Method for resource utilization of lead-zinc ore waste rocks

A lead-zinc mine and resource-based technology, applied in the field of mineral processing, can solve the problems of high cost, difficulty in crushing and grinding, and lack of market competitiveness, and achieve low production cost, large production scale, and significant social and ecological benefits. Effect

Pending Publication Date: 2022-04-29
GUANGXI ZHONGJIN LINGNAN MINING CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since lead-zinc ore waste rocks are mostly hard rocks with large particle sizes, it is difficult to crush and grind them, so t

Method used

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  • Method for resource utilization of lead-zinc ore waste rocks

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Comparison scheme
Effect test

Example Embodiment

[0023] Example 1:

[0024] A method for preparing low-quality dolomite from waste lead-zinc ore (27.06％CaO, 18.15％MgO, 1.43% S, 0.29% Zn, 0.1% Pb) for iron ore sintering production includes the following steps:

[0025] Step 1: Preparation of low-quality dolomite

[0026] Jaw crusher was used to crush waste lead-zinc ore. After crushing, low-quality dolomite with particle size of -3mm and content of 58.81% was obtained.

[0027] Step 2: Ore blending

[0028] The proportions of iron ore powder, limestone, dolomite, low-quality dolomite (prepared in the first step), quicklime, coke powder and return ore are 58.83%, 6.89%, 2.39%, 1.71%, 3.00%, 4.10% and 23.08%, respectively. The alkalinity of fixed sinter is 1.95, and the mixed materials. 2 The content is 5.5%, MgO content is 1.8%, low-quality dolomite obtained by crushing waste rocks is used to replace 40% of traditional dolomite for sintering, and the moisture content of the mixture is 8.5%.

[0029] Step 3: Mix well.

[0030] Iron...

Example Embodiment

[0036] Example 2:

[0037] A method for preparing low-quality dolomite from waste lead-zinc ore (27.06％CaO, 18.15％MgO, 1.43% S, 0.29% Zn, 0.1% Pb) for iron ore sintering production includes the following steps:

[0038] Step 1: Preparation of low-quality dolomite

[0039] Jaw crusher and counter-roller crusher were used to crush the waste rock of lead-zinc mine. After crushing, the low-quality dolomite with particle size of -3mm and content of 100% was obtained.

[0040] Step 2: Ore blending

[0041] The proportions of iron ore powder, limestone, dolomite, low-quality dolomite (prepared in the first step), quicklime, coke powder and return ore are 58.83%, 6.89%, 2.39%, 1.71%, 3.00%, 4.10% and 23.08% respectively, and the alkalinity of fixed sinter is 1.95. Among the raw materials 2 The content is 5.5%, MgO content is 1.8%, low-quality dolomite obtained by crushing waste rocks is used to replace 40% of traditional dolomite for sintering, and the moisture content of the mixture is 8...

Example Embodiment

[0049] Example 3:

[0050] A method for preparing low-quality dolomite from waste lead-zinc ore (27.06％CaO, 18.15％MgO, 1.43% S, 0.29% Zn, 0.1% Pb) for iron ore sintering production includes the following steps:

[0051] Step 1: Preparation of low-quality dolomite

[0052] Jaw crusher was used to crush waste lead-zinc ore. After crushing, low-quality dolomite with particle size of -3mm and content of 83.49% was obtained.

[0053] Step 2: Ore blending

[0054] The proportions of iron ore powder, limestone, dolomite, low-quality dolomite (prepared in the first step), quicklime, coke powder and return ore are 58.67%, 7.00%, 1.60%, 2.55%, 3.00%, 4.10% and 23.08% respectively, and the alkalinity of fixed sinter is 1.95. Among the raw materials 2 Content is 5.5%, MgO content is 1.8%, low-quality dolomite obtained by crushing waste rocks is used to replace 60% of traditional dolomite for sintering, and the moisture content of the mixture is 8.5%.

[0055] Step 3: Mix well.

[0056] Iron o...

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Abstract

The invention discloses a lead-zinc ore waste rock resource utilization method which comprises the following steps: S1, crushing lead-zinc ore waste rock to obtain low-quality dolomite; or roasting the lead-zinc ore waste rock, and crushing after roasting to obtain low-weight light-burned dolomite; s2, blending the iron ore powder, return mine, a flux and coke powder to obtain a sintering raw material; wherein the flux contains low-quality dolomite or low-quality light-burned dolomite; s3, uniformly mixing the sintering raw materials to obtain a uniformly premixed material; s4, granulating the mixture to obtain a granulated material; and S5, distributing, igniting and sintering the granulated material in a sintering cup, and then cooling, crushing and screening to obtain the finished product sintered ore. According to the method, the lead-zinc ore waste rock is used for preparing the dolomite and light-burned dolomite products for sintering, the low-quality dolomite can be prepared only through mechanical crushing, or the low-quality light-burned dolomite can be fired through a conventional roasting process, the technological process is simple, the production cost is low, and high technical and economic feasibility is achieved.

Description

technical field [0001] The invention belongs to the field of mineral processing, and in particular relates to a method for resource utilization of lead-zinc ore waste rock. Background technique [0002] my country's lead-zinc ore resources are mainly lean ores with a lead and zinc grade of about 3% to 8%, and there are many co-associated components. In order to reduce the amount of subsequent mineral processing and reduce the cost of grinding, it has become the first choice for lead-zinc mineral processing to throw out most of the waste rock from the raw ore in the crushing section in advance, and the discarding rate can reach 20% to 60%. % or so, the output of waste rock is huge. According to the "Solid Waste Pollution Prevention and Control Law", waste rocks of lead-zinc mines are typical solid wastes, and it is required that "mining enterprises should adopt scientific mining methods and mineral processing techniques to reduce the production of tailings, waste rocks and o...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B1/20
CPCC22B1/2406C22B1/20
Inventor 李小元杨聪聪何晋勇朱德庆刘兵潘建钟旭群郭正启苏振华王欣谈承忠
Owner GUANGXI ZHONGJIN LINGNAN MINING CO LTD
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