CN102974440A - High-pressure rolling superfine crushing method of tungsten ore - Google Patents
High-pressure rolling superfine crushing method of tungsten ore Download PDFInfo
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- CN102974440A CN102974440A CN2012105168283A CN201210516828A CN102974440A CN 102974440 A CN102974440 A CN 102974440A CN 2012105168283 A CN2012105168283 A CN 2012105168283A CN 201210516828 A CN201210516828 A CN 201210516828A CN 102974440 A CN102974440 A CN 102974440A
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Abstract
The invention discloses a high-pressure rolling superfine crushing method of tungsten ore, and the high-pressure rolling superfine crushing method is characterized by comprising the following steps of: adjusting ore crushing process parameters of the existing process; feeding a crushing machine product with the size of 30-50 mm into a high-pressure rolling machine to carry out superfine crushing; and feeding a product which is rolled at high pressure to a ball grinding mill and a spiral grading machine. The high-pressure rolling superfine crushing method further comprises the following steps of: 1, adjusting the ore crushing process parameters of the existing process and thickening a final ore crushing granularity to 30-50 mm; meanwhile, adjusting the crushing ratio of rough crushing and intermediate crushing according to the performance characteristics of a crushing machine; 2, feeding the crushing machine product with the size of 30-50 mm to the high-pressure rolling machine to carry out the superfine crushing, wherein a superfine crushing manner can be full-closed-loop high-pressure rolling, edge material circulating or open-loop high-pressure rolling; and 3, feeding the product which is rolled at the high pressure into the ball grinding mill and the spiral grading machine. Compared with the prior art, the high-pressure rolling superfine crushing method of the tungsten ore has the advantages of improving the processing capability of an ore crushing system, improving the grindability of the product which is rolled at the high pressure by more than 30%, and reducing the consumption of a steel ball and a liner plate of subsequent ball milling work.
Description
Technical field
The invention belongs to the technique of preparing field, relate in particular to a kind of high pressure roller mill ultrafine grinding method of tungsten ore.Can be applied to Hengyang, Hunan Province distant view tungsten ore, hole, row Lip river, Sanming, Fujian Province Ninghua tungsten ore, Hunan persimmon bamboo plantation tungsten ore, Xiushui County, jiangxi Province incense burner mountain scheelite, Xiaoliugou Gansu scheelite etc.
Background technology
World's tungsten ore reserves according to US Geological Survey's announcement in 2009, China is the country of tungsten ore reserves maximum, account for 66% of world saving, and the data that the 72.1%(that scheelite accounts for gross reserves announces according to 2002 " Mineral Resources in China annual report ", by 2000 the end of the year China's scheelite reserves be 3698.4kt).The at present principle technological process of China's scheelite or black and white tungsten ore is raw ore through behind two sections or the Three stage crushing with single closed circuit stage, all enters ball milling or rod mill.As hole, Hunan persimmon bamboo plantation tungsten ore, the Xiamen tungsten industry company capable Lip river of Ninghua County, Fujian Province tungsten ore, Hengyang, Hunan Province distant view tungsten ore raw ore through conventional Three stage crushing with single closed circuit stage after to-12mm, all enter ball (rod) grinding machine, carry out again flotation (or gravity treatment) and reclaim scheelite or wolframite; The mines such as xiushui incense burner mountain scheelite, Xiaoliugou Gansu scheelite also are through behind three section one closed circuit ore crushing technique in addition, all enter grinding of ball grinder to-200 orders about 70%.Since the ball milling energy consumption account for whole ore dressing plant total energy consumption about 60%, how broken few mill is the energy-saving and cost-reducing direction in metal mine ore dressing plant always.The conventional comminution technique that the white tungsten (containing black and white tungsten) in the whole nation generally adopts is to cause one of high major reason of energy consumption.
Because high-pressure roller mill has the characteristics such as production capacity is large, product granularity is thin, effective utility of laser power is high, floor space is little, can improve the ball mill disposal ability, and reduce energy consumption of mill and steel consumption, improve sorting index, be subject to the favor of various countries' ore dressing industry.Ore in the application of present domestic high pressure roller mill is mainly cementmine, iron ore, bauxite etc., but research and the Patents that the high-pressure roller mill machine is applied to tungsten ore had no report.
There are the problems such as mill feed size is thick, unit power consumption is high in the general employing of tungsten ore (particularly scheelite or black and white tungsten ore) ore dressing preparation work crushing process two sections or three section one closed circuit technique.The new technology of being badly in need of a kind of ultrafine grinding reduces the energy consumption of muck operation, improves grinding efficiency and the production capacity of ball milling.
Summary of the invention
Purpose of the present invention is exactly the problems referred to above that exist in the existing technique, a kind of high pressure roller mill ultrafine grinding method of tungsten ore is provided, can reduces the tungsten ore granularity that enters grinding system, the steel ball that improves tungsten ore grindability, reduction ball milling and liner plate consumption, raising production capacity.
The object of the present invention is achieved like this: a kind of high pressure roller mill ultrafine grinding method of tungsten ore, it is characterized in that: comprise the ore crushing technique parameter of adjusting existing technique, the disintegrating machine product of 30-50mm is fed high-pressure roller mill carry out ultrafine grinding, the product behind the high pressure roller mill feeds ball mill and spiral classifier.Also comprise according to the following steps and carrying out:
(1) adjust the ore crushing technique parameter of existing technique, final garrulous ore granularity is put thick to 30-50mm, simultaneously according to the performance characteristic of disintegrating machine, adjust coarse crushing with in the broken ratio of reduction, reach the purpose that improves the muck system throughput.
(2) the disintegrating machine product of 30-50mm is fed high-pressure roller mill and carry out ultrafine grinding, the mode of ultrafine grinding can be full cut-off road high pressure roller mill, rim charge circulation or open circuit high pressure roller mill.During full cut-off road high pressure roller mill, the screen size of the sieve supporting with it is selected 3-10mm, and the coarse granule product on the sieve returns the high-pressure roller mill system and carries out again high pressure roller mill.The roll gap pressure of high-pressure roller mill when work is 3-5Mpa, and the roller gap is 10-25mm, and roller speed is 0.8-2m/s.
(3) product behind the high pressure roller mill feeds ball mill and spiral classifier (comprise ball mill and hydrocyclone or sieve molecular closed-circuit system).
Compared with prior art, the advantage of the high pressure roller mill ultrafine grinding method of a kind of tungsten ore of the present invention is:
(1) the present invention utilizes the low high-pressure roller mill of power consumption as the ultrafine grinding of tungsten ore comminution process, relaxes the gape of operation in small, broken bits, adjusts the ratio of reduction of each section of muck system, has improved the disposal ability of muck system.
(2) tungsten ore is through behind the high pressure roller mill, and the grindability of product improves more than 30%, and the ball milling Bond work index of ore reduces 1.99kWh/s, and the mill of tungsten ore selects performance to obtain effective raising, reduces the consumption of subsequent ball milling operation steel ball and liner plate.
(3) tungsten ore is through behind the high pressure roller mill, in the product-3mm content increases more than 30 percentage points ,-5mm content increases more than 40 percentage points, F50/P50 when closed circuit high pressure roller mill product screen size is 5mm behind closed circuit the stablizing＞=18, the F50/P50 when screen size is 3mm behind closed circuit the stablizing＞=16.
(4) owing to the raising of grindability and the reduction of granularity behind the tungsten ore process high pressure roller mill, the one-hour capacity of ball milling improves more than 50%.
(5) if Hunan distant view tungsten ore is carried out the high pressure roller mill technological transformation, improve production capacity 50%, 60 yuan/t of unit raw ore investment, increment financial internal rate of return (FIRR) 33%.
Description of drawings:
Fig. 1: high pressure roller mill ultrafine grinding schematic flow sheet during closed circuit crushing.
Fig. 2: high pressure roller mill Granularity Distribution figure during open circuit crushing.
Fig. 3: high pressure roller mill Granularity Distribution figure when rim charge returns.
Fig. 4: high pressure roller mill Granularity Distribution figure during closed circuit crushing.
Fig. 5: Relative grindability curve map during closed circuit crushing.
The specific embodiment
Below by embodiment, the invention will be further described.
Example 1: with the broken sample of tungsten ore to-below the 30mm, feed in the high-pressure roller mill, adopt open circuit crushing, the roll gap pressure position 4.5Mpa of high pressure roller mill, roller speed is 26r/min, static roll gap is 12mm, the high pressure roller mill Granularity Distribution is seen Fig. 2.
Through behind the high pressure roller mill, product granularity forms and has produced larger variation ,-3mm increase respectively 37.65 percentage points ,-5mm increases respectively 42.72 percentage points.Ore grinding is to-200 orders 50%, and Relative grindability improves 42.4%.F50/P50=19.38 when screen size is 5mm behind closed circuit the stablizing, the F50/P50=17.55 when screen size is 3mm behind closed circuit the stablizing.
Material behind the ultrafine grinding is carried out roll-in, and to carry out the result that ball milling bond work index measures be 10.53kWh/t, and the operating rate of high pressure roller mill is 91.67%.
Example 2: with tungsten ore with the broken sample of tungsten ore to-below the 30mm, feed in the high-pressure roller mill, adopt rim charge to return, the roll gap pressure position 4.5Mpa of high pressure roller mill, roller speed is 26r/min, static roll gap is 12mm, the high pressure roller mill Granularity Distribution is seen Fig. 3.
After the process screen size was the closed circuit high pressure roller mill test of 5mm ,-3mm content increased by 37.83 percentage points;-5mm content increases by 45.34 percentage points, and ore grinding is to-200 orders 50%, and Relative grindability improves 43.2%.F50/P50=20.18 when screen size is 5mm behind closed circuit the stablizing, the F50/P50=18.02 when screen size is 3mm behind closed circuit the stablizing.
The operating rate of high pressure roller mill is 87.5%, and the material behind the ultrafine grinding is carried out roll-in, and to carry out the result that grinding work index (the closed circuit product of 5mm) measures be 9.68Wh/t.
Example 3: with tungsten ore with the broken sample of tungsten ore to-below the 30mm, feed in the high-pressure roller mill, adopt closed circuit crushing, the roll gap pressure position 4.5Mpa of high pressure roller mill, roller speed is 26r/min, static roll gap is 12mm, and the high pressure roller mill Granularity Distribution sees that Fig. 4, Relative grindability curve see that Fig. 5, high pressure roller mill ultrafine grinding flow process see Fig. 1.
After the process screen size was the closed circuit high pressure roller mill test of 5mm ,-3mm content increased by 36.09 percentage points;-5mm content increases by 46.49 percentage points.Ore grinding is to-200 orders 50%, and Relative grindability improves 44.2%.。The operating rate of high pressure roller mill is 87.5%, and the material behind the ultrafine grinding is carried out roll-in, and to carry out the result that grinding work index (the closed circuit product of 5mm) measures be 9.4kWh/t.
Claims (3)
1. the high pressure roller mill ultrafine grinding method of a tungsten ore, it is characterized in that: comprise the ore crushing technique parameter of adjusting existing technique, the disintegrating machine product of 30-50mm is fed high-pressure roller mill carry out ultrafine grinding, the product behind the high pressure roller mill feeds ball mill and spiral classifier; Also comprise according to the following steps and carrying out:
(1) adjust the ore crushing technique parameter of existing technique, final garrulous ore granularity is put thick to 30-50mm, simultaneously according to the performance characteristic of disintegrating machine, adjust coarse crushing with in the broken ratio of reduction, reach the purpose that improves the muck system throughput;
(2) the disintegrating machine product of 30-50mm is fed high-pressure roller mill and carry out ultrafine grinding, the mode of ultrafine grinding can be full cut-off road high pressure roller mill, rim charge circulation or open circuit high pressure roller mill;
(3) product behind the high pressure roller mill feeds ball mill and spiral classifier (comprise ball mill and hydrocyclone or sieve molecular closed-circuit system).
2. the high pressure roller mill ultrafine grinding method of the described a kind of tungsten ore of claim 1, it is characterized in that: during full cut-off road high pressure roller mill described in the step (2), the screen size of the sieve supporting with it is selected 3-10mm, and the coarse granule product on the sieve returns the high-pressure roller mill system and carries out again high pressure roller mill.
3. the high pressure roller mill ultrafine grinding method of the described a kind of tungsten ore of claim 1 is characterized in that: high-pressure roller mill described in the step (2), and the roll gap pressure when work is 3-5Mpa, and the roller gap is 10-25mm, and roller speed is 0.8-2m/s.
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Cited By (6)
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| CN103143428A (en) * | 2013-03-21 | 2013-06-12 | 张文墩 | Method and equipment for rapidly processing ceramic chemical industry ore standard granules |
| CN103894276A (en) * | 2014-03-03 | 2014-07-02 | 武平紫金矿业有限公司 | Grinding separation technology for silver-containing polymetallic ore |
| CN103934077A (en) * | 2014-04-04 | 2014-07-23 | 中国地质科学院郑州矿产综合利用研究所 | High-efficiency low-consumption ultrafine crushing-grinding process |
| CN105772197A (en) * | 2016-03-15 | 2016-07-20 | 东莞市五全机械有限公司 | Production process of ultrafine roller mill device |
| CN110449246A (en) * | 2019-08-09 | 2019-11-15 | 成都利君实业股份有限公司 | A kind of pair of mineral carry out selective milling, the method for sorting and implementation equipment |
| CN112827658A (en) * | 2021-01-04 | 2021-05-25 | 长沙矿冶研究院有限责任公司 | Scheelite beneficiation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143428A (en) * | 2013-03-21 | 2013-06-12 | 张文墩 | Method and equipment for rapidly processing ceramic chemical industry ore standard granules |
| CN103894276A (en) * | 2014-03-03 | 2014-07-02 | 武平紫金矿业有限公司 | Grinding separation technology for silver-containing polymetallic ore |
| CN103934077A (en) * | 2014-04-04 | 2014-07-23 | 中国地质科学院郑州矿产综合利用研究所 | High-efficiency low-consumption ultrafine crushing-grinding process |
| CN103934077B (en) * | 2014-04-04 | 2015-12-02 | 中国地质科学院郑州矿产综合利用研究所 | High-efficiency low-consumption ultrafine crushing-grinding process |
| CN105772197A (en) * | 2016-03-15 | 2016-07-20 | 东莞市五全机械有限公司 | Production process of ultrafine roller mill device |
| CN105772197B (en) * | 2016-03-15 | 2019-05-03 | 东莞市五全机械有限公司 | A kind of ultra tiny roller mill equipment production flow |
| CN110449246A (en) * | 2019-08-09 | 2019-11-15 | 成都利君实业股份有限公司 | A kind of pair of mineral carry out selective milling, the method for sorting and implementation equipment |
| CN112827658A (en) * | 2021-01-04 | 2021-05-25 | 长沙矿冶研究院有限责任公司 | Scheelite beneficiation method |
| CN112827658B (en) * | 2021-01-04 | 2023-04-07 | 长沙矿冶研究院有限责任公司 | Scheelite beneficiation method |
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Application publication date: 20130320 |