Unlock instant, AI-driven research and patent intelligence for your innovation.

Artificial rutile mother liquor utilization method

A technology of artificial rutile and mother liquor, which is applied in the direction of calcium/strontium/barium sulfate, iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of high equipment investment cost, waste of resources, and low cost of artificial rutile, and achieve scientific Effective utilization and reduction of processing costs

Pending Publication Date: 2021-02-23
LOMON BILLIONS GRP CO LTD
View PDF11 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrochloric acid leaching method can obtain high-grade artificial rutile, but the particle size of the product is too fine, and its side process is long, the production cost is high, and the equipment corrosion is serious in the production process, thus limiting the industrial application of this process
With the continuous development of artificial rutile preparation technology, a method of leaching and reducing ilmenite with titanium white waste acid to prepare artificial rutile, the prepared artificial rutile has low cost, good quality, large output, low equipment requirements, but there are leaching The artificial rutile mother liquor separated out is difficult to deal with. If the obtained artificial rutile mother liquor cannot be properly treated or utilized, it will directly restrict the development of this method.
[0003] Using the sulfuric acid method to leaching and reducing ilmenite with titanium white waste acid to prepare artificial rutile, the separated artificial rutile mother liquor has a high concentration of ferrous sulfate. If it is directly crystallized, due to the high solubility of ferrous sulfate itself, the crystallization will separate ferrous heptahydrate crystals. The rate is only about 30%; the use of concentrated crystallization requires high equipment requirements, high equipment investment costs, and high operating costs. At the same time, the artificial rutile mother liquor contains a small amount of acid and impurities, especially calcium and magnesium impurities, which circulate in the system. The acidity of the mother liquor increases and the impurity content increases. The increase in calcium and magnesium content will cause system scaling and affect the normal operation of the system; while direct neutralization will consume a large amount of limestone or calcium carbide mud and produce a large amount of yellow mud, which is difficult to use. cause waste of resources

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Artificial rutile mother liquor utilization method
  • Artificial rutile mother liquor utilization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Titanium concentrate was reduced at 900°C for 4 hours to control the H in the reaction tail gas 2 The content is greater than 3%, and the metallization rate (Fe 0 / TFe) is 86%, Fe 0 It is 36% reduced titanium concentrate, the concentration of titanium white waste acid is 19%, the reaction ratio of waste acid and reduced titanium concentrate is 1:1 according to the molar ratio of sulfuric acid in waste acid and elemental iron in reduced titanium concentrate, and react at room temperature After 2 hours (at a temperature of 25° C.), solid-liquid separation was carried out, and the solid was washed and dried to obtain artificial rutile. The filtrate was the artificial rutile mother liquor, and the ferrous ion content was 10%.

Embodiment 2

[0047] Titanium concentrate was reduced at 1200°C for 1 hour to control the H in the reaction tail gas 2 The content is greater than 3%, and the metallization rate (Fe 0 / TFe) is 91%, Fe 0 It is 38% reduced titanium concentrate, the concentration of waste acid is 22%, the reaction ratio of waste acid and reduced titanium concentrate is 1:1 according to the molar ratio of sulfuric acid in waste acid to elemental iron in reduced titanium concentrate, and react at 50°C for 1 Hours later, solid-liquid separation is carried out, and the solid is washed and dried to obtain artificial rutile, and the filtrate is the artificial rutile mother liquor with a ferrous ion content of 11%.

Embodiment 3

[0049] (1) get the artificial rutile mother liquor that embodiment 1 obtains under the situation of stirring, press n(SO 4 2- ): n(Ca 2+ ) is 1:1.2 ratio adding 2mol / L calcium chloride solution, press filter after reacting 1.5h, filtrate is ferrous chloride solution, and solid obtains gypsum through washing;

[0050] (2) With the ferrous chloride solution obtained in step (1), adjust the pH value of the solution to 8 with calcium carbide mud, stir and react for 2 hours, and then press filter, the filtrate is a calcium chloride solution, which can be returned to the system to continue Use, the solid is washed with water to obtain ferrous hydroxide;

[0051] (3) Calcining the ferrous hydroxide obtained in step (2) for 1h at 800°C to obtain fine iron powder, the process flow is as follows figure 1 shown.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an artificial rutile mother liquor utilization method which comprises the following steps: S1, taking artificial rutile mother liquor and calcium chloride for mixing reaction to obtain gypsum and ferrous chloride filtrate; s2, taking the ferrous chloride filtrate obtained in the step S1, adding an alkaline calcium substance to adjust the pH value of the solution to 6-9, reacting for 1-4 hours, and carrying out solid-liquid separation to obtain a calcium chloride solution and ferrous hydroxide; and S3, calcining the ferrous hydroxide obtained in the step S2 to obtain fine iron powder. According to the method, the sulfuric acid is used for leaching and reducing the titanium concentrate to prepare the artificial rutile, then the separated ferrous sulfate solution is used for co-producing high-quality gypsum and fine iron powder, a novel synthetic rutile mother liquor recycling circulation mode is formed, the artificial rutile mother liquor is scientifically and effectively utilized, the treatment cost of the artificial rutile mother liquor is greatly reduced, and green circular economy advocated by the country at present is met.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for utilizing artificial rutile mother liquor. Background technique [0002] The production process of titanium dioxide by the chloride method is short, the production capacity is easy to expand, the degree of continuous automation is high, the product quality control is more stable than the sulfuric acid method, the "three wastes" are less, and there are fewer environmental problems. It has become the mainstream production technology of titanium dioxide. With the gradual expansion of the production capacity of the chlorination process, the demand for raw materials is also gradually increasing. At present, there are many methods for the preparation of artificial rutile, but the process is relatively complicated. At present, the main methods that can realize industrialization are reduction corrosion method and acid leaching method. The hydrochloric ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06C01F11/46
CPCC01G49/06C01F11/46C01P2006/80
Inventor 陈建立李珍珍李双庆马丽阳乔丽莎贺高峰豆君
Owner LOMON BILLIONS GRP CO LTD