Preparation method for micro-fine particle iron ore reverse flotation collector

A collector and iron ore technology, applied in flotation, solid separation, etc., can solve the problems of low silicon content in ore, low recovery rate of concentrate, high silicate and phosphorus content, and achieve strong collection capacity , The preparation process is simple, and the effect of environmental protection performance is good

Inactive Publication Date: 2017-05-31
SINOSTEEL MAANSHAN INST OF MINING RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] There are still some deficiencies in the patented technology disclosed above, such as the silicate and phosphorus content in the flotation concentrate is too high, the recovery rate of the concentrate is low, or it is suitable for the situation where the silicon content in the ore is low, and the flotation process need to add other auxiliary regulators

Method used

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  • Preparation method for micro-fine particle iron ore reverse flotation collector
  • Preparation method for micro-fine particle iron ore reverse flotation collector
  • Preparation method for micro-fine particle iron ore reverse flotation collector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of collector: react tetradecyl tertiary amine with benzyl chloride at 95°C for 2 hours, then cool to 45°C, add fatty alcohol polyoxyethylene ether nonionic surface active agent accounting for 4% of tertiary amine mass Finally, add diesel oil accounting for 3% of the mass of tertiary amine, and stir evenly at 40°C for 10 minutes to obtain the collector of the present invention.

[0022] The test ore sample is a fine-grained magnetite ore in Australia, the raw ore iron grade is 31.82%, the main gangue mineral is quartz, followed by magnesite and orthoclase. The particle size of the magnetite crystal embedding is extremely fine, and the monomer dissociation can only be achieved by finely grinding to P80 25μm. Firstly, the crude concentrate with an iron grade of about 61% is obtained through stage grinding and stage magnetic separation processes. Further grind the coarse concentrate to -0.038mm particle size content of 85% to 95%, the amount of slurry regulator...

Embodiment 2

[0027] Collector preparation: react cetyl tertiary amine and benzyl chloride at 95°C for 2 hours, then cool to 45°C, add fatty alcohol polyoxyethylene ether nonionic surfactant accounting for 4% of tertiary amine mass, Finally, add diesel oil accounting for 3% of the mass of the tertiary amine, and stir evenly at 40°C for 10 minutes to obtain the collector of the present invention.

[0028] Test ore samples and beneficiation process conditions are the same as in Example 1, and the test results are shown in Table 2.

[0029] Table 2 Laboratory test results

[0030]

[0031] The result in table 2 shows, the collector consumption of the present invention is 200 grams / ton, and when other two kinds of comparison agent consumptions are 250 grams / ton, reverse flotation collector developed by the present invention and cetyl trimethyl Compared with ammonium bromide and 817M (applied on site in Australia), the collector of the present invention has significant advantages in terms of...

Embodiment 3

[0033] The collector of the present invention in Example 2 was applied to the extended re-selection test. The expansion continuous selection test does not add how to adjust the agent, only adds the collector of the present invention, through the first rough and second fine open circuit process, obtains relatively excellent flotation index, and the index of the flotation part is shown in Table 3.

[0034] Table 3 Results of extended re-election test

[0035]

[0036] The experimental results in Table 3 also show that the collector of the present invention has excellent selectivity and strong collection capacity for fine-grained iron ore.

[0037] After the above-mentioned reverse flotation foam product is regrinded, the iron ore is further recovered by magnetic separation, and the magnetic separation tailings are used as the final tailings. Under the condition that the iron grade of the original magnetite ore is 31.82%, the beneficiation technical indicators finally obtaine...

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Abstract

The invention discloses a preparation method for a micro-fine particle iron ore reverse flotation collector. The adopted process steps include that any one of alkyl tertiary amine containing carbon 14 to carbon 18 reacts with benzyl chloride or benzyl bromide accounting for 45%-55% of the mass of the alkyl tertiary amine for 90-150 min under the condition of 90-100 DEG C, cooling is performed till the temperature is 40-50 DEG C, and the alkyl tertiary amine is made to become light-yellow paste; a fatty alcohol polyoxyethylene ether non-ionic surface active agent accounting for 2%-10% of the mass of the alkyl tertiary amine is added in; and finally, diesel oil accounting for 2%-5% of the mass of the alkyl tertiary amine is added in, uniform stirring is performed under the temperature of 35-50 DEG C, cooling is performed till room temperature is achieved, and the collector is obtained. The collector has high collecting force and excellent selectivity on silicate minerals contained in micro-fine particle iron ore, normal floatation can be performed within the temperature of ore pulp ranging from 5 DEG C to 40 DEG C, the adaptive ore pulp acidity and alkalinity range is wide, and normal flotation can be performed while pH ranges from 5 to 11.

Description

technical field [0001] The invention relates to an iron ore reverse flotation collector, in particular to a method for preparing a microfine-grained iron ore reverse flotation silicon-reducing collector. The collector prepared by the method is suitable for fine particle High-efficiency desiliconization of iron ore such as magnetite and hematite by reverse flotation. Background technique [0002] At present, the iron ore reverse flotation agents used in industry mainly fall into the following two categories: [0003] The first is anionic reverse flotation collectors, which are mainly fatty acids or modified fatty acids. During flotation, the pulp temperature must be above 30°C, and sodium hydroxide or sodium carbonate needs to be added to adjust the pH to above 11. Calcium Ions (calcium chloride or lime water) activate quartz-like silicate minerals, and starch (or similar substances to starch, etc.) is used to inhibit the target minerals. The main disadvantage of this metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/008B03D101/02B03D103/02
Inventor 陈玉花潘长远孙炳泉彭小敏王宽魏礼明胡俊高春庆侯更合
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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