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1. Because of using zinc hydrometallurgy process of jarosite process, the leaching rate of zinc may reach 97% and this line can produce high quality zinc continuously and steadily.

2. Most iron can be removed through jarosite process. The content of zinc sulfate can reach more than 98% by evaporating , cooling, crystallization and centrifuging.

3. The industrial tests show that the jarosite process can be used to handle the zinc calcine with high concentration of Sb by controlling the leaching rate of Sb in the neutral leaching process.

4. Jarosite is a major secondary mineral formed in acid supergene environment by oxidation of metal sulphide.

5. The main metal minerals include limonite, hematite and jarosite, and the gangue minerals are dominated by quartz, feldspar, sericite and clay minerals.

6. Jarosite process was selected for iron removal due to the characteristics of the solution originated from the reduction leaching of manganese nodules by pyrite in chloride system.

7. This paper covers production practice of jarosite process in hot-acid leaching and comparison between iron hydroxide process and jarosite process that are used for iron removal.

8. The bulk of the native aluminium occurs in cracks in and along boundaries of jarosite, and only a small amount is present in and along the grain boundaries of quartz.

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9. The preparation of Ni - Zn ferrite from sodium jarosite residue was studied.

10. This paper expounds the fundamental rules of removing ferric ions by jarosite and presents results of removing ferric ions from concentrated acid curing-trickle leaching solution of an uranium ore.

11. Different metals are separated from the electroplating sludge by roasting and copper, nickel and chromium were recovered with suitable methods such as removing iron by sodium jarosite precipitation.