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Hematite low temperature flotation agent and preparation method thereof

A flotation agent, hematite technology, applied in flotation, carboxylate preparation, solid separation, etc., can solve the problems of cost increase, waste of energy, etc., and achieve energy saving, flotation cost reduction, and low operating temperature Effect

Inactive Publication Date: 2010-01-06
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the current high energy consumption in the beneficiation process of hematite has aroused the attention of scientific researchers, especially the high temperature requirement of the flotation pulp, generally 35 ° C ~ 45 ° C, heating the pulp needs to consume a lot of steam, according to calculations per ton The average heating cost of iron concentrate is 8 yuan. For a concentrator with an annual output of 1 million tons of iron concentrate, the cost of steam consumption is 8 million yuan a year, which not only increases the cost, but also wastes a lot of energy. This is contrary to the country's sustainable development and energy policy

Method used

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  • Hematite low temperature flotation agent and preparation method thereof
  • Hematite low temperature flotation agent and preparation method thereof
  • Hematite low temperature flotation agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The process steps for preparing hematite low-temperature flotation agent are as follows:

[0038] 1. Prepare sodium fatty acid solution

[0039] pentadecanoic acid C 14 h 29 Dissolve COOH in water and prepare pentadecanoic acid solution with a concentration of 1.0 mol / L. Mix and stir the prepared pentadecanoic acid solution with an equal volume of 1.0 mol / L sodium hydroxide solution (that is, pentadecanoic acid and hydrogen Sodium oxide equimolar amount mixes), is prepared into the sodium pentadecanoate solution that concentration is 0.5mol / L, and reaction equation is:

[0040] C 14 h 29 -COOH+NaOH=C 14 h 29 -COONa+H 2 o

[0041] Pentadecanoic acid reacts with sodium hydroxide in equimolar amounts.

[0042] 2. Preparation of hematite collector agent 2-hydroxy 5-octylbenzoic acid ammonium sodium salt C 8 h 17 C 6 h 3 (OH)CONHONa

[0043] Add methyl 2-hydroxy-5-octylbenzoate C to the reactor 8 h 17 C 6 h 3 (OH)COOCH 3 , add hydroxylamine hydrochloride i...

Embodiment 2

[0055] The process steps for preparing hematite low-temperature flotation agent are as follows:

[0056] 1. Prepare sodium fatty acid solution

[0057] Dodecanoic acid C 11 h 23 Dissolve COOH in water and prepare dodecanoic acid solution with a concentration of 0.5mol / L. Mix and stir the prepared dodecanoic acid solution with an equal volume of 0.5mol / L sodium hydroxide solution (that is, dodecanoic acid and hydrogen Sodium oxide equimolar amount mixes), is prepared into the sodium dodecanoate solution that concentration is 0.25mol / L, and reaction equation is:

[0058] C 11 h 23 -COOH+NaOH=C 11 h 23 COONa+H 2 o

[0059] Dodecanoic acid and sodium hydroxide are in equimolar amounts.

[0060] 2. Preparation of hematite collector agent 2-hydroxy-5-butylbenzoic acid amine sodium salt C 4 h 9 C 6 h 3 (OH)CONHONa

[0061] Add methyl 2-hydroxy-5-butylbenzoate C to the reactor 4 h 9 C 6 h 3 (OH)COOCH 3 , add hydroxylamine hydrochloride in an equimolar amount, stir f...

Embodiment 3

[0074] The process steps for preparing hematite low-temperature flotation agent are as follows:

[0075] 1. Prepare sodium fatty acid solution

[0076] octadecanoic acid C 17 h 35 Dissolve COOH in water and prepare octadecanoic acid solution with a concentration of 1.0 mol / L. Mix and stir the prepared octadecanoic acid solution with 5 mol / L sodium hydroxide solution. Equimolar amounts of octadecanoic acid and sodium hydroxide Mix, and be prepared into the sodium octadecanoate solution that concentration is 0.8mol / L, and reaction equation is:

[0077] C 17 h 35 -COOH+NaOH=C 17 h 35 COONa+H 2 o

[0078] 2. Preparation of hematite collector agent 2-hydroxy-5-methylbenzoic acid ammonium sodium salt CH 3 C 6 h 3 (OH)CONHONa

[0079] Add methyl 2-hydroxy-5-methylbenzoate CH to the reactor 3 C 6 h 3 (OH)COOCH 3 , add hydroxylamine hydrochloride in an equimolar amount, stir for 5 minutes at a stirring rate of 2000 rpm, then add 2.5 mol / L sodium hydroxide solution, stir...

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Abstract

The invention relates to a hematite low temperature flotation agent and a preparation method thereof; the agent is the water solution of 2-hydroxyl-5-alkyl-sodium benzoic acid ammonium salt and sodium aliphatate in a ratio of 1:1-3 and the concentration of each solute is not less than 0.02mol / L. The preparation method comprises the following steps: preparing sodium aliphatate solution, preparing hematite collector 2-hydroxyl-5-alkyl-sodium benzoic acid ammonium salt solution, and then mixing the two solutions. The agent can be used for hematite roughing, the dosage is 0.01-0.18% of hematite and the flotation temperature is 20-30 DEG C. the preparation method of the invention has simple method, non-toxic and sate raw materials and stable chemical compositions and properties of the preparedflotation agent.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a preparation method of a low-temperature flotation agent for hematite. Background technique [0002] With the rapid development of the economy, the demand for steel is increasing, and the scale of iron ore beneficiation is increasing. However, the competition in the international market is very fierce, iron ore raw materials are in short supply, and energy is in short supply. All production links are required to reduce costs and reduce energy consumption. Therefore, the current high energy consumption in the beneficiation process of hematite has aroused the attention of scientific researchers, especially the high temperature requirement of the flotation pulp, generally 35 ° C ~ 45 ° C, heating the pulp needs to consume a lot of steam, according to calculations per ton The average heating cost of iron concentrate is 8 yuan. For a concentrator with an annua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/01C07C51/41C07C259/10B03D103/04
Inventor 朱一民王小飞米金月陈先龙
Owner NORTHEASTERN UNIV
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