Before you read an Oreck XL air purifier review, you should know that the EPA estimates that 23 million people in the United States suffer from asthma, and indicates that it is one of the most common serious chronic diseases in children.
- Purifier Grid.
On its way from the blast furnace to the converter or open hearth furnace the pig iron is often passed through a great reservoir called a " mixer," which acts also as an equalizer, to lessen the variation in composition of the cast iron, and as a purifier, removing part of the sulphur and silicon.
Internally, each purifier is filled with ranges of wooden trays or sieves A, made in the form of purifiers.
9), and covered with the purifying material B to a depth of about 6 in., the number of tiers and size of purifier boxes being proportional to the quantity of gas to be purified.