Quartz vein type copper-containing waste rock resource utilization method

Abstract

The invention relates to a method for resource utilization of quartz vein type copper-containing waste rock, which comprises the following steps of: crushing and screening the quartz vein type copper-containing waste rock, selecting concentrate copper ore of copper-containing and sulfur-containing ores accounting for most of coarse fraction by using an X-ray concentrating machine, and feeding the concentrate copper ore to a concentrating mill for further beneficiation; the tailings are further crushed into fine sand which can be used as sand for buildings, a small amount of screened fine-fraction products are used for underground filling, and the specific steps and conditions are as follows: the copper-containing waste rocks are subjected to coarse crushing and intermediate crushing, and the granularity of the intermediate-crushed final product is controlled to be below 60-80mm; the final intermediate crushed product is subjected to vibration screening, the size of a screen is 20-30 mm, and oversize products and undersize products are screened out; the oversize products are fed into an X-ray concentrating machine to be separated, concentrate copper ore is obtained and fed into a concentrating mill to be further subjected to mineral separation, copper concentrate is obtained, tailings are gravel with the extremely low sulfur content, and the undersize products serve as underground filling materials; the tailings separated by the X-ray concentrating machine are further crushed and made into sand, the particle size is controlled to be-5mm, the sand is used as sand for construction, and the method has the advantages that valuable elements such as copper can be efficiently recycled, and copper-containing waste rocks can be efficiently recycled.

Description

Technical Field

[0001] The invention relates to the technical field of copper-containing waste rock beneficiation and resource utilization, and in particular to a method for resource utilization of quartz vein type copper-containing waste rock. Background Art

[0002] According to statistics, for every ton of ore mined in my country's non-ferrous metal mines, 1.25 tons of waste rock will be produced, and the annual output of waste rock is as high as 106 million tons. At present, the total amount of mining waste rock stored in 153 cities in my country exceeds 7.1 billion tons, of which the amount of copper mine waste rock is about 2 billion tons. On the one hand, the low-grade valuable metals in the waste rock cannot be economically recovered, and the useful minerals and material properties are not fully utilized, resulting in a waste of resources; on the other hand, under certain conditions, the sulfides in the waste rock accelerate oxidation and acid production, and the mineralizing elements and associated heavy metal elements are activated and dissolved to produce acidic wastewater with excessive heavy metal ions, which is easy to cause environmental pollution hazards. Quartz vein copper ore is a common type of copper ore in my country. The waste rock produced by its mining often contains a small amount of copper and sulfur minerals, resulting in high sulfur content. It cannot be used as a building material. At present, it can only be used for underground filling or surface storage. The copper and sulfur resources in it cannot be effectively utilized, and there is a risk of environmental pollution. That is, the existing copper-containing waste rock utilization technology is partially used for underground filling.

[0003] After searching by the inventor, no prior literature was found on the use of X-ray concentrators for resource utilization of copper-containing waste rock.

[0004] Therefore, it is of great significance to develop a low-cost, environmentally friendly and efficient method for resource utilization of quartz vein-type copper-containing waste rock. Summary of the invention

[0005] The task of the present invention is to overcome the deficiencies of the prior art and propose a method for resource utilization of quartz vein type copper-containing waste rock, which can not only reduce the amount of waste rock in non-ferrous metal mines and recycle it, but also be environmentally friendly.

[0006] A method for resource utilization of quartz vein type copper-containing waste rock, in view of the problems of high quartz content and small amount of copper and sulfur in the waste rock, the quartz vein type copper-containing waste rock is crushed to a certain particle size and screened, and then the copper and sulfur ores in the coarse particle size, which account for the vast majority, are selected by an X-ray concentrator, and the concentrate is the copper ore, which can be sent to the concentrator for further concentrating, so as to realize the efficient recovery of valuable elements such as copper; the tailings are further crushed into fine sand, which can be sold as construction sand, and the fine particle size product with a small amount after screening is used for underground filling, so as to realize the efficient resource utilization of the copper-containing waste rock, including the following specific steps and conditions:

[0007] (1) Copper-containing waste rock is subjected to coarse crushing and medium crushing, and the particle size of the final product of the medium crushing is controlled to be below 60-80 mm;

[0008] (2) The final product of the medium crushing is screened through a vibrating screen, the screen size is controlled to be 20-30 mm, and the products larger than 20-30 mm and the products smaller than 20-30 mm are screened out;

[0009] (3) The screened products with a diameter of more than 20 to 30 mm are fed into an X-ray concentrator for separation. The obtained concentrate is copper ore, which is sent to a concentrator for further separation to obtain copper concentrate. The tailings are sand and gravel with extremely low sulfur content. A small amount of products with a diameter of less than 20 to 30 mm can be used as underground filling materials.

[0010] (4) The tailings separated by the X-ray concentrator are further crushed and sanded, and the particle size is controlled at -5mm, and can be sold as construction sand.

[0011] The innovation of the present invention lies in: using an X-ray concentrator to first select out the copper and sulfur-containing ores in large quantities, and the concentrate is the copper ore, which can be sent to a concentrator for further concentrating, thereby realizing efficient recovery of valuable elements such as copper; secondly, the tailings are further crushed into fine sand, which can be sold as construction sand; finally, the fine-grained products in small quantities after screening are used for underground filling, thereby realizing efficient resource utilization of copper-containing waste rock.

[0012] Compared with the prior art, the present invention has the following advantages or effects:

[0013] After it is crushed to a certain particle size and screened, the coarse-grained products accounting for 70-90% are intelligently sorted by X-ray concentrators, turning waste into treasure, and the concentrate is copper ore, which can be sent to the concentrator for further beneficiation, so that valuable elements can be efficiently recovered, production costs are low, and it is environmentally friendly and pollution-free; at the same time, since the tailings are further crushed into fine sand, they can be sold as construction sand; in addition, since the fine-grained products accounting for 10-30% of the screening are used for underground filling, the resource utilization efficiency is high, and the copper-containing waste rock realizes full factor utilization.

[0014] The % mentioned in the application documents refers to mass percentage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of a process flow of a method for resource utilization of quartz vein type copper-containing waste rock.

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0017] like Figure 1As shown, a method for resource utilization of quartz vein type copper-containing waste rock, in view of the problems of high quartz content and small amount of copper and sulfur in the waste rock, the quartz vein type copper-containing waste rock is crushed to a certain particle size and screened, and then the copper and sulfur ores in the coarse particle size, which account for the vast majority, are selected by an X-ray concentrator. The concentrate is copper ore, which can be sent to a concentrator for further concentrating, so as to achieve efficient recovery of valuable elements such as copper; the tailings are further crushed into fine sand, which can be sold as construction sand, and the fine particle size product with a small amount after screening is used for underground filling, thereby achieving efficient resource utilization of copper-containing waste rock, including the following specific steps and conditions:

[0018] (1) Copper-containing waste rock is subjected to coarse crushing and medium crushing, and the particle size of the final product of the medium crushing is controlled to be below 60-80 mm;

[0019] (2) The final product of the medium crushing is screened through a vibrating screen, the screen size is controlled to be 20-30 mm, and the products larger than 20-30 mm and the products smaller than 20-30 mm are screened out;

[0020] (3) The screened products with a diameter of more than 20 to 30 mm are fed into an X-ray concentrator for separation. The obtained concentrate is copper ore, which is sent to a concentrator for further separation to obtain copper concentrate. The tailings are sand and gravel with extremely low sulfur content. A small amount of products with a diameter of less than 20 to 30 mm can be used as underground filling materials.

[0021] (4) The tailings separated by the X-ray concentrator are further crushed and sanded, and the particle size is controlled at -5mm, and can be sold as construction sand.

[0022] The process of the present invention may further be:

[0023] The copper-containing waste rock contains 0.1-0.5% copper, 0.2-2.0% sulfur and 60-90% SiO2.

[0024] The yield of the sieved products with a size greater than 20 to 30 mm is 70 to 90%.

[0025] The concentrate separated by the X-ray concentrator contains 1-2% copper and 2-5% sulfur.

[0026] The tailings separated by the X-ray concentrator contain 0-0.1% sulfur and 0-0.1% copper.

[0027] The concentrate yield separated by the X-ray concentrator is 5-20%.

[0028] Example 1

[0029] The method of the present invention was used to study the resource utilization of copper-containing waste rock in a copper mine in Fujian. The element analysis of the copper-containing waste rock is shown in Table 1.

[0030] Table 1 Element analysis results of copper-containing waste rock in a copper mine in Fujian (%)

[0031]

[0032] From the data in Table 1, it can be seen that the main metal element that can be recovered is Cu. The process of the present invention is adopted. The specific process flow is shown in the attached Figure 1 :

[0033] (1) Copper-containing waste rock is subjected to coarse crushing and medium crushing, and the particle size of the final product of the medium crushing is controlled to be less than 60 mm;

[0034] (2) The final product of medium crushing is screened through a vibrating screen with a screen size of 20 mm to separate products larger than 20 mm and products smaller than 20 mm;

[0035] (3) The screened products with a diameter of more than 20 mm are fed into an X-ray concentrator for sorting. The concentrate obtained is copper ore, which can be sent to a concentrator for further beneficiation to obtain copper concentrate; the tailings are sand and gravel with extremely low sulfur content. A small amount of products with a diameter of less than 20 mm can be used as underground filling materials.

[0036] (4) The tailings separated by the X-ray concentrator are further crushed and sanded, and the particle size is controlled at -5mm, and can be sold as construction sand.

[0037] As attached Figure 1 As shown, the copper-containing waste rock is crushed and screened, and the +20 to -60mm particle size enters the X-ray concentrator. After sorting by the X-ray concentrator, the concentrate is copper ore, and the tailings are sand and gravel with extremely low sulfur content. After further crushing to -5mm, it can be used as construction sand. The -20mm particle size product can be used for underground filling.

[0038] The test results are shown in Table 2. From the test results in Table 2, it can be seen that after sorting by the X-ray concentrator, copper ore with a copper grade of 1.26% can be obtained, the copper recovery rate is 65.75%, the tailings contain 0.10% sulfur and 0.08% copper, and can be further crushed to -5mm and sold as construction sand.

[0039] Table 2 Experimental results of Example 1

[0040]

[0041]

[0042] Example 2

[0043] The method of the present invention was used to study the resource utilization of copper-containing waste rock in a copper mine in Jilin. The element analysis of the copper-containing waste rock is shown in Table 3.

[0044] Table 3 Element analysis results of copper-containing waste rock in a copper mine in Jilin (%)

[0045]

[0046] From the data in Table 1, it can be seen that the main metal element that can be recovered is Cu. The process of the present invention is adopted. The specific process flow is shown in the attached Figure 1 . Mainly:

[0047] (1) Copper-containing waste rock is subjected to coarse crushing and medium crushing, and the particle size of the final product of the medium crushing is controlled to be less than 70 mm;

[0048] (2) The final product of medium crushing is screened through a vibrating screen with a screen size of 30 mm to screen out products larger than 30 mm and products smaller than 30 mm;

[0049] (3) The screened products with a diameter of more than 30 mm are fed into an X-ray concentrator for sorting. The concentrate obtained is copper ore, which can be sent to a concentrator for further beneficiation to obtain copper concentrate; the tailings are sand and gravel with extremely low sulfur content. A small amount of products with a diameter of less than 30 mm can be used as underground filling materials.

[0050] (4) The tailings separated by the X-ray concentrator are further crushed and sanded, and the particle size is controlled at -5mm, and can be sold as construction sand.

[0051] As attached Figure 1 As shown, the copper-containing waste rock is crushed and screened, and the +30 to -70 mm particle size enters the X-ray concentrator. After sorting by the X-ray concentrator, the concentrate is copper ore, and the tailings are sand and gravel with extremely low sulfur content. After further crushing to -5 mm, it can be used as construction sand. The -30 mm particle size product can be used for underground filling.

[0052] The test results are shown in Table 4. From the test results in Table 4, it can be seen that after sorting by the X-ray concentrator, copper ore with a copper grade of 1.12% can be obtained, the copper recovery rate is 58.03%, the tailings contain 0.08% sulfur and 0.07% copper, and further crushing to -5mm can be sold as first-grade sand for construction.

[0053] Table 4 Experimental results of Example 2

[0054]

[0055] As described above, the present invention can be better implemented. The above embodiments are only the best implementation methods of the present invention, but the implementation methods of the present invention are not limited by the above embodiments. Other changes, modifications, replacements, combinations, and simplifications made without departing from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A method for resource utilization of quartz vein type copper-containing waste rock, which is characterized by: After the quartz vein type copper-bearing waste rock is crushed to a certain particle size and screened, the copper- and sulfur-bearing ores in the coarse-grained grade, which account for the vast majority, are selected by an X-ray concentrator. The concentrate is the copper ore, which can be sent to the concentrator for further concentrating, so as to achieve efficient recovery of valuable elements such as copper; the tailings are further crushed into fine sand, which can be sold as construction sand, and the fine-grained products with a small amount after screening are used for underground filling, thereby achieving efficient resource utilization of the copper-bearing waste rock, including the following specific steps and conditions: (1) Copper-containing waste rock is subjected to coarse crushing and medium crushing, and the particle size of the final product of the medium crushing is controlled to be below 60-80 mm; (2) The final product of the medium crushing is screened through a vibrating screen, the screen size is controlled to be 20-30 mm, and the products larger than 20-30 mm and the products smaller than 20-30 mm are screened out; (3) The screened products with a diameter of more than 20 to 30 mm are fed into an X-ray concentrator for separation. The obtained concentrate is copper ore, which is sent to a concentrator for further separation to obtain copper concentrate. The tailings are sand and gravel with extremely low sulfur content. A small amount of products with a diameter of less than 20 to 30 mm can be used as underground filling materials. (4) The tailings separated by the X-ray concentrator are further crushed and sanded, and the particle size is controlled at -5mm, and can be sold as construction sand.

2. The method according to claim 1, characterized in that The copper-containing waste rock contains 0.1-0.5% copper, 0.2-2.0% sulfur and 60-90% SiO2.

3. The method according to claim 1 or 2, characterized in that The yield of the sieved products with a size greater than 20 to 30 mm is 70 to 90%.

4. The method according to claim 1, characterized in that The concentrate separated by the X-ray concentrator contains 1-2% copper and 2-5% sulfur.

5. The method according to claim 1 or 4, characterized in that The tailings separated by the X-ray concentrator contain 0-0.1% sulfur and 0-0.1% copper.

6. The method according to claim 1, characterized in that The concentrate yield separated by the X-ray concentrator is 5-20%.

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