Application method of a kind of ester-based hydroxamic acid collector in mineral flotation

A technology of ester hydroxamic acid and ester hydroxime is applied in the application field of ester hydroxamic acid collector in mineral flotation, and achieves the effects of low toxicity, good biodegradation performance and environmental friendliness

Active Publication Date: 2020-01-10
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report about ester hydroxamic acid being used as a flotation collector in the prior art

Method used

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  • Application method of a kind of ester-based hydroxamic acid collector in mineral flotation
  • Application method of a kind of ester-based hydroxamic acid collector in mineral flotation
  • Application method of a kind of ester-based hydroxamic acid collector in mineral flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: the application of 7-ethoxyheptyl hydroxamic acid in rare earth ore flotation

[0040] The ore in a shaking table contains 9.25% REO, and the ore is ground to -0.074mm, accounting for 86%, the concentration of the flotation pulp is 30%, adding 1200g / t sodium carbonate, 700g / t water glass, and the amount of collector 2000g / t , No. 2 oil 70g / t, carry out rare earth roughing flotation, sweep and add 300g / t collector, No. 2 oil 25g / t, add water glass 300g / t for the first selection, add water glass 100g for the second selection / t, flotation process flow chart see figure 1 . Table 1 shows the flotation comparison test results of the ester-based hydroxamic acid collector 7-ethoxyheptyl hydroxamic acid and the commonly used collector salicylic hydroxamic acid in the present invention. It can be seen from Table 1 that compared with the commonly used collector salicylic hydroxamic acid, the recovery rate of REO in rare earth concentrates increased by 4.56 percent...

Embodiment 2

[0043] Embodiment 2: the application of 7-n-pentyl ester group heptyl hydroxamic acid in ilmenite flotation

[0044] An ilmenite containing TiO 2 22.24%, grind the ore to -0.074mm to account for 60%, flotation pulp concentration 30%, add 1800g / t sulfuric acid, collector dosage 450g / t, No. 2 oil 80g / t, carry out roughing flotation of ilmenite Add 50g / t collector for sweeping, 20g / t No. 2 oil, 900g / t sulfuric acid for the first selection, 700g / t sulfuric acid for the second selection, 500g / t sulfuric acid for the third selection, and 500g / t sulfuric acid for the fourth selection. Optionally add sulfuric acid 300g / t, flotation process flow chart see figure 2 . Table 2 shows the flotation comparison test results of the ester group hydroxamic acid collector 7-n-pentyl ester group heptyl hydroxamic acid in the present invention and the commonly used collector octyl hydroxamic acid. It can be seen from Table 2 that compared with the commonly used collector octyl hydroxamic acid,...

Embodiment 3

[0047] Example 3: Application of 7-tridecyl heptyl hydroxamic acid in scheelite flotation

[0048]Put 3.0g of scheelite pure mineral with a particle size of -0.074mm in a 40mL flotation tank, add 30mL of distilled water, stir for 1min to make it evenly mixed, add 3000g / t sodium carbonate to adjust the pH of the pulp and stir for another 2min, then collect Flotation is carried out under the condition that the amount of foaming agent is 200g / t and No. 2 oil of foaming agent is 20g / t. The flotation process flow chart is shown in image 3 . The flotation comparison test results of the ester group hydroxamic acid collector 7-n-tridecyl ester group heptyl hydroxamic acid and commonly used collectors octyl hydroxamic acid and benzyl hydroxamic acid in the present invention are shown in the table 3. It can be seen from Table 3 that the collection ability of 7-tridecylheptylhydroxamic acid, an ester-based hydroxamic acid collector, on scheelite is significantly stronger than that of ...

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Abstract

The invention provides an application method of an ester-based hydroximic acid collecting agent to mineral flotation, and belongs to the technical field of mineral flotation. The structure of the ester-based hydroximic acid collecting agent is shown in the formula I shown in the specification, wherein in the formula I, R is a C1-C17 alkane base or C2-C17 alkylene. Due to the fact that the molecule of the ester-based hydroximic acid collecting agent contains an ester base and a hydroximic acid base, more ligating atoms and more coordinating groups are obtained, through chelation and metal ions, the more stable complex compound can be formed or strong adsorption is formed on the surfaces of metal oxide minerals, and floatation recycling of rare earth ores, titanic iron ores, scheelite, wolframite, scheelite and wolframite mixture ores or tin ores ca be strengthened; compared with an existing hydroximic acid collecting agent, due to the fact that the ester base exists in the molecule, the beneficial effects of being good in biodegradability, small in poisonousness and friendly to the environment are achieved.

Description

technical field [0001] The invention relates to the technical field of mineral flotation, in particular to an application method of an ester-based hydroxamic acid collector in mineral flotation. Background technique [0002] Hydroxamic acid has been used as a mineral flotation agent for nearly 70 years, and plays an important role in the field of mineral flotation. Or tin ore and other flotation applications are the most. [0003] At present, the hydroxamic acids used as flotation collectors mainly include aliphatic hydroxamic acid, benzyl hydroxamic acid and salicylic hydroxamic acid. Sreenivas T et al. studied the flotation performance and adsorption characteristics of aliphatic hydroxamic acid (see structural formula a) on tin ore (Colloid and Surfaces A: Physicochemical and Engineering Aspects, 2002, 205(1-2): 47-59). Qiu Xianyang et al. used benzyl hydroxamic acid (see structural formula b) as a collector to float scheelite and studied the chemical properties of the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/01B03D101/02B03D103/04
CPCB03D1/01B03D2201/02B03D2203/04
Inventor 黄志强邱廷省黄万抚余新阳李立清魏新安王浩林王强强
Owner JIANGXI UNIV OF SCI & TECH
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