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Quartz sand quality required

Time: 2013-08-27 16:55:27     

The quality of raw material is effect the slabs quality directly, so selecting the raw material is very important.

2.1 Quartz Powder

1) Size: 325 mesh or 400 mesh

2) Whiteness: 95 or >95 

3) SIO2 content: >=99%  

2.2 Quartz Grain

When it is with sufficient hardness, any colors, any appearances, any grits of quartz powder can be used as raw material (girt less than slab’s 1/2 thickness), high pure quartz can produce pure slab such as pure black slab, pure super white slab, etc.

2.2.1 Quartz grain Size:3—5mesh,5—10mesh,10—20mesh,20—40mesh,40—60mesh,60—120meshforeign country use the ‘mm’ unit 
2.2.2 Color and Impurity Requirement

1) Common Quartz Grain: little off-white weathering grain, black and brown grain the fewer, the better

2) High quality Quartz Grain: put the quartz on plane, black or other color grain particle number should be ≤1Per 1m2 (can reach to this standard by hand)

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