Preparation method of high-temperature-resistant ferric oxide yellow pigment

The invention relates to a preparation method of a high-temperature-resistance ferric oxide yellow pigment. The method comprises the following steps: dissolving a ferric oxide yellow initial product into water to prepare slurry of which the mass percent is 5-40 percent, and preparing a water suspension; adding a sodium silicate aqueous solution into the water suspension, and reacting at the temperature of 30-90 DEG C and the pH value of 7-10 to coat silicon dioxide; adding a phosphorus compound aqueous solution and an aluminum salt aqueous solution at the temperature of 30-90 DEGC and the pH value of 5-9, and reacting to coat an aluminum phosphate compound; continually adding an aluminum salt aqueous solution, keeping the pH value at 4-10, and reacting at the temperature of 30-90 DEGC to coat aluminum hydroxide; filtering the obtained ferric oxide yellow, washing, drying and performing airflow smashing and organic treatment to obtain the high-temperature-resistance ferric oxide yellow pigment. The preparation method has the advantages of high controllability, high operability and easiness in industrial production, and the prepared ferric oxide yellow pigment has the advantages of high temperature resistance, high color-changing resistance, superior dispersion performance and the like.