CN103285994A - Powder grading method - Google Patents

Abstract

The invention provides a powder grading method. The powder grading method comprises the following steps that: (1) materials enter a grinder for grinding; (2) the ground materials are fed into a powder concentrator, primary air, secondary air and tertiary air are fed into the powder concentrator so as to generate rotary air flow, and the materials are sorted in the rotary air flow; (3) after sorting, large-particle materials return and enter the grinder for grinding, gas enters a high-efficiency bag-type dust collector for re-sorting, and the dust is collected by dust-collecting points; (4) waste gas sorted out from the high-efficiency bag-type dust collector is exhausted by a fan, and the sorted-out finished materials are collected. The powder grading method provided by the invention can grade powder and is applicable to grading powdery materials in the cement industry or grading equivalent materials in other industries; compared with a traditional air powder-grading method, the powder grading method provided by the invention has the advantages that the grading efficiency is high, the material treating amount is large, the particle grading size range of a product is narrow, the operation is simple, and the adjustment of the particle diameter is convenient.

Description

A kind of particle classifying method

Technical field

The present invention relates to a kind of particle classifying method, belong to the feed separation technical field.

Background technology

Particle classifying is the horizontal vortex principle that utilizes air, and powder is carried out classification, is applicable to that cement industry carries out classification to granular material or other industry to suitable material.

Existing particle classifying method, it is low to have classification efficiency, and the material handling amount is few, the weak point of complicated operation.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art part, a kind of particle classifying method is provided.

Particle classifying method of the present invention comprises the steps:

1) material enters the flour mill grinding;

2) feeding of the material behind grinding powder concentrator is sent into wind, secondary wind and tertiary air one time in powder concentrator,

Produce swirling eddy, material carries out sorting in the air-flow of rotation;

3) large granular materials after the sorting again feed back enter into the flour mill grinding; Gas then enters efficient bag filter and carries out sorting again; Dust is gathered dust a little to be collected;

4) waste gas that sub-elects from efficient bag filter is discharged through blower fan, the material finished product that sub-elects then by

Collect.

Particle classifying method of the present invention, has following technique effect: can carry out classification to powder, be applicable to that cement industry carries out classification to granular material or other industry to suitable material, compare with traditional air particle classifying method, have the classification efficiency height, the material handling amount is big, and product particle grating size range is narrow, simple to operate, advantage such as particle diameter is easy to adjust.

The specific embodiment

Particle classifying method of the present invention comprises the steps:

1) material enters the flour mill grinding;

2) feeding of the material behind grinding powder concentrator is sent into wind, secondary wind and tertiary air one time in powder concentrator,

Produce swirling eddy, material carries out sorting in the air-flow of rotation;

3) large granular materials after the sorting again feed back enter into the flour mill grinding; Gas then enters efficient bag filter and carries out sorting again; Dust is gathered dust a little to be collected;

4) waste gas that sub-elects from efficient bag filter is discharged through blower fan, the material finished product that sub-elects then by

Collect.

Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, other modifications that those of ordinary skills make technical scheme of the present invention or be equal to replacement, only otherwise break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of the claim scope of the present invention.

Claims (1)

1. a particle classifying method is characterized in that, comprises the steps:

1) material enters the flour mill grinding;

2) feeding of the material behind grinding powder concentrator is sent into wind, secondary wind and tertiary air one time in powder concentrator,

Produce swirling eddy, material carries out sorting in the air-flow of rotation;

3) large granular materials after the sorting again feed back enter into the flour mill grinding; Gas then enters efficient bag filter and carries out sorting again; Dust is gathered dust a little to be collected;

4) waste gas that sub-elects from efficient bag filter is discharged through blower fan, the material finished product that sub-elects then by

Collect.