According to the announcement of the State Intellectual Property Office, PetroChina Company Limited has applied for a project entitled "a Method for Enriching and Separating Arsenic, a Harmful Component in Waste Drilling Mud", with the publication number CN117658397a, and the application date is August 2022. The
patent abstract shows that the invention relates to a method for enriching and separating harmful component arsenic in drilling waste mud, which comprises the following steps of: 1) treating iron powder with an acid solution and drying to prepare an enriching agent; 2) fully mixing the arsenic-containing waste mud with a strengthening agent and the prepared enriching agent for reaction, so that the arsenic is enriched on the surface of the enriching agent; And 3) separating the enrichment agent after the mixed reaction from the waste slurry through strong magnetism to obtain a small amount of waste residue and arsenic removal slurry.
The content of the pollutant arsenic in the treated waste slurry is reduced, and the treated waste slurry can be used as roadbed filler or for making bricks, cement and the like, thereby avoiding the secondary pollution possibly caused by the conventional stabilization; The amount of that collect waste residue is small, and the arsenic in the waste residue is treated and passivate, so that resource utilization or landfill can be carried out.
