Question

Repeated freezing and melting of fire clay can improve the plasticity of the clay material.

(a) True

(b) False

I have been asked this question in an online quiz.

I'd like to ask this question from Fire Clays, Illite and Kaolinite in division Molding and Core Sands of Casting-Forming-Welding I

Answer 1

Correct option is (a) True

The best explanation: First the fire clay is taken to the processing plant and then weathered for a long period of time, depending on the type of fire clay. Freezing and melting break the clay material and results in improved plasticity. Then the clay material is crushed and dried in mechanical dryers to remove the moisture content. Mostly, the rotary dryers fired with natural gas are used for drying the fire clay.