Quartz sand purifiion is removal of a small amount of impurities and the high difficulty separation technique to obtain refined quartz sand or high purity quartz sand. The purifiion technologies of quartz sand at home and abroad are washing classifying And des scrubbing magnetic separation flotation acid leaching microbial leaching etc.
Quartz Sand Dressing Production Line is suitable for quartz sand containing iron or mica.
Solution DescriptionWashing and classifying des
The SiO2 grade in quartz sand decreases by quartz sand size becoming finer so washing and des of crude quartz sand is necessary before next step.
ScrubbingScrubbing is the way to remove film iron and impurity minerals on the surface of quartz by mechanical force and crush these mineral aggregate. The quartz sand gets further purifiion by classifiion. There are two kinds of methods rob scrubbing and mechanical scrubbing.
FlotationThe separation of mica and quartz is difficult the effective methods anionic collector in acid condition and anionic - ionic collector in alkaline condition. The purifiion of quartz sand can reach 99 after scrubbing des magnetic separation and flotation.
Acid LeachingDilute acid had a significant effect on removing iron and aluminum and concentrated acid for the removal of titanium and chromium and mixed acid for mineral impurity. Control various factors of acid leaching should be based on quartz final grade requirements and as far as possible reduce the acid concentration temperature and dosage to achieve quartz purifiion.
A quartz sand dressing plant in Yunnan with the main component was quartz sand accounting for 95-97 siliceous cement accounting for 8-23 the impurity minerals were hematite limonite etc. accounting for about 1-3. The plant adopted screen classifiion - dry magnetic separation - dosing strong scrubbing-flotation Process the final indexes SiO2 ≥ 97.62 Fe2O3 ≤ 0.24 Al2O3 ≤ 1.11.The poor indexes seriously affect the production and economic benefit. Therefore the plant commissioned the Xinhai to reform technology. By dressing tests Xinhai decided to adopt the screen classifiion - dry magnetic separation - dosing strong scrubbing - acid leaching Process specific index comparison as follow.