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Gradient discharge, airflow crushing, classification and sorting device and method

A technology of jet crushing and sorting device, which is applied to the separation of solids from solids by airflow, chemical instruments and methods, solid separation, etc. Insufficient separation, low sorting precision and other problems, to achieve the effect of reasonable energy distribution, high sorting precision and convenient operation

Pending Publication Date: 2019-09-10
XIAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the conventional stripping methods (rod mill, ball mill, planetary mill) have the disadvantages of high energy consumption, insufficient dissociation, and low sorting accuracy, and cannot achieve effective sorting of organic microscopic components and minerals.

Method used

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  • Gradient discharge, airflow crushing, classification and sorting device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] like figure 1A kind of cascade discharge airflow crushing classification and sorting device shown includes an airflow crushing unit and a cascade discharge unit, and the airflow crushing unit includes a feeding bin 1, a screw feeder 4 and an airflow pulverizer 5. A grading screen 2 is installed in the upper part of the feed bin 1, and the oversize outlet of the feed bin 1 is connected with an oversize discharge pipe 3, and the feed bin 1 is installed at the feed port of the screw feeder 4 , the discharge port of the screw feeder 4 is connected to the feed port of the airflow mill 5, and the airflow mill 5 is located below the screw feeder 4; the step discharge unit includes a primary classifier 6. The secondary classifier 7 and the three-stage classifier 8, the discharge port of the primary classifier 6 is connected with the feed port of the secondary classifier 7, and the discharge port of the secondary classifier 7 is connected to the three-stage classifier. The feed...

Embodiment 2

[0048] combine figure 1 , the present embodiment utilizes the method for classifying and sorting organic microscopic components and minerals in coal by means of the device described in Example 1, comprising the following steps:

[0049] Step 1. Feed the raw coal into the feeding bin 1. After being screened by the grading sieve 2, the oversize material is discharged through the oversize material discharge pipe 3, and the undersize material enters the screw feeder 4 and passes through the screw feeder. 4 is sent to the jet mill 5 for pulverization, and the raw coal particle size after pulverization by the jet mill 5 is ≤500 μm; the feeding speed of the screw feeder 4 is 120 g / min, and the crushing pressure of the jet mill 5 is 0.65 μm. MPa;

[0050] Step 2: The raw coal pulverized by the jet mill 5 enters the primary classifier 6 for the first classification and separation, and the fine coal that can pass through the gap between the classifying wheel blades of the primary class...

Embodiment 3

[0054] combine figure 1 , the present embodiment utilizes the method for classifying and sorting organic microscopic components and minerals in coal by means of the device described in Example 1, comprising the following steps:

[0055] Step 1. Feed the raw coal into the feeding bin 1. After being screened by the grading sieve 2, the oversize material is discharged through the oversize material discharge pipe 3, and the undersize material enters the screw feeder 4 and passes through the screw feeder. 4 is sent to the jet mill 5 for pulverization, and the raw coal particle size after pulverization by the jet mill 5 is ≤500 μm; the feeding speed of the screw feeder 4 is 50 g / min, and the crushing pressure of the jet mill 5 is 0.3 MPa;

[0056] Step 2: The raw coal pulverized by the jet mill 5 enters the primary classifier 6 for the first classification and separation, and the fine coal that can pass through the gap between the classifying wheel blades of the primary classifier ...

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Abstract

The invention discloses a gradient discharge, airflow crushing, classification and sorting device. The device comprises an airflow crushing unit and a gradient discharge unit; the airflow crushing unit comprises a feeding bin, a spiral feeder and an airflow crusher; a classification screen is mounted at the upper part in the feeding bin; the feeding bin is mounted in a feed port of the spiral feeder; a discharge port of the spiral feeder is connected with a feed port of the airflow crusher; the gradient discharge unit comprises a first-grade classifier, a second-grade classifier and a third-grade classifier connected in sequence; a first-grade airflow screen, a second-grade airflow screen and a third-grade airflow screen are mounted at the lower parts in the first-grade classifier, the second-grade classifier and the third-grade classifier; and electromagnetic automatic discharge valves and secondary air inlets are arranged on the outer sides of the lower parts of the first-grade classifier, the second-grade classifier and the third-grade classifier. The invention further provides a method for classifying and sorting organic microscopic components and minerals in coals by using thedevice. The device is low in energy consumption, full in dissociation and high in sorting precision, and can achieve effective sorting of the organic microscopic components and the minerals.

Description

technical field [0001] The invention belongs to the technical field of mineral crushing and sorting, and in particular relates to a device and method for cascaded discharge airflow crushing and sorting. Background technique [0002] With the gradual reduction of high-quality coal resources in my country, the requirements for coal quality are increasing day by day in the further coal chemical industry and fine processing of coal-based materials. The organic microcomponents and minerals in coal have a great influence on the deep processing and refined utilization of coal. Effective sorting and enrichment of coal microcomponents and minerals is the key to realizing the classification and high quality of coal resources. important way to use. Only when the organic microscopic components and minerals in coal are fully dissociated can the separation be optimized. The occurrence state of minerals and microcomponents in coal shows that the full dissociation of different components ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/06B02C23/02B02C23/08B02C23/20B07B11/08
CPCB02C19/068B02C23/02B02C23/08B02C23/20B07B11/08
Inventor 李振付艳红吴燕张怀青赵承乾赵凯吴思萍周安宁
Owner XIAN UNIV OF SCI & TECH
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