Iron Activation Of Sphalerite And Pyrrhotite Inhibition Mechanism Pilot Study

Activation of marmatite and separating marmatite from pyrrhotite is one of the difficulties in separating multi-element sulfide. The content of iron in the marmatite is up to 20% in Wenshan Dulong plant,in Yunnan province. Moreover, the useful elements associate in a complicated way. It is one of the great difficults in mineral engineering. So, it is meaningful to research activating marmatite and depressing pyrrhotite.The flotation of high iron marmatite in Dulong is representive on this mineral engineering focus. The raw ore has a great content of iron. It has many useful elements and rare-elements. All the minerals associate in a complicated way. According to the idiographic properties of the minerals on Dulong plant,the test is carried though thereinafter aspects.Flotation tests of pure minerals is carried though. The results indicates that the initial flotability of marmatite is very low and it could not be gained by single collector. The traditional marmatite's activators such as NH₄⁺' Pb²⁺, Ag⁺, Cu²⁺ can not activate marmatite effictively. A new activator of marmatite called X-41 can make the flotational recovery up to 71.8%. It superior to those activators such as NH₄⁺, Pb²⁺, Ag⁺, Cu²⁺ obviously.Flotation tests of spot ores is carried though in lab. The results approve the conclusions of pure mineral tests furtherly. The new activator called X-41 replaces bluestone to activate marmatie. It has great selectivity, can activate on low pH and is propitious to the following task. In a same flowsheet, the replace of bluestone by X-41 can increase content by 5.48% and increase recovery by 4.18%.The mechanism of activating marmatite and dpressing pyrrhotite is reaserched. This reaserch is mainly on the crystal structure and Eh-pH change. This reaserch approves the upper conclusion in a academic way.The activator called X-41 applied in a industrial test. The industrial test was successful. X-41 lowered the zinc flotation pH from 12 to 8.4, reduced the dosage of flotational medicament such as lime and vitral. It is useful for mineral engineering.