Method for quickly passivating and wrapping phosphorous tailings

Abstract

The invention discloses a method for rapidly passivating and coating phosphate tailings. The method comprises the following steps: inoculating thiobacillus ferrooxidans to a culture solution containing phosphate tailing slag and an improved 9K culture medium, regulating the pH to 1.5-3 for domestication by a sulfuric acid solution, inoculating the domesticated thiobacillus ferrooxidans to the culture solution containing the phosphate tailing slag and the improved 9K culture medium, regulating the pH to 1.5-3 by a sulfuric acid solution, and passivating for 84-108 hours. According to the method, the operation is simple, few instruments are used, the period of passivating and coating the phosphate tailings is short, leaching of metal elements in the phosphate tailings is effectively inhibited, the efficiency of removing heavy metal damage of the phosphate tailings is greatly improved in industrial application, and economic and environmental comprehensive benefits are obvious.

Description

technical field [0001] The invention belongs to the field of ore or waste treatment, in particular to a method for rapidly passivating and wrapping phosphorus tailings. Background technique [0002] Phosphate rock is the most basic raw material in the phosphorus chemical industry and is widely used in agriculture, medicine, food, textile, glass and national defense industries. The total amount of phosphate rock in my country is abundant, but the long-term unreasonable mining and processing processes have caused a great waste of phosphate rock resources, and also caused a great impact on the environment. The main component of phosphate rock is P 2 o 5 , SiO 2 , CaO, MgO, Fe 2 o 3 、Al 2 o 3 , also contains traces of heavy metal elements (such as chromium, cadmium, arsenic, lead, mercury, etc.) and radioactive elements (such as: uranium, radium, radon, etc.) and fluoride. During the stacking of minerals and tailings in the phosphate mining area, the heavy metal elements...

AI Technical Summary

Problems solved by technology

Physical remediation includes measures such as alien soil, soil replacement, and deep plowing. This method is effective and stable, but the project investment is large, the soil structure is easy to be damaged, and the soil with high concentration pollution level is likely to increase the potential harm to the operator; chemical Remediation is to put amendments into the soil to reduce the bioavailability of heavy metals through the adsorption, redox, antagonism or precipitation of heavy metals. This method is simple, effective and widely used, but chemical methods also have secondary effects. Pollution, soil quality decline and other problems; bioremediation is to absorb, degrade and transform pollutants in the soil through the action of microorganisms, so as to reduce the concentration of pollutants to an acceptable level or convert toxic and harmful pollutants into harmless substances. Also includes stabilization of pollutants to reduce their spread to the surrounding environment

Using this method can avoid the harm to the operator, and there is no second pollution, but there is no report on the microbial remediation of phosphorus tailings

Images