Mineral oxidation acid production inhibition method based on sulfide mineral surface in-situ rapid film formation

Abstract

The invention discloses a mineral oxidation acid production inhibition method based on sulfide mineral surface in-situ rapid film formation. The method comprises the following steps of sequentially and uniformly spraying a first hydrophobic film solution and a second hydrophobic film solution on the surface of a target sulfide mineral, so that a hydrophobic double-layer passivation film is formed on the surface of the target sulfide mineral in situ, and oxidation acid production of the target sulfide mineral is effectively inhibited. According to the method, the hydrophobic double-layer passivation film can be rapidly formed on the surface of the sulfide mineral such as pyrite, pyrrhotite and arsenopyrite in situ, contact between moisture, air and microorganisms and the surface of the sulfide mineral is avoided through the isolation effect of the hydrophobic double-layer film, and therefore the oxidation effect of the sulfide mineral under the effects of the microorganisms, the air, the moisture and the like is inhibited; and the acid mine wastewater can be eradicated from the source. According to the method, the hydrophobic double-layer passivation film can be rapidly generated in situ in the environment of a tailing pond and a tailing slag storage yard, generation of the acid mine wastewater is eradicated from the source, and the method has important significance on tailing treatment and environmental protection.

Description

Technical field

[0001] The present invention relates to a mineral oxidative acid suppression method based on a rapid film formation of a vulcanized mineral surface, belonging to the technical field of tailings governance. Background technique

[0002] Tailings (AMD) produced by acid mine wastewater (AMD) is produced under natural conditions during natural conditions. Most of China's metal mine is the native sulfide deposit (yellow iron ore, magnetic iron ore, arsenic, and 矿 矿, etc.), and a large amount of abandoned minerals and tailings are weathering, leaching, etc., which is easy to form acidic mine wastewater. This is because the vulcanized mineral is exposed to the environment, which is extremely easily oxidized under the action of water, oxygen and microorganism. The acid mine wastewater pH is extremely low, sulfate and heavy metal ions (CD, Cu, Mn, Pb, Zn, AS) have a high content, causing serious damage to the surrounding environment, and the problem of acidic mine wastewat...