CN204261943U - Stainless steel slag sorting device - Google Patents

Abstract

The utility model relates to a metallurgical industry slag processing technology field discloses a stainless steel slag sorting unit. The device comprises a hopper, a bar screen, a bucket elevator, a powder concentrator, a cyclone dust removal device and a bag-type dust remover, wherein the powder concentrator is externally connected with an air blower, a granular material outlet is formed in the bottom end of the powder concentrator, and a powder outlet is formed in the upper portion of the side wall opposite to a feeding port of the powder concentrator. After the stainless steel slag raw material is primarily screened, the stainless steel slag is sorted by the powder concentrator in a micro-negative pressure working environment, so that the enrichment of granules with larger granularity containing metal materials is facilitated, powder with smaller granularity is collected by the cyclone dust collector, and the dust can be prevented from being discharged into the atmosphere by the cloth bag dust collector; the utility model discloses reduced the wearing and tearing of slag to equipment, prolonged the life of equipment, reduced manufacturing cost, also reduced wet processing water consumption and water treatment cost simultaneously, realized energy saving and emission reduction.

Description

Stainless steel slag sorting device

technical field

The utility model relates to the technical field of steel slag treatment in the metallurgical industry, in particular to a sorting device for stainless steel slag.

Background technique

Steel slag is industrial solid waste slag produced in the process of smelting steel. The waste slag produced by steel mills can be divided into two types due to different cooling processes: dry slag and water slag. Generally speaking, there are three components in steel slag: steel grain, iron powder and waste ash. Selecting the steel grain and iron powder through a reasonable process can produce huge economic benefits.

First, the steel slag needs to be ground to break the structure between them and separate them. The equipment used to grind steel slag is ball mill, rod mill, etc.

Domestic metallurgical enterprises usually use wet treatment for stainless steel slag. First, the steel slag is evenly sent to the ball mill for grinding. Steel grains, or use a conveyor to send the steel slag that has been selected into the rod mill for fine grinding, and use the flotation method to effectively select weak magnetic stainless steel metal materials. The remaining waste ash is discharged from the waste material port of the magnetic separator. The waste material port is connected with a conveyor, which is sent into the waste ash pool, and the waste ash pool is cleaned regularly. Waste ash is a good building material, which can be sold to cement factories to make cement or building materials factories.

There are following deficiencies in wet processing:

(1) A large amount of powdery materials and granular materials in stainless steel slag enter the processing equipment without powder and granule separation, which is easy to cause wear and tear on the grinding equipment, and requires frequent maintenance and replacement. The investment in grinding equipment is large and the production cost is high;

(2) During the cooling process of stainless steel slag, water needs to be sprinkled for cooling, which makes it difficult to control the water content in stainless steel slag, and it is even more difficult to control the water content in stainless steel slag in humid climate areas, making it impossible to achieve air separation of stainless steel slag;

(3) In the powder with a particle size of <3mm, the content of metal materials is very low, and entering the wet treatment without separation will increase the water consumption and increase the cost of water treatment.

Utility model content

The purpose of the utility model is to provide a sorting device for stainless steel slag to solve the problem of easy wear and tear of equipment and high production cost in the wet treatment of stainless steel slag. The utility model is suitable for air separation of stainless steel slag in dry areas.

In order to solve the problems of the technologies described above, the technical solution adopted by the utility model is:

A sorting device for stainless steel slag, which comprises a hopper, the feed inlet of the hopper is provided with a bar screen, the discharge outlet of the hopper is connected with the bottom end of a bucket elevator, and the top of the bucket elevator is connected with the bottom end of the bucket elevator. The feed inlet of the raw material bin is connected, and a sealed bin is provided at the outlet of the raw material bin, and the outlet of the sealed bin is connected with a powder separator, and the bottom end of the powder separator is provided with a pellet Outlet, the upper part of the side wall of the powder separator opposite to the feed port of the powder separator is provided with a powder outlet, and the powder outlet is connected to the inlet end of the cyclone dust removal device through the air duct, and the cyclone dust removal device The outlet at the upper end is connected with the bag filter, and the lower end of the cyclone dust removal device is provided with a dust removal port.

As a further improvement of the utility model, the feed port of the powder classifier is externally connected with a blower.

As a further improvement of the utility model, the blower is a variable frequency blower, and the amount of induced air is determined according to the particle size of the powder to be screened.

As a further improvement of the utility model, the pellet outlet of the powder classifier is connected to the bottom end of the pellet elevator, and the top of the pellet elevator is connected to the feed port of the pellet bin.

As a further improvement of the utility model, the powder separator is a V-type powder separator.

As a further improvement of the present utility model, the cyclone dust collector is composed of two cyclone dust collectors, one of which is for discharging powder, and the other cyclone dust collector is for powder collection.

As a further improvement of the utility model, the particle size of the granules is ≥3mm.

As a further improvement of the utility model, the particle size of the powder is <3mm.

As a further improvement of the utility model, the bar spacing of the bar sieve is 180-250mm.

The process of utilizing the utility model to complete the sorting of stainless steel slag is:

Step 1. Preliminarily screen the stainless steel slag raw slag by using the rod sieve, and lift the screened stainless steel slag to the feed inlet of the high-level raw material bin through the bucket elevator;

Step 2, the stainless steel slag enters the feed port of the powder classifier through the sealed bin provided at the feed port of the raw material bin, and the stainless steel slag is classified by the powder classifier, and the fine powder selected by the powder classifier The degree is adjusted by the frequency conversion of the blower. Under the action of the blower, the powder in the stainless steel slag is blown to the powder outlet by the wind, and enters the cyclone dust removal device through the air duct, and the pellets containing metal materials Under the action of gravity, it falls to the outlet of the pellets, and is lifted by the pellet elevator to be stored in the pellet bin;

Step 3: The cyclone dust collector collects the powder, and the remaining dust continues to enter the bag filter and is collected by the bag filter.

Since the powder separator is equipped with an external blower, the equipment operates under a slight negative pressure, and the induced air volume of the bag filter is slightly greater than the maximum air volume of the blower.

The beneficial effects of the utility model are:

(1) A rod screen is installed at the bottom of the stainless steel slag hopper to conduct preliminary screening of the raw material of stainless steel slag. The steel slag that meets the requirements enters the processing equipment. The wear and tear of the lump material on the powder classifier;

(2) Adjust the particle size of air-selected powder by adjusting the blower externally connected to the powder classifier and the air volume of the bag filter, so as to reliably realize air-selection of stainless steel slag;

(3) The interior of the winnowing device described in the utility model is a slight negative pressure operating environment, and the dust will not leak out, which is conducive to improving the working environment;

(4) There will be no loss of metal during the powder selection process, which is conducive to the enrichment of pellets with high metal content;

(5) The stainless steel slag enters from the upper feed port of the powder classifier. Under the action of gravity, the steel slag continuously collides with the step breaking plate inside the powder classifier. The agglomerated steel slag is broken up. At this time, the loose steel slag Under the action of the air flow, the granules and powder are classified by the deflector, which reduces the wear of the steel slag on the equipment grinding, prolongs the service life of the equipment, and reduces the production cost;

(6) The purpose of using two cyclone dust collectors in this utility model is to make the production process continuous. When one cyclone dust collector is used for powder discharge operations, the other cyclone dust collector is used for powder material collection operations; the use of cyclone dust collectors can also reduce The dust collection capacity of the bag filter reduces the operating cost of the bag filter;

(7) The utility model is combined with existing mature technologies, which reduces technical risks, reduces the number of dust production points and also reduces the dust removal capacity of the dust collector, thereby reducing the cost of dust removal equipment and reducing environmental pollution. It also reduces the water consumption and water treatment cost of wet treatment, and realizes energy saving and emission reduction.

Description of drawings

Fig. 1 is the structural representation of the utility model;

In the figure: 1. Hopper, 2. Bucket elevator, 3. Raw material bin, 4. Powder separator, 5. Grain elevator, 6. Grain bin, 7. Cyclone dust removal device, 9. Bag filter.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

A sorting device for stainless steel slag, which includes a hopper 1, a bar screen is provided at the feed inlet of the hopper 1, the discharge outlet of the hopper 1 is connected with the bottom end of the bucket elevator 2, and the top end of the bucket elevator 2 It is connected with the inlet of the raw material bin 3, and the outlet of the raw material bin 3 is provided with a sealed bin, and the outlet of the sealed bin is connected with the V-type powder separator 4; the inlet of the V-type powder separator 4 The frequency conversion blower is externally connected, and the induced air volume is determined according to the granularity of the powder to be screened. The bottom of the V-type powder classifier 4 is provided with a pellet outlet, and the pellet outlet is connected to the bottom of the pellet elevator 5. The top of the material elevator 5 is connected to the feed port of the pellet bin 6; the upper part of the side wall of the V-type powder separator 4 opposite to the feed port of the V-type powder separator 4 is provided with a powder outlet, and the powder outlet passes through The air duct is connected to the inlet end of the cyclone dust removal device 7. The cyclone dust removal device 7 is composed of two cyclone dust collectors. One of the cyclone dust collectors discharges powder, and the other cyclone dust collector collects powder materials. The cyclone dust collector The upper end outlet of 7 is connected with the bag filter 9, and the lower end of the cyclone dust removal device 7 is provided with an ash removal port.

In the utility model, the particle size of the granular material is more than or equal to 3mm, and the particle size of the powder material is less than 3mm. The bar spacing of the bar sieve 1 is 180-250 mm.

Utilizing the utility model to carry out stainless steel slag sorting comprises the following steps:

Step 1. Preliminarily screen the stainless steel slag raw slag with a rod sieve 1, and lift the screened stainless steel slag to the feed inlet of the high-level raw material bin 3 through the bucket elevator 2;

Step 2: The stainless steel slag enters the feed port of the powder classifier 4 through the sealed bin provided at the feed port of the raw material bin 3, and the stainless steel slag is separated from powder by the powder classifier 4, and the fineness of the powder is selected by the powder classifier 4. Adjusted by the frequency conversion of the blower, under the action of the blower, the powder in the stainless steel slag is blown to the powder outlet by the wind, and enters the cyclone dust removal device 7 through the air duct, and the pellets containing metal materials fall to the pellets under the action of gravity. At the exit, it is lifted by the pellet elevator 5 to be stored in the pellet bin 6;

Step 3: The cyclone dust collector 7 collects the powder, and the remaining dust continues to enter the bag filter 9 to be collected by the bag filter 9 .

After preliminary screening of the raw material of stainless steel slag, the utility model uses the micro-negative pressure working environment caused by the external blower of the powder classifier to sort the stainless steel slag, which is beneficial to the enrichment of larger granular materials containing metal materials. The smaller powder is collected by the cyclone dust collector, and the bag filter can prevent the dust from being discharged into the atmosphere; the utility model is composed of existing mature technologies, which reduces technical risks, reduces equipment wear, and prolongs the service life of the equipment , reduce the production cost, reduce the number of dust production points and also reduce the dust collection capacity of the dust collector, and realize energy saving and emission reduction.

Claims (9)

1. a stainless steel slag sorting unit, it is characterized in that: it comprises hopper (1), the charging aperture of hopper (1) is provided with bar screen, the discharging opening of described hopper (1) is connected with the bottom of bucket elevator (2), the top of described bucket elevator (2) is connected with the charging aperture of raw material cabin (3), the discharge outlet of described raw material cabin (3) is provided with gas-tight silo, the discharging opening of described gas-tight silo is connected with powder concentrator (4), the bottom of described powder concentrator (4) is provided with Pellet exit, powder concentrator (4) side wall upper part opposite with described powder concentrator (4) charging aperture is provided with powder outlet, described powder outlet is connected by the arrival end of air channel with cyclone dust collector (7), the upper end outlet of described cyclone dust collector (7) is connected with sack cleaner (9), described cyclone dust collector (7) lower end is provided with ash disposal mouth.

2. stainless steel slag sorting unit according to claim 1, is characterized in that: the external air blast of charging aperture of described powder concentrator (4).

3. stainless steel slag sorting unit according to claim 2, is characterized in that: described air blast is frequency conversion air blast, and the size of its blow rate required is determined according to the granularity of required screening powder.

4. stainless steel slag sorting unit according to claim 1 and 2, it is characterized in that: the Pellet exit of described powder concentrator (4) is connected with the bottom of pellet elevator (5), the top of described pellet elevator (5) is connected with the charging aperture of pellet storehouse (6).

5. stainless steel slag sorting unit according to claim 4, is characterized in that: described powder concentrator (4) is V-type powder concentrator.

6. stainless steel slag sorting unit according to claim 1, it is characterized in that: described cyclone dust collector (7) is made up of two cyclone dust collectors, cyclone dust collectors described in one of them are when discharging powder, and cyclone dust collectors described in another carry out powder and collect operation.

7. stainless steel slag sorting unit according to claim 1, is characterized in that: the granularity >=3mm of described pellet.

8. stainless steel slag sorting unit according to claim 1, is characterized in that: the granularity < 3mm of described powder.

9. stainless steel slag oven dry according to claim 1, pneumatic separation device, is characterized in that: the rod spacing of described bar screen is 180 ~ 250mm.