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A combined collector for increasing iron and reducing silicon, and its preparation method and application

A combined collector and silicon reduction technology, applied in solid separation, flotation, etc., can solve the problems of low concentrate yield and high silicate content in concentrate, so as to improve production indicators, make up for performance defects, and excellent iron extraction Effect of silicon reduction characteristics

Inactive Publication Date: 2017-02-22
SHANDONG JIANZHU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are more and more reports on the combination of collectors at home and abroad, and new combined collectors are emerging, but there are few in the reverse flotation desilication of iron ore. There are certain deficiencies in the reported technologies, or the obtained refined The ore yield is too low, or the silicate content in the obtained concentrate is too high, and most flotation processes need to add other auxiliary regulators

Method used

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  • A combined collector for increasing iron and reducing silicon, and its preparation method and application
  • A combined collector for increasing iron and reducing silicon, and its preparation method and application
  • A combined collector for increasing iron and reducing silicon, and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: Preparation of A anionic tricarboxylic acid salts:

[0044] Weigh 40g (0.2mol) of saturated fatty acid-lauric acid, place in a 500ml four-necked reaction flask with a thermometer, a condenser, and mechanical stirring, then add 2.76g (0.02mol) of potassium carbonate, triethylbenzylamine salt 3.76g (0.02mol), stir well at room temperature, then control the temperature at 40°C, slowly add 42.35g (0.22mol) of p-toluenesulfonyl chloride with a dropping funnel, react at 40°C for 1 hour, then add 200ml of xylene, Then slowly add citric acid 57.6g (0.3mol) with dropping funnel, reflux reaction 12 hours, the solution is neutralized to pH value 8 with 30% sodium hydroxide, the solid that precipitates, wash with ethanol after suction filtration and obtain It is the product Sodium Lauroyl Citrate.

Embodiment 2

[0045] Embodiment 2: the preparation of A anionic tricarboxylic acid salts:

[0046]Weigh 56.4g (0.2mol) of unsaturated fatty acid-oleic acid, place in a 500ml four-necked reaction flask with a thermometer, a condenser, and mechanical stirring, then add 2.76g (0.02mol) of potassium carbonate, triethylbenzyl 3.76g (0.02mol) of amine salt, stir well at room temperature, then control the temperature at 40°C, slowly add 42.35g (0.22mol) of p-toluenesulfonyl chloride with a dropping funnel, react at 40°C for 1 hour, add 200ml di Toluene, then slowly add citric acid 57.6g (0.3mol) with a dropping funnel, reflux for 10 hours, neutralize the solution with 30% sodium hydroxide to a pH value of 8, and wash the precipitated solid with ethanol after suction filtration What is obtained is the product sodium oleoyl citrate.

Embodiment 3

[0047] Embodiment 3: Preparation of B nitrogen-containing zwitterionic functional group-N-alkylaminodiacetic acids

[0048] Add 48g (0.5mol) of monochloroacetic acid into a 500ml four-necked reaction flask with mechanical stirring, condenser and thermometer, dissolve in 150ml of ethanol and 50ml of water, add 20g (0.5mol) of sodium hydroxide, and stir the reaction After adding phenolphthalein for 1 hour, the color becomes red, then 179.3 g (1.1 mol) of dodecylamine is added through a dropping funnel, and the reaction is carried out under reflux for 10 hours until the color of phenolphthalein disappears. Then use concentrated hydrochloric acid to adjust the pH value to 3-4, and a white precipitate is precipitated, and filtered to obtain the product N-dodecylaminodiacetic acid.

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Abstract

The invention relates to a combined collector capable of increasing iron grade and decreasing silicon content and a preparation method and application thereof. The main component of the combined collector is a combination of three substances, namely A, anionic ternary carboxylate, B, nitrogenous amphoteric ion functional group-N-alkylamino diacetic acid and C, nitrogenous amphoteric ion functional group-N-alkylacyl aminoacetic acid. According to the combined collector capable of increasing the iron grade and decreasing the silicon content and the preparation method and application thereof, a polycarboxyl anion collector is combined with a nitrogenous amphoteric ion collector, so that the synergistic effect of different functional groups is sufficiently utilized, the aim of high-efficiency floatation is achieved through coadsorption and the complementation of the functional groups, the application is simple and convenient, adjusters of other types are not required to be repeatedly added, and the cost is reduced; the combined collector has excellent iron grade increasing and silicon content decreasing characteristics to iron ores, makes up the performance defect of single chemicals and is free from toxic or side effects.

Description

technical field [0001] The invention relates to a combined collector for increasing iron and reducing silicon and its preparation method and application, in particular to the application for improving the grade of iron ores such as magnetite, hematite and ilmenite. Background technique [0002] my country is a country with a large iron ore resource, but the proportion of refractory ore is large, so the concentrator should produce high-quality iron concentrate by selecting a reasonable reagent system and optimizing the flotation process, and at the same time improve the recovery without reducing the grade of the concentrate rate in order to maximize economic benefits. [0003] Since the gangue of iron ore is mainly silicate, the reagents used in iron ore flotation are finally attributed to the collector of silicate minerals. Collectors used in traditional silicate mineral flotation can be divided into anion collectors and cationic collectors from a large classification. Thes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/016B03D101/02
Inventor 任会学孙彦庆张业清刘红军张秀录李虎沈兴玉赵明辉
Owner SHANDONG JIANZHU UNIV
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