1. This produced refractory bricks , used to line furnaces. 2. In the first tens of years the furnace lining was of refractory brick . 3. During this time the structure, built of refractory bricks , absorbs the heat. 4. Refractory bricks are designed in several layers.5. Each has a single outer shell made of welded steel lined inside with refractory brick . 6. Special Unshaped Refractories and Unburned Refractory Bricks . 7. Lmura has a mixed economy, with the manufacture of refractory bricks as a major industry. 8. The northern structure was constructed of yellow refractory bricks with single coarse brick walls spaced at regular intervals. 9. The semisubterranean walls of these furnaces were lined with refractory bricks and had bottoms made of refractory clay. 10. During the 1800s the Loxley Valley became an important producer of refractory bricks for the expanding Sheffield steel industry.
