Quick cleaning method for quartz sand acid pickling

Abstract

The invention discloses a quick cleaning method for quartz sand acid pickling.The method includes the following steps that firstly, quartz sand to be acid-pickled is placed into an acid pickling purification device, an acid pickling solution is added, acid pickling is conducted for 3-6 h, then the quartz sand to be acid-pickled is eluted, and the acid pickling solution is collected; secondly, the acid-pickled quartz sand is conveyed into a washing device, a plurality of adsorption bags are buried in the quartz sand, all the adsorption bags are taken out after 10-20 min, clean water is added into the washing device to soak the quartz sand for 10-20 min, then stirring washing is conducted, a cleaning solution is discharged, then the adsorption bags are placed into the washing device again for adsorption, clean water soaking and stirring washing are conducted for many times till the surface of the quartz sand is neutral, the washing solutions are combined, the cleaned quartz sand is conveyed into a drying device to be dried for 3-4 h, and purified quartz sand is obtained; thirdly, the collected acid pickling solution and the combined washing solution are conveyed into an acid solution recycling device for waste acid and wastewater treatment.The acid solution recycling device designed in the method has the advantages of being environmentally friendly, capable of saving energy, convenient to operate and low in cost.

Description

technical field [0001] The invention relates to the technical field of purification of quartz sand. More specifically, the present invention relates to a method for quickly cleaning pickled quartz sand. Background technique [0002] Quartz sand is a very important non-metallic mineral raw material, 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 impurity minerals in the quartz sand itself, especially the content of metal minerals represented by impurity iron, which determines the value and use value of quartz sand. Existing methods for removing iron from quartz sand mainly include: 1) multi-stage magnetic separation, which is applicable to the purification process of quartz sand containing strong magnets, but its iron removal effect is difficult to achieve the desired effect and purpose; 2) in 1) Flotation is carried out on the basis of 1), although it can achieve a...

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Problems solved by technology

Existing methods for removing iron from quartz sand mainly include: 1) multi-stage magnetic separation, which is applicable to the purification process of quartz sand containing strong magnets, but its iron removal effect is difficult to achieve the desired effect and purpose; 2) in 1) Flotation is carried out on the basis of 1), although it can achieve a certain expected effect, but the product quality is unstable, and it is difficult to purify the quartz to below the trace level (0.5-20ppm); 3) On the basis of 1), carry out pickling to remove iron, It can not only achieve the expected effect, but also has stable product quality and can be mass-produced on a large scale. It is the most effective way to purify quartz sand at present, but its biggest disadvantage is that a large amount of waste acid and waste water will be generated during the pickling purification process. polluted environment

[0003] At present, the waste acid and waste water in the process of pickling and purifying quartz sand are mainly neutralized with lye to pH = 7, and then discharged, but long-term discharge not only wastes a lot of fresh water resources, but also causes certain pollution to the environment

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