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Grading device and grading method for ultra-fine powder

A technology of ultra-fine powder and classification device, which is applied in the direction of solid separation, etc. It can solve the problems of unfavorable classification, easy agglomeration, and inability to realize continuous operation, and achieve the effects of high classification efficiency, guaranteed quality stability, and simple operation

Inactive Publication Date: 2015-04-01
JIANGSU BOQIAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing grading methods cannot realize continuous operation, and before grading the ultrafine powder, the ultrafine powder synthesized by the chemical reduction method needs to undergo subsequent processing such as drying, which is prone to agglomeration, which is not conducive to grading

Method used

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  • Grading device and grading method for ultra-fine powder
  • Grading device and grading method for ultra-fine powder
  • Grading device and grading method for ultra-fine powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 (batch one)

[0027] (1) Start the motor, the stirring shaft starts to rotate, and add 50kg of ultra-fine nickel powder slurry into the stirring tank for stirring;

[0028] (2) Start the high-speed centrifuge, and after the speed of the high-speed centrifuge reaches 15,000 rpm, start the metering pump to start feeding;

[0029] (3) The ultra-fine nickel powder slurry enters the high-speed centrifuge for classification through the metering pump, and the overflow enters the collection kettle from the outlet of the high-speed centrifuge, and 36.48kg of nickel powder is collected;

[0030] (4) After the classification, clean up the powder on the drum of the high-speed centrifuge and collect it. The nickel powder collected on the drum is 13.47kg.

Embodiment 2

[0031] Example 2 (batch two)

[0032] (1) Start the motor, the stirring shaft starts to rotate, and add 50kg of ultra-fine nickel powder slurry into the stirring tank for stirring;

[0033] (2) Start the high-speed centrifuge, and after the speed of the high-speed centrifuge reaches 15,000 rpm, start the metering pump to start feeding;

[0034] (3) The ultra-fine nickel powder slurry enters the high-speed centrifuge for classification through the metering pump, and the overflow enters the collection kettle from the outlet of the high-speed centrifuge, and 37.25kg of nickel powder is collected;

[0035] (4) After the classification, clean up the powder on the drum of the high-speed centrifuge and collect it. The nickel powder collected on the drum is 12.69kg.

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Abstract

The invention relates to a grading device for ultra-fine powder. The grading device for ultra-fine powder comprises a stirring kettle, a stirring shaft, a metering pump, a high-speed centrifugal machine and a collecting kettle, wherein the stirring shaft, the metering pump, the high-speed centrifugal machine and the collecting kettle are arranged in the stirring kettle, a feeding opening of the metering pump is connected with the bottom of the stirring kettle through a PU (poly urethane) pipe, a discharging opening of the metering pump is connected with a feeding opening of the high-speed centrifugal machine through a PU pipe, and a discharging opening of the high-speed centrifugal machine is connected with the collecting kettle through a stainless steel hose. A grading method comprises the following steps that (1) a motor is started, the stirring shaft starts to rotate, and ultra-fine powder slurry is added into the stirring kettle to be stirred; (2) the high-speed centrifugal machine is started, and after the rotating speed of the high-speed centrifugal machine reaches 10000 to 16000 r / min, the metering pump is started for feeding; (3) the ultra-fine powder slurry enters the high-speed centrifugal machine to be graded through the metering pump, and overflow enters the collecting kettle from a flow-out position of an outlet of the high-speed centrifugal machine; (4) after the grading is completed, powder on a rotating drum of the high-speed centrifugal machine is cleaned and is collected. The grading device and the grading method have the advantages that the operation is simple, the grading efficiency is high, graded products have no pollution, and the quality stability of the powder is sufficiently ensured.

Description

technical field [0001] The invention relates to the field of ultrafine powder preparation, in particular to an ultrafine powder classification device and a classification method thereof. Background technique [0002] Ultrafine powder refers to tiny solid particles with a scale between molecules, atoms and bulk materials, micron and nanometer, including metal, non-metal, organic, inorganic and biological material particles. Ultrafine powder and its densification are one of the research hotspots in the field of materials. Compared with conventional materials, ultrafine powder has a series of excellent physical, chemical, surface and interface properties. [0003] At present, the classification methods of ultrafine powders have been reported, which can be divided into dry classification, wet classification and supercritical classification according to the state of classified materials. According to different grading force fields, it can be divided into gravity field grading, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00
Inventor 赵登永裘建栋彭家斌
Owner JIANGSU BOQIAN NEW MATERIALS