CN108624730A - Waste material cleaning system and method for cleaning in a kind of large blast furnace overhaul stove - Google Patents

Abstract

The invention belongs to the field of blast furnaces in ironmaking, and in particular relates to a waste cleaning system and cleaning method in a large-scale blast furnace overhaul furnace, including an excavator, a roller belt conveyor, a nozzle, and a slag tank. In the present invention, two excavators are hoisted from the inspection hole on the top of the furnace to the furnace; one excavator is equipped with a hydraulic hammer to crush the waste, and the other is equipped with a bucket shovel to transport the waste; the tuyere platform of the blast furnace is equipped with a roller belt conveyor. The end extends from the air supply port of the blast furnace to the furnace; a drum belt conveyor is installed on the casting house platform of the blast furnace. Through excavators, roller belt conveyors and flow nozzles, the air supply port of the blast furnace is transported to the ground slag tank through the tuyere platform, the casthouse platform and finally to the ground slag tank, which realizes the replacement of manual work by mechanical construction, greatly improves work efficiency, and effectively shortens blast furnace overhaul The construction time for waste cleaning in the furnace is reduced, the construction cost is saved, and the blast furnace can be produced in advance.

Description

A system and method for cleaning waste in a large-scale blast furnace overhaul furnace

technical field

The invention relates to the technical field of blast furnaces in ironmaking, and in particular provides a waste cleaning system and cleaning method in a large-scale blast furnace overhaul furnace.

Background technique

At present, when the known large-scale blast furnace is overhauled, there are two methods for cleaning the waste in the furnace. One is to partially cut the furnace shell by gas welding, remove part of the stave and refractory bricks in the furnace, and then remove the residual waste in the furnace by means of mechanical equipment. The iron clot and the waste are cleaned out of the furnace together, and finally the furnace shell is restored to its original shape, and the stave is installed and refractory bricks are built. This method can clean up waste faster, but the furnace shell cannot be restored to its original shape due to damage and deformation, the water pipes connected to the cooling wall are prone to deformation, cracking and water leakage, and iron seepage is likely to occur in gaps where new and old refractory bricks are connected, and even cause hearth burn-through accidents.

The other is not to damage the furnace shell, relying on scaffolding, manual cleaning by primitive methods such as pneumatic picks, sledgehammers, and steel drills, and finally transporting the slag and iron out from the air supply port and the iron port. Due to the extremely strong iron scale in the furnace and a large amount of residual iron, it is very difficult to clean up, not only labor-intensive, but also time-consuming. If there is a large amount of residual iron in the furnace, the cleaning time will be as long as dozens of days or even longer .

Contents of the invention

In order to solve the above technical problems, the present invention provides a large-scale blast furnace overhaul furnace waste cleaning system and cleaning method, through the analysis and demonstration of the furnace body structure of the entire blast furnace, the excavator is used to hoist the excavator into the blast furnace hearth, and the mechanical Construction replaces manual work to quickly clean up the waste in the furnace, and an electric drum belt conveyor is added to reverse the transportation, so as to solve the problems in the prior art that the furnace shell is damaged and deformed and cannot be restored to its original shape, manual cleaning is labor-intensive, and cleaning time is long.

The present invention is achieved in this way, a waste cleaning system in a large-scale blast furnace overhaul furnace, including a drum belt conveyor A, a nozzle A, a roller belt conveyor B, a nozzle B and a slag tank, and the drum belt conveyor A is arranged on the tuyere platform, One end extends into the air supply port of the blast furnace, and the bottom of the other end is in contact with the top of the nozzle A. The roller belt conveyor B is set on the platform of the cast iron factory. The lower end of the nozzle A is in contact with the top of the roller belt conveyor B. The roller belt conveyor B The bottom of the other end is in contact with nozzle B, and the bottom of nozzle B is aimed at the slag tank.

Further, in the blast furnace, an excavator A and an excavator B are provided, the working end of the excavator A is a hydraulic hammer, and the working end of the excavator B is a bucket.

Further, there are multiple slag tanks, and each slag tank is set on a trolley, and the trolleys are connected in sequence and pulled by the front of the vehicle.

Further, the width of the roller belt conveyor A and the roller belt conveyor B is 1.2m.

A method for cleaning waste in the furnace by using the above-mentioned large-scale blast furnace overhaul furnace waste cleaning system is provided, including the following steps:

1) Put the waste in the furnace on the roller belt conveyor A, and the roller belt conveyor transports the waste to the nozzle A, and the waste is transported to the roller belt conveyor B along the nozzle A;

2) The roller belt conveyor B continues to transport the waste, and when it reaches the end, it slides off the nozzle B and falls into the slag tank.

Further, the blast furnace is equipped with an excavator A and an excavator B, the working end of the excavator A is a hydraulic hammer, the working end of the excavator B is a bucket, the excavator A is responsible for crushing waste, and the excavator B is responsible for crushing the waste Ship to the roller belt conveyor A.

Further, the excavator A and the excavator B are separated from the operating room and the machine body outside the blast furnace, lifted from the inspection hole to the blast furnace in turn, and reassembled in the blast furnace.

Further, there are multiple slag tanks, and each slag tank is set on a trolley, and the trolleys are connected in sequence and pulled by the front of the car. When the first slag tank is filled with waste, the front of the car pulls the trolley forward to move the first slag tank. The two slag tanks are pulled to directly below the nozzle B, and each slag tank is filled in turn until the waste slag is cleaned up.

Compared with the prior art, the present invention has the advantages of:

1. Construction under the premise of not destroying the furnace shell, avoiding the failure to restore the original shape due to the damage and deformation of the furnace shell, ensuring that the water pipes connected to the cooling wall will not be deformed, cracked and leaked, and there is no need to re-build refractory bricks.

2. A special plan is adopted to hoist the excavator into the furnace, mechanically clean the material, and transport the material by belt, which greatly improves the progress of cleaning the furnace. It is safe and environmentally friendly, leading the country.

3. Mechanical construction replaces manual work, which greatly improves work efficiency, effectively shortens the construction time for waste cleaning in blast furnace overhaul, saves construction costs, shortens the total construction period, and enables blast furnaces to be produced in advance.

4. It avoids manual cleaning by original methods such as jacks, sledgehammers, and steel drills, and cross-operation, which increases the safety factor of the construction process in the blast furnace.

5. The technical innovation of the present invention has been comprehensively promoted and applied, achieved good results, and produced huge economic and social benefits.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

Fig. 1 is a schematic diagram of the structure of the invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to Fig. 1, the present invention provides a waste cleaning system in a large-scale blast furnace overhaul furnace, including a drum belt conveyor A1, a nozzle A2, a drum belt conveyor B3, a nozzle B4 and a slag tank 5, and the drum belt conveyor A1 is located on the tuyere platform 6 One end extends into blast furnace air outlet 7, and the bottom of the other end contacts and connects with the top of the nozzle A2. The drum belt conveyor B3 is set on the platform of the cast iron plant, and the lower end of the nozzle A2 contacts and connects with the top of the drum belt conveyor B3. The bottom of the other end of the belt conveyor B3 is in contact with the spout B4, and the bottom of the spout B4 is aligned with the slag pot 5.

The method for cleaning the waste in the furnace by using the above-mentioned large-scale blast furnace overhaul furnace waste cleaning system includes the following steps:

1) Put the waste in the furnace on the roller belt conveyor A1, and the roller belt conveyor A1 transports the waste to the nozzle A2, and the waste is transported to the roller belt conveyor B3 along the nozzle A2;

2) The roller belt conveyor B3 continues to transport the waste, and slides down from the nozzle B4 after reaching the end, and falls into the slag tank 5.

In order to conveniently put the waste in the furnace on the roller belt conveyor A1, as an improvement of the technical scheme, there are excavator A8 and excavator B9 in the blast furnace, the working end of the excavator A8 is a hydraulic hammer, and the working end of the excavator B9 for the bucket. The excavator A8 is responsible for crushing waste, and the excavator B9 is responsible for transporting the waste to the roller belt conveyor A1.

Due to the large size of the excavator, it is impossible to directly send it into the blast furnace as a whole. Therefore, the excavator A8 and excavator B9 are separated from the operation room and the machine body outside the blast furnace, and are hoisted from the inspection hole to the blast furnace in sequence. reassemble.

In order to realize the continuity of loading waste, as an improvement of the technical solution, there are multiple slag tanks 5, and each slag tank 5 is arranged on a trolley, and the trolleys are connected in sequence and pulled by the front of the vehicle. After the first slag tank 5 is filled with waste materials, the headstock pulls the trolley forward, and the second slag tank 5 is drawn to directly below the nozzle B4, and each slag tank 5 is filled in turn until the waste residue is cleaned up.

Preferably, the width of the roller belt conveyor A1 and the roller belt conveyor B3 is 1.2m.

Claims (8)

1. A waste material cleaning system in a large-scale blast furnace overhaul furnace is characterized in that it comprises a drum belt conveyor A, a nozzle A, a drum belt conveyor B, a nozzle B and a slag pot, and the drum belt conveyor A is arranged on the tuyere platform, and one end It extends into the air supply port of the blast furnace, and the bottom of the other end is in contact with the top of the nozzle A. The roller belt conveyor B is set on the platform of the cast iron factory. The lower end of the nozzle A is in contact with the top of the roller belt conveyor B. The bottom of the other end is connected to nozzle B, and the bottom of nozzle B is aimed at the slag tank. 2. according to the waste cleaning system in the large-scale blast furnace overhaul furnace described in claim 1, it is characterized in that, in the blast furnace, be provided with excavator A and excavator B, the working end of excavator A is a hydraulic hammer, and the working end of excavator B is The working end is a bucket. 3. The waste cleaning system in the large-scale blast furnace overhaul according to claim 1, characterized in that there are multiple slag tanks, and each slag tank is set on a trolley, and the trolleys are connected in sequence and pulled by the front of the vehicle. 4. The large-scale blast furnace overhaul furnace waste cleaning system according to claim 1, characterized in that the width of the roller belt conveyor A and the roller belt conveyor B is 1.2m. 5. Utilize the method for cleaning waste in the furnace of the large-scale blast furnace overhaul furnace waste cleaning system as claimed in claim 1, it is characterized in that, comprising the steps: 1) Put the waste in the furnace on the roller belt conveyor A, and the roller belt conveyor transports the waste to the nozzle A, and the waste is transported to the roller belt conveyor B along the nozzle A; 2) The roller belt conveyor B continues to transport the waste, and when it reaches the end, it slides off the nozzle B and falls into the slag tank. 6. The method according to claim 5, wherein an excavator A and an excavator B are arranged in the blast furnace, the working end of the excavator A is a hydraulic hammer, the working end of the excavator B is a bucket, and the excavator Machine A is responsible for crushing waste materials, and excavator B is responsible for transporting waste materials to the roller belt conveyor A. 7. The method according to claim 6, characterized in that the excavator A and the excavator B are separated from the operating room and the machine body outside the blast furnace, lifted from the inspection hole to the blast furnace in turn, and reassembled in the blast furnace. 8. The method according to claim 5, characterized in that there are multiple slag tanks, and each slag tank is arranged on a trolley, and the trolleys are connected in sequence and pulled by the front of the car, when the first slag tank is loaded After the waste is full, the front of the car pulls the trolley forward, pulls the second slag tank directly below the nozzle B, and fills each slag tank in turn until the waste is cleaned up.