TDW low carbon heat-insulating covering agent low carbon riser/feeding compound
Risers exothermic compound
•
一.physicochemical indexes
index Melting point（C） size（mesh） speed（S） Multiple moisture（%）
• parameter
1150-1500 <80 10 1.8-2.5 <2
specification SiO2 A12O3 C Fe2O3 MgO
% >35 >15 >20 >20 <5
二.action principle
the product increase the quantity of heat of the riser through its heat preservation and radiation itself. It can lengthen the crusting time and make the molten metal under the action of barometric pressure for a long time. With the solidifying contraction of the molten metal in the cavity, the molten metal in the risers anaplerosis to form feeding. At the same time, it is helpful for the gas evolution and impurities floating.
三. benefit and influence：
一、 save costs
二、 lowering reject rate，promotion of comprehensive benefits ;
三、improve casting yield and reduce energy consumption。
四. Usage and dosage
Diameter of Risers (mm) 200 250 300 400 450 500 550 600 650 700 750 800
• dosage(kg) 1 1.5 2 4 6 7 9 11 14 17 20 24
1 before use 2 3’s after using 3 burning and expansion
4 burning and expansion 5 burning and expansion 6 finish burning and expansion
1.Model
TDWFEX low carbon feeding compound is applicable to risers feeding steel casting which is sensible about carbon, it is made up of low carbon materials.
TDW FEX has two models 707 and 707F.
2.action principle
the product increase the quantity of heat of the riser through its heat preservation and radiation itself. It can lengthen the crusting time and make the molten metal under the action of barometric pressure for a long time. With the solidifying contraction of the molten metal in the cavity, the molten metal in the risers anaplerosis to form feeding. At the same time, it is helpful for the gas evolution and impurities floating.
3.TDWFEX feeding compound benefit and influence：
1, save costs
2, lowering reject rate，promotion of comprehensive benefits ;
3,improve casting yield and reduce energy consumption。
4. usage and dosage
Diameter of riser mm 200 250 300 400 450 500 550 600 650 700 750 800
Dosage kg 1 1.5 2 4 6 7 9 11 14 17 20 24
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