Parameters

Rubber grade

Ceramic grade

Feed grade

ZnO

≥99.7%

≥99.7%

≥99.7%

Zn

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≥80.2%

Pb

≤0.037%

≤0.037%

≤0.005%

Cd

---

---

≤0.001%

As

---

---

≤0.001%

Mn

≤0.0001%

---

---

Fe

---

≤0.01%

---

Cu

≤0.0002%

---

---

Insoluble matter in HCl

≤0.006%

≤0.02%

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Water soluble matter

≤0.10%

---

---

Volatile matter at 105°C

≤0.30%

≤0.2%

---

Loss on ignition

≤0.20%

≤0.2%

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Residue on 45 μm sieve

≤0.10%

≤0.10%

---

Residue on 150 μm sieve

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≤1%