Refractories for iron and steel furnace

Since the 21 century, the production line of the rapidly expanding, together with changes in coal quality, as well as the influence of environmental protection and a series of conditions, some large and medium-sized pre collapse kiln during the production process, especially the basicrefractories by different degree of damage, affecting the steel furnace operation cycle, has become an important condition control steel kiln operation rate.

Now, heavy pre collapse kiln (Nissan and over 5000 tons of furnace) basicrefractory material used, its important commodities magnesia spinel brick, magnesia chrome brick, dolomite brick and magnesia zirconia brick series, while the domestic mainly magnesia spinel brick and magnesia chrome brick.

1. magnesia spinel brick

Magnesium spinel refractory brick common is the use of pre spinel and combined magnesium material synthesized by mixing, forming and firing is made, another way is to add compound aluminum in magnesium compound, during sintering synthesis of spinel. The greater use of the market is made first modes of spinel brick; the brick has good thermal shock stability, thermal chemical corrosion of high ability, important for transition zone.

2. magnesia chrome brick

Direct the conclusion of magnesia chrome brick has high temperature resistant performance good, SiO2 corrosion resistance and anti chemical reduction effectiveness. High intensity and have high and anti stress ability of the machine, coating with good performance, many used in the sintering zone.

3. magnesium dolomite brick

Magnesium dolomite brick is the raw material through organic concluded agent forming and firing. Magnesium dolomite brick has the following advantages: with the chemical stability and the gas of iron and steel clinker; high refractoriness; easy to hang and kiln crust; the price is cheaper. So, in foreign magnesium dolomite brick with more, but it is more easily liquefied.

4. magnesia zirconia brick

Magnesia zirconia brick has good using prospect, but because of the high cost, the spread was limited.