiency that is about 30% higher than that of a horizontal ball mill, saving about 30% to 50% of energy consumption. In the present invention, the comprehensive energy consumption of the high-matte nickel fine grinding system is about 30% to 50% lower than that of the general wet ultrafine pulping system, solving the problem of high energy consumption in the ultrafine grinding process of high-matte nickel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the stirring fine grinding machine of the present invention.

[0029] In the figure: 1, horizontal ball mill; 2, spiral classifier; 3, stirring fine mill; 31, grinding area; 32, sedimentation area; 33, stirrer; 34, classifying wheel; 35, classifying ring baffle; 36, stirring container;

[0030] 4. A first storage container; 5. A second storage container. DETAILED DESCRIPTION

[0031] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0032] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] See also Figure 1 - Figure 2 The high-grade nickel matte fine grinding pulping system of the present invention comprises a horizontal ball mill 1, a spiral classifier 2 and a stirring fine mill 3, wherein the horizontal ball mill 1 is used for coarse grinding of ore pulp; the stirring fine mill 3 is used for fine grinding of ore pulp; the spiral classifier 2 is installed on one side of the horizontal ball mill 1, and the discharge port of the horizontal ball mill 1 is connected with the feed port of the spiral classifier 2 through a connecting pipe, and the return port of the spiral classifier 2 is connected with the feed port of the horizontal ball mill 1;

[0034] The discharge port of the spiral classifier 2 is connected to a storage mechanism, and the storage mechanism is connected to the feed port at the bottom of the stirring fine grinder 3 through a conduit;

[0035] The storage mechanism includes a first storage container 4 and a second storage container 5. The first storage container 4 is used to store the slurry discharged from the spiral classifier 2 and to adjust the slurry level in the spiral classifier 2 to ensure the stability of the slurry level in the grinding system and maintain stable feeding of the stirring fine mill 3.

[0036] The stirring fine grinding mill 3 comprises a stirring container 36, wherein the stirring container 36 has a grinding zone 31 at the lower end and a settling zone 32 at the upper end formed by a grading ring baffle 35 inside the stirring container;

[0037] A stirrer 33 is installed in the center of the stirring fine grinder 3; a classifying wheel 34 is provided on the stirrer 33, and the classifying wheel 34 is located below the classifying ring baffle 35, and the diameter of the classifying wheel 34 is larger than the inner hole diameter of the classifying ring baffle 35, and a gap of 3mm-10mm is provided on the classifying wheel 34.

[0038] Specifically, the stirring mill 3 uses 10mm-30mm low-chromium or medium-chromium steel ball media, and is proportioned in an appropriate ratio to provide sufficient energy density to ensure that the discharge particle size of the stirring mill 3 is -280 mesh ≥90%;

[0039] The stirring fine grinding mill 3 is designed with a frequency conversion control device, the operating frequency is 30-50Hz, and the edge linear speed of the stirrer 33 is 4-5m / s, which meets the crushing force requirements for materials below 1mm.

[0040] The second storage container 5 is connected to the first storage container 4, and the height difference between the discharge port of the second storage container 5 and the stirring fine grinder 3 is greater than 4m, so that the slurry in the second storage container is transported into the stirring fine grinder 3 by its own weight to avoid slurry backflow.

[0041] The ball mill has the function of automatically adjusting the water volume to ensure that the slurry mass concentration in the cylinder is stable at 40% to 50%, and the discharge particle size is stable at below -1mm, ensuring that the high-grade nickel matte slurry has good fluidity.

[0042] The ball mill is equipped with 60mm-120mm low-chromium or medium-chromium steel balls as media, and is mixed in appropriate proportions.

[0043] A method for using a high nickel matte fine grinding pulping system:

[0044] S1, inputting 1mm-15mm coarse particle high nickel matte raw material into horizontal ball mill 1;

[0045] S2, after the coarse particle raw material is ground by the horizontal ball mill 1, the material is discharged into the spiral classifier 2 for classification, the slurry with a particle size below 1 mm overflows from the spiral classifier 2 to the first storage container 4, and the slurry with a particle size above 1 mm is driven by the spiral blades of the spiral classifier 2 and returns to the horizontal ball mill 1 through the return port for grinding again;

[0046] S3, the slurry in the first storage container 4 is transported to the second storage container 5, and the slurry in the second storage container 5 flows by gravity from the feed port at the bottom of the stirring fine mill 3 into the grinding area 31 in the stirring fine mill 3;

[0047] S4, the ore pulp in the grinding zone 31 of the stirring fine mill 3 is further broken by the rotation of the stirrer 33 and the steel ball medium, and is discharged from the sedimentation port in the sedimentation zone 32 under the screening of the classifying wheel 34 and the classifying ring baffle 35.

[0048] The above is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A high-grade nickel matte fine grinding and pulping system, comprising a horizontal ball mill (1), a spiral classifier (2) and a stirring fine grinding mill (3), characterized in that: The horizontal ball mill (1) is used for coarse grinding of ore pulp; the stirring fine mill (3) is used for fine grinding of ore pulp; the spiral classifier (2) is installed on one side of the horizontal ball mill (1), and the discharge port of the horizontal ball mill (1) is connected to the feed port of the spiral classifier (2) through a connecting pipe, and the return port of the spiral classifier (2) is connected to the feed port of the horizontal ball mill (1); the discharge port of the spiral classifier (2) is connected to a storage mechanism, and the storage mechanism is connected to the feed port at the bottom of the stirring fine mill (3) through a conduit; The storage mechanism comprises a first storage container (4) and a second storage container (5); the first storage container (4) is used to store the ore pulp discharged from the spiral classifier (2) and to adjust the ore pulp level in the spiral classifier (2), thereby ensuring the stability of the ore pulp level in the grinding system and maintaining the stable feeding of the stirring fine mill (3).

2. A high-grade nickel matte fine grinding and pulping system according to claim 1, characterized in that: The stirring fine grinder (3) comprises a stirring container (36), wherein the interior of the stirring container (36) is formed by a grading ring baffle (35) into a grinding zone (31) at the lower end and a settling zone (32) at the upper end; A stirrer (33) is installed in the center of the stirring fine grinder (3); a classifying wheel (34) is provided on the stirrer (33); the classifying wheel (34) is located below the classifying ring baffle (35), and the diameter of the classifying wheel (34) is larger than the inner hole diameter of the classifying ring baffle (35).

3. The high-grade nickel matte fine grinding and pulping system according to claim 1 is characterized in that: The stirring fine mill (3) uses 10-30mm low-chromium or medium-chromium steel balls as the medium, and mixes them in appropriate proportions to provide sufficient energy density to ensure that the discharge particle size of the stirring fine mill (3) is -280 mesh ≥90%; The stirring fine grinding machine (3) is designed with a frequency conversion control device, with an operating frequency of 30-50 Hz, and the edge linear speed of the stirrer (33) is 4-5 m / s, which meets the crushing force requirements for materials below 1 mm.

4. A high-grade nickel matte fine grinding and pulping system according to claim 1, characterized in that: The second storage container (5) is connected to the first storage container (4), and the height difference between the discharge port of the second storage container (5) and the stirring fine grinder (3) is greater than 4m.

5. The high-grade nickel matte fine grinding and pulping system according to claim 1, characterized in that: The grading wheel (34) is provided with a gap of 3 mm to 10 mm.

6. The high-grade nickel matte fine grinding and pulping system according to claim 1, characterized in that: The horizontal ball mill (1) has an automatic water volume adjustment function to ensure that the mass concentration of the slurry in the cylinder is stable in the range of 40% to 50%, and the discharge particle size is stable below -1mm, ensuring that the high-grade nickel matte slurry has good fluidity.

7. The high-grade nickel matte fine grinding and pulping system according to claim 1 is characterized in that: The horizontal ball mill (1) is provided with 60 mm to 120 mm low-chromium or medium-chromium steel balls as media, which are proportioned in an appropriate ratio.

8. A method for using a high-grade nickel matte fine grinding pulping system, characterized in that: S1, inputting 1mm-15mm coarse particle high nickel matte raw material into the horizontal ball mill (1); S2, after the coarse particle raw material is ground by the horizontal ball mill (1), the material is discharged into the spiral classifier (2) for classification, the slurry with a particle size of less than 1 mm overflows from the spiral classifier (2) to the first storage container (4), and the slurry with a particle size of more than 1 mm is driven by the agitator (33) in the spiral classifier (2) to return to the horizontal ball mill (1) through the return port for further grinding; S3, the ore pulp in the first storage container (4) is transported to the second storage container (5), and the ore pulp in the second storage container (5) flows by gravity from the feed port at the bottom of the stirring fine mill (3) into the grinding area (31) in the stirring fine mill (3); S4. The ore pulp in the grinding zone (31) of the stirring fine mill (3) is further crushed by the rotation of the stirrer (33) and the steel ball medium. The ore pulp is discharged from the settling port in the settling zone (32) under the screening of the classifying wheel (34) and the classifying ring baffle (35).

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