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Method for raising grade of rutile by adopting microwave irradiation-magnetic separation-floatation combined process

A combined process, microwave irradiation technology, applied in flotation, chemical instruments and methods, wet separation, etc., can solve the problems of a lot of waste and by-products, large environmental pollution, high consumption of sulfuric acid, and achieve a wide range of effects, environmental protection. Good and low-cost effects

Inactive Publication Date: 2012-02-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the sulfuric acid method is that the process is long, and it can only be operated intermittently; wet operation, high consumption of sulfuric acid and water, a lot of waste and by-products, and great environmental pollution

Method used

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  • Method for raising grade of rutile by adopting microwave irradiation-magnetic separation-floatation combined process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: according to figure 1 As shown in the process flow, 100g of natural rutile ore is dried at 90°C for 20 hours, and then placed in microwave equipment for 20 s of irradiation. The power of the microwave equipment is 1kW and the frequency is 2350MHZ. Quickly put in water to cool to normal temperature and then carry out grinding treatment. The grinding time is 40 minutes. The strength is 3A, and the iron concentrate and enriched rutile ore are obtained; the enriched rutile ore is added to the water quality pulp with a concentration of 20%, and then sulfuric acid with a concentration of 15% is added until the pH value of the rutile pulp is adjusted to 2 , and then add 0.02g of carboxymethylcellulose and 0.025g of hydroxamic acid to float for 3min to obtain excellent grade rutile. The rutile ore after flotation is chemically analyzed to obtain TiO 2 It is an excellent grade rutile ore with a content of 91.5%.

Embodiment 2

[0028] Example 2: according to figure 1 As shown in the process flow, 100g of artificial rutile ore is dried at 120°C for 50 minutes, and then placed in microwave equipment for 60 seconds of irradiation. The power of microwave equipment is 3kW, and the frequency is 2550MHZ. After the water is cooled to normal temperature, the grinding treatment is carried out. The grinding time is 60 minutes. After the grinding treatment, the particle size of the rutile ore is below 200 mesh is 85g; the rutile after the grinding treatment is subjected to magnetic separation, and the magnetic separation current intensity is 5A , to obtain iron concentrate and rutile ore after enrichment; add water to the rutile ore obtained after enrichment until the slurry concentration is 30%, add sulfuric acid with a concentration of 20%, until the pH value of the rutile slurry is adjusted to 3, and then add Carboxymethyl cellulose 0.03 and hydroxamic acid 0.035 are flotation for 8 minutes to obtain excell...

Embodiment 3

[0029] Example 3: according to figure 1 As shown in the process flow, 100g of natural rutile ore is first dried at 100°C for 30 minutes, and then placed in microwave equipment for 40 seconds of irradiation. The power of the microwave equipment is 2kW and the frequency is 2450MHZ. Put into water and cool to normal temperature and carry out grinding treatment, grinding time is 50min, after grinding treatment, the particle size of rutile ore is 90g below 200 mesh; the rutile after grinding treatment is carried out magnetic separation, magnetic separation current intensity is 4A, to obtain iron concentrate and enriched rutile ore; add the enriched rutile ore to water quality pulp with a concentration of 40%, and add sulfuric acid with a concentration of 25% until the pH value of the rutile pulp is adjusted to 2.5, and then add Carboxymethyl cellulose 0.022g and hydroxamic acid 0.03g are floated for 5 minutes to obtain excellent grade rutile. The rutile ore after flotation is ch...

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Abstract

The invention discloses a method for raising the grade of rutile by adopting a microwave irradiation-magnetic separation-floatation combined process, belonging to the field of ore processing. The method comprises the following steps of: putting dried rutile ore into microwave equipment for radiating for 20-60 seconds, quickly cooling with water 20-60 seconds later, performing ore grinding for 40-60 minutes, and magnetically separating the ground rutile ore to obtain iron concentrated ore and enriched rutile ore; and adding a regulating agent into the enriched rutile ore, adjusting the pH value of the rutile ore to 2-3, and adding an inhibiting agent and a collecting agent for floating for 3-8 minutes. Due to the adoption of the microwave irradiation-magnetic separation-floatation combined treatment method, impurities in the rutile ore can be removed, TiO2 in the rutile ore is enriched, the grade of the rutile ore is raised, and rutile ore meeting the industrial premium grade standard can be obtained.

Description

technical field [0001] The invention relates to a method for improving the grade of rutile ore through a microwave irradiation-magnetic separation-flotation combined process, which belongs to the field of mineral processing. Background technique [0002] Titanium dioxide is commonly known as titanium dioxide, and more than 80% of the mined titanium resources are used in the production of titanium dioxide. Titanium dioxide is widely used in various structural surface coatings, paper coatings and fillers, plastics and elastomers, and other uses include ceramics, glass, catalysts, coated fabrics, printing inks and fluxes. [0003] The production methods of titanium dioxide mainly include sulfuric acid method and chlorination method. The production of titanium dioxide by the sulfuric acid method is mainly to produce titanium dioxide sulfate by acidolysis reaction of ferrotitanium powder and concentrated sulfuric acid, which is hydrolyzed to generate metatitanic acid, and then w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B1/00B03D1/016B03D1/008B03D101/06B03D101/02
Inventor 陈菓彭金辉陈晋郭胜惠张利波张泽彪
Owner KUNMING UNIV OF SCI & TECH
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