April 30, 2021

What acid is used for quartz sand pickling?

For the production of high purity quartz sand, the removal of iron film is a very important problem. Scrubbing, ultrasonic cleaning and pickling are the main methods to remove film iron, and pickling is the most common and effective method.
The purpose of pickling is to eliminate impurities such as metal oxides or fine silicate minerals, which are difficult to dissolve in water and soluble in acid. Generally, the mixed acid composed of hydrochloric acid, nitric acid, sulfuric acid and hydrofluoric acid should be determined according to the surface pollution of raw materials and determined by experiments. The acid treatment also has a certain effect on eliminating inclusions on the surface of powder, and the effect is better when the temperature is raised.
So what is the most commonly used acid in pickling quartz sand washing plant?
1. Hydrochloric acid (HCL)
Hydrochloric acid molecular formula: HCl, properties: colorless transparent liquid, hydrochloric acid with impurities is yellowish. Specific gravity: 1.19, strong irritant and corrosive, toxic.
Hydrogen chloride does not react with water, but it is soluble in water. It often exists in the form of hydrochloric acid smoke in the air. Dry hydrogen chloride can not react with active metals such as zinc, magnesium, iron and most metal oxides. However, the chemical properties of wet hydrogen chloride gas are quite active and can react with the above metals and oxides.
silica sand
2. Oxalic acid
Oxalic acid molecular formula: H2C2O4, molecular weight: 90.04, colorless monoclinic flake or prism crystal or white powder. It can be used as a complexing agent, masking agent, precipitant or reducing agent. It can be used to precipitate calcium, magnesium, thorium and rare earth elements. The common oxalates are sodium oxalate, potassium oxalate, calcium oxalate, ferrous oxalate, antimony oxalate and ammonium hydrogen oxalate.
Oxalic acid

For more information about quartz sand purification and pickling, please visit SINONINE website: www.9silica.com,or contact us directly by +86-18118821087(WhatsApp).

Lasted news & technology
Nov 16 2021

In this paper, the processing of photovoltaic glass ultra silica sand is introduced in detail. The Fe2O3 in silica sand is reduced to less than 90ppm by flotation with common quartz sand as raw material to meet the quality requirements of ph

Nov 13 2021

The most direct index to measure the purity of high purity quartz sand is the content of alkali metals, key transition elements, aluminum and boron in raw materials.

Oct 31 2021

How to reasonably design the water circuit and how to reuse the water produced in each section of the sand washing plant after treatment are very important issues.

Oct 16 2021

Fracturing sand washing plant is generally divided into five stages, namely sand mining stage, sand pre screening stage, sand washing classification stage, fine sand drying stage and finished product screening and packaging stage.

Jun 26 2021

This article describes a sand washing plant for low expansion foundry sand.

Jun 24 2021

The sinonine team has invented sand washing plant of removing iron from quartz sand through continuous exploration.

Jun 15 2021

The season of continuous spring rain will still have a serious impact on the production of quartz sand.

Jun 10 2021

In the sand washing plant, if we want to produce high-purity quartz sand, we need to choose the right raw materials, so how to determine the raw materials of high-purity quartz sand?

Contact us

Thank you for your interests in Sinonine, Please feel free to submit your inquiry information to us, our expert will contact with you as soon as possible.