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Production method of chemical zinc oxide
Release time:
14 Sep,2020
In the industrial zinc oxide production process, zinc oxide is a commonly used product in daily life.
In the industrial zinc oxide production process, zinc oxide is a commonly used product in daily life. The production process of zinc oxide uses zinc concentrate as raw material, which is oxidized and roasted at high temperature, and then reduced to zinc vapor by adding coal.
Flat kiln: The high-temperature oxidation roasting process is converted from refractory materials in a cubic kiln, and the slag leaks from the bottom of the kiln. Material: zinc ore, zinc ash, zinc content requirements in more than 30%. Output value: the furnace body is about 6 square meters, the daily output is about 2-3 tons, the content is between 85% and 99%, and the equipment investment is about 400000 yuan. Advantages: burning with anthracite, good zinc oxide color, low sulfur and chlorine content. Raw materials are sufficient and products are widely sold.
Rotary kiln: The high-temperature baking process is carried out in a round iron cylinder, which has an inclination of about 20 degrees and a length of about 40 meters. The slag is fed from the top and discharged from the bottom. The vapors are collected and oxidized to zinc oxide. Material: Various industrial zinc-containing waste residues can usually be used, and the zinc content exceeds 16%. The daily output value of the round iron drum is about 10 tons, and the content is between 55% and 92%. Equipment investment is about 600000. Advantages: low raw material requirements, high recovery rate and high output value. The color of zinc oxide is yellow, some are gray. High sulfur and chloride content. It is usually used as a raw material for other occupations, and zinc oxide for ceramic glazes is also used.
Smoker: Fine production process unknown. Material: Industrial zinc-containing waste residue, usually with a zinc content of more than 14%, a daily output value of 20 tons, and a content of 45-80%. Equipment investment 1 million. Advantages: high recovery rate and high output value. Light zinc oxide, zinc oxide color is light yellow or gray. If the producer is well controlled, the sulfur chloride content is not high.
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