A kind of iron oxide red seed crystal preparation tank and preparation method thereof

Abstract

The invention relates to an iron oxide red seed crystal preparation tank and a preparation method of iron oxide red seed crystals and belongs to the technical field of resourceful treatment of waste. The iron oxide red seed crystal preparation tank comprises a seed crystal synthesis tank, a pH value control system, a temperature control system, an air quality control system, a feed liquid purification system, a purified feed liquid adding system and an iron oxide red seed crystal discharging system; and feed liquid is treated by the feed liquid purification system and then enters the seed crystal synthesis tank, and the pH value control system, the temperature control system and the air quality control system control pH, temperature and air quality in the seed crystal synthesis tank. The device of the iron oxide red seed crystal preparation tank achieves feed liquid purification and automatic control over the pH value and the temperature of seed crystal preparing liquid, and the production cost is saved on the basis of reducing the labor intensity of workers.

Description

technical field [0001] The invention relates to a preparation tank for iron oxide red seed crystals and a preparation method thereof, belonging to the technical field of waste resource treatment. Background technique [0002] Iron oxide red is widely used in ceramics, construction and coating industries. In recent years, due to serious environmental pollution problems, the treatment of various iron-containing waste liquids has attracted the attention of enterprises and the country. The use of iron-containing waste liquids to produce iron red or iron Yellow products have broad development prospects. The preparation process of iron red seed crystals is very important in the iron red production process. If there is no seed crystal involved in the preparation of iron oxide red, only thin and dull color paste without pigment properties can be obtained. Therefore, the preparation of iron red seed crystals is essential. few. Iron oxide red belongs to α-Fe 2 o 3 Crystals, the fo...

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Problems solved by technology

[0003] Before the steel plate is galvanized, the surface of the steel plate is covered with a large number of impurities such as iron oxide and oil stains. These impurities will cause leakage of the steel plate after galvanizing, uneven coating surface, etc., and the performance of the obtained galvanized steel plate will be affected. Therefore, the steel plate Before galvanizing, it is necessary to use a large amount of acid to remove the iron oxide layer on the surface. However, when the concentration of Fe in the waste galvanizing pickling solution reaches about 150g / L, the pickling rate on the surface of the steel plate will decrease, and the pickling solution needs to be re-prepared to Pickling the steel plate, the pickling waste liquid generated in this process contains a large amount of ferrous iron resources, if it is directly discharged, it will cause a waste of resources

At present, the treatment methods of hot-dip galvanizing pickling waste liquid include hydrochloric acid regeneration method, acid-base neutralization method, etc. The treatment process is complicated, the process is long, the treatment cost is high, and resources such as Fe in the solution are not fully utilized.

[0004] Patent CN102557226 uses the waste water produced in the iron red production process to adjust the pH value of the solution through sodium hydroxide solution, concentrate and precipitate, adjust the pH value of the sludge with sodium hydroxide solution, and oxidize to generate brown iron red crystal seeds. Although this method has treated a certain amount waste water resources, reducing the pollution to the environment, but the process of this method is complicated, the synthesis conditions of seed crystals are difficult to control, and it is difficult to synthesize iron red seeds with excellent performance

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