CN-121669415-B - Screening process for useful minerals in waste rocks

Abstract

The invention belongs to the technical field of ore dressing, and particularly relates to a screening process of useful minerals in waste rocks, which comprises the following steps of S1, screening raw ores by an intelligent ore dressing machine to obtain qualified ores and first waste rocks, S2, screening the first waste rocks to obtain second waste rocks and tailings, S3, treating the second waste rocks by a movable sieve jigger to obtain first concentrate and second concentrate, wherein a diaphragm of the movable sieve jigger adopts 10.00R20 steel wire tires.

Inventors

• XIAO YUPENG
• Luo Mulin
• HUANG XUEXING
• HUANG YONGJIN
• ZHOU LIN
• HUANG YUANLI
• YANG YUANLI
• Zhong Qingwan
• QIU JIGUANG

Assignees

• 崇义章源钨业股份有限公司

Dates

Publication Date

20260505

Application Date

20260206

Claims (6)

1. 1. A process for screening useful minerals in waste rock, comprising the steps of: S1, screening raw ores by adopting an intelligent concentrating machine to obtain qualified ores and first waste stones, wherein the granularity of the first waste stones is less than or equal to 45mm, the tungsten grade of the raw ores is 0.34% -0.37%, and the copper grade is 0.09% -0.12%; s2, screening the first waste rock to obtain second waste rock and tailings, wherein the granularity of the second waste rock is less than or equal to 22mm, and the granularity of the tailings is greater than 22mm; S3, treating the second waste stone by adopting a movable sieve jig to obtain first concentrate and second concentrate, wherein a diaphragm of the movable sieve jig adopts 10.00R20 steel wire tires, the stroke of the movable sieve jig is 28-30 mm, the stroke frequency is 28-36 times/min, the water pressure of the added water is 0.5-0.8 MPa, the granularity of the second concentrate is less than 6mm, and the granularity of the first concentrate is 6-22 mm; in the step S1, the tungsten grade of the first waste rock is 0.005% -0.006%, and the copper grade is 0.005% -0.006%; In the step S2, the tungsten grade of the second waste rock is 0.0075% -0.0082%, the copper grade is 0.0058% -0.0065%, the bulk density is 1.5-1.6 g/cm 3 , and the proportion of the minerals with the granularity of 0.5-6 mm in the minerals with the granularity of less than or equal to 6mm in the second waste rock is more than or equal to 60wt%.
2. 2. The process according to claim 1, wherein step S2 is specifically performed by screening the first waste rock with a single-layer vibrating screen to obtain the second waste rock.
3. 3. The process according to claim 1, wherein in the step S2, the second waste rock has a specific surface area of tungsten ore of 1.2m 2 /g or less and a specific surface area of chalcopyrite of 1.0m 2 /g or less.
4. 4. The process according to claim 1, wherein the step S1 further comprises the step of re-selecting the qualified ore, and the step S3 further comprises the step of re-selecting the second concentrate.
5. 5. The process according to claim 1, wherein the recovery rate of tungsten in the first concentrate is 80% or more and the recovery rate of copper is 50% or more.
6. 6. The process for screening useful minerals from waste rock according to claim 5, wherein the first concentrate has a tungsten grade of 17% -23% and a copper grade of 10% -12.2%.

Description

Screening process for useful minerals in waste rocks Technical Field The invention belongs to the technical field of mineral separation, and particularly relates to a screening process of useful minerals in waste rocks. Background In the process of processing raw ores to obtain tungsten ores and waste rocks, the conventional intelligent ore dressing machine cannot effectively identify and process fine minerals within a certain fine particle size range. Taking an X-ray ore dressing machine used in the existing factory as an example, the equipment cannot realize hundred percent recovery of valuable metal minerals, and a small amount of valuable metal minerals, such as scheelite, chalcopyrite and the like, still remain in waste rock, particularly waste rock minerals with fine particle size, which are easy to be mixed into gangue minerals, are thrown away, so that the loss of the valuable minerals is caused. Therefore, a scheme capable of recovering medium-sized minerals in the waste rocks treated by the intelligent concentrator is needed to recover metals such as tungsten and copper in the medium-sized minerals (granularity is 6-22 mm) in the waste rocks, so that mineral loss is prevented. Disclosure of Invention In order to solve the technical problems, the invention provides a screening process of useful minerals in waste rocks, which comprises the following steps: S1, screening raw ores by adopting an intelligent concentrating machine to obtain qualified ores and first waste stones, wherein the granularity of the first waste stones is less than or equal to 45mm, the tungsten grade of the raw ores is 0.34% -0.37%, and the copper grade is 0.09% -0.12%; s2, screening the first waste rock to obtain second waste rock and tailings, wherein the granularity of the second waste rock is less than or equal to 22mm, and the granularity of the tailings is greater than 22mm; S3, treating the second waste stone by adopting a movable sieve jig to obtain first concentrate and second concentrate, wherein a diaphragm of the movable sieve jig adopts 10.00R20 steel wire tires, the stroke of the movable sieve jig is 28-30 mm, the stroke frequency is 28-36 times/min, the water pressure of the added water is 0.5-0.8 MPa, the granularity of the second concentrate is less than 6mm, and the granularity of the first concentrate is 6-22 mm. In the step S1, the grade of tungsten in the first waste rock is 0.005% -0.006%, and the grade of copper is 0.005% -0.006%. The step S2 is specifically that a single-layer vibrating screen is adopted to screen the first waste rock to obtain the second waste rock. In the step S2, the tungsten grade of the second waste rock is 0.0075% -0.0082%, the copper grade is 0.0058% -0.0065%, the bulk density is 1.5-1.6 g/cm 3, and the proportion of the minerals with the granularity of 0.5-6 mm in the minerals with the granularity of less than or equal to 6mm in the second waste rock is more than or equal to 60wt%. In the step S2, in the second waste rock, the specific surface area of tungsten ore is less than or equal to 1.2m 2/g, and the specific surface area of chalcopyrite is less than or equal to 1.0m 2/g. The step S1 further comprises the step of reselecting the qualified ore, and the step S3 further comprises the step of reselecting the second concentrate. And the recovery rate of tungsten in the first concentrate is more than or equal to 80%, and the recovery rate of copper is more than or equal to 50%. The tungsten grade of the first concentrate is 17% -23%, and the copper grade of the first concentrate is 10% -12.2%. According to the invention, the material of the diaphragm of the jigger is replaced, and the parameters of the movable sieve jigger are correspondingly adjusted, so that the intelligent ore dressing machine can recover medium-grain minerals in waste stones generated by screening tungsten ores, thereby reducing metal loss and improving the recovery rate and resource utilization rate of useful minerals. Drawings In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art. FIG. 1 is a schematic illustration of the process flow of the present invention. The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments. Detailed Description The following description will be made clearly and fully with reference to the technical solutions in the embodiments, and it is apparent that the described embodiments are only some embodiments of t