Manufacturing method of granular iron oxide black pigment and double-roller grinder for realizing same

Abstract

The invention mainly discloses a manufacturing method of granular iron oxide black pigment, which comprises the steps of: sending iron black block material with the water content of 1-2% into a double-roller grinder, and grinding the dry iron black block material into granules with the needed size in the double-roller grinder; then, classifying by a rotary vibration sieve; and collecting granular iron oxide black of 20-80 meshes. The technique has the advantages of solving the problem of the occupational disease caused by dust pollution of iron oxide pigment industry, improving the working environment of workers and protecting the health of the workers. The invention also discloses the double-roller grinder for realizing the method, the upper part of the grinder is provided with a pair of rollers which are provided with a fit clearance adjusting mechanism; three layers of vibrating screens which are driven by an eccentric motor and have the number of sieve meshes that are increased gradually from top to bottom are positioned just under the rollers; and the edges of the vibrating screens are provided with discharge holes. The double-roller grinder leads the material to be bitten into a grinding area by utilizing the frictional force of roller surfaces, thus crushing the material by extruding or splitting.

Description

Technical field: [0001] The invention relates to a process for producing granular iron oxide black pigment with the characteristics of good fluidity, easy dispersion, no dust and moderate particle mechanical hardness. In order to realize the process, the present invention also relates to a pair-roll pulverizer for realizing the method. Background technique: [0002] Iron oxide black is referred to as iron black, the main component is ferric oxide, and the molecular formula is Fe 3 o 4 or Fe 2 o 3 ·FeO, it has saturated blue ink light black, high hiding power and tinting power, very stable to light and atmosphere, it is widely used in cement coloring, paint coating in building materials industry, and in ink, printing, plastic coloring , Polishing and metal flaw detection applications. According to market research, with the continuous improvement of the automation level of pigment application fields at home and abroad, and the emphasis on employee health and environmental...

AI Technical Summary

Problems solved by technology

[0004] The above granulation has the following disadvantages. One is that the pigment has repeated drying process, which will greatly increase the energy consumption of the product; the other is that additives such as binders are added during the granulation process, so that the coloring strength of the granule pigment is stronger than that of the previous powder sample. About 20% drop, but also affect the color tone and other performance

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