CN104117486B - The simple gas flow sizing machine of powder - Google Patents

Abstract

The utility model relates to a simple powder air classifier which can classify the particles above 120 mesh in the pulverized mixed powder in the dry process of quartz sand. The simple air classifier is a vertical equipment with a double casing structure, which consists of upper, middle and lower parts. The upper casing, the middle casing and the lower casing constitute the outer cylinder of the powder simple airflow classifier; the upper inner sleeve and the middle inner cylinder constitute the inner sleeve. The material enters the inner sleeve from the semi-finished mixture inlet, and then the uniform impeller is driven by the motor to distribute the material evenly between the ring gap formed by the middle shell and the inner cylinder. The classified airflow enters from the lower discharge port, and in the ring gap, The fine primary granular products are separated and taken away from the mixture of semi-finished products, and then discharged from the upper discharge port, and the separated semi-finished products are discharged from the lower outlet. Since the fine particles above 120 mesh have been separated and collected, no dust pollution will be formed in the subsequent screening and other processes.

Description

Powder Simple Airflow Classifier

technical field

The invention relates to a wind separation and classification equipment for crushed quartz sand, in particular to a simple airflow classification machine for powder materials.

Background technique

The general quartz sand dry processing production process is that the quartz crushed stone is crushed by coarse crushing and fine crushing to become a semi-finished mixed powder with a particle size below 5mm, and then screened and classified to form products with different particle sizes. The following problems exist in actual production: 1. The screening equipment commonly used at present is a mechanical sieve, and the classification efficiency of the mechanical sieve to fine particle products is low. In the dry production of quartz sand, it is necessary to classify the products that pass through the 120-mesh sieve (accounting for about 15% of the total product). Due to the small particle size of this grade of products, the mechanical sieve has low screening ability and low efficiency for such products. 2. Dry processing of quartz sand will produce a lot of dust pollution. The crushing process in dry processing will inevitably produce a large number of fine particles, which float in the air to form dust, and these fine particles exist in the entire production process of crushing, semi-finished crushed material transportation, screening, and finished product packaging. All process links must meet environmental protection requirements, and a large number of types and quantities of dust collection and treatment equipment are required. These problems are one of the main factors restricting the large-scale production of quartz sand dry processing. A better idea to solve the above problems is to find out the link of dust generation and start from the source to solve the problem of classification and dust pollution of fine particle size products, that is, to add fine particle size product separation and recovery equipment after the raw material is crushed and processed , to collect and classify the fine particles in the semi-finished mixture, which not only solves the dust pollution, but also solves the problem of low classification efficiency of the subsequent mechanical sieve for the first-grade products with smaller particle sizes. In order to separate the fine particles produced in the crushing process from the crushed mixture to the greatest extent, the more effective method is air classification. There are many types and varieties of airflow classifiers on the market, but they are usually used for the classification of finer products with a particle size above 200 mesh, and the classification processing capacity and processing efficiency are relatively low, so it is not suitable for particle size below 5mm. The graded treatment of products with a particle size above 120 mesh contained in the quartz crushed mixture, the research and development of special equipment for the airflow classification of the quartz crushed mixture suitable for the large-scale continuous production process of quartz sand dry hair processing is an inevitable requirement of the quartz sand dry hair processing process .

Contents of the invention

In order to solve the problem of poor classification effect, low efficiency and dust pollution of the first-grade products with relatively small particle sizes above 120 mesh by the general airflow classifier in the dry processing of quartz sand, the invention provides a method that is compatible with the dry process of quartz sand. The matching airflow classification equipment is the powder simple airflow classification machine.

The idea of solving the problem of the present invention is to connect the simple airflow classifier of powder in series between crushing and screening, apply the principle of airflow classification, and extract the products with a particle size of 120 mesh or more from the system through airflow pumping. Dust is contained in products with a particle size of 120 mesh or more, and the amount of dust containing fine particles in the semi-finished mixture separated from the powder simple airflow classifier is very small, and the subsequent transportation, mechanical screening, packaging and other links will not appear Dusty pollution problem. For the subsequent screening process, since the products with a particle size above 120 mesh have been separated, the processing capacity of mechanical screening has been significantly improved, and the production efficiency of the entire process has been improved. For the extracted products with a particle size of 120 mesh or more (including dust that is easy to fly), it can be further classified and treated by configuring corresponding settling and dust collection equipment.

The technical solution adopted by the present invention to solve the technical problem is: the simple airflow classifier for powder is a vertical equipment with a double casing structure, and consists of upper, middle and lower parts. The top port of the equipment is the outlet of the airflow and the product with a particle size above 120 mesh, the inclined port on the upper side is the inlet of the semi-finished mixture, and the lower opening is the inlet of the classified airflow and the outlet of the semi-finished mixture left after separation.

The upper part of the equipment is composed of a shell and an inner sleeve. The ring gap between the shell and the inner sleeve is the channel for graded products. The upper part of the inner sleeve is sealed and the lower part is open. The inclined pipe passes through the shell, the shell and the inner sleeve. The ring gap enters the inner sleeve to form a channel for the material to enter the inner sleeve.

The middle part of the equipment is composed of an outer cylinder shell and an inner cylinder. A vertical motor is installed inside the cylinder. The shaft end of the motor protrudes from the upper end plate of the cylinder. The uniform impeller is installed on the shaft head. When working, the motor drives the upper uniform impeller. Rotate so that the semi-finished mixture can be evenly dispersed in the ring gap formed by the shell and the inner cylinder. The lower part of the cylinder is the bottom cover plate, which is connected to the cylinder by bolts, so that the inside of the cylinder is completely isolated from the ring gap. The cylinder and the shell are connected by several channel short tubes to form a channel communicating with the atmosphere inside the cylinder, which is used for heat dissipation of the motor and access of cables.

The beneficial effects of the present invention are: since the simple airflow classifier for powder materials is connected in series between crushing and screening, the products with a particle size above 120 mesh are extracted from the system before screening, and the dust content in the remaining semi-finished mixture is very high. Less, in the subsequent screening and other operations, there will be no large dust pollution, and it is no longer necessary to set up dust removal equipment for the subsequent process links; the effect and efficiency of screening are improved.

Description of drawings

Figure 1 is a schematic diagram of the structure of a simple airflow classifier for powder.

In the figure, 1. Mixed material outlet and graded air inlet, 2. Classifier lower shell, 3. Motor, 4. Middle body inner cylinder, 5. Middle body outer cylinder shell, 6. Middle body inner cylinder and Outer cylinder connecting pipe, 7. Uniform impeller, 8. Upper shell, 9. Semi-finished mixture inlet, 10. Inner sleeve, 11. Graded product and air outlet.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1, the upper casing 8, the middle outer cylinder casing 5, and the lower casing 2 constitute the outer cylinder of the simple airflow classifier for powder, and the upper inner sleeve 10 and the middle body inner cylinder 4 constitute the inner sleeve. The material enters the inner sleeve 10 from the semi-finished mixture inlet 9, and then the motor 3 drives the uniform impeller 7 to distribute the material evenly between the middle shell and the inner cylinder, and the classified air enters from the lower discharge port 1, In the annulus, the fine first-grade granular products are separated from the semi-finished mixture, and then discharged from the upper discharge port 11, and the separated semi-finished materials are discharged from the lower outlet 1, and the power line of the motor is connected by the short tube 6 introduce.

The foregoing is only an embodiment of the present invention, and is not limited to the structural content given in the accompanying drawings of the present invention. For those skilled in the art, within the scope of the technical theory of the present invention, changes in the shape and structure of the inner and outer sleeves, equivalent replacements and improvements, etc. all belong to the protection scope of the patent of the present invention.

Claims (1)

1. null1. the simple gas flow sizing machine of powder，Including semi-finished product compound import，Discharging opening，Air inlet，Vertical and cylindrical housing，It is characterized in that: the simple gas flow sizing machine of powder is double-tube structure，Top is made up of upper body and inner sleeve，Annular space between upper body and inner sleeve is the passage of graded product，Inner sleeve top is shut，Lower open，Middle part is made up of middle part body urceolus housing and middle part body inner cylinder，Described middle part body inner cylinder is internally installed vertical machine，Motor shaft end stretches out described middle part body inner cylinder upper end plate，Uniform impeller is installed on spindle nose，The bottom of described middle part body inner cylinder is bottom cover plate，Described bottom cover plate is connected with described middle part body inner cylinder by bolt，The inside of described middle part body inner cylinder is completely isolated with described annular space，Described middle part body inner cylinder and middle part body urceolus housing are connected by several passage short tubes，Form the internal passage communicated with air of described middle part body inner cylinder，Heat radiation and the access of cable for motor.