CN109550588B - Mineral processing technology for improving mineral processing, grinding and grading efficiency and grading index of ore - Google Patents
Mineral processing technology for improving mineral processing, grinding and grading efficiency and grading index of ore Download PDFInfo
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- CN109550588B CN109550588B CN201811256500.6A CN201811256500A CN109550588B CN 109550588 B CN109550588 B CN 109550588B CN 201811256500 A CN201811256500 A CN 201811256500A CN 109550588 B CN109550588 B CN 109550588B
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Abstract
The invention provides a mineral processing technology for improving the mineral processing, grinding and grading efficiency and grading index of ore, which comprises the steps of grading the ore; grading the classified bottom flow settled sand, enabling a section of settled sand graded overflow after the settled sand graded and the graded overflow after the graded to enter a grading system together, and returning the settled sand graded and the settled sand to the ore grinding system for closed circuit ore grinding circulation; grading overflow in a grading system to generate concentrate and tailings or tailings; through grading the ore, separating the settled sand and then grading, the grading efficiency is improved, the qualified fraction content in the settled sand is reduced, the mineral processing capacity is improved, the argillization rate of the ore (particularly important for lead-zinc-tin-antimony ore which is easy to argillize) is reduced, the ore sorting recovery rate is improved, and the economic benefit of a concentrating mill is improved.
Description
The technical field is as follows:
the invention relates to a mineral processing technology for improving the mineral processing, grinding and grading efficiency and the grading index of ores, belonging to the technical field of metallurgy and mineral engineering.
Background art:
at present, when the ore dressing, grinding and grading process is used for grading, when the grinding fineness is 50-70% of-200 meshes, the grading mass efficiency is generally 50-60%; when the grinding fineness is 90-95% of-200 meshes, the grading mass efficiency is 40-50%; when the grinding fineness is 90-95% of-400 meshes, the quality grading efficiency is 30-40%. Therefore, when the conventional ore grinding and grading process flow is used for grading, the grading quality efficiency is generally lower, and the grading quality efficiency is gradually reduced along with the increase of the grinding fineness. The low grading efficiency has the defects that part of qualified grain grades are circulated in the grinding grading loop, and the circulating load is increased, so that the grinding treatment capacity is relatively reduced. Meanwhile, when the qualified fraction passes through ore grinding again, the qualified fraction is ground again to be argillized, which affects the selection index, thereby causing metal loss and reducing the metal recovery rate.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provide a method for preventing the over-grinding of qualified grain size, improving the classification efficiency, reducing the cyclic load and improving the ore grinding treatment capacity; the mineral processing technology reduces overgrinding and reduces argillization phenomena and improves the mineral processing and grinding grading efficiency and the sorting index of the ore.
The object of the invention can be achieved by the following measures: a mineral processing technology for improving the grading efficiency and the grading index of mineral processing and grinding is characterized by comprising the following steps:
(1) grading the ore;
(2) grading the classified bottom flow settled sand, enabling a section of settled sand graded overflow after the settled sand graded and the graded overflow after the graded to enter a grading system together, and returning the settled sand graded and the settled sand to the ore grinding system for closed circuit ore grinding circulation;
(3) the graded overflow into the grading system produces concentrate and tailings or tailings.
In order to further achieve the object of the present invention, the classification is a two-stage classification, which comprises the following steps:
(1) performing primary grading on the ore;
(2) the first-stage bottom flow settled sand after the first-stage classification is further classified, namely enters the first-stage settled sand reclassification, the first-stage settled sand reclassification overflow after the first-stage settled sand reclassification and the first-stage classification overflow after the first-stage classification are subjected to the second-stage classification together, and the first-stage settled sand reclassified settled sand after the first-stage settled sand reclassification returns to a first-stage ore grinding system for closed circuit ore grinding circulation;
(3) the second-stage underflow settled sand after the second-stage classification is further classified, namely enters the second-stage settled sand reclassification, the second-stage settled sand reclassified overflow of the second-stage settled sand and the second-stage graded overflow of the second-stage classification enter a grading system together, and the second-stage settled sand reclassified of the second-stage settled sand enters second-stage ore grinding and returns to the second-stage classification for closed circuit ore grinding circulation;
(4) and the two-stage grading overflow entering the grading system generates concentrate and tailings or tailings.
In order to further realize the purpose of the invention, the ore in the step (1) is raw ore, the raw ore enters a crushing and screening system before primary classification, the raw ore enters a primary ore grinding system after crushing and screening, and a product after primary ore grinding is subjected to primary classification.
In order to further achieve the object of the present invention, the ore in the step (1) is gold concentrate.
In order to further realize the aim of the invention, the sorting system is a cyanidation system, the graded overflow entering the cyanidation system is cyanided to generate pregnant solution and cyanide slag, the pregnant solution is replaced to generate gold, and the barren solution returns to the cyanidation system.
In order to further realize the aim of the invention, the sorting system is a flotation system and a gravity separation system, the graded overflow firstly enters the flotation system, flotation concentrate and flotation tailings or tailings are generated after flotation, and gravity concentrate and gravity tailings or tailings are generated after the flotation tailings or tailings enter the gravity separation system and gravity separation.
In order to further realize the aim of the invention, the grading system is a reselection system, and graded overflow entering the reselection system is reselected to generate reselected concentrate and reselected tailings or tailings.
In order to further achieve the object of the invention, the grading system is a flotation system, and the graded overflow entering the flotation system produces concentrate and tailings or tailings.
Compared with the prior art, the invention can produce the following positive effects:
1. grading settled sand and then grading the ore grinding and grading system, further separating qualified grade in the settled sand, improving the grading efficiency and reducing the content of the qualified grade in the settled sand;
2. the ore grinding treatment capacity is improved;
3. the amount of the qualified grain fraction entering the grinding is reduced, so that the overgrinding and the argillization phenomena are reduced, the argillization rate of the ore is reduced, and the method is particularly more important for the ore which is easy to argillize;
4. the ore dressing recovery rate is improved;
5. the energy consumption of the concentrating mill is reduced.
6. Compared with the traditional process scheme, the method has the advantage of low early investment required for achieving the same effect.
Description of the drawings:
FIG. 1 is a process flow diagram of a first embodiment of the present invention;
FIG. 2 is a process flow diagram of a second embodiment of the present invention;
FIG. 3 is a process flow diagram of a third embodiment of the present invention;
FIG. 4 is a process flow diagram of a fourth embodiment of the present invention;
FIG. 5 is a process flow diagram of a fifth embodiment of the present invention;
FIG. 6 is a process flow diagram of a sixth embodiment of the present invention.
The specific implementation mode is as follows: the following detailed description of embodiments of the invention refers to the accompanying drawings in which:
example 1: a mineral processing technology (see figure 1) for improving the grading efficiency and the grading index of mineral processing and grinding comprises the following steps:
(1) raw ore enters a traditional crushing and screening system, is crushed and screened and then enters a primary ore grinding system, and products obtained after primary ore grinding are subjected to primary grading;
(2) the first-stage bottom flow settled sand after the first-stage classification is further classified, namely enters the first-stage settled sand reclassification, the first-stage settled sand reclassification overflow after the first-stage settled sand reclassification and the first-stage classification overflow after the first-stage classification are subjected to the second-stage classification together, and the first-stage settled sand reclassified settled sand after the first-stage settled sand reclassification returns to a first-stage ore grinding system for closed circuit ore grinding circulation;
(3) the second-stage underflow settled sand after the second-stage classification is further classified, namely enters the second-stage settled sand reclassification, the second-stage settled sand reclassified overflow of the second-stage settled sand and the second-stage graded overflow of the second-stage classification enter a grading system together, and the second-stage settled sand reclassified of the second-stage settled sand enters second-stage ore grinding and returns to the second-stage classification for closed circuit ore grinding circulation;
(4) the second stage graded overflow entering the grading system is processed by the traditional grading process to produce flotation or gravity concentrate and tailings or tailings.
Example 2: a mineral processing technology (see figure 2) for improving the grading efficiency and the grading index of mineral processing and grinding comprises the following steps:
(1) raw ore enters a traditional crushing and screening system, is crushed and screened and then enters a primary ore grinding system, and products obtained after primary ore grinding are subjected to primary grading;
(2) the first-stage bottom flow settled sand after the first-stage classification is further classified, namely enters the first-stage settled sand reclassification, a first-stage settled sand reclassification overflow after the first-stage settled sand reclassification and a first-stage classification overflow after the first-stage classification enter a sorting system together, and a first-stage settled sand reclassified after the first-stage settled sand reclassification returns to a first-stage ore grinding system for closed circuit ore grinding circulation;
(3) the first stage of graded overflow entering the grading system is treated by the traditional grading process to produce flotation or gravity concentrate and tailings.
Example 3: a mineral processing technology (see figure 3) for improving the grading efficiency and the grading index of mineral processing and grinding comprises the following steps:
(1) carrying out first-stage grading on the gold concentrate;
(2) the first-stage bottom flow settled sand after the first-stage classification is further classified, namely enters the first-stage settled sand reclassification, the first-stage settled sand reclassification overflow after the first-stage settled sand reclassification and the first-stage classification overflow after the first-stage classification are subjected to the second-stage classification together, and the first-stage settled sand reclassified settled sand after the first-stage settled sand reclassification enters the first-stage ore grinding and returns to the first-stage classification for closed circuit ore grinding circulation;
(3) the second-stage underflow settled sand after the second-stage classification is further classified, namely enters the second-stage settled sand reclassification, the second-stage settled sand reclassified overflow of the second-stage settled sand reclassified enters a cyanidation system together with the second-stage graded overflow of the second-stage classification, and the second-stage settled sand reclassified settled sand enters second-stage ore grinding and returns to the second-stage classification for closed circuit ore grinding circulation;
(4) the second-stage graded overflow flow entering the cyanidation system is cyanided to produce pregnant solution and cyanogen slag, the pregnant solution is replaced to produce gold, and the barren solution is returned to the cyanidation system.
Through efficient transformation, the comprehensive treatment capacity of a cyanidation plant is improved by 30% under the condition of not increasing ore grinding burden.
Example 4: a mineral processing technology (see figure 4) for improving the grading efficiency and grading index of mineral processing and grinding comprises the following steps:
(1) raw ore enters a traditional crushing and screening system, is crushed and screened and then enters a primary ore grinding system, and products obtained after primary ore grinding are subjected to primary grading;
(2) the first-stage bottom flow settled sand after the first-stage classification is further classified, namely enters the first-stage settled sand reclassification, the first-stage settled sand reclassification overflow after the first-stage settled sand reclassification and the first-stage classification overflow after the first-stage classification are subjected to the second-stage classification together, and the first-stage settled sand reclassified settled sand after the first-stage settled sand reclassification returns to a first-stage ore grinding system for closed circuit ore grinding circulation;
(3) the second-stage underflow settled sand after the second-stage classification is further classified, namely enters the second-stage settled sand reclassification, the second-stage settled sand reclassified overflow of the second-stage settled sand reclassified enters a flotation system together with the second-stage graded overflow of the second-stage classification, and the second-stage settled sand reclassified settled sand enters second-stage ore grinding and returns to the second-stage classification for closed circuit ore grinding circulation;
(4) the second-stage graded overflow flow entering the flotation system is subjected to flotation to generate flotation concentrate and flotation tailings or tailings, and the flotation tailings or tailings enter the gravity concentration system and are subjected to gravity concentration to generate gravity concentrate and gravity tailings or tailings.
Example 5: a mineral processing technology (see figure 5) for improving the grading efficiency and the grading index of mineral processing and grinding comprises the following steps:
(1) raw ore enters a traditional crushing and screening system, is crushed and screened and then enters a primary ore grinding system, and products obtained after primary ore grinding are subjected to primary grading;
(2) the first-stage bottom flow settled sand after the first-stage classification is further classified, namely enters the first-stage settled sand reclassification, the first-stage settled sand reclassification overflow after the first-stage settled sand reclassification and the first-stage classification overflow after the first-stage classification are subjected to the second-stage classification together, and the first-stage settled sand reclassified settled sand after the first-stage settled sand reclassification returns to a first-stage ore grinding system for closed circuit ore grinding circulation;
(3) the second-stage underflow settled sand after the second-stage classification is further classified, namely enters the second-stage settled sand reclassification, the second-stage settled sand reclassified overflow of the second-stage settled sand and the second-stage graded overflow of the second-stage classification enter a gravity separation system together, and the second-stage settled sand reclassified settled sand enters the second-stage ore grinding and returns to the second-stage classification for closed circuit ore grinding circulation;
(4) and the secondary graded overflow entering the reselection system is reselected to generate reselected concentrate and reselected tailings or tailings.
Example 6: a mineral processing technology (see figure 6) for improving the grading efficiency and grading index of mineral processing and grinding comprises the following steps:
(1) raw ore enters a traditional crushing and screening system, is crushed and screened and then enters a primary ore grinding system, and products obtained after primary ore grinding are subjected to primary grading;
(2) the first-stage bottom flow settled sand after the first-stage classification is further classified, namely enters the first-stage settled sand reclassification, the first-stage settled sand reclassification overflow after the first-stage settled sand reclassification and the first-stage classification overflow after the first-stage classification are subjected to the second-stage classification together, and the first-stage settled sand reclassified settled sand after the first-stage settled sand reclassification returns to a first-stage ore grinding system for closed circuit ore grinding circulation;
(3) the second-stage underflow settled sand after the second-stage classification is further classified, namely enters the second-stage settled sand reclassification, the second-stage settled sand reclassified overflow of the second-stage settled sand reclassified enters a flotation system together with the second-stage graded overflow of the second-stage classification, and the second-stage settled sand reclassified settled sand enters second-stage ore grinding and returns to the second-stage classification for closed circuit ore grinding circulation;
(4) the second stage grading overflow flow entering the flotation system is floated to generate flotation concentrate and flotation tailings or tailings.
It should be understood that parts of the specification not set forth in detail are well within the prior art. The above examples are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (7)
1. A mineral processing technology for improving the grading efficiency and the grading index of mineral processing and grinding is characterized by comprising the following steps:
(1) performing primary grading on the ore;
(2) the first-stage bottom flow settled sand after the first-stage classification is further classified, namely enters the first-stage settled sand reclassification, the first-stage settled sand reclassification overflow after the first-stage settled sand reclassification and the first-stage classification overflow after the first-stage classification are subjected to the second-stage classification together, and the first-stage settled sand reclassified settled sand after the first-stage settled sand reclassification returns to a first-stage ore grinding system for closed circuit ore grinding circulation;
(3) the second-stage underflow settled sand after the second-stage classification is further classified, namely enters the second-stage settled sand reclassification, the second-stage settled sand reclassified overflow of the second-stage settled sand and the second-stage graded overflow of the second-stage classification enter a grading system together, and the second-stage settled sand reclassified of the second-stage settled sand enters second-stage ore grinding and returns to the second-stage classification for closed circuit ore grinding circulation;
(4) and the two-stage grading overflow entering the grading system generates concentrate and tailings or tailings.
2. A mineral processing technology for improving the grading efficiency and grading index of mineral processing and grinding according to claim 1, characterized in that the mineral in the step (1) is raw mineral, the raw mineral enters a crushing and screening system before primary grading, the raw mineral enters a primary grinding system after crushing and screening, and a product after primary grinding is subjected to primary grading.
3. The mineral processing technology for improving the grading efficiency and grading index of mineral processing and grinding according to claim 1, characterized in that the mineral in the step (1) is gold concentrate.
4. A mineral processing process for improving the grading efficiency and grading index of ore dressing and grinding according to claim 1, characterized in that the grading system is a cyanidation system, the graded overflow entering the cyanidation system is cyanided to produce pregnant solution and cyanogen slag, the pregnant solution is displaced to produce gold, and the barren solution is returned to the cyanidation system.
5. A mineral processing technology for improving the classification efficiency and index of ore dressing and grinding according to claim 1, characterized in that the classification system is a flotation system and a gravity separation system, the classification overflow enters the flotation system first, flotation concentrate and flotation tailings or tailings are generated after flotation, and the flotation tailings or tailings enter the gravity separation system and gravity separation is performed to generate gravity concentrate and gravity tailings or tailings.
6. A mineral processing technology for improving the grading efficiency and grading index of mineral processing and grinding according to claim 1, characterized in that the grading system is a gravity concentration system, and the graded overflow entering the gravity concentration system is gravity-concentrated to produce gravity concentrate and gravity tailings or tailings.
7. A mineral processing process according to claim 1 for improving the classification efficiency and index of mineral processing and grinding, characterized in that the classification system is a flotation system, and the classification overflow into the flotation system produces concentrate and tailings or tailings.
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Citations (4)
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| US4584096A (en) * | 1982-02-11 | 1986-04-22 | J. Warren Allen | Process to beneficiate phosphate and sand products from debris and phosphate tailing ores |
| CN101708482A (en) * | 2008-12-03 | 2010-05-19 | 鞍钢集团矿业公司 | New technology for processing iron tailings |
| CN103182344A (en) * | 2011-12-30 | 2013-07-03 | 北京有色金属研究总院 | Ore dressing combination process for processing high-slime lead-zinc oxide and sulfide mixed ore |
| CN103433122A (en) * | 2013-09-12 | 2013-12-11 | 广西华锡集团股份有限公司车河选矿厂 | Quality-separating, grading and sorting process for tin middlings |
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2018
- 2018-10-26 CN CN201811256500.6A patent/CN109550588B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4584096A (en) * | 1982-02-11 | 1986-04-22 | J. Warren Allen | Process to beneficiate phosphate and sand products from debris and phosphate tailing ores |
| CN101708482A (en) * | 2008-12-03 | 2010-05-19 | 鞍钢集团矿业公司 | New technology for processing iron tailings |
| CN103182344A (en) * | 2011-12-30 | 2013-07-03 | 北京有色金属研究总院 | Ore dressing combination process for processing high-slime lead-zinc oxide and sulfide mixed ore |
| CN103433122A (en) * | 2013-09-12 | 2013-12-11 | 广西华锡集团股份有限公司车河选矿厂 | Quality-separating, grading and sorting process for tin middlings |
Non-Patent Citations (1)
| Title |
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| 磨矿回路中两次分级新工艺——提高分级效率的有效途径（摘要）;张宏福;《国外金属矿选矿》;19860831;第15-16、26页 * |
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Address after: No. 118, Taishan Road, Yantai Development Zone, Shandong Province Patentee after: Shanjin Design Consulting Co.,Ltd. Address before: No. 118, Taishan Road, Yantai Development Zone, Shandong Province Patentee before: SHANDONG GOLD GROUP YANTAI DESIGN & RESEARCH ENGINEERING Co.,Ltd. |