Fireclay brick

Description

Fireclay brick is an aluminosilicate refractory made from chamotte, that is, pre-fired refractory clay, and bonding clay. After firing, the brick consists mainly of aluminium and silicon oxides; the more Al₂O₃, the higher the grade and service temperature. Under GOST 390-96 the main grades are ShA, ShB and ShAK (ША, ШБ, ШАК). For rotary kilns, GOST 21436-2004 covers fireclay grades ShTsU (compacted) and ShTsS (medium-density), in Russian ШЦУ and ШЦС. The brick comes in several density classes: the denser the product, the better it resists gases, dust and abrasion.

Fireclay handles temperature changes and abrasion well, is not affected by moisture in storage and is easy to cut to size on site. It is not designed for contact with basic slag and clinker melt; magnesia products are used for that. For areas up to 1250–1400 °C, however, it is a reliable and the most widely used lining option. It is inexpensive, so fireclay is also used for the safety lining behind magnesia and carbon-containing brick.

Applications: the inlet and preheating zone of rotary cement and lime kilns, fireboxes and brickwork of CHP and boiler-house boilers, flues, the roof and upper walls of submerged arc furnaces, alloy and slag ladles, and general-purpose masonry. Grades ShA and ShAK work up to 1400 °C, ShB up to 1350 °C. In cement kilns with high alkali content in the gas, it is better to use compacted fireclay ShTsU: alkalis penetrate dense brick less.

We supply straight brick 230×115×65 mm, end and side wedges and products to drawing. The brick is laid with MSh fireclay mortar. Fireclay brick is not damaged by moisture, but it is best stored on pallets under a canopy so that it does not get wet before laying. We will select the grade for the temperature and conditions of your unit and deliver the brick together with the mortar in a single shipment.

Technical data