Method for processing perlite oil absorbent used for absorbing oil dirt on water surface

The invention discloses a method for processing perlite oil absorbent used for absorbing oil dirt on water surface. The method comprises the following steps: 1) selecting the components according to the mass percentage of 72-75% of silica, 15-18% of alumina, 0.5-1% of iron oxide, 2.9-3.5% of sodium oxide, 0.5-2% of calcium oxide, 2.5-3% of potassium oxide, 0.1-0.4% of manganese oxide, and 4-6% of moisture, screening the perlite ore sands with appropriate granularity of 0.2-0.5 mm as a raw material; 2) placing the perlite ore sand in a preheating furnace for preheating; 3) placing the preheated perlite ore sand in an expansion furnace for high-temperature roasting to reach instant expansion; and S4) performing film-coating modification on the particles surface for the expanded perlite ore sand to prepare the perlite oil absorbent used for absorbing oil dirt on water surface. The perlite oil absorbent particles have the advantages of light weight and high porosity, can suspend on the water surface for long time