The quality of zirconium concentrate varies with resources, and there is no international standard. Therefore, the companies or manufacturers of each producing country have their own standards according to their resource characteristics and user requirements. The national standards for zirconium concentrate in China are shown in the table below.
Table National Standard for Zircon Concentrates in China
level | chemical composition,% | Particle size mm | |||||
(Zr, Hf)O 2 | Impurity content | ||||||
TiO 2 | P 2 O 5 | Fe 2 O 3 | Al 2 O 3 | SiO 2 | |||
Premium product | 65.50 | 0.3 | 0.20 | 0.10 | 0.3 | 34 | -0.4 |
First grade | 65.00 | 0.5 | 0.25 | 0.25 | 0.8 | 34 | -0.4 |
Second grade product | 65.00 | 1.0 | 0.35 | 0.30 | 0.8 | 34 | -0.4 |
Third grade | 63.00 | 2.5 | 1.50 | 0.50 | 1.0 | 33 | -0.4 |
Fourth grade | 60.00 | 3.5 | 0.80 | 0.80 | 1.2 | 32 | -0.4 |
Five grade | 55.00 | 8.0 | 1.50 | 1.50 | 1.5 | 31 | -0.4 |
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