The powder raw material conveying system is composed of iron powder pneumatic conveying system and strontium carbonate pneumatic conveying system, which is mainly composed of hopper scale and batching-metering screw. According to the pre-set feed amount, the batching-weighing controller and PLC start the batching-metering spiral to add iron powder or strontium carbonate into their respective hopper scales according to a certain feed speed. After weighing, the iron powder or strontium carbonate is distributed on the aggregate screw machine and mixed in the mixer. At the same time, the small material system according to the pre-set feeding amount, feeding sequence, The batching-weighing controller and PLC start the batching-metering spiral to add the small materials A, B, C, D(up to 4 kinds of small materials can be configured) to a hopper scale respectively according to a certain feeding speed, and then add the iron powder and strontium carbonate cloth to the spiral machine through the mixing spiral, and the iron powder and strontium carbonate together into the mixing machine. When all the material in the weigher is empty, the next batching process is carried out.

The iron powder pneumatic conveying system first starts the automatic sending button, the return valve automatically opens, and then the feed valve and the tight air valve automatically open. After the system receives the open position signal of the feed valve, the feed screw starts and the bin pump begins to feed. Before the high level signal of the bin pump appears, the screw will work until the bin pump reaches the high level, and the operation panel displays the high level status of the bin pump. When the material level of the bin pump is high, the screw stops, the feed valve, air tight valve and air return valve are closed, when the feed valve and air return valve close signal reaches the system, the intake valve opens, the bin pump takes in air, after a delay of a few seconds, the boost starts to work, and the transmission starts, when the pressure of the bin pump is reduced to the set value (low pressure), the delay of a few seconds, the bin pump sends the end, the intake valve is closed, and the boost is closed. After the delayed air return valve is opened, the system enters the next transmission cycle after a delay of 4min. If you press the stop button in the process of sending and waiting, the system will not enter the next send cycle; Press the emergency stop button in the process of sending and waiting, and the system will stop sending or discharging immediately.

The strontium carbonate pneumatic conveying system is transported to the vicinity of strontium carbonate bag-opening station by electric hoist or forklift, and the material is fed into the bag-opening bin by manual bag-opening. First start the automatic send button, the bin pump feed valve and return valve open, when the system detects the feed valve open signal, screw start; At the same time, the vibration bucket of the bag opening station starts, and the bin pump starts feeding. When the bin pump is high, the feeding screw stops and the vibration bucket stops at the bag opening station. The feed valve of the bin pump is closed, the return valve is closed, the system detects the close signal of the return valve and the feed valve and enters the air valve. After a delay of 2S, the boost and the vibration bucket of the bin pump run, and the air pressure of the bin pump rises. When the transmission of the bin pump ends, the air pressure drops to close to zero, the transmission ends, the intake valve of the bin pump closes, the boost and vibration bucket stop, and the transmission ends. After 5S delay, the return valve opens, and the next cycle begins after 2rain delay. Press the stop button in the process of sending, the next cycle will not be carried out after the end of sending; Pressing the emergency stop button in the process of sending will stop all devices immediately.