Kaolin preparation method

Abstract

The invention discloses a kaolin preparation method, and relates to the technical field of non-metal ore processing, and the method comprises the following steps: S1, grinding into powder: grinding a taken kaolin raw material into kaolin raw material powder; s2, pulping and impurity removal: putting the kaolin raw material powder and water into a pulping device, and mixing the kaolin raw material powder into mixed pulp by the pulping device; s3, drying into powder: drying the mixed slurry, and then grinding to obtain kaolin; the kaolin is simply manufactured through the three steps of grinding into powder, pulping and impurity removing and drying into powder, the steps are few, the manufacturing cost is low, and the requirement for kaolin with low requirements can be met; impurities are reserved between the filter cover and the bottom of the shell to be mixed back and forth and connected with the filter cover, so that kaolin raw materials on the impurities fall into water, and the utilization rate of the raw materials is increased.

Description

Technical Field

[0001] The invention relates to the technical field of non-metallic mineral processing, in particular to a method for preparing kaolin. Background Art

[0002] Kaolin is a non-metallic mineral, a clay and clay rock mainly composed of kaolinite clay minerals. Because it is white and fine, it is also called dolomite. It is named after Gaoling Village in Jingdezhen, Jiangxi Province; its pure kaolin is white, fine, soft soil-like, and has good physical and chemical properties such as plasticity and refractoriness. Its mineral composition is mainly composed of kaolinite, halloysite, hydromica, illite, montmorillonite, quartz, feldspar and other minerals. Kaolin has a wide range of uses, mainly in papermaking, ceramics and refractory materials, and secondly in coatings, rubber fillers, enamel glazes and white cement raw materials.

[0003] In the process of kaolin preparation, if there are too many operation steps, the cost of use will increase. Some kaolins do not have such high requirements for the extracted components. When the kaolin raw materials are mixed with water, they are first mixed into a slurry and then filtered. Some impurities are mixed with kaolin and can be easily filtered out directly, reducing the utilization rate of the raw materials. Summary of the invention

[0004] The object of the present invention is to provide a method for preparing kaolin to solve the problem in the above background technology that if there are too many operation steps in the process of preparing kaolin, the use cost will increase, and some kaolins do not have such high requirements for the extracted components.

[0005] In order to solve the above technical problems, the present invention provides the following technical solution: a method for preparing kaolin, comprising the following steps: S1, grinding into powder: grinding the removed kaolin raw material into kaolin raw material powder; S2, slurrying and impurity removal: putting kaolin raw material powder and water into a slurrying device, and the slurrying device mixes the kaolin raw material powder into a mixed slurry; S3, drying into powder: drying the mixed slurry, and then grinding it to obtain kaolin.

[0006] Furthermore, in step S2, the mixed slurry is filtered to remove impurities through a magnetic separator.

[0007] Furthermore, in step S3, calcination is performed before grinding.

[0008] Furthermore, the slurry-forming device includes an outer shell, a feed pipe extending to the interior of the outer shell is vertically fixed to the middle of the top of the outer shell, an annular cover is provided on the outer side of the lower part of the feed pipe, a filter cover is connected between the outer side of the annular cover and the bottom end of the inner shell, a driving member is vertically connected to the middle of the bottom end of the outer shell, a rotating shaft extending to the interior of the outer shell is connected to the output end of the driving member, a connecting frame passing through the annular cover and located on the outer side of the feed pipe is vertically connected to the top of the rotating shaft, a stirring rod I for stirring is provided on the outer side of the upper part of the connecting frame, a spiral blade for guiding the mixed slurry upward is provided on the outer side of the middle part of the connecting frame, slurry outlets are provided on both sides of the bottom of the outer shell at a position above the bottom end of the filter cover, and a material inlet is connected to the top of the outer shell.

[0009] Furthermore, the connecting frame is rotatably connected to the annular cover, a sealing ring is provided at the connection between the connecting frame and the annular cover, and a feeding funnel is connected to the top of the feeding pipe, and the feeding funnel is located outside the shell.

[0010] Furthermore, a stirring rod II for stirring is vertically connected to the outside of the rotating shaft and located inside the filter cover, and a debris outlet with a sealing cover is provided at the bottom end of the filter cover inside the shell.

[0011] Furthermore, a support rod for supporting the connecting frame is vertically connected to the outer side of the top of the connecting frame, and a cleaning piece for cleaning the filter cover is fixed to the outer side of the lower part of the connecting frame.

[0012] Furthermore, the cleaning member includes a rotating rod fixed to the outer side of the lower part of the connecting frame and in contact with the filter cover, and a brush is connected to the bottom end of the rotating rod.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: kaolin is simply manufactured through the three steps of grinding into powder, slurrying to remove impurities and drying into powder, with fewer steps and low manufacturing cost, and can meet the requirements of kaolin with low requirements; by leaving impurities between the filter cover and the bottom of the outer shell and mixing them back and forth with the filter cover, the kaolin raw materials on the impurities fall off and enter the water, thereby increasing the utilization rate of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a kaolin preparation method of the patent of the present invention.

[0015] Figure 2 It is a structural schematic diagram of a slurry-forming device for a kaolin preparation method according to the patent of the present invention.

[0016] Markings in the accompanying drawings: 1. Pulping device; 101. Housing; 102. Feed pipe; 103. Feed hopper; 104. Ring cover; 105. Filter cover; 106. Driving member; 107. Rotating shaft; 108. Connecting frame; 109. Support rod; 1010. Stirring rod I; 1011. Spiral blade; 1012. Cleaning member; 1013. Stirring rod II; 1014. Discharge port; 1015. Ingredient inlet; 1016. Pulping port. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 and Figure 2 The present invention provides a technical solution: a method for preparing kaolin, comprising the following steps: S1, grinding into powder: grinding the removed kaolin raw material into kaolin raw material powder; S2, slurrying and impurity removal: putting kaolin raw material powder and water into slurrying device 1, and slurrying device 1 mixes kaolin raw material powder into mixed slurry; S3, drying into powder: drying the mixed slurry, and then grinding it to obtain kaolin.

[0019] In step S2, the mixed slurry is passed through a magnetic separator to filter out impurities, so as to facilitate the filtration of impurities.

[0020] Wherein, in step S3, calcination is performed before grinding.

[0021] See also Figure 1 and Figure 2The pulping device 1 includes a shell 101, a feed pipe 102 extending into the shell 101 is vertically fixed in the middle of the top of the shell 101, an annular cover 104 is provided on the outer side of the lower part of the feed pipe 102, a filter cover 105 is connected between the outer side of the annular cover 104 and the bottom of the shell 101, and the filter cover 105 is in a truncated cone shape. A driving member 106 is vertically connected to the middle of the bottom end of the shell 101. The driving member 106 adopts a bidirectional rotating motor and is selected according to specific usage conditions. A sealing member, such as a sealing bearing, is added to the connection between the driving member 106 and the middle of the bottom end of the shell 101. The output end of the driving member 106 is connected to the output end of the driving member 106. A rotating shaft 107 extending to the interior of the outer shell 101 is connected, and a connecting frame 108 that passes through the annular cover 104 and is located on the outside of the feed pipe 102 is vertically connected to the top of the rotating shaft 107. A stirring rod Ⅰ1010 for stirring is provided on the outer side of the upper part of the connecting frame 108, and a spiral blade 1011 for guiding the mixed slurry upward is provided on the outer side of the middle part of the connecting frame 108. Slurry outlets 1016 are provided on both sides of the bottom of the outer shell 101 at a position above the bottom end of the filter cover 105. The outer side of the slurry outlet 1016 is connected to a pipeline through a valve, and the pipeline is connected to subsequent equipment. The top of the outer shell 101 is connected to an ingredient inlet 1015.

[0022] When in use, the kaolin raw material powder enters the filter cover 105 from the feed pipe 102, and water enters the shell 101 from the ingredient inlet 1015; at the same time, the driving member 106 rotates, and the rotation of the driving member 106 drives the rotating shaft 107 to rotate, and the rotation of the rotating shaft 107 drives the connecting frame 108 to rotate, and the rotation of the connecting frame 108 simultaneously drives the stirring rod Ⅰ1010 and the spiral blade 1011 to rotate, and the rotation of the spiral blade 1011 guides the kaolin raw material powder and water located inside the filter cover 105 upward, and during the guidance, not only can the kaolin raw material powder and water be mixed, but also the impurities in the kaolin raw material powder can be retained in the filter cover 105 through the filter cover 105. By filtering in this way with impurities retained below, the kaolin raw material powder contained on the impurities can be continuously mixed, thereby improving the utilization rate of the raw materials and the efficiency of mixing into slurry.

[0023] See also Figure 2 The connecting frame 108 is rotatably connected to the annular cover 104. A sealing ring is provided at the connection between the connecting frame 108 and the annular cover 104 to increase the sealing performance. A feeding funnel 103 is connected to the top of the feeding pipe 102. The feeding funnel 103 is located outside the outer shell 101. The use of the feeding funnel 103 facilitates the feeding of the feeding pipe 102.

[0024] See also Figure 1 and Figure 2 The outer side of the rotating shaft 107 is located inside the filter cover 105 and is vertically connected to a stirring rod II 1013 for stirring. The bottom end of the inner side of the shell 101 is located at the bottom end of the filter cover 105 and is provided with a discharge port 1014 with a sealing cover.

[0025] When in use, the rotation of the rotating shaft 107 drives the stirring rod II 1013 to rotate inside the filter cover 105, stirring the kaolin raw material powder and water inside and stirring the impurities remaining inside again, so as to facilitate the guidance of the spiral blade 1011.

[0026] See also Figure 2 A support rod 109 for supporting the connecting frame 108 is vertically connected to the outer side of the top of the connecting frame 108. It is recommended to add a pulley at the end of the support rod 109 to reduce the contact friction between the supporting connecting frame 108 and the outer shell 101. A cleaning piece 1012 for cleaning the filter cover 105 is fixed to the outer side of the lower part of the connecting frame 108 to clean impurities attached to the bottom surface of the filter cover 105.

[0027] When in use, when the connecting frame 108 rotates, it drives the support rod 109 on the top of the connecting frame 108 to contact the outer shell 101 for support. The rotation support of the support rod 109 can prevent the top of the connecting frame 108 from being unlimited. After a long time of use, it is easy to cause the top of the connecting frame 108 to shake and affect the balance; the rotation of the connecting frame 108 also drives the cleaning piece 1012 to rotate on the filter cover 105. When the cleaning piece 1012 rotates, it scrapes impurities on the bottom surface of the filter cover 105 into the inside of the filter cover 105.

[0028] See also Figure 2 The cleaning member 1012 includes a rotating rod fixed to the outer side of the lower portion of the connecting frame 108 and in contact with the filter cover 105, and a brush is connected to the bottom end of the rotating rod.

[0029] When in use, when the cleaning piece 1012 rotates outside the filter cover 105, it is the rotating rod that rotates. When the rotating rod rotates, it drives the brush to clean the filter holes on the filter cover 105, so that the impurities blocking the bottom of the filter holes on the filter cover 105 are cleaned into the filter cover 105.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing kaolin, characterized in that: The steps include: S1, grinding into powder: grinding the removed kaolin raw material into kaolin raw material powder; S2, slurrying and impurity removal: putting kaolin raw material powder and water into a slurrying device (1), and the slurrying device (1) mixes the kaolin raw material powder into a mixed slurry; S3, drying into powder: drying the mixed slurry, and then grinding to obtain kaolin; The pulping device (1) comprises a housing (101), a feed pipe (102) extending into the interior of the housing (101) being vertically fixed to the middle of the top end of the housing (101), an annular cover (104) being provided on the outer side of the lower part of the feed pipe (102), a filter cover (105) being connected between the outer side of the annular cover (104) and the bottom end of the housing (101), a driving member (106) being vertically connected to the middle of the bottom end of the housing (101), and a rotating shaft (107) extending into the interior of the housing (101) being connected to the output end of the driving member (106). The top end of the rotating shaft (107) is vertically connected to a connecting frame (108) that passes through the annular cover (104) and is located outside the feed pipe (102); a stirring rod I (1010) for stirring is provided on the outer side of the upper part of the connecting frame (108); a spiral blade (1011) for guiding the mixed slurry upward is provided on the outer side of the middle part of the connecting frame (108); slurry outlets (1016) are provided on both sides of the bottom of the outer shell (101) at a position above the bottom end of the filter cover (105); and a batching inlet (1015) is connected to the top end of the outer shell (101).

2. The method for preparing kaolin according to claim 1, characterized in that: In the step S2, the mixed slurry is filtered to remove impurities through a magnetic separator.

3. The method for preparing kaolin according to claim 1, characterized in that: In the step S3, calcination is performed before grinding.

4. The method for preparing kaolin according to claim 1, characterized in that: The connecting frame (108) is rotatably connected to the annular cover (104); a sealing ring is provided at the connection between the connecting frame (108) and the annular cover (104); the top of the feed pipe (102) is connected to a feed hopper (103); and the feed hopper (103) is located outside the outer shell (101).

5. The method for preparing kaolin according to claim 1, characterized in that: The outer side of the rotating shaft (107) is located inside the filter cover (105) and is vertically connected to a stirring rod II (1013) for stirring. The bottom end of the inner side of the housing (101) is located at the bottom end of the filter cover (105) and is provided with a discharge port (1014) with a sealing cover.

6. The method for preparing kaolin according to claim 1, characterized in that: A support rod (109) for supporting the connecting frame (108) is vertically connected to the outer side of the top of the connecting frame (108), and a cleaning piece (1012) for cleaning the filter cover (105) is fixed to the outer side of the lower part of the connecting frame (108).

7. The method for preparing kaolin according to claim 6, characterized in that: The cleaning member (1012) comprises a rotating rod fixed to the outer side of the lower part of the connecting frame (108) and in contact with the filter cover (105), and a brush is connected to the bottom end of the rotating rod.

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