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Metal as a group of elements is applied in the refractory, besides the effect of reinforcing and toughening matrix material, and it has the effect of plastic molding, promoting the sintering and oxidation resistance.

Plastic molding: Metal in the stress of the lattice will be a slip which has the plastic molding, so putting the metal into refractory will make the higher density product than that without adding metal samples under the same forming pressure.

zircon brick is a refractory brick which is made of natural zircon sand. Zircon brick is made through sintering by single zircon, and zircon brick can as well be made by adding proper sintering agent into zircon which is as the main raw material. Zircon brick belongs to acid refractory with the properties of strong resistance to slag, lower thermal expansion ratio which will decrease with the temperature increase, high refractoriness under load, high wear resistance and good thermal shock resistance.

Generally, industrial zircon sand is grains of sand shape whose grain size is about 0.1 ~ 0.2mm, and it can’t be used to produce refractory brick directly. In

order to adjust the grain’s composition of refractory bricks and reduce the sintering shrinkage, two stage production method is usually adopted which is by

making zircon sand and fine powder into clumps in advance, then calcining under the decomposition temperature of zircon brick, and then crushing the

The main materials of glass furnace are zirconium corundum, because the production of zirconium corundum is smooth, which is suitable for producing glass and other products. However, during the use of glass furnace, occasionally there will be some abnormal conditions, below are some methods to handle abnormal operations.

1. Abnormal pressure of glass furnace

Correct and effective masonry method of refractory not only can prolong the service life of glass furnace, but also can eliminate some stress caused by premature damage. Wrong masonry method of refractory can greatly shorten the service life of refractory materials. The glass refractory usually refers to the high temperature bricks which can be used in liner of glass furnace, such as zircon brick, fused cast azs block, fused cast zirconia block, silica brick, magnesia brick, mullite series brick, etc.

ZrO2 in zircon brick is about 65% which is almost composed of zirconite crystals and contains only a very small amount of glass phase and free ZrO2. The ture density is about 4.55g/cm3 or so, and the maximum ture density can reach 4.62 g/cm3. The bulk density of zircon is between 3.6 g/cm3 and 3.8 g/cm3, and apparent pososity is above 13%.

Wear resistance is a mechanical wear ability to resist solid, liquid and dust. In many cases, the damage caused by the mechanical wear of the firebrick surface is often very serious. It is often the direct cause of the working surface loss of a firebrick material. Sometimes, it is more harmful than chemical erosion. For instance, the firebrick liner of superstructure of glass furnace often loss due to lack of wear; the place of air flow scour and melting flow of furnace is also easy to loss due to low wear resistance of firebrick. So, wear resistance of firebrick is an important property.

Refractoriness is different from melting point, melting point is the balance temperature that materials reach to melting point which is between solid and liquid crystal, however, refractoriness is a process in which the solid phase of the material is gradually dissolved in the liquid phase and finally is melted with the increasing temperature.

There are thousands of refractory manufacturers who can manufacture zircon brickat present market. However, what are the standards to measure a good zircon brick manufacturer? Now Zhengzhou Sunrise Refractory Co., Ltd. as a professional refractory will give some advices from the following aspects for your reference.

After the ordered zircon brick are finished producing, whether you think, as a manufacturer, we can pack the zircon brick and deliver them to customers, in fact it is not like that, before packing, there is another important work we need to perform, that are inspection and pre-assembly which can adjust and optimize the dimensions of each brick.

About inspection