1. Preparation before going to work:

1.1 Dressed neatly, labor protection products are fully worn.

2, ingredients:

2.1 According to the ingredients card, the raw materials are matched.

2.2 Check if the furnace frame can be filled.

3. Induction melting furnace feeding

3.1 Flatten the bottom of the furnace with a feeder to avoid adding or not feeding, and be careful not to block the burner and not directly hit the bottom of the furnace.

3.2 The vertical furnace mouth feeds the aluminum ingots neatly, and after the aluminum ingots are melted, the materials are continuously fed to form a continuous melting feed.

4. Ignition:

4.1 blower door fully opened purged with 3 - 5 minutes, the furnace no fire ignition is required to prevent run tightly closed fire door.

4.2 If the furnace or the furnace is ignited, use an open flame and raise the temperature. If the furnace is shut down for 5-7 days, the temperature is raised uniformly for 8 hours, and the temperature reaches 800 °C. If the furnace is stopped for more than 10 days, it is required to heat up for 24 hours. Temperature reaches 800 ° C

5. Melting :

5.1 When melting , it is necessary to check the aluminum outlet of each furnace frequently to see if there is any aluminum or aluminum running.

5.2 When the aluminum is liquefied to a certain height and the temperature reaches 700-750 degrees, the iron content in the primary aluminum is sampled and analyzed, and the slag is simultaneously removed.

5.3 After the analysis results are to be sampled, if it is qualified, it will be transferred to the holding furnace. If it is not qualified, it should be transferred to the holding furnace to adjust the composition of the holding furnace.

6. Prepare before transferring to the holding furnace:

6.1 The industrial silicon is first put into the holding furnace before the flow, and then put into the middle of the titanium. If the sampling and analysis results are qualified, the remaining aluminum ingots are directly input; if it is not qualified, the aluminum ingots are adjusted according to the appropriate amount.

6.2 Start the electronic scale, the total weight of all raw materials put into the holding furnace before the transfer. According to the actual situation, determine the weight of the transferred aluminum liquid.

7, converter:

7.1 must be operated by a special person

7.2 Converter personnel must wear a mask to prevent aluminum liquid from collapsing and scalding.

7.3 If the flow rate of the aluminum liquid is too fast during the converter, the plug should be pressed against the upper part of the water discharge port to prevent the aluminum liquid from being splashed and burned.

7.4 Immediately block the aluminum transfer port after the aluminum liquid in the furnace to be insulated reaches the production requirements.

7.5 Clean the inlet of the holding furnace.

8. Insulation furnace operation:

8.1 When the temperature of the holding furnace reaches 750 °C - 780 °C, the fire is stopped and the furnace door is opened.

8.2 Start the permanent magnet stirrer for 10-15 minutes, adjust the weak, medium and strong three-speed control speed at any time to prevent the aluminum liquid from overflowing. After the stirring is completed, withdraw the permanent magnet stirrer.

8.3 Whether the industrial silicon in the aluminum liquid is completely dissolved by the large sputum. After the melting, the sample is analyzed to determine whether the calcium content is qualified. If it is qualified, the next step is passed, and the calcium removal agent is used to remove the calcium.

9, refining:

9.1 Observe the amount of scum on the surface of the aluminum liquid, and increase or decrease the proportion of the refining agent according to the specific amount. The normal addition ratio of the refining agent is 2:1000.

    9.2 Deslagging refining time is 5-10 minutes,

9.3 After the slag refining is completed, the corresponding auxiliary materials are added. After the added auxiliary materials are melted, the slag is removed.

9.4 Stir after the slag is completed, and the stirring time is 5-10 minutes.

9.5 After the completion of the agitation, the sample is analyzed and analyzed. After the components are qualified, the degassing refining is carried out, and if it is unqualified, it is adjusted.

9.6 Degassing refining time is more than 20 minutes. If the weather is wet, the refining time will be delayed according to the situation.

9.7 After degassing refining for 10-15 minutes, samples were taken for pinhole analysis. If it is qualified, prepare for the next step. If it is unqualified, continue to degas until the pinhole is qualified.

10. Preparation before casting

     10.1 The preheating distributor reaches about 300 °C, and the time is long in winter and short in summer, which is suitable for the time.

     10.2 The casting temperature needs to reach 650-660 °C.

10.3 Adjust the temperature of the aluminum liquid in the furnace. If the temperature of the aluminum liquid in the furnace is higher than the casting temperature, add the waste and stir for 3-5 minutes; if the temperature of the molten aluminum in the furnace is lower than the casting temperature, the temperature is raised to the casting temperature.

     10.4 Casters must wear a protective mask.

11, casting:

11.1 The speed of the casting machine depends on the flow rate of the aluminum discharge liquid and is adjusted to the appropriate level.

11.2 The casting machine is cooled after one week of operation.

11.3 The plug is attached to the upper edge to prevent splashing of aluminum liquid.

11.4 The name and label of the beater are prohibited. It is forbidden to tap the casting mold.

11.5 The car is placed in a suitable position, and the ingots are placed immediately to prevent the aluminum ingot from breaking the casting machine.

Pay attention to the placement of the car.

11.6 Replace the prefix quickly and accurately

11.7 Place the aluminum ingot at the specified location to cool down.

11.8 Aluminum ingots are not allowed to exceed the height of one ingot; the surface is not allowed to have burrs or flashes, and the weight requirement is controlled within 6±0.5Kg.

12, packaging:

12.1 After the qualified product is qualified, it is packed with PET tape and packing pliers.

12.2 Check whether the batch number of the aluminum ingot is clear, and handwriting the serial number, check the storage, and the weight range is controlled within ±50Kg.