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Comprehensive recovery technology of multi-metal low-grade ore and ore-bearing waste rock resources thereof

A low-grade, polymetallic technology, applied in the field of metallurgy, can solve problems such as affecting the economic benefits of mines, abandoning them, easy oxidation, etc., to achieve the effect of improving the utilization rate of mineral resources, high production efficiency, and reduced production costs

Active Publication Date: 2015-11-18
YUNNAN HUALIAN ZINC & INDIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the above reasons, a large amount of low-grade ore and ore-bearing waste rocks are often produced during mining of polymetallic mines. If they are directly sent to the dressing plant for treatment, the economic benefits or even losses of mining enterprises will be affected; therefore, ore-bearing waste rocks are generally discharged directly during open-pit mining. In waste rock yards, low-grade ores are often stockpiled nearby and recycled when the technical and economic conditions are ripe. In actual production, due to site constraints and long storage time, easy to oxidize, some low-grade ores have to be discharged to waste rock yards. ; while underground mining low-grade ore and ore-bearing waste rock is often abandoned or used as underground filling

Method used

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  • Comprehensive recovery technology of multi-metal low-grade ore and ore-bearing waste rock resources thereof
  • Comprehensive recovery technology of multi-metal low-grade ore and ore-bearing waste rock resources thereof
  • Comprehensive recovery technology of multi-metal low-grade ore and ore-bearing waste rock resources thereof

Examples

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Effect test

example 1

[0024] Example 1 :Such as figure 1 , the zinc-tin-copper polymetallic ore in a certain area of ​​Yunnan, the low-grade ore and the mineral aggregates in the ore-bearing waste rock have a small particle size, the distribution of metal minerals is relatively concentrated, and the dense disseminated and lamellar structures are the main ones. A small amount is in the form of dense blocks and strips, 60% to 80% of the useful minerals are distributed in 10% to 30% of the mineral aggregates, and the following process is used for recovery: firstly, the ore is sequentially crushed by jaw crusher and impact crushing After the crushing machine is crushed, it is screened by a double-layer vibrating screen, the size of the upper screen is 30mm, and the size of the lower screen is 5mm. The product on the upper screen is returned to the impact crusher for crushing, and the product on the lower screen is crushed by an impact crusher. After crushing, return to the double-layer vibrating scr...

example 2

[0039] Example 2 :Such as figure 2 , Zn-Sn-Cu polymetallic deposits in a certain area of ​​Yunnan, the mineral aggregates in the low-grade ores and waste rocks containing them are small in size, and the distribution of metal minerals is relatively concentrated, mainly in veinlets and plaques, with a small amount of It is a dense massive, striped, and layered structure, 60% to 80% of useful minerals are distributed in 10% to 30% of mineral aggregates, and the following process is used for recovery: firstly, the ore is sequentially used in a jaw crusher 1. After being crushed by the impact crusher, it is fed into the double-layer vibrating screen for screening. The screen size of the upper screen is 25mm, and the screen size of the lower screen is 4mm. The products on the upper screen are returned to the impact crusher for crushing, and the products on the lower screen are After being crushed by the impact crusher, return to the double-layer vibrating screen for screening, an...

example 3

[0054] Example 3 :Such as image 3 , the zinc-tin-tungsten polymetallic ore in a certain area of ​​Yunnan, the particle size of the mineral aggregates in the low-grade ore and the waste rock containing it is small, the distribution of metal minerals is relatively concentrated, mainly scattered spots, spots, and structures, and a small amount is dense Massive, striped and layered structures, 60% to 80% of useful minerals are distributed in 10% to 30% of mineral aggregates, and the following processes are used for recovery: firstly, the ore is sequentially crushed by jaw crusher, counterattack After being crushed by the type crusher, it is fed into the double-layer vibrating screen for screening. The screen size of the upper screen is 20mm, and the screen size of the lower screen is 3mm. After being crushed by the crusher, return to the double-layer vibrating screen for screening, and the product under the lower sieve is the material with a particle size of -3mm; then use the ...

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Abstract

The invention provides a comprehensive recovery technology of multi-metal low-grade ore and ore-bearing waste rock resources thereof, and relates to the field of metallurgy. The technology comprises the steps that materials are smashed to the size fraction of -5 mm through smashing and screening combining equipment, ore washing grading is conducted by adopting equipment combining a screw sand washer and a fine sand recycling machine, two materials of a coarse particle material and ore washing overflow are produced, the particle size of the coarse particle material is controlled to the situation that the content of particles with the size fraction of +0.02 mm is over 90%, and the particle size of the ore washing overflow is controlled to the situation that the content of particles with the size fraction of -0.02 mm is over 90%; grading of the coarse particle material is conducted through a jigging machine, tailings are discarded, and ore concentrate is ore which reaches the economic ore feed grade; desliming is conducted on the ore washing overflow through a hydrocyclone, the overflow particle size of the hydrocyclone is controlled to be -0.01 mm, the content is over 80%, and tailings discarding is conducted directly; hydrocyclone settling sand is graded through a spiral chute after being subjected to slurry mixing through a mixing barrel, tailings are discarded, and ore concentrate is ore which reaches the economic ore feed grade; the purpose of efficiently and economically recycling the low-grade ore and the ore-bearing waste rock resources thereof is achieved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a comprehensive recovery process for low-grade ore and ore-containing waste rock resources in polymetallic mines. Background technique [0002] Low-grade ore refers to the ore whose grade is between the geological cut-off grade and the minimum industrial grade; the cut-off grade is the critical grade for distinguishing ore and waste rock (or rock). The cut-off grade block is waste rock; the minimum industrial grade refers to the lowest average grade that can provide qualified ore for industrial use under the current technical and economic conditions, and the sales income of its products can offset the costs incurred in production, which is the economic Balanced grade; the minimum industrial grade is greater than the cut-off grade. [0003] Polymetallic deposits are generally formed through multi-stage mineralization and evolution. Due to crustal movement and magmatic activity, ore-bear...

Claims

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Application Information

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IPC IPC(8): B02C21/00B02C23/14
Inventor 兰希雄何庆浪赵云魁朱国山李品福洪永华符海桃
Owner YUNNAN HUALIAN ZINC & INDIUM
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