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Mineral flotation collectors

A collector and flotation technology, used in flotation, solid separation, etc., can solve the problems of lack of selectivity and strong collection ability, and achieve weak collection ability, high metal recovery rate, and improved flotation recovery rate. Effect

Inactive Publication Date: 2010-06-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Xanthate is a common collector for sulfide ore flotation, which has strong collection capacity but lacks selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1N, the preparation of N'-diethylcarboxylate-O, N "-(1,2-ethylene) thiocarbamate thiourea

[0017] 30.54 parts of monoethanolamine plus acetone are configured into a monoethanolamine-acetone solution with a mass concentration of 20%, and slowly added to the solution containing 131.2 parts of N-carboethoxyisothiocyanate at a reaction temperature of 5 to 15°C under stirring conditions. In a three-necked flask, the reaction was stirred for 2 hours, and then the reaction was continued for 4 hours at 40-50° C., and the reaction was completed. After the solvent acetone was distilled off under reduced pressure, 157.5 parts of a yellow product were obtained, which contained 145 parts of N, N'-diethylcarboxylate-O, N"-(1,2-ethylene) thiourethane thiourea, and the product purity 92.1%.

Embodiment 2

[0018] Embodiment 2N, the preparation of N'-dibenzoyl-O, N "-(1,2-ethylene) thiocarbamate thiourea

[0019] Add 30.54 parts of monoethanolamine and tetrahydrofuran to form a monoethanolamine-tetrahydrofuran solution with a mass concentration of 20%, and slowly add it to the solution containing 163.2 parts of N-benzoyl isothiocyanate at a reaction temperature of 5-20°C under stirring conditions. In a three-necked flask, stirred and reacted for 2 hours, then continued to react for 5 hours at 50-60° C., and the reaction was completed. After distilling off the solvent tetrahydrofuran under reduced pressure, 191 parts of yellow products were obtained, which contained 177 parts of N, N'-dibenzoyl-O, N"-(1,2-ethylidene) thiocarbamate thiourea. 92.8%.

[0020] (2) Application of thiourethane and thiourea complex base compounds in mineral flotation

Embodiment 3

[0021] Example 3: A copper ore ore sample, the copper minerals in the ore are mainly chalcopyrite, followed by chalcocite-blue chalcocite, tetrahedrite-arsenite and so on. Iron minerals are mainly pyrite. The raw ore contains 0.43% copper and 2.86% sulfur.

[0022] Test procedure: primary roughing; grinding fineness: -0.074mm, accounting for 68%; chemical conditions: lime dosage 1600 g / ton, pulp pH value 9.0, other chemical conditions and their results are shown in Table 1. The result of the test of table 1 shows, thiourethane thiourea composite base collector of the present invention can obtain than conventional collector butyl xanthate, Z-200 (O-isopropyl-N-ethyl thiocarbamate) and N-ethoxycarbonyl-N'-propylthiourea (monothiourea collector) has higher copper flotation recovery and better selectivity for copper-sulfur separation.

[0023] Table 1 The flotation conditions and results of thiourethane thiourea complex base compound

[0024]

[0025]

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Abstract

The invention provides mineral flotation collectors, namely sulfur ammonia ester thiourea composite-group compounds. The structural formula of the collectors is as follows, wherein R1 represents C1 to C8 alkyl, acyl groups of which the general formula is R3-C(=O)- or ester groups of which the general formula is R40-C(=O)-; R3 and R4 in the structural formula represent C1 to C8 alkyl respectively;and R2 represents C2 to C9 alkylene. Due to a plurality of coordination atoms and coordination groups in collector molecules, the sulfur ammonia ester thiourea composite-group compounds serving as flotation collectors can enhance the flotation, separation and extraction of nonferrous metal ores and precious metal ores and improve flotation efficiency, metal recovery rate and other characteristics.

Description

technical field [0001] The invention relates to a mineral flotation collector-thiocarbamate and thiourea complex base compound. Background technique [0002] Flotation reagent is the key technology for the separation and extraction of valuable mineral components by flotation. As mineral resources become poorer, finer, and miscellaneous, the development of new high-efficiency flotation collectors plays an important role in the development and utilization of complex and refractory ores and in improving the comprehensive recovery rate of metals. [0003] Xanthate is a common collector for sulfide ore flotation, which has strong collection capacity but lacks selectivity. Compared with xanthate, dialkylthiocarbamate (thiocarbamate) has better selectivity, which is beneficial to the comprehensive recovery of beneficial elements such as copper, lead, zinc, gold or silver in sulfide ores. For further improving the flotation performance of thiourethane collector, allyl thiourethane...

Claims

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Application Information

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IPC IPC(8): B03D1/012B03D101/02B03D103/02
Inventor 刘广义钟宏袁露王帅夏柳荫
Owner CENT SOUTH UNIV
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