Question

Which of the following sands can be used as a substitute for minimizing the dust particles in the foundry?

(a) Core sand

(b) Silica sand

(c) Olivine sand

(d) Quartz sand

I have been asked this question in exam.

I want to ask this question from Dust Measurement and Sampling topic in section Foundry Environment Health & Dust Problem in Foundries of Casting-Forming-Welding I

Answer 1

Correct option is (c) Olivine sand

To explain I would say: It can be essential to substitute less hazardous sand such as olivine sand which can reduce free silica concentrations and thus minimize the dust particles in the foundry. In this case, local exhaust ventilation must be provided at the mixing or mulling period as the sand used in the foundry is dry.