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Low-grade lead-zinc oxidized ore resource utilization method

An oxidized ore, low-grade technology, used in the improvement of process efficiency, cement production and other directions, can solve problems such as long process flow, achieve high comprehensive recovery rate, reduce energy consumption, and reduce production costs.

Inactive Publication Date: 2019-07-19
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the more effective method is the extraction method, and the process is longer.

Method used

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  • Low-grade lead-zinc oxidized ore resource utilization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for resource utilization of low-grade lead-zinc oxide ore, the specific steps are as follows:

[0023] 1) Mixed flotation of sandstone-type oxide ore, raw material composition: Pb 0.95%, Zn 6.28% (of which ZnS zinc content 2.63%, accounting for 41.88% of the total zinc), Fe 5.73%, SiO 2 44.18%; Al 2 O 3 2.01%, CaO 5.45%, MgO 0.29%; ZnS zinc content in tailings after beneficiation is 0.48%, ZnS beneficiation recovery rate is 81.7%, flotation lead-zinc sulfide concentrate Pb+Zn is 55.1%;

[0024] 2) The raw material contains less than 5.73% iron. The mixed flotation tailings are subjected to ferromagnetic separation. After magnetic separation, the iron content of the tailings is 3.58%, and the iron content of the iron concentrate produced by the magnetic separation is 62.1%, which is sold as iron concentrate;

[0025] 3) Magnetic separation tailings, anthracite, limestone, and shale are uniformly mixed and granulated in a weight ratio of 1:0.2:1.8:0.4. The mixture is fed...

Embodiment 2

[0028] A method for resource utilization of low-grade lead-zinc oxide ore, the specific steps are as follows:

[0029] 1) Limestone-type oxide ore is mixed flotation. The raw material composition is: Pb 1.02%, Zn 7.83% (including ZnS zinc content 1.56%, accounting for 19.92% of the total zinc), Fe 12.35%, SiO 2 25.66%; Al 2 O 3 1.78%, CaO 15.79%, MgO 0.3%; ZnS zinc content in tailings after beneficiation is 0.41%, ZnS beneficiation recovery rate is 73.7%, and Pb+Zn content in lead-zinc concentrate is 51.9%;

[0030] 2) The raw material contains 12.35% iron, the mixed flotation tailings are subjected to ferromagnetic separation, the iron content of the ferromagnetic separation tailings is 3.8%, and the iron content of the iron concentrate is 62%, which is sold as iron concentrate;

[0031] 3) Magnetic separation tailings, anthracite, limestone, and shale are mixed uniformly and granulated at a weight ratio of 1:0.1:0.8:0.2. The mixture is fed to the rotary kiln at a speed of 50t / h, an...

Embodiment 3

[0034] A method for resource utilization of low-grade lead-zinc oxide ore, the specific steps are as follows:

[0035] 1) Mix sandstone-type oxide ore and limestone-type oxide ore at a ratio of 1:1. The composition of the mixture is 0.93%, Zn 6.85% (of which ZnS zinc content is 1.88%, accounting for 27.44% of total zinc), Fe 8.52 %, SiO 2 32.63%; Al 2 O 3 2.21%, CaO12.41%, MgO 0.4%; ZnS zinc content in tailings after beneficiation is 0.31%, ZnS beneficiation recovery rate is 83.5%, and Pb+Zn content in lead-zinc sulfide concentrate is 53.6%;

[0036] 2) The raw material contains 8.52% iron, the mixed flotation tailings are subjected to ferromagnetic separation, the iron content of the ferromagnetic separation tailings is 3.2%, and the iron content of the iron concentrate is 65.4%, which is sold as iron concentrate;

[0037] 3) Magnetic separation tailings, anthracite, limestone, and shale are mixed uniformly and granulated at a weight ratio of 1:0.15:1.1:0.2. The mixture is fed to th...

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Abstract

The invention relates to a low-grade lead-zinc oxidized ore resource utilization method and belongs to the field of lead-zinc oxidized ore resource comprehensive utilization. The method comprises thespecific technological steps of conducting crushing and ball milling on low-grade lead-zinc oxidized ores and then conducting bulk flotation to select lead-zinc concentrates and flotation tailings; conducting magnetic separation on the flotation tailings to enable the iron content of the tailings to be 3%-5% and obtaining iron ore concentrates and magnetic separation tailings; adding a finely ground reducing agent, limestone and shale to the magnetic separation tailings to be subjected to even mixing and pelletizing, and conducting lead-zinc reduction volatilization in a rotary kiln to obtainlead-zinc oxide smoke dust through a dust collection system; and feeding kiln slag into a cement kiln to be subjected to calcinating to obtain cement clinker. Through the low-grade lead-zinc oxidizedore resource utilization method, extraction of valuable metals of the low-grade lead-zinc oxidized ores and resource utilization and flotation of volatilizing kiln slag are implemented synchronously,the lead-zinc mixed concentrates and iron concentrates are obtained through flotation and magnetic separation, lead-zinc smoke dust is obtained through lead-zinc enrichment to serve as a raw materialfor lead-zinc metallurgy, cement is produced through reduction volatilization kiln slag calcination, and no waste residues are produced.

Description

Technical field [0001] The invention belongs to the field of comprehensive utilization of resources of lead-zinc oxide ore, and specifically relates to a method for resource utilization of low-grade lead-zinc oxide ore. Background technique [0002] As my country's zinc metal consumption continues to rise, high-grade and high-quality zinc mineral resources are constantly depleting. my country's zinc oxide mineral resources are rich in reserves, but there are many lean ores and few rich ores, which are difficult to deal with. For low-grade oxide ore, due to the variety of minerals, complex ore structure, instability of associated components, and mutual doping, it is not economically feasible for low-grade zinc oxide to be enriched by conventional beneficiation technology. The comprehensive utilization of low-grade lead-zinc ore resources mainly includes pyrotechnical and wet processes. A certain amount of lead resources will also be associated with low-grade zinc oxide ore. From ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/20C22B13/02C22B1/24C04B7/147
CPCC04B7/147C22B1/2406C22B13/02C22B19/20Y02P10/20Y02P40/10
Inventor 杨大锦孙成余贾著红马雁鸿杨伟代龙果李衍林裴启飞赵红梅
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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