Zinc Oxide Rotary Kiln And Smelting Process Of Zinc Oxide By Rotary Kiln

1. Introduction of Zinc Oxide Rotary Kiln

Zinc oxide rotary kiln is a kind of metallurgical rotary kiln. Metallurgical rotary kiln is mainly used for magnetization roasting of lean iron ore in steel works of metallurgical industry. Oxidation roasting of chromium and nickel ore; Refractory plant roasted high metallurgical ore and aluminum plant roasted clinker, aluminum hydroxide; Chemical plant roasted chrome ore and chromium ore powder and other minerals.

Zinc oxide is produced in a rotary kiln by mixing zinc charge, coal and other auxiliary materials through a series of chemical reactions. Zinc oxide, also known as zinc white, is easy to disperse in rubber and latex, natural rubber, synthetic rubber reinforcing agent, active agent and vulcanizing agent, but also white rubber colorant and filler.

2.Smelting process of zinc oxide by rotary kiln

Rotary kiln is the zinc ore raw material and coke coal powder and lime crushed into particles less than 40 mesh, zinc ore raw material and coke coal and lime according to 1∶ (0.40 ~ 0.5) : Then the mixture is made into particle mixture with an effective diameter of 8-15mm. Finally, the particle mixture is put into the rotary kiln. The ingredients are continuously transferred to the drying and preheating section (about 11m,650-700 degrees), then to the intermediate temperature section (about 17m,700-850 degrees) and finally to the high temperature section (about 17m,850-1100 degrees,907 degrees is the boiling point of Zn) for smelting. Under high temperature into zinc vapor, and then into the hot air for oxidation, the production of zinc oxide after cooling, cyclone separation, with a cloth bag to capture fine particles, so get zinc oxide is called "indirect zinc oxide".

When smelting zinc oxide ore containing 20% ~ 25% zinc or industrial slag containing zinc in rotary kiln, it can greatly save coke or coal. The smelting product has the characteristics of good quality, improved productivity and small nodulation.

Using rotary kiln calcination process, when smelting zinc oxide ore with zinc content of 20% ~ 25%, the yield rate is 15% ~ 20%. (Namely 5-6T raw ore out of 1T zinc concentrate)

3. Production site