How To Judge The Quality Of Fire Clay Brick

Fire clay brick accounts for an important position in the refractory industry. The most important feature of fire clay brick is that the raw materials can be obtainded locally.
Fire clay brick is cheap and durable. It can be used for fire protection, thermal insulation, sound insulation and moisture absorption. Therefore, it is widely used in industrial production. The scrap bricks can be reused as aggregate.
When purchasing fire clay bricks, some professional knowledge is needed and some principles should be followed.
1) Take your need into account, such as specifications and materials.
2) Select appropriate manufacturers. Shop around and capare the price before you buy. Also pay attention to the credibility of manufacturers, after sales service, product quality and service attitude.
3) After selecting a manufaturer, give a visit to the factory to understand the strength of manufacturers, scale, production qualification, production capacity and evaluation on the product from other customers.
4) Pay attention to the proper use of fire clay brick in the production and the implementation of safety measures so as to make full use of fire clay brick, reduce unnecessary losses, extend the service life ansd reduce the cost.

How to select fused cast AZS block

Recently, with the development of furnace technology, more and more fused cast AZS block is used in the glass furnace. So, how to select fused cast AZS block?
1) fused cast AZS 33# block is used in the sidewall in contact with glass liquid. In the upper part of the sidewall, WS AZS 44# block is the best choice.
2) PT fused cast AZS is enough in the upper part of the glass furnace.
3) In the insulated bottom, fused cast AZS WS 33# is suitable as the paving block and can be used with AZS ramming mass during the construction.
4) PT AZS 33# block made by the reducing method is used in the sidewall, flat arch and oblique arch of the small furnace.
5) PT α—β fused cast alumina block is generally used in the sidewall of the refining zone, while WSα—β fused cast alumina block is used in the bottom. However, fused cast alumina block is expensive, so 33# AZS block is used as an alternative.

The size and specification requirements for hot stove fire clay bricks

Hot stove fire clay brick is made of refractory clay as the raw material. It is used in the hot stove, regenerator and partition walls. It is required to have good thermal shock resistance, high softening temperature and low creep rate.

China Metallurgical standard (YB / T 5107-1993) classifies the hot stove fire clay brick into RN-42、RN-40 and RN-36 3 according to the physical and chemical parameters.

There are the following provisions for the physical and chemical parameters and the allowable size deviation.

1) If the width is not more than 0.25mm, no limit to the length;

2) If the width is between 0.26-0.5mm, length should be no more than 30mm;

3) If the width is more than 0.5mm, not allowed.