Common fluxes for pyrometallurgy and their effects

There are two types of pyrometallurgical fluxes, one is an oxidizing flux and the other is a slag-forming flux. Commonly used oxidizing solvents are saltpeter and manganese dioxide, which function as bismuth metal (copper, lead, zinc, iron, etc.) in the charge and sulphur oxidation into oxide for slagging. Commonly used slag fluxes are borax, quartz, carbonic acid. Na and so on. Its role is to react with the oxides of base metals to form slag.

Flux used in blast sintering ingredients

The flux particle size used in the blast sintering batch is less than 6 mm. The flux and quantity to be added shall be determined based on the blast furnace slag composition (ie slag type).

Introduction to aluminothermic production process

Aluminium process The method of producing iron alloys using aluminum as a restorative agent. The use of aluminum to restore the chemical reaction heat released by certain metal oxides can complete the oxide recovery response and obtain separate alloys and slag without the need to compensate for heat from the outside. The aluminothermic method and the silicon thermal method using silicon iron as a restoring agent belong to the same method of producing iron alloy by self-heating reaction, and are called metal heat method, which is also called the furnace method. They use aluminum particles, ferrosilicon powder or aluminum-magnesium alloy powder as a restorative agent. The aluminothermic method is primarily used to produce iron alloys, intermediate alloys, chromium and manganese containing high melting point metals and difficult to recover elements. The product features a very low carbon content (generally

Flux refining of aluminum alloy melt

This paper introduces the role of flux refining in the purification process of aluminum alloy melt, the classification and requirements of flux, the composition of common flux, the scope of application and the method of use.In the melting process of aluminum and aluminum alloys, hydrogen and oxidized inclusions are the main substances that contaminate the aluminum melt. Aluminum is very easy to form A1202 or secondary alumina with oxygen (Al2O and A10). At the same time, it is also very easy to absorb gas (H), which accounts for 70-90% of the total amount of gas in the aluminum melt, and the main defects in the cast aluminum alloy - pores and slag inclusions - are due to gas and oxidation remaining in the alloy. Caused by solid particles such as matter. Therefore, in order to obtain a high-quality melt, it is not only necessary to select a correct and reasonable smelting process, but also the refining and purifying treatment of the melt is important.