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A method for simultaneous separation of tin and iron from tin-containing iron tailings

A synchronous separation and tailings technology, applied in chemical instruments and methods, solid separation, magnetic separation, etc., can solve the problems of high cost and low separation efficiency

Active Publication Date: 2015-10-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at a series of defects such as low separation efficiency and high cost in the process of processing tin-iron tailings in the prior art, the purpose of the present invention is to provide a kind of tin-iron tailings as raw material, which can realize high efficiency of iron and tin in tin-iron tailings. Separation, less pollution, and low cost method, this method realizes the deep comprehensive utilization of resources and meets the requirements of industrial production

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  • A method for simultaneous separation of tin and iron from tin-containing iron tailings

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Experimental program
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Effect test

Embodiment 1

[0038] First, the tin-containing iron tailings (0.55% tin grade, 40.21% iron grade) are dehydrated and dried to a certain amount of moisture, and then compound additives that account for 10% of the mass percent of the tailings (dry basis) are added (the mass ratio of different components is sulfuric acid Sodium: borax: sodium fulvic acid = 10%: 70%: 20%), after the materials are mixed evenly, agglomerate, dry; the agglomerate after drying is put into roasting furnace, feed into nitrogen protection, be warming up to 900 ℃, after the temperature is stabilized, O 2 Volume concentration [O 2 / (O 2 +N 2 )]×100% is 10% mixed gas roasting for 35min, then lowering the temperature to 750°C, feeding the volume concentration of CO in the reducing gas [CO / (CO+CO 2 )]×100% is 5%, and the roasting time is 25min. 2 After cooling under the atmosphere, grind to 80% less than 0.074mm, and magnetically separate under the condition of magnetic field strength of 1000Gs. A magnetite concentrat...

Embodiment 2

[0040] First, the tin-containing iron tailings (tin grade 0.83%, iron grade 34.21%) are dehydrated and dried to a certain amount of water, and then compound additives that account for 7% of the tailings (dry basis) by mass (the mass ratio of different components is sulfuric acid Sodium: borax: sodium fulvic acid = 20%: 50%: 30%), after the materials are evenly mixed, agglomerate, dry; the agglomerate after drying is put into the roasting furnace, pass into nitrogen protection, be warming up to 850 ℃, after the temperature is stabilized, O 2 Volume concentration [O 2 / (O 2 +N 2 )]×100% is 21% mixed gas roasting for 40min, then lowered the temperature to 550°C, and introduced the volume concentration of CO in the reducing gas [CO / (CO+CO 2 )] × 100% is 25%, and the roasting time is 65min. 2 After cooling under the atmosphere, grind to 80% less than 0.074mm, and magnetically separate under the condition of magnetic field strength of 800Gs to obtain iron concentrate with an iro...

Embodiment 3

[0042] First, the tin-containing iron tailings (1.13% tin grade, 42.24% iron grade) are dehydrated and dried to a certain amount of water, and then compounded with 8% of the tailings (dry basis) mass percentage (the mass ratio of different components is sulfuric acid Sodium: borax: sodium fulvic acid = 15%: 63%: 22%), after the materials are mixed evenly, agglomerate, dry; The agglomerate after drying is put into roasting furnace, feeds nitrogen protection, is heated up to 800 ℃, after the temperature is stabilized, O 2 Volume concentration [O 2 / (O 2 +N 2 )]×100% is 40% mixed gas roasting for 65min, then lowering the temperature to 700°C, feeding the volume concentration of CO in the reducing gas [CO / (CO+CO 2 )]×100% is 10%, and the roasting time is 55min. 2 After cooling under the atmosphere, grind to 80% less than 0.074mm, and magnetically separate under the condition of magnetic field strength of 1500Gs. An iron concentrate with an iron grade of 60.34% (with a tin gra...

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Abstract

The invention discloses a method for synchronously separating tin and iron from tin-containing iron tailings. The method comprises the following steps: evenly mixing the tin-containing iron tailings with a composite additive consisting of sodium sulfate, sodium borate and sodium fulvate according to a certain ratio; carrying out agglomeration, and drying the mixture; sequentially carrying out oxidizing roasting, reducing roasting and magnetic separation, so as to obtain iron ore concentrate of which the tin residue is lower than 0.08% and tin-rich tailings of which the grade is greater than 1%, wherein the recovery rate of iron can be over 80%, and efficient separation of iron and tin in the tin-containing iron tailings is achieved. The method is small in pollution, and low in cost, and is especially suitable for treatment of tin-containing iron tailings resources, which are close in symbiotic relationship of tin and iron, and are difficult to separate and recover by an existing beneficiation method, and deep comprehensive utilization of the tin-containing iron tailings resources is achieved.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of tin-containing iron tailings, in particular to a method for separating tin and iron from tin-containing iron beneficiation tailings by using a combined roasting method of oxidation roasting and then magnetization roasting, which belongs to mineral processing and nonferrous metals metallurgical field. Background technique [0002] The typical characteristics of my country's tin ore resources are: most of them are skarn-type vein tin deposits with deep burial and overlapping distribution. Cassiterite, silicon, calcium and other gangue minerals and various metal minerals are symbiotic and closely associated, so mining and beneficiation And the difficulty and high cost of smelting. At present, the domestic tin ore reserves are about 3 million tons, while the recoverable reserves are only about 1.5 million tons. Due to the long-term mining and the weakening of geological work in recent year...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B25/06C22B1/02B03C1/015
CPCY02W30/54Y02P10/20
Inventor 姜涛张元波李光辉苏子键刘兵兵陈军范晓慧黄柱成郭宇峰杨永斌李骞陈许玲彭志伟徐斌甘敏游志雄周友连杜明辉
Owner CENT SOUTH UNIV