In a study of the blast-furnace process what is of particular interest is the behaviour of the slag from the time it enters the zone of fusion until it is flushed from the slag-notch. In passing ...

Up to 1709, furnaces could only use charcoal to produce iron. However, wood (which is what charcoal is made from) was becoming more expensive, as forests were being cleared for farmland and timber.

In the blast furnace, it is so hot that ... impurities in the haematite, to produce slag – which is calcium silicate. This is separated from the iron and used to make road surfaces.

A blast furnace combines iron ore and metallurgical coal at high temperatures to produce molten iron — the raw feedstock for steel. Over time, the brick lining inside the furnace and the water ...

The last blast furnace at one of the biggest steelworks ... put in the top of the furnace – to make sure the slag formed on ...

Tata had said the blast furnace was expected to close in ... to make sure the slag formed on top of the iron is the right ...