How to operate concrete batching plant is a concern of many practitioners. This article tells us how to operate concrete batching plant from two aspects: the operation process of a concrete mixing plant and the workflow of a batching plant.
A concrete batching plant is equipment that combines various ingredients to form concrete. Some of these inputs include water, air, admixtures, sand, aggregate (rocks, gravel, etc.), fly ash, silica fume, slag, and cement. A concrete plant can have a variety of parts and accessories, including: mixers, cement batchers, aggregate batchers, conveyors, radial stackers, aggregate bins, cement bins, heaters, chillers, cement silos, batch plant controls, and dust collectors.
Concrete batching plant is required to be operated by personnel who are familiar with the structure, performance and process of the plant, and who have been strictly tested and obtained the “operation certificate”. The operator should be familiar with the operating procedures and maintenance procedures of the batching plant.
How to operate concrete batching plant？ How does a concrete batch plant work？
Concrete Batching Plant Operating Procedures
First, check and prepare before starting:
- Check whether all switches in the distribution cabinet are closed.
- Check whether the emergency stop button and belt of batching plant are normal.
- Check whether there is material in the hopper.
- Check whether the mixer oil storage tank has oil.
- Check whether the aggregate, powder, water, admixtures and other raw materials are enough.
- Check whether the raw material conveying and the material scale are normal.
- Check whether the console buttons and indicators are normal.
Second, start and run operation.
- Turn on the electric power supply, start the air compressor, turn on IPC power supply, start the control system.
- According to the laboratory issued by the “mix ratio notice” to establish the task and verify the matching ratio.
- After confirming the batching station, belt machine, mixer and screw conveyor are not operated, ring the bell three times to start the mixer and belt machine.
- To issue the mix ratio and verify it again.
- Trial production. According to the trial production samples by the laboratory to adjust the ratio to start production.
- Operators should concentrate on correcting the weighing error, the whole car square quantity and over-difference at any time during the production, and pay attention to data preservation.
- Ring the bell once after putting the last tray of material. If there is no production task within five minutes, the mixer should be stopped.
Third, washing machine operation.
- The mixer should be cleaned at the end of production or if the mixer is stopped for more than half an hour.
- The mixer can be cleaned manually or automatically, but it is strictly forbidden to scale water over the range of scale.
- When releasing the water, it must be confirmed that no one is at the downcomer and the bell is rung once.
Fourth, the shift handover.
- After the continuous production of the mixing plant exceeds 8 hours, the operator must hand over the shift.
- Operators must fill in the handover record when they change shifts.
- The person on duty must give production instructions to the person is going to be on duty, if necessary, in written form.
Batching Plant Maintenance Operating Procedures
First, operation in the mixer
- The operation must be done by two or more people, and a guardian must be set up.
- Access to the mixer must be approved by the department manager.
- Informing the control room before entering the mixer.
- Pull the 1 #, 2 # motor inclined belt, motor circuit breaker, and hang the “manned operation” sign.
- Press the emergency stop switch.
- It is strictly forbidden for outsiders to enter the machine room when the mixer is in operation, and the operator cannot operate the console arbitrarily.
- The guardian is strictly forbidden to leave the site while this operation is not completed.
- When there is a cement block in the machine, it should be removed manually.
Second, screw conveyor maintenance
- The operation must be done by two or more people, and a guardian must be set up.
- Operators must fasten the safety belt and take the necessary safety precautions when working at height.
- Pull down the cement and pulverized fuel ash spiral motor circuit breaker and hang the signage.
Third, operate concrete batching plant and inclined belt machine
- Inform the control room before entering the above places.
- Press the batching station emergency stop switch before entering the batching station.
- The corresponding main air line should be closed and deflated before maintaining the pneumatic components.
- The sensor should be short-circuited when welding operations are carried out on the scale.
- Wrap the cylinder with wet cloth first when implementing electric welding operation near the cylinder.