Slag vertical mill expertiseDate: 2019-07-09 Views:
The reason why it is called “process equipment technology plan” is to explain the equipment configuration, equipment performance and equipment control plan together with the description of the process plan.
In other words: not only the process, but also the equipment, but also in detail.
A slag powder vertical mill production line can usually be divided into the following subsystems:
1, raw material system, 2, returning system, 3, mill system, 4, powder collection system, 5, finished product storage and transportation system, 6, lubrication hydraulic system, 7, hot air system, 8, electrical automation system, 9, public Auxiliary system.
First, the raw material system.
The raw material system includes a storage yard, a metering feed, and a grinding device.
1, raw material storage
1.1. Set up a closed shed yard.
At present, environmental protection standards and requirements are getting higher and higher. Large-scale bulk materials are piled up in the open air. Sooner or later, they will be banned. Instead of being rectified and shut down at that time, it is better to take the first step and build a high starting point. It depends on the owner's ideas and environmental awareness.
In fact, many raw material storage yards for slag powder production lines have been built closed shed yards a few years ago, and they are still very beautiful. The following picture shows a closed yard with a capacity of 50,000 tons. There are direct supply and unloading, buffer discharge. The fabric is piled up and the design is perfect.
1.2. The ground of the yard is hardened and leakproof, and the surrounding drainage system is designed.
1.3. Set 2+1 steel underground receiving hopper, feed the raw materials into the receiving hopper through the loader, and the volume of each receiving hopper is not less than 1h.
1.4. The top surface of the hopper is 100~200mm above the ground. The design of the gentle slope is designed with a mesh screen. It has sufficient strength and strong support to meet the loader's walking and unloading. Generally made of δ16mm steel plate, H200mm, net hole distance 120×120mm
1.5. Set the vibration motor at the corner of the grid screen and protect it. On-site manual control + loader driver remote control.
2, measurement loading
2.1. Each steel receiving hopper side wall is provided as a bracket, and each side is horizontally mounted with a vibration motor.
The vibration motor is automatically controlled by the feedback of the measuring belt (10% automatic starting below the given amount) + remote central control manual control + local manual control.
2.2. Set 1000×800mm bar valve under the hopper (different output size configuration), adjustable discharge slip, the discharge width is not more than 2/3 of the effective width of the measuring belt, the opening is reasonable, when designing the load feeding amount, The running frequency is about 35~40Hz.
2.3. The metering belt is set up with one set, the weighing range is 1.5 times of design output, and the measuring accuracy is ≤1%. A metering belt with a 50% design output is provided for the addition of accessories.
2.4. It is possible to install a 2-stage self-unloading iron remover at the end of the loading belt, and make a chute and scrap iron temporary storage bin.
2.5, in order to reduce the land occupation, the feeding belt angle is large, usually in the limit of 16 ° design, so the belt speed is designed according to ≥ 1.25m / s, configuration of the check device, electric roller brush cleaner, light weight 2 level deviation The switch, the rope switch, and the slip switch are sequentially numbered and sprayed according to the left and right positions, and enter the central control record, alarm, and jump machine respectively.
2.6. The belt is fed into the rotary screen, the qualified raw materials are fed into the feeder, and the sieve is temporarily stored in the waste bin.
2.7. Set the belt corridor, the channels on both sides, have sufficient strength, and set the window and ventilator according to the building standard.
2.8. A powerful exhaust fan is installed at the end of the pit.
2.9. The 3% slope of the ground pit is drained to the surrounding area, the drainage trough is arranged around, and the collecting well is set at the end (not less than 800×800×500), and the fixed automatic control sewage pump is set.
2.10. Both sides of the slope of the pit are inclined steps and the ground is smeared.
3. Grinding device
In the second chapter "Classification of Vertical Mills", vertical mill feeds are divided into two types: center feed and side feed. As a slag mill, avoid the selection of center feed vertical mill.
3.1, the raw material into the grinding to take the side feeding, the center vertical blanking method. The center blanking device is provided with a separate blanking pipe, which is isolated from the raw material returning cone cone blanking pipe of the classifier (double casing design) to avoid the condensation and blocking of the dry and wet mixing.
3.2, the inner tube is made of thick-walled wear-resistant material + wear-resistant ceramic.
If it interferes with the overlay welding drive, it is detachable in 2 sections.
3.3. The preferred tubular screw conveyor for the lock-in grinding device. It is guaranteed that no wear and tear will occur in a running year (8000h), and no leakage will occur, which will affect the mill output.
3.4. The grinding device sets the running detection and enters the central control display and alarm.
The front and rear bearings are lubricated with intelligent concentrated dry oil.
3.5. The grinding device has two channels leading to the grinding roller platform and the return frame.