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Charge the furnace with Raw Material and start firing. |
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| Check the Molten Bath for Contamination |
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| Check for Ag, Bi and other impurities in lead bath which must be below customer requirement. |
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Take out proportional Quantity of molten lead out of pot and add other material containing low content of impurities. |
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| Check for Sb, Sn, As, Cu , Cd and other impurity. |
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| Take out proportional Quantity of molten lead out of pot and add other material containing low content of impurities |
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1. De-Cu, De-Cd
2. Removal of Black Dross |
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1. Quality Control (Sample Test on Spectrometer)
2. Maintain the Composition of Bath As per Customer |
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Add calculated Quantity of Sb or its master alloy keeping Stirrer in rotation and keeping the Temperature constant. |
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Take Sample after adding 75% of each Master / Pure Alloy. Calculate the Remaining as per analysis report and add balance quantity in one or two stages. |
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Add calculated Quantity of Sn or its master alloy keeping Stirrer in rotation and keeping the Temperature constant. |
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| Take Sample after adding 75% of each Master / Pure Alloy. Calculate the Remaining as per analysis report and add balance quantity in one or two stages. |
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Add calculated Quantity of As or its master alloy keeping Stirrer in rotation and keeping the Temperature constant. |
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Take Sample after adding 75% of each Master / Pure Alloy. Calculate the Remaining as per analysis report and add balance quantity in one or two stages. |
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After setting of all elements within Spec. except Se, add Se Master Alloy or its Pure Form very cautiously & gradually keeping stirrer in rotation. |
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1. Stir the bath to ensure well homogeneous mixture of lead bath.
2. Skim off the Dross. |
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1. Take Sample of Se Master / Pure Alloy.
2. Calculate the Remaining Quantity of Se Alloy as per analysis report and add balance quantity in one or two stages. |
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1. Quality Control (Final Sample Test on Spectrometer).
2. Maintain the Composition of Bath As per Customer Specification. |
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1. Ingot Casting
2. Regular Sample Checking. |
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| Take Sample after every 200 ingots including first and last. |
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| Take final analysis report from Quality Analysis Lab. Containing No. of Ingots, Lot no., Name of Customer & Product. |
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1. Packaging/Stacking/Color Coding
2. Warehousing |
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