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Cooling Raymond mill and preparation method of powder for pressing graphite products

A Raymond mill and powder technology, which is used in lighting and heating equipment, grain processing, fixed tubular conduit components, etc. Non-uniformity, high energy consumption per ton of output, etc., to avoid poor cooling effect, improve grinding efficiency, and reduce wind speed

Active Publication Date: 2012-02-08
洛阳宜墨新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the non-circulation of the air inlet and outlet, the cold air takes away a lot of heat generated during crushing, and the temperature inside the equipment and the material is low. Although it can meet the technical requirements for crushing some low-melting point materials, the production efficiency is extremely low and the energy consumption is large. 650 Type pulverizer (Zhengzhou Mining Machinery Group Co., Ltd.) as an example, if it produces 200-mesh secondary powder, the output is only 300kg / h, and the output of 320-mesh secondary powder is even lower. The particle size is uneven (the content of fine powder larger than the screen mesh size exceeds the process requirements), and it is difficult to meet the process requirements for the production of high-strength, high-density, high-strength graphite products

Method used

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  • Cooling Raymond mill and preparation method of powder for pressing graphite products
  • Cooling Raymond mill and preparation method of powder for pressing graphite products
  • Cooling Raymond mill and preparation method of powder for pressing graphite products

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A kind of cooling Raymond mill of embodiment 1, see figure 1 , figure 2 , image 3 , comprising a host computer 3, an analyzer 8, a cyclone collector 12, and a blower fan 19, each part is connected by air ducts 10 and 13 in turn to form a circulating air path, and the return air pipeline 13 between the cyclone collector 12 and the blower fan 19 A cooling device 21 for cooling the circulating air flow is also installed in the middle, and the cooling device 21 includes sixty-two heat exchange branch pipes 30, a cooling chamber 32, a spiral deflector 31, an air inlet chamber 29, an air outlet chamber 33, a housing 35. Sixty-two heat exchange branch pipes are vertically and evenly arranged on the multi-layer concentric circle in the cooling chamber 22, and their upper and lower ports are respectively connected to the air inlet chamber 29 and the air outlet chamber 33. The heat exchange branch pipes 30 The specifications are Φ55mm, 2mm thick, and 1m long thin-walled coppe...

Embodiment 2

[0044] Embodiment 2 A cooling Raymond mill, which is basically the same as Embodiment 1, the difference is that: no cooling jacket is provided outside the shell of the main grinding roller chamber of the main engine; the heat exchange branch pipe is a thin-walled aluminum pipe; all heat exchange branch pipes The sum of the cross-sectional areas is 3 times of the cross-sectional area of ​​the air duct between the cyclone collector 9 and the blower fan 16.

[0045] Utilize above-mentioned cooling Raymond mill to prepare the method for the used powder of pressed graphite product:

[0046] (1) Pitch coke is selected for primary grinding, and ground into a powder with a particle size of 280 mesh;

[0047] (2) Kneading and sheeting Add asphalt with a softening point of 70-90°C according to 29-31% of the weight of the powder obtained in the previous step, knead and stir at 160-170°C for 50-60 minutes to form a paste, roll Make it into flakes, and after drying and cooling, break into...

Embodiment 3

[0049] Embodiment 3 A cooling Raymond mill, which is basically the same as Embodiment 1, the difference is that no spiral deflector is provided in the cooling cavity; 2 times the cross-sectional area of ​​the air duct between 16.

[0050] Utilize above-mentioned cooling Raymond mill to prepare the method for the used powder of pressed graphite product:

[0051] (1) Primary milling: select pitch coke, grind it into a powder with a particle size of 250 mesh, and add flake graphite according to 5-8%;

[0052] (2) Kneading and sheeting Add asphalt according to 30-32% of the weight of the powder obtained in the previous step, knead and stir at 160-170°C for 55-60 minutes, form a paste, roll it into a sheet, and dry it After cooling, it is broken into fragments with a particle size of ≤15mm, and it is set aside;

[0053] (3) Grinding powder for pressing The fragments obtained in the previous step are sent into the above-mentioned cooling Raymond mill through the vibrating feeder e...

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Abstract

The invention relates to a cooling Raymond mill and a preparation method of powder for pressing graphite products. The cooling Raymond mill comprises a main machine, an analyzer, a cyclone collector and a fan; a circulating air flow cooling device is arranged in a return air pipe between the cyclone collector and the fan; the device comprises heat exchange branch pipes, a cooling cavity, an air inlet cavity, an air outlet cavity and a shell; the heat exchange branch pipes are vertically distributed in the cooling cavity; the upper and lower openings of the heat exchange branch pipes are communicated with the air inlet cavity and the air outlet cavity respectively; the air inlet cavity is communicated with the cyclone collector by an air duct; the air outlet cavity is communicated with thefan through an air duct; the sum of the sectional areas of the heat exchange branch pipes is more than or equal to the sectional area of the air duct between the cyclone collector and the fan; and the upper part of the shell is provided with a cold medium outlet communicated with the cooling cavity, and the lower part of the shell is provided with a cold medium inlet communicated with the coolingcavity. The cooling Raymond mill has an obvious cooling effect and obviously improved milling efficiency and is suitable for crushing materials with a melting point below 70 DEG C, and the quality ofthe powder prepared by the cooling Raymond mill is improved obviously.

Description

technical field [0001] The invention relates to the field of powder making, in particular to a Raymond mill equipped with a circulating air cooling device and a method for preparing powder used for pressing graphite products. Background technique [0002] Raymond Mill, also known as rotary roller (swing roller) disc mill, is mainly used for grinding non-metallic ore and other materials. Raymond mill has stable performance, strong adaptability and high cost performance. The working principle of Raymond mill (see figure 1 ): When working, put the fragments that need to be crushed into the grinding roller chamber (4) from the feed port (6) on the side of the machine casing, and rely on the grinding roller (5) device suspended on the plum blossom frame of the main machine, around the main shaft (1 ) axis revolves and rotates itself at the same time, due to the centrifugal force during rotation, the grinding roller (5) swings outwards and presses against the grinding ring, so t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C15/00B02C23/18F28D7/10
Inventor 张全利赵稳成韩新威吴保军王光林李红涛张利明
Owner 洛阳宜墨新材料有限公司
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