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Crushing and classifying device

A grading device and powder technology, applied in grain processing, etc., can solve the problems of insufficient discharge and removal of fine powder, poor classification and discharge efficiency of fine powder, etc.

Inactive Publication Date: 2009-01-21
日本阿尔斯泰克
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, according to the pulverizers disclosed in these patent documents, it is difficult to collect the fine powder that spirals near or along the inner surface of the side wall of the housing through the upper opening of the cylindrical body and the suction hood. Powder discharge and removal is inadequate
In particular, because the flow rate of the swirling airflow is high and the amount of fine powder increases near the inner surface of the case, the classification and discharge efficiency of fine powder is not good

Method used

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  • Crushing and classifying device

Examples

Experimental program
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Embodiment 1

[0026] figure 1 and 2 The pulverizing and classifying apparatuses of the first embodiment are respectively shown. This pulverizing and classifying device is used in a gravel production facility to pulverize an object to be processed (such as raw rock) and produce gravel or crushed stone. Although figure 2 is along figure 1 In the longitudinal section of line A-A, but figure 2 Also show exhaust fan 30 and blower 31 (will introduce later) in, so that represent their connection position, but these fans are in figure 1is not shown in . The crushing and classifying device comprises: an upper housing 1 with a supply port 2 at an upper end portion for feeding objects, the inner space of the upper housing 1 serving as a crushing chamber 3; and a lower case 4 which is coaxially connected below the upper case 1 and has a discharge port 5 at a lower end portion for discharging remaining pulverized objects after removing fine powder , the inner space of the lower housing 4 is us...

Embodiment 2

[0038] The following will refer to Figure 5 The pulverizing and classifying apparatus of the second embodiment will be described. The same reference numerals as in the first embodiment denote the same components, and their descriptions are omitted. The different parts are mainly described below.

[0039] In the pulverizing and classifying device of the second embodiment, the collision body 22 is arranged on the inner periphery of the upper housing 1; and, a plurality of impactors 23 as impact members are arranged on the outer periphery of the rotor 14 without closing the ejection port. 13. The plurality of impactors 23 are used to impact and crush objects to be processed thrown out from the rotor or bounced crushed objects. With this structure, objects thrown from the rotor 14 by the centrifugal force collide with the collision body 22 and are pulverized by it. Also, the pulverized objects rebounded toward the rotor 14 by colliding with the collision body 22 are impacted b...

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Abstract

A crushing and classifying device has a rotor (14) for crushing an object to be processed by projecting it by a centrifugal force to a collision section installed in a housing and has a classifying tube (8) connected to a side wall of the housing (4) and discharging fine powder together with a rotating flow produced in the housing (4) by the rotation of the rotor (14). In a horizontal plane passing through an intersecting point P1 between the tube axis of the classifying tube (8) and the inner surface of the connection section of the side wall, theta1 is set in a range of 30 - 90 , with theta1 being an angle that a straight line m passing through the rotation axis center O1 of the rotor (14) and through the intersecting point P1 forms at P1 with the tube axis of the classifying tube (8).

Description

technical field [0001] The present invention relates to a pulverizing and classifying device for pulverizing a solid block (such as rock or ore) as an object to be processed, and classifying and discharging relatively fine powder in the pulverized object. Background technique [0002] When objects to be processed, such as rocks or ores, are crushed or ground to produce gravel or crushed stone, fine powder is inevitably produced. Too high a fines content may make the product substandard. Therefore, it is necessary to remove fine powder from the pulverized body after the pulverized body is made. If the fine powder can be removed while the object is crushed or ground, the device or treatment for removing the fine powder from the crushed object can be omitted, and the load on the device for removing the fine powder can be reduced, thereby increasing High productivity and simplification of equipment. [0003] For example, there is disclosed in Japanese Unexamined Patent Applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C13/286B02C13/14B02C13/18B02C19/00B02C23/10
CPCB02C13/286B02C2013/28681B02C13/1807B02C19/0018B02C23/10B02C13/18B02C13/30B02C23/08
Inventor 天宅俊造浜口正记山形一弘
Owner 日本阿尔斯泰克