How to be a qualified asphalt mixing plant operator? First of all, the operator should be proficient in the structure and working principle of each part of the mixing plant. On this basis, strictly control the details of each production, especially the metering system, because the quality of the metering work directly affects the asphalt mixture. Technical indicators.
For stone measurement systems, it should be noted that:
1. Keep each discharge door open and close flexibly and quickly;
2. All discharge openings should be kept clear, and there should be no sediment, to ensure that the stone can flow down quickly and evenly during the measurement;
3. All discharge doors should be closed in a timely manner and sealed well. There should be no material leakage at the end of single material measurement;
4. Keep the aggregate weighing hopper clean and free of foreign objects to avoid jamming. Make sure that the aggregate weighing hopper is completely suspended at all times.
5, each aggregate load cell, the preload should be balanced, the force should be consistent, the induction should be sensitive.
For powder measurement systems, the following points should be noted:
1. Keep the powder conveying pipeline unblocked, and there must be no blocking phenomenon;
2. The feeder or valve should be sealed tightly and practically at the end of the measurement; powder cannot be leaked;
3. Frequently remove dust and debris on the powder measuring bucket to keep it clean;
4. The entire metering system must be well sealed to prevent the powder from being damp and agglomerated;
5. The powder material should be completely discharged, and there must be no residual powder in the scale. The discharge door must be closed tightly. No powder should be leaked during measurement.
For asphalt metering systems:
1. Before starting production, the pipeline must be fully heated to ensure that the asphalt temperature in the system reaches the specified value;
2. The asphalt spraying pipeline must be clean and unblocked, and the nozzle part must not be blocked, otherwise the spraying will be uneven and affect the mixing effect;
3. The asphalt spraying pump or valve should be closed tightly to ensure that there is no dripping after the asphalt spraying is finished;
4. Asphalt metering switching valve must be accurate, timely and well sealed, and the asphalt metering bucket must be firm and flexible.
For the entire metering system of the asphalt mixing plant, the operator must check frequently. Check whether each weighing scale is completely suspended, whether there is a stuck phenomenon, check whether each load cell works normally, and whether the sensing is sensitive. Check regularly to make the displayed value consistent with the actual value. If problems are found, they should be resolved in time to ensure that the metering system is in good working condition at all times.
CN
MM
EN
AR
December 5th, 2019 
