Classification comprehensive utilization method for copper ore waste rocks

Abstract

The invention provides a grading and classifying comprehensive utilization method for copper ore waste rocks, which comprises the following steps: crushing and screening the waste rocks to obtain a product with the particle size of-120 + 30mm, a product with the particle size of-30 + 10mm and a product with the particle size of-10mm; the-120 + 30 mm fraction product is subjected to X-ray sorting, and a sorted copper-rich high-sulfur product and a-120 + 30 mm low-sulfur product are obtained; carrying out jigging reselection on the-30 + 10 mm fraction product to obtain a reselected copper-rich high-sulfur product and a-30 + 10 mm low-sulfur product; and jigging and reselecting the product with the particle size of-10mm to obtain a reselected copper-rich high-sulfur product and a low-sulfur product with the particle size of-10mm. The method comprises the steps of waste rock classification, X-ray large block separation and medium and fine particle gravity separation for copper collection, copper-rich high-sulfur products separated from raw materials of different particle fractions are combined as recovered copper ore, and the recovered copper ore is returned to a separation plant for processing; the two-stage process is utilized, the number of equipment is small, the treatment capacity is large, the flow structure is simple, the operation cost is low, and production management is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of copper mine waste rock recovery, in particular to a comprehensive utilization method for grading and classifying copper mine waste rock. Background Art

[0002] The stockpile of copper mine waste rock in China is about 2 billion tons, and there are the following problems: on the one hand, low-grade copper ore cannot be economically recovered, and useful minerals and materials cannot be fully utilized, resulting in waste of resources; on the other hand, under specific conditions, sulfides oxidize to produce acid, and associated heavy metal elements dissolve to produce acidic wastewater with excessive heavy metal ions, causing potential safety and environmental protection hazards. Therefore, the reduction, resource utilization, and harmless treatment of copper mine waste rock are of great significance. The comprehensive utilization of copper mine waste rock is conducive to large-scale disposal of solid waste, solving the environmental protection problems of enterprises, and increasing the economic benefits of enterprises.

[0003] The mineral composition of copper mine waste rock mainly includes calcite, dolomite, quartz, etc., accompanied by a small amount of orthoclase, amphibole, chlorite, mica, pyrite, etc. The distribution of copper-bearing minerals is closely related to the color characteristics of waste rock. Copper-bearing ore is mainly dark yellow, and obvious yellow chalcopyrite patches can be seen on the surface of some waste rock. The surrounding rock and gangue minerals are mainly black or white, and the copper and sulfur grades are low. How to simplify the process flow, increase the waste rock treatment capacity, and reduce the operation cost at the same time is a problem that needs to be solved. Summary of the Invention

[0004] The present invention provides a comprehensive utilization method for grading and classifying copper mine waste rock, which uses two-stage processes, has a small number of equipment, a large processing capacity, a simple process structure, a low operation cost, and is convenient for production management.

[0005] The technical solution of the present invention is realized as follows: a comprehensive utilization method for grading and classifying copper mine waste rock, comprising the following steps:

[0006] (1) Crushing and screening the waste rock to obtain products with particle sizes of -120 + 30 mm, -30 + 10 mm, and -10 mm;

[0007] (2) The product with a particle size of -120 + 30 mm enters X-ray sorting to obtain a sorted copper-rich and high-sulfur product and a -120 + 30 mm low-sulfur product;

[0008] (3) The product with a particle size of -30 + 10 mm undergoes jigging gravity separation to obtain a gravity separation copper-rich and high-sulfur product and a -30 + 10 mm low-sulfur product;

[0009] (4) The product with a particle size of -10 mm undergoes jigging gravity separation to obtain a gravity separation copper-rich and high-sulfur product and a -10 mm low-sulfur product.

[0010] Further, in step (2), the -120 + 30 mm low-sulfur product is crushed and screened to obtain -30 + 10 mm aggregate and -10 mm aggregate.

[0011] Further, the -10 mm aggregate is combined with the -10 mm low-sulfur product in step (4), and after screening and crushing, -4.75 mm manufactured sand is obtained.

[0012] Further, the -30 + 10 mm aggregate is subjected to optoelectronic color sorting to obtain -30 + 10 mm low-sulfur aggregate and -30 + 10 mm secondary aggregate.

[0013] Advantages of the present invention:

[0014] The present invention is applicable to the treatment of the boundaries and surrounding rocks of unevenly mineralized veins and evenly mineralized veins in skarn-type copper mines, and can be popularized and applied in the waste rock fields of skarn-type copper mines such as Wushan, Chengmenshan Copper Mine in Jiangxi, and Daye in Hubei.

[0015] The present invention has two processes for waste rock recovery of copper ore and processing and utilization of waste rock after copper recovery. It has a small number of equipment, a large processing capacity, a simple process structure, low operating costs, and is convenient for production management. The waste rock grading - X-ray large block sorting - medium and fine particle gravity separation for copper recovery of the present invention means that the copper ore waste rock is crushed and screened into three particle size grade products of -120 + 30 mm, -30 + 10 mm, and -10 mm for sorting. The sorted copper-rich and high-sulfur products of different particle size raw materials are combined as the recovered copper ore and returned to the concentrator for processing. The sorted low-sulfur products of different particle size raw materials are processed through crushing - screening - optoelectronic color sorting, etc., to obtain low-sulfur aggregate, secondary aggregate, and manufactured sand, which are disposed and consumed through ways such as road bedding and cement admixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is the process flow diagram of Embodiment 1 of the present invention;

[0018] Figure 2 It is the process flow diagram of Embodiment 2 of the present invention;

[0019] Figure 3 It is the process flow diagram of Embodiment 3 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Example 1

[0022] As Figure 1 shown, a comprehensive utilization method for grading and classifying copper mine waste rocks includes the following steps:

[0023] (1) Crushing and screening the waste rocks to obtain products with particle sizes of -120 + 30 mm, -30 + 10 mm, and -10 mm;

[0024] (2) The product with a particle size of -120 + 30 mm enters X-ray sorting to obtain a copper-rich and high-sulfur product and a -120 + 30 mm low-sulfur product;

[0025] (3) The product with a particle size of -30 + 10 mm in step (1) is subjected to jigging gravity separation to obtain a gravity separation copper-rich and high-sulfur product and a -30 + 10 mm low-sulfur product;

[0026] (4) The product with a particle size of -10 mm in step (1) is subjected to jigging gravity separation to obtain a gravity separation copper-rich and high-sulfur product and a -10 mm low-sulfur product.

[0027]

[0028] The feed copper grade is 0.272%, the sulfur grade is 3.03%, the raw material is screened into three particle size products of -120 + 30 mm, -30 + 10 mm, and -10 mm. The product with a particle size of -120 + 30 mm is sorted by X-ray to obtain a copper-rich and high-sulfur product and a low-sulfur product. The two particle size products of -30 + 10 mm and -10 mm are sorted by jigging to obtain a copper-rich and high-sulfur product and a low-sulfur product. The copper-rich and high-sulfur products of the three particle sizes are combined to obtain a copper ore yield of 34.17% with a particle size of -120 mm, a copper grade of 0.721%, a sulfur grade of 6.03%, a copper recovery rate of 90.49%, a sulfur recovery rate of 68.01%, and a copper enrichment ratio of 2.65. The sulfur grades of the low-sulfur products of the three particle sizes are 1.58%, 1.30%, and 1.29% respectively.

[0029] Example 2

[0030] This embodiment is basically the same as Embodiment 1, except that, as Figure 2 shown, it further includes the following steps:

[0031] The -120 + 30 mm low-sulfur products in step (2) are crushed and screened to obtain products with a particle size of +30 mm, -30 + 10 mm aggregate, and waste rock with a particle size of -10 mm. The products with a particle size of +30 mm are returned to the crushing operation; the -10 mm aggregate is combined with the -10 mm low-sulfur products in step (4) and, after screening and crushing, -4.75 mm manufactured sand is obtained.

[0032] Example 3

[0033] This example is basically the same as Example 1, except that, as Figure 3 shown, the -30 + 10 mm aggregate is subjected to optoelectronic color sorting to obtain -30 + 10 mm low-sulfur aggregate and -30 + 10 mm secondary aggregate.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A comprehensive utilization method for grading and classifying copper mine waste rock, characterized in that, It includes the following steps: (1) Crushing and screening waste rock to obtain products with particle sizes of -120 + 30 mm, -30 + 10 mm, and -10 mm; (2) The -120 + 30 mm particle size product enters X-ray sorting to obtain a sorted copper-rich and high-sulfur product and a -120 + 30 mm low-sulfur product; (3) The -30 + 10 mm particle size product undergoes jigging gravity separation to obtain a gravity-separated copper-rich and high-sulfur product and a -30 + 10 mm low-sulfur product; (4) The -10 mm particle size product undergoes jigging gravity separation to obtain a gravity-separated copper-rich and high-sulfur product and a -10 mm low-sulfur product.

2. The comprehensive utilization method for classification of copper mine waste rock according to claim 1, wherein, In step (2), the -120 + 30 mm low-sulfur product is crushed and screened to obtain -30 + 10 mm aggregate and -10 mm aggregate.

3. A comprehensive utilization method for grading and classifying copper mine waste rock according to claim 2, characterized in that, The -10 mm aggregate is combined with the -10 mm low-sulfur product in step (4) and, after screening and crushing, -4.75 mm manufactured sand is obtained.

4. A comprehensive utilization method for grading and classifying copper mine waste rock according to claim 2 or 3, characterized in that, The -30 + 10 mm aggregate undergoes optoelectronic color sorting to obtain -30 + 10 mm low-sulfur aggregate and -30 + 10 mm secondary aggregate.

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