Ferrous Sulphate By-Product Of Titanium Dioxide

Ferrous sulphate, a by-product of titanium dioxide, is a by-product produced in the production process of titanium dioxide by sulfuric acid method.Every ton of titanium dioxide produced generates 3-4 tons of ferrous sulphate. Because it contains impurities such as Mn2+, Al3+, Mg2+, Ca2+, Ti4+, and trace amounts of heavy metals, it cannot be directly utilized.Since the by-product of titanium dioxide： ferrous sulphate, ferrous sulphate heptahydrate, has a high content of 85%~90%, it has high resource utilization value.

At present, the main ways of resource utilization of ferrous sulphate, a by-product of titanium dioxide, are：

Production of Ferrous Sulphate Monohydrate for Feed

Iron is an irreplaceable trace element essential for the growth and development of animals and plants. It plays a vital role in photosynthesis and chlorophyll synthesis in plants, and in the synthesis of hemoglobin, cytochromes, and oxidases in animals. Therefore, ferrous sulphate is a primary iron supplement in agriculture and animal husbandry. Ferrous sulphate monohydrate for feed, in particular, is used as a mineral additive in animal husbandry.

Production of Water Purifiers

After removing heavy metals and other harmful impurities,ferrous sulphate heptahydrate (crystals) can be directly used as a water treatment agent, primarily for coagulation, phosphorus removal, pH adjustment, and heavy metal removal. Using ferrous sulphate directly as a water treatment agent offers low cost and widespread availability, combining coagulation, phosphorus removal, and reduction functions while also having a certain inhibitory effect on algae.

As a Reducing Agent

Adding a small amount of ferrous sulphate granules or powder to the cement production process can reduce hexavalent chromium in the cement to trivalent chromium, which precipitates within the cement.Its reducing properties are stable, and ferrous sulphate does not affect the cement's water retention, shrinkage, or compressive strength.It will not affect the segregation and bleeding of cement.As early as 2003, EU countries discovered this hidden problem and imposed strict standard restrictions on water-soluble hexavalent chromium in cement, which should not exceed 2PPm.