There are different process routes of iron oxide in wet, because of their advantagescan exist independently. Nitrate wet iron oxide red with better performance, but the cost is higher, the more nitrate. Sulfate wet red low raw material cost, labor conditions are good, but the use of performance than nitrate wet red iron good. Mixed acid saltprocess for iron oxide red raw materials wet red iron oxide in different technologies,due to their advantages can exist independently. Nitrate wet iron oxide red with better performance, but the cost is higher, the more nitrate. Sulfate wet red low raw material cost, labor conditions are good, but the use of performance than nitrate wet red irongood. Mixed between acid salt process for iron oxide red raw materials and the use of performance generally somewhere. Ammonia method of iron oxide red iron quality is better than the method, better working conditions, but the ammonia consumptionamount is large, the general treatment of wastes from the point of view is desirable, if from genuine ferrous sulfate manufacturing economy does not necessarily appropriate.
Aniline method of iron oxide can be obtained at the same time two products, the cost is relatively low, but to take into account technological conditions of two products. Ironand one step oxidation method in the domestic not yet has the industrial scaleproducts, is a direction of the industry line. At present, a large number of domesticuse iron hydrolysis technology is more mature, low production cost, good product quality, but the iron law of low yield, long production cycle, iron slag on the pollution of the environment, but also a large area, so can not meet the current process. Shouldaccording to the situation of our country and create a more favorable view of process route, iron oxide red could waste resources of this feature using other industry, canthe extensive collection of ferrous sulfate by-product of titanium white. As the raw material of pickling waste liquor, aniline mud iron steel industry, mass production ofiron oxide red supply domestic and foreign market needs.
Inorganic pigment is divided into natural inorganic pigments and inorganic pigment,inorganic pigment is a natural mineral pigments. Organic pigments are coloured organic compounds, are also divided into natural and synthetic two categories. Nowcommonly used is a synthetic organic pigment coating technology: [according toChina ink network August 19th reports] inorganic pigment is non-ferrous metal oxides,metal or metal insoluble salt, inorganic pigment and divided into natural inorganicpigments and inorganic pigment, inorganic pigment is a natural mineral pigments.Organic pigments are coloured organic compounds, are also divided into natural and synthetic two categories. Now commonly used is a synthetic organic pigments, organic pigment color varieties, relatively complete, performance is better than inorganic pigment. Inorganic pigment is mainly of carbon black and iron, titanium, zinc, barium,cadmium, lead and other metal oxides or salts. Organic pigments can be divided intomonoazo, double azo phthalocyanine, lake, or fused ring pigments and other categories. Inorganic pigment fast, heat resistance, weather resistance, solvent resistance, hiding power strong, but not very complete chromatography, tinting strength is low, the color brightness difference, some metal oxides and salts toxicity.Diversity, organic pigment structure complete chromatogram, pure colors, strong coloring, but some products light resistance, weather resistance, solvent resistance is poor, high-grade organic pigments have light, good weather resistance, solvent resistance, but the price is expensive.
