Method and device for continuous acid pickling purification of quartz sand

A technology of quartz sand and pickling, which is applied in the direction of silicon dioxide and silicon oxide, can solve the problems of simple and backward equipment, low production efficiency, and difficulty in quartz sand, and achieve continuous pickling purification improvement, improvement of effect, and improvement of quality Effect

CN104058413AActive Publication Date: 2014-09-24田辉明
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-09-24

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Abstract

The invention provides a method for continuous acid pickling purification of quartz sand. The method comprises the steps of heating, material loading, acid pickling, deacidifying, water washing, acid recovering and tail gas treatment. The invention also provides a device for implementing the method to perform continuous acid pickling purification on quartz sand; the device comprises a heating unit, a storage unit, a drum mixer, a water washing unit, an acid recovery unit and a water-jet vacuum unit; spiral line plates are arranged on the inner wall of a drum of the drum mixer, 20-60 lifting plates are mounted between two adjacent spiral line plates, two adjacent lifting plates and the spiral line plates on the two sides thereof are combined to form a lifting bucket, a driven gear is arranged on the outer wall of the drum of the drum mixer in a sleeved manner, a charging opening and a discharging opening are formed in the two ends of the drum, and spiral line plates are mounted on the inner walls of both of the charging opening and the discharging opening. The method and the device are capable of realizing sufficient acid pickling purification of the quartz sand by virtue of continuous automatic feeding, turning over and discharging of the quartz sand and acid liquor; as a result, the production efficiency and the quality of product are improved, and the acid is recycled and absorbed by use of alkaline so that the production cost is reduced, and meanwhile, the environmental pollution is reduced.
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Description

technical field

[0001] The invention relates to a method and device for continuous pickling and purification of quartz sand. The invention belongs to the technical field of non-metallic ore deep processing. Background technique

[0002] After the quartz sand is purified by pickling, the content of metal impurities represented by iron is greatly reduced, and its purity is significantly improved. According to the purity of the purified quartz sand, it is used for optical glass, crystal glass and accessories, electronic glass, liquid crystal glass substrate, ordinary quartz glass, high-purity quartz glass, semiconductor quartz glass tube, solar polysilicon, and quartz crucible for monocrystalline silicon. , electronic potassium silicate solution, high-purity sodium silicate solution and silica powder, high-purity, high-quality white carbon black and other materials.

[0003] At present, there are two commonly used methods for pickling and purifying quartz sand. The quartz san...

Examples

Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0031] The acid solution in this embodiment is hydrochloric acid.

[0032]The concrete steps of a kind of quartz sand continuous pickling purification method are as follows:

[0033] (1) Raw material heating: heat the quartz sand to a temperature not higher than 180°C, and use the authorized utility model patent (patent number: 200620163898.5) to heat the quartz sand heater in a high-purity quartz sand drying device. The final quartz sand is stored in a steel storage tank with a polytetrafluoroethylene lining, and the hydrochloric acid is used at room temperature; or both the quartz sand and the hydrochloric acid are heated to 80-100°C, and the heating method of the quartz sand is the same as above (or the quartz sand is heated by electric heating) The method of heating the glass tube by baking sand), the heating method of hydrochloric acid uses...