Method for producing high-temperature-resisting iron oxide red

Abstract

The invention discloses a method for producing high-temperature-resisting iron oxide red. The method is characterized by comprising the following steps: obtaining the iron oxide red by virtue of a wet process sulfate oxidizing method; forming a micro dry iron oxide yellow red filter cake, then putting the filter cake, a water soluble additive and water into a beating machine in proportion and pulping, wherein the concentration of the sizing agent is controlled at 35-40%, and the time for pulping is 10-15 minutes; then adding a high-temperature-resisting additive and carrying out secondary pulping, wherein the concentration of the sizing agent is controlled at 40-55%, and the time for pulping is 10-15 minutes; heating up to 70-80DEG C, and carrying out heat preservation for 30-40 minutes; adding a neutralizer to regulate the PH of the sizing agent to be 7-7.2, and carrying out heat preservation for 30-40 minutes; after finishing pulping, producing the iron oxide red according to normal steps; separating solid from liquid so as to obtain the high-temperature-resisting iron oxide red. The iron oxide red prepared by the method can resist high temperature of 350-420DEG C without changing color or changing slightly, still has very high use value and does not affect the use effect, thus having a satisfying result.

Description

technical field [0001] The invention relates to a production method of high-temperature-resistant iron oxide red, which belongs to the field of high-temperature plastics, high-temperature ceramics or high-temperature buildings. Background technique [0002] There are two types of iron oxide red, natural and man-made. Naturally called west red, it is basically pure iron oxide, which is red powder. Due to different production methods and operating conditions, their crystal structure and physical properties are very different. The color varies from orange to blue to purple, and the hiding power and tinting power are very large. Density 5-5.25. It has excellent light resistance, resistance to atmospheric influence, resistance to dirty gas, and resistance to all alkalis. The iron oxide red in appearance is orange-red to purple-red trigonal crystal powder. The relative density of natural western red is 55.25, the fineness is 0.4-20um, and the melting point is 1565 (decompositio...

AI Technical Summary

Problems solved by technology

High-purity is the main base material of powder metallurgy, which is used to smelt various magnetic alloys and other advanced alloy steels. These various uses require extremely high temperature resistant iron oxide red to be realized. In recent years, a series of iron oxide reds with high temperature resistance have emerged. Iron oxide red pigments for high temperature materials, the highest temperature resistance is 270 ~ 300 ℃, but it still cannot meet the demand for materials that need high temperature resistance. Therefore, it is necessary to invent a kind of pigment that can still maintain excellent product characteristics under high temperature Iron oxide red, the subject of thermal research by workers in this field