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Comprehensive recovery method of tin oxide ore gravity separation tailings

A technology for re-separation of tailings and recovery methods, applied in chemical instruments and methods, improvement of process efficiency, solid separation, etc., can solve the problems of serious pollution, low content, and unrecognized attention, and achieve pollution control and low cost of auxiliary materials. Effect

Active Publication Date: 2016-09-07
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 the tailings produced after the gravity separation of tin oxide raw ore. The content of non-ferrous and rare precious metals is between 2.5-3%, and the iron content is about 45%-48%, all of which are relatively low. As a result, it has been neglected as one of the iron-containing solid waste residues. It has been stored 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, and the tailings dam has great potential safety hazards and extremely serious pollution

Method used

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

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Effect test

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] Table 1. Main chemical composition of tin oxide ore gravity separation tailings on dry basis (%)

[0033] 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

[0034] Table 2 is the composition of two example tin oxide gravity separation tailings:

[0035] Table 2 Dry basis main components of two cases of tin oxide gravity separation tailings

[0036]

[0037] The mineral powder i...

example 2

[0056] CaO / SiO after the dried ore powder and auxiliary material batching described in step (2) 2 The ratio is 0.83.

example 3

[0058] 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 a recovery method of mine waste residue, in particular to a comprehensive recovery method of iron-containing solid waste residue. Background technique [0002] Tin oxide ore gravity separation tailings are the tailings produced after the gravity separation of tin oxide raw ore. The content of non-ferrous and rare precious metals is between 2.5-3%, and the iron content is about 45%-48%, all of which are relatively low. As a result, it has been neglected as one of the iron-containing solid waste residues. It has been stored 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, and the tailings dam has great potential safety hazards and extremely serious pollution. Before proposing the present invention, the inventor proposed two invention patents, the comprehensive recovery method of persulfuric acid slag (CN1718750A) and the compre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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