Recent Operational Improvements of Hematite Plant …
875
Fig. 9 Zinc content transition
Fig. 10 Water content transition
3. The de-arsenic process filter was renewed from filter press to vacuum filter in
order to solve the quality problems of liquefaction and agglomeration of copper
arsenide residue.
These improvements led to stable operation of hematite process and then securing
of stable zinc production.
In order to increase zinc production in the future, further increase in zinc leach
residue treatment will be required, so we will continue to work on it as a continuing
issue.
Acknowledgements I greatly thank Akita Zinc Co., Ltd. and Dowa Mining Co., Ltd. for granting
permission to publish this paper. And I also would like to express appreciation to Mr. Togashi and
Mr. Kanno. Their assistance was critical to this paper.
875
Fig. 9 Zinc content transition
Fig. 10 Water content transition
3. The de-arsenic process filter was renewed from filter press to vacuum filter in
order to solve the quality problems of liquefaction and agglomeration of copper
arsenide residue.
These improvements led to stable operation of hematite process and then securing
of stable zinc production.
In order to increase zinc production in the future, further increase in zinc leach
residue treatment will be required, so we will continue to work on it as a continuing
issue.
Acknowledgements I greatly thank Akita Zinc Co., Ltd. and Dowa Mining Co., Ltd. for granting
permission to publish this paper. And I also would like to express appreciation to Mr. Togashi and
Mr. Kanno. Their assistance was critical to this paper.