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Comprehensive recovery method of gravity separation tailings of tin oxide ore

A technology for gravity separation of tailings and recovery methods, applied in chemical instruments and methods, improvement of process efficiency, solid separation, etc., can solve problems such as serious pollution, low content, and neglect, and achieve pollution control and low cost of auxiliary materials Effect

Active Publication Date: 2015-01-21
云南锐洁鑫再生资源综合利用有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tin oxide ore gravity separation tailings are tailings produced after tin oxide raw ore is re-selected. There are residual chemicals, but this kind of gravity separation tailings contains valuable non-ferrous and rare precious metals between 2.5% and 3%, and the iron content is about 45% to 48%. One, it has not been taken seriously, has been stockpiled for a long time, and has not been rationally utilized. The historical stockpile in Gejiu area of ​​Yunnan Province alone has more than 100 million tons. The tailings dam has great potential safety hazards and extremely serious pollution.

Method used

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  • Comprehensive recovery method of gravity separation tailings of tin oxide ore
  • Comprehensive recovery method of gravity separation tailings of tin oxide ore
  • Comprehensive recovery method of gravity separation tailings of tin oxide ore

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example 1

[0031] (1) Mix the tin oxide tailings with water to form a raw slurry with a water content of 30% and enter it into wet grinding until the solid particle size is 160-200 mesh pulp. After the wet powder is filtered, it is dehydrated in a drying kiln. After drying, the water content of the mineral powder is 6%, as shown in Table 1. Dry basis composition of general tin oxide gravity separation tailings:

[0032] project Fe sn In g / t Ag g / t Cu Pb Zn al 2 o 3 S As SiO 2 CaO content 45-48 0.4～0.8 5～10 12～16 0.3～0.7 0.1 0.5～1 1～3 ＜1 ＜0.1 5～9 1～3

[0033] Table 2 is the composition of two example tin oxide gravity separation tailings:

[0034] Table 2 Dry basis main components of two cases of tin oxide gravity separation tailings

[0035]

[0036] The mineral powder in the example in Table 2 is matched with auxiliary materials: mineral powder, ferric chloride, magnesium chloride, calcium chloride, ammonium chloride,...

example 2

[0055] CaO / SiO after the dried ore powder and auxiliary material batching described in step (2) 2 The ratio is 0.83.

example 3

[0057] According to the principle that the higher the copper content in the tailings slag of the gravity separation of tin oxide ore, the higher the length-to-diameter ratio, the length-to-diameter ratio of the roasting kiln in step (3) should be properly selected in the range of (15-17):1.

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Abstract

The invention relates to a comprehensive recovery method of gravity separation tailings of tin oxide. The comprehensive recovery method comprises the following steps: grinding tailings in a wet type, filtering, performing kiln type drying, mixing ferric chloride, magnesium chloride, calcium chloride, ammonium chloride and coking coal ash with the tailings by virtue of a cylinder, curing and performing high-temperature chlorination and reducing roasting in a kiln to produce magnetic iron ore powder and smoke, performing wet type magnetic separation for recovering iron ore powder containing 60% of iron and silicate tailings, performing water-cooling and absorption and separation on volatilized smoke to recover metal semi-finished product materials rich in tin, copper, silver, molybdenum, indium and the like, evaporating and concentrating circulating liquid to obtain calcium chloride, mixing and recovering. The grade of the iron ore concentrate is 62.08-64.3%, the recovery rate of ferrous and precious metals is 86.5%-96.6%, and the comprehensive recovery method has obvious practical significance.

Description

Technical field [0001] The invention belongs to the recycling method of mining waste residue, especially the comprehensive recycling method involving iron -containing solid waste residues. Background technique [0002] Tin oxidation ore reconstruction tailings are tailings generated by tin oxidation raw ore after re -election. The physical and chemical status of tailings is the same as the raw ore.The price of colored and rare metals is between 2.5 and 3%, and about 45%~ 48%of iron containing iron, and the content is low. As a result, it is not valued as one of the iron solid scum.There are more than 100 million tons of historical stacking in the old regions of Yunnan Province. The hidden safety hazards in the tailings dam are large, and the pollution is extremely serious.Before proposing the present invention, the inventor proposed two invention patents: comprehensive recycling method (CN1718750A) and the winding furnace refining lead tail residue comprehensive recycling method ...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B1/08B03C1/015C22B25/00C22B15/00C22B11/00C22B58/00C22B19/02C22B13/00
CPCY02P10/20
Inventor 池煊庆
Owner 云南锐洁鑫再生资源综合利用有限公司
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