Sodium metabisulfite

Sodium metabisulfite, also known as Na2O5S2. is a powerful mineral processing regulator used in various industries to reduce the oxidation state of minerals and improve the effect of collectors. This compound plays a crucial role in mineral processing operations, particularly in the extraction of valuable metals from ores. In this article, we will delve into the description, properties, and applications of sodium metabisulfite in the context of mineral processing.

Sodium metabisulfite is a white crystalline powder with a pungent sulfur odor. It is soluble in water and forms a strong acidic solution. This compound is a sodium salt of metabisulfite, which is composed of sodium, sulfur, and oxygen atoms. Its chemical formula, Na2O5S2. reflects its composition and structure. Sodium metabisulfite is a versatile chemical compound that finds applications in various industries, including food and beverage, water treatment, pharmaceuticals, and mineral processing.

The properties of sodium metabisulfite make it an ideal choice for mineral processing applications. It is a reducing agent, meaning it has the ability to donate electrons to other substances, thereby reducing their oxidation state. This property is crucial in mineral processing, where the reduction of oxidation state is necessary to facilitate the extraction of metals from ores. Additionally, sodium metabisulfite is stable under normal conditions but decomposes when heated, releasing sulfur dioxide gas. This decomposition reaction is utilized in various industrial processes, including mineral processing, where the release of sulfur dioxide can aid in the modification of mineral surfaces and improve the efficiency of collectors.

In the field of mineral processing, sodium metabisulfite is primarily used as a regulator to control the oxidation-reduction potential of the pulp in flotation processes. Flotation is a widely used method for separating valuable minerals from their ores. In this process, collectors are added to the pulp to enhance the hydrophobicity of the mineral particles, allowing them to attach to air bubbles and be carried to the surface for recovery. However, the presence of oxidizing agents in the ore pulp can hinder the effectiveness of collectors. Sodium metabisulfite is employed to mitigate this issue by reducing the oxidation state of minerals, thereby improving the adsorption of collectors onto the mineral surfaces.

sodium metabisulfite is utilized in the cyanidation process for gold extraction. In this process, sodium metabisulfite is added to the leaching solution to reduce the excessive dissolved oxygen, which can interfere with the cyanidation reaction. By controlling the oxidation-reduction potential, sodium metabisulfite ensures the efficient extraction of gold from the ore.

sodium metabisulfite is a vital component in mineral processing operations, where its role as a regulator helps optimize the efficiency of various extraction processes. Its ability to reduce the oxidation state of minerals and improve the effect of collectors makes it an indispensable chemical in the pursuit of extracting valuable metals from ores. As the demand for precious metals continues to rise, the importance of sodium metabisulfite in mineral processing is expected to remain significant in the years to come.

CAS: 7681-57-4

Packing specifications

25 kg multiwall paper bags with PE inner liner

50 kg PP woven bags with PE liner

Certifications

ISO 9001. ISO 22716. cGMP certified

Kosher, Halal certified

Shipping Information

MOQ: 1000kgs

Port of Loading: Shanghai Port, China

Delivery Time: 4-6 weeks

Payment Terms

L/C, D/P, T/T at buyer’s cost

Sample available on request

English name：

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