Method for producing iron oxide black

Abstract

This is the producing method of a kind of oxidized iron oxide black including following contents: prepare ferrite watery solution; use sodium hydroxide as neutralizaing agent and react with ferrite watery solution to produce hydroxide ferrous; use oxygenous gas as oxidant, and react with said hydroxide ferrous to produce iron oxide black; make the prepared iron oxide black water washed, sieved, dried and comminuted orderly to get blue oxidized iron oxide black pigment product. The oxidized iron oxide black produced by this method has high purity and thin crystal grain, the grain size of produced pigment is thin and even, and has saturated blue ink light black and stable effect to light and atmosphere. It also has strong pigmentation strength and hiding power, and can be used in such fine chemical industry products as printing ink and carbon powder. The farther project is using waste residue containing ferrous sulfate and vented in titanium oxide powder production, to produce ferrous sulfate watery solution and produce oxidized iron oxide black, which can adequately use industry waste material to produce oxidized iron oxide black products of high quality, and reduce environmental pollution.

Description

technical field [0001] The invention belongs to a production method of a pigment, in particular to a production method of iron oxide black. Background technique [0002] Iron oxide black is referred to as iron black, and its molecular formula is Fe 3 o 4 , or Fe 2 o 3 .FeO, the chemical name is ferric oxide, which belongs to spinel type, and can also be called ferrous ferrite Structural representation. [0003] Iron oxide black is widely used in paint coatings, building materials, cement industry coloring and other fields due to its strong hiding power, tinting power and good light resistance. In addition, it is also widely used in ink, printing, plastic coloring, polishing and metal flaw detection and other fields. The existing technology generally uses the direct addition method, that is, using the leftovers from the production of iron red or iron yellow as raw materials, adding and dehydrating under certain process conditions to form iron black. The disadvantage of ...

AI Technical Summary

Problems solved by technology

The existing technology generally uses the direct addition method, that is, using the leftovers from the production of iron red or iron yellow as raw materials, adding and dehydrating under certain process conditions to form iron black. The disadvantage of this process is that the obtained iron black product primary particles The shape is inconsistent, the particle size is large and the distribution is very uneven. After the pigment is made, the hue is reddish or yellowish, and the color saturation and tinting strength are relatively low.

In addition, in the existing production of titanium dioxide, every ton of titanium dioxide produced will produce 3-4 tons of waste residue containing ferrous sulfate, causing serious environmental pollution