A Method for Establishing a Three-dimensional Polar Coordinate System of Titanium Dioxide Washing and Leach Kinetics Characterized by Washing Strength

Abstract

The invention discloses a method for establishing a three-dimensional polar coordinate system of titanium white washing leaching kinetic for characterizing washing strength. The method comprises the following steps of: constructing two-dimensional polar coordinate system of vacuum suction filtration blade with simplified dimension reduction, and all space-time points in combination with the time coordinate are represented by (t, r, theta); sampling, weighing, drying and digesting different time and space points (t, r, theta) using a standard specific sampler; determining the corresponding ionconcentration using flame atomic absorption spectrophotometer; further processing the concentration-time-area data, and integrate the data of different mineral sources to establish a large database. According to the method for establishing three-dimensional polar coordinate system of titanium white washing leaching kinetic for characterizing washing strength, the invention fills up the gap in thecurrent titanium white production metatitanic acid washing process, optimizes the process conditions of sulfuric acid titanium white washing, reduces the water consumption of the washing process in the sulfuric acid titanium white industry, reduces the process operation power cost and so on and labor costs, and shortens the production cycle of metatitanic acid washing.

Description

technical field [0001] The invention belongs to the technical field of producing titanium dioxide by a sulfuric acid method, and in particular relates to a method for establishing a three-dimensional polar coordinate system for characterizing washing strength and leaching kinetics of titanium dioxide. Background technique [0002] At present in the world, titanium dioxide (TiO 2 ) The production process is mainly two kinds of titanium dioxide by chloride method and titanium dioxide by sulfuric acid method. The production of titanium dioxide by the sulfuric acid method has a history of 90 years. Because of its mature process route, low requirements for the strength of equipment and equipment, and low requirements for the grade of raw materials, it can produce two crystal forms of titanium dioxide, anatase and rutile. The method still has strong vitality and will complement and coexist with the chlorination method for a long time. The important raw material for the productio...

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Problems solved by technology

The water washing equipment used by most manufacturers in this section is a vacuum leaf filter, which is composed of multiple sets of filter plates. Because of the inherent vacuum / suction filter structure of the filter plates, it generally leads to uneven washing of the filter cake.

Only by titrating the ferrous iron content in the filtrate and the experience of front-line workers is far from being able to guide and deal with the washing end point of hydrolyzed materials in different situations

It often leads to two problems: first, the insufficient washing intensity leads to high impurity content, which affects the final quality of titanium dioxide

Second, the washing intensity is too high, resulting in greater water consumption, as well as the operating cost of the vacuum pump and labor costs

[0006] At present, in the metatitanic acid washing section of the sulfuric acid titanium dioxide industry in China, the research on solid-liquid extraction kinetics for different mineral powders and special accidental hydrolysis conditions is obviously insufficient for the inherent structure of the filter plate of the leaf filter, and there is no theoretical support and no research means.

And this problem is related to the production cycle of the titanium dioxide industry, the power consumption of the washing section, the labor cost, especially the consumption of washing water, which is a blank spot in the metatitanic acid washing process of titanium dioxide enterprises.

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