Industrial Grade Soluble Sodium Chlorate in Hydrometallurgy

Sodium Chlorate - Basic information

Synonyms： Natriumchlorat
Sodium Chlorate
chlorate de sodium
Sodium chlorate (industrial)

CAS：7775-09-9

EINECS：231-887-4

InChI：InChI=1/ClHO3.Na/c2-1(3)4;/h(H,2,3,4);/q;+1/p-1

Molecular Formula：NaClO3

Molar Mass：106.441

Melting Point：248-261℃

Water Solubility：1000 g/L (20℃)

Physical and Chemical Properties：Characteristics of colorless or white cubic crystal system. The taste was salty and cool.
melting point 255 ℃
relative density 2.490
solubility soluble in water, soluble in ethanol, liquid ammonia, glycerol.

Sodium Chlorate---SPECIFICATION

What are the main functions of sodium chlorate in hydrometallurgy?

 Sodium chlorate mainly plays the role of providing chloride ions and reaction catalyst in wet metal smelting. Specifically, sodium chlorate can play a role in the following aspects: 1. Sodium chlorate provides chloride ions: sodium chlorate can be decomposed into chloride ions (Cl-) and sodium ions (Na+ ). Chloride ions can react with metal ions or metal oxides to form soluble metal chlorides, which convert metal ions into a dissolved state for easy extraction.

As one of the abundant elements in the earth's crust, iron is one of the main constituent elements of various minerals including copper, nickel, zinc and other non-ferrous metal ores. It often exists as an impurity, so iron removal in the field of non-ferrous metal smelting is an important issue. A common problem, especially in hydrometallurgical processes, is how to effectively and economically control, separate and utilize iron, which is a common and difficult problem.

The precipitation method is one of the important wet iron removal methods, and the goethite method is one of the effective iron removal methods. This method was successfully developed by the Belgian Laoshan Company and began industrial application in 1970. The advantages of the goethite method are that it is applied at normal pressure and lower temperature, the process equipment is simple, and the cost of iron removal is low: the iron precipitate is crystalline and has good filtration performance; the precipitated slag is less, the slag contains high iron, and it can be easily Properly treated, it can be used as raw material for ironmaking. Over the years, goethite iron removal has been widely studied and applied.

Iron removal from acidic solutions is a common problem in hydrometallurgical processes. Goethite iron removal is an effective and industrially applied iron removal method.

Among them, sodium chlorate was used as the oxidant, and the chlorinated leachate of the copper-nickel alloy with Fe3+ mass concentration of 21.76 g/ was used to remove iron by goethite method. Fe3+ was reduced with SO2. The degree of reduction was controlled by controlling the solution potential. Air was used as the The oxidizing agent oxidizes Fe2+. Research shows that the higher the pH of the solution, the faster the oxidation reaction of Fe2+. When the pH is <1.9, the air oxidation of Fe2+ is very slow: when the solution temperature is 80~90°C, use Na2CO3 to increase the pH to 3.5~4.0. , Fe2+ is easily oxidized and forms FeOOH and precipitates; if an appropriate amount of sodium chlorate is added to the Na2 CO3 solution, the oxidation rate of Fe2+ increases. Using sodium chlorate as the oxidant, this method has good iron removal effect. The Fe mass concentration in the liquid after iron removal is below 0.02 gL, the iron removal rate reaches 99.9%, and the copper loss rate in the iron slag is 0.23%.

Removing iron from acidic solutions is a common problem in hydrometallurgical processes. Removing iron with sodium chlorate is an effective and industrially applied iron removal method.