In a word:
Recycle the refractory materials
by decomposing them.
The type of refractory materials used in a furnace
differs by the position. All kinds of used refractories mixed together make it
hard to keep good quality, so it is necessary to classify refractories before
reusing them. They can be classified by magnesia, alumina, carbon-based,
non-carbon-based.
In addition, for the dissimilar materials or
iron mixed in, we can use some ways to pick them out, such as the method of
magnetic separation. First, the used refractory materials should be crushed to 200mm ~
400mm , and then reduce to smaller than 20mm after impacting, compression or
snipping, so as to be easy used.
For the refractories
mixed with iron, we can use the way of electromagnetic separation, on the
effect of magnetic strength higher than 12000 GS, making the content of iron in
the used refractories with the size of 5~10mm
less than 2%. While reusing the slit after crushing and after removal of iron
powder as raw materials, we should classify them by particle size. The classification
is generally done by using some metal mesh sieves, put the large mesh screen in
the above and the small mesh screen under the large ones, keep continuously
screening. In the process of crushing, grinding and classification, we should notice
that not let the dust spread, sealing the device and recycling refractories in duster. The left
dust also can be added to raw materials of landscape bricks.
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