Quartz sand pickling method and device

Abstract

The invention discloses a quartz sand pickling method and device. According to the technical scheme of the quartz sand pickling method and device, the quartz sand pickling device comprises a picklingbed with a cavity used for containing quartz sand, and a sealing cover capable of sealing the cavity is detachably connected to the upper end of the pickling bed; a pickling unit for conveying acid liquor to the bottom of the quartz sand from the lower part of the cavity and an air supply device for conveying compressed air into the cavity are arranged on one side of the pickling bed; the air supply device is used for supplying air into the cavity from the upper end or the lower end of the pickling bed; and the quartz sand pickling device also includes a water supply device used for conveyingpure water to the bottom of the quartz sand. The invention has the beneficial effects that acid liquor and quartz sand are fully mixed, the pickling effect is good, less cleaning water is used, the cleaning time is short, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of quartz sand purification, in particular to a quartz sand pickling method and device. Background technique [0002] Quartz sand is a very important non-metallic mineral raw material, which is widely used in industries such as glass, ceramics, cement and refractory materials; the grade and value of quartz sand mainly depend on the content of metal impurities in the quartz sand itself, especially The content of metal minerals represented by impurity iron determines the value and use value of quartz sand. [0003] Pickling of quartz sand is mainly to improve the purity of quartz sand, the mixed acid reacts with metal impurities in quartz sand, washes them off, and reduces the content of metal impurities in quartz sand; at present, the method of soaking is mainly used, and the pickling reaction is slow and takes a long time. It is because pickling is not sufficient, and the ideal effect cannot be achieved; at...

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Problems solved by technology

[0003] Pickling of quartz sand is mainly to improve the purity of quartz sand, the mixed acid reacts with metal impurities in quartz sand, washes them off, and reduces the content of metal impurities in quartz sand; at present, the method of soaking is mainly used, and the pickling reaction is slow and takes a long time. It is because pickling is not sufficient, and the ideal effect cannot be achieved; at present, there is also a way to increase the contact area by turning up and down, but this method requires high equipment and does not have a good mixing effect; in summary, the current quartz sand Pickling equipment has the following deficiencies:

[0004] First, when the existing pickling equipment is adding acid, the contact between the acid and the quartz sand is not sufficient, and usually a single tube is used to add the acid, the acid needs to be dispersed and then mixed with the quartz sand, which cannot make the acid The liquid is fully mixed with the quartz sand, which affects the pickling efficiency of the quartz sand and the quality of the quartz sand purification.

[0005] Second, the waste of cleaning water is serious during pickling of quartz sand. In order to ensure the purity of quartz sand during cleaning, pure water is generally used for cleaning. Pure water is used more and the cost is higher.

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