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Characterization method of slag mixing ratio

A technology of mixing ratio and characterization, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of large fluctuation of material ratio, increased production cost, ore and slag offset, etc., to avoid low acid hydrolysis rate, The effect of saving consumption and stable data

Active Publication Date: 2016-12-14
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If industrial production uses slag ore to be mixed first and then acid hydrolyzed, there is a problem of how to accurately characterize the proportion of slag ore in the mixture, because even if titanium slag and ilmenite are mixed according to the planned ratio, after ball milling, dust collection and storage, etc., Ore and slag will shift due to differences in physical properties such as hardness and density, and the ratio of instantaneous materials will fluctuate greatly, which will affect production control such as acid ore ratio and reaction acid concentration
Therefore, at present, titanium dioxide enterprises generally use acid hydrolysis of slag ore separately, and then mix the obtained titanium solution for production, which will cause the following two problems: (1) It is difficult to adjust the content of low-priced titanium: due to the low price of titanium slag The titanium content is 6% to 22%, the fluctuation range is large, the volume ratio of the titanium liquid changes greatly during mixing, and the production operation is difficult; (2) increase the production cost: if the low-priced titanium content in the titanium slag titanium liquid and the titanium ore titanium liquid is first After adjusting to the job requirements and then mixing, the titanium slag and titanium liquid need a certain amount of oxidant, and the titanium ore titanium liquid needs a large amount of reduced iron powder, and the production cost increases significantly.
[0005] At present, there is no method that can accurately characterize the mixing ratio of slag ore

Method used

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  • Characterization method of slag mixing ratio

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Experimental program
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Effect test

Embodiment 1

[0034] In the industrial test process of non-blast furnace smelting titanium-containing slag (medium titanium slag) mixed with ilmenite in low proportion to produce rutile titanium dioxide products, the mass percentage of medium titanium slag was characterized. First, grind medium-titanium slag and ilmenite that are uniformly mixed and relatively stable in composition to +325 mesh and less than 5%, and mix them separately according to the mass ratio of slag ore: 0, 5%, 10%, 13%, 20%, and 30%. Test results are established as figure 1 Standard curve shown. Then in the process of industrial test, the samples of the slag ore mixture after grinding were randomly taken, and the Al 2 o 3 and MgO contents were 1.49% and 6.52%, respectively. Finally follow figure 1 The mass percentages of titanium slag in the mixture detected by the standard curve are 1.51% and 1.49%, respectively, and the data are consistent.

Embodiment 2

[0036] In the industrial test process of non-blast furnace smelting titanium-containing slag (medium titanium slag) mixed with ilmenite in low proportion to produce rutile titanium dioxide products, the mass percentage of medium titanium slag was characterized. First, grind medium-titanium slag and ilmenite that are uniformly mixed and relatively stable in composition to +325 mesh and less than 5%, and mix them separately according to the mass ratio of slag ore: 0, 5%, 10%, 13%, 20%, and 30%. Test results are established as figure 1 Standard curve shown. Then in the process of industrial test, the samples of the slag ore mixture after grinding were randomly taken, and the Al 2 o 3 and SiO 2 The contents are respectively 3.40% and 5.86%. Finally follow figure 1The mass percentages of titanium slag in the mixture detected by the standard curve are 18.38% and 18.34%, respectively, and the data are consistent.

Embodiment 3

[0038] In the process of acid hydrolysis of acid-soluble titanium slag and ilmenite to produce titanium dioxide, the mass percentage of titanium slag in the characterization. First, grind the uniformly mixed and relatively stable titanium slag and ilmenite to less than 5% of +325 mesh, according to the mass ratio of slag ore: 100%, 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, and 50% were mixed separately, and established as figure 2 Standard curve shown. Then, samples of the ground slag ore mixture were randomly taken during the industrial test, and the contents of TFe and CaO were detected to be 18.98% and 1.44%, respectively. Finally follow figure 2 The mass percentages of titanium slag in the mixture detected by the standard curve are 60.11% and 59.75%, respectively, and the data are consistent.

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Abstract

The invention relates to a slag and ore blending ratio characterization method and belongs to the field of titanium dioxide production. The slag and ore blending ratio characterization method aims at achieving slag and ore blending ratio characterization after feeding is carried out based on the ratio in the production process. The method comprises the steps that a, titanium slag and titanium iron ore are blended according to different slag and ore mass ratios, a series of mixtures of different slag and ore mass ratios are obtained, the content of specific components in the mixtures is measured, and a standard curve between the slag and ore mass ratios and the specific component content is built; b, the content of the specific components of the mixtures to be measured is measured; c, the standard curve is searched for the corresponding slag and ore mass ratio according to the content of the specific components of the slag and ore mixtures measured in the step b. By means of the slag and ore blending ratio characterization method, the slag and ore blending ratio obtained after feeding is carried out based on the ratio in the industrial production process can be rapidly analyzed, data are stable, errors are small, slag and ore blending acidolysis titanium dioxide production is applicable to industrial large-scale production, and cleaning development of titanium dioxide production adopting the sulfuric acid method is facilitated.

Description

technical field [0001] The invention relates to a characterization method for the mixing ratio of slag ore, belonging to the field of titanium dioxide production. Background technique [0002] The production of titanium dioxide with titanium slag as raw material can eradicate the environmental protection problems of sulfuric acid process titanium dioxide greenite. However, due to the high price of titanium slag, it seriously affects the production cost of titanium dioxide. Therefore, many titanium dioxide enterprises choose titanium slag and titanium ore. The raw materials are mixed to produce titanium dioxide. There are usually two organizational methods for the mixed production of titanium dioxide by slag ore: (1) the titanium solution obtained by acid hydrolysis of slag ore separately and then mixed; (2) the slag ore is mixed first and then acidified. If industrial production uses slag ore to be mixed first and then acid hydrolyzed, there is a problem of how to accuratel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047
Inventor 杜剑桥徐玉婷石瑞成罗志强李礼张强
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP