Resource utilization method of mine high-iron and high-acid wastewater neutralization slag

• Main Authors: XU TAO, WU ZENGLING, ZHUANG RONGCHUAN, WANG HONG, ZOU LAICHANG
• Format: Patent
• Language: Chinese; English
• Published: 10.12.2021
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; METALLURGY; PERFORMING OPERATIONS; REFRACTORIES; SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE

The invention discloses a resource utilization method of mine high-iron and high-acid wastewater neutralization slag. Magnetic separation is performed on iron-containing substances in the neutralization slag by adopting a high-gradient magnetic separator according to the difference of specific magnetization coefficients of ferric hydroxide and gypsum, and magnetic particles are adsorbed on the surface of a magnetic medium for enrichment by controlling the magnetic field intensity; and non-magnetic particles flow away from a tailing hopper, so that the gypsum and the ferric hydroxide in the neutralization slag are preliminarily separated. Then the hydrophobic (aerophile) characteristic of the mineral surface is changed through the interaction of a flotation reagent and mineral particles. In the stirring and inflating process, the mineral particles make contact with and collide with bubbles, the particles with good floatability are selectively attached to the bubbles and are carried to rise to form a mineralize