1.Low thermal conductivity, 2.Good thermal insulation performance. 3.Good integrity with furnace lining Tyical features: High compressive strength in normal temperature, high ability for anti-abrasion during work, low shrinkage degree under high temperature so as to maintaining an integrity of the furnace lining; low apparent porosity, and fe2o3 content to reduce the carbon deposit in the blowhole and avoid the bricks broken in case of expansion; seldom melting point settings shape. Fireclay bricks are divided into different kinds which are mainly as below: (1) normal purpose fireclay bricks (2) fireclay bricks for coke oven (3) fireclay bricks for blast furnace (4) fireclay bricks for hot-blast stove (5) glass furnace bottom fireclay blocks (6) lower porosity fireclay bricks. In plastic sheets or in wooden pallets