I. Location: Located in the northern part of Dongchuan City, Yunnan Province. Mine north Jinsha River, bordering South and snow.
Second, the ore characteristics: is a hydrothermal metasomatic type of deposit, occurring in argillaceous dolomite . The Zhangkoudong section is located at the bottom of the dolomite lentils in the slate of Montenegro.
Most of the ore bodies are lentils and lenses, and the thickness is 1 to 25 m, generally 3 to 8 m.
Dolomite ore containing copper silicide ore, chalcopyrite copper sulphide minerals, mainly bornite, chalcocite and views of copper blue; composed primarily copper oxide and malachite chrysocolla. The gangue is dominated by dolomite, followed by quartz and calcite . The ore structure is mainly dyed by fine particles, followed by ponytail, gelatinous, scatter-like, and film-like. In addition to pure in vitro, malachite has a "dye body". The ore is severely weathered, contains a large amount of mud, and has fine grain size and complex structure. It is combined with high content of copper oxide and is a difficult copper ore.
The hardness of ore and surrounding rock is f=7～12, the ore density is 2.77t/m 3 , the average geological grade of ore is 0.88%, and the ore grade is about 0.6%.
Third, the history of plant: because people beneficiation plant at the end of 1958 was basically completed and put into production (simple). The State Planning Commission initially set the scale to 4560 t/d, and then reduced the production scale to 3,300 t/d based on the semi-industrial test of the oxidized ore and the actual production data of the plant.
It was officially put into operation on May 1, 1960. Except for the design capability in 1966, the design capacity was not reached in the rest of the year.
4. Production Overview: The ore industrial reserves are 25.51 million tons, the copper grade is 0.87%, and the copper metal volume is 197,000 tons.
The three pits are mined and transported by the motor car to the top of the coarse mine silo, and are discharged into the coarse mining bin with a 2.0m 3 double-cart electric dumper. The three-stage open-cut crushing ore is adopted, and the grinding float is designed as a stage grinding centralized sorting process, and the I coarse concentrate and the II coarse concentrate are selected and selected separately, and the coarse concentrate concentrate focuses on improving the concentrate. Grade, II coarse concentrate focuses on increasing the recovery rate of oxidized ore. The product of the first two coarse grooves is directly used as the final concentrate.
Concentrate dewatering uses a three-stage process of concentration, filtration and drying. The copper concentrate is transported by car to Xincun Railway Station and transported by train to Kunming Yunnan Smelter.
Associated people because copper silver content of not more than 25g / t, 80% ~ 90 % recovered into the copper concentrate.
The plant is planned to replace the 7A flotation machine with a KYF-16 flotation machine, and replace the filter and drying processes with a filter press.
V. Process flow: See the figure below.
Tuin civil concentrator process
Production indicators: See Table 1.
Table 1 Main production indicators
project | unit | design | Best level of history | 1965 | 1970 | 1975 | in 1980 | 1985 | 1986 | year 1987 |
Processing of ore | t/d | 3300 | 2973 | 2204 | 2582 | 1642 | 2026 | 1832 | ||
10,000 tons / y | 108.9 | 102.254 | 76.7068 | 85.7136 | 54.8551 | 65.6518 | 56.1743 | |||
Raw ore taste Concentrate grade Concentrate content Recovery rate | Cu% Cu% 10,000 tons / y % | 0.72 20 75 | 0.83 27.77 0.5174 88.11 | 0.63 16.59 0.3648 75.90 | 0.60 17.36 0.3943 77.61 | 0.83 19.65 0.4001 88.11 | 0.65 22.60 0.3658 85.95 | 0.75 27.77 0.3672 87.27 |
7. Consumption indicators: See Table 2.
Table 2 Material consumption, cost, labor productivity
project | unit | design | Best level of history | 1965 | 1970 | 1975 | in 1980 | 1985 |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
Yellow medicine 2# oil Sodium sulfide Steel ball Power consumption (full plant) Cost (whole plant) Full labor productivity Production worker productivity | g/t g/t g/t Kg/t °/t Yuan/t raw ore t/人·月 t/人·月 | 300 53 1100 26.3 7.96 291 | 94 45 249 0.767 27.87 4.96 217 | 296 51 681 1.13 30.30 6.84 141 | 239 60 1033 1.09 33.60 5.97 217 | 164 57 718 1.034 33.7 6.12 102 | 138 55 439 0.937 33.5 6.26 172 216 | 102 45 312 1.242 30.31 6.40 164 210 |
1986 | year 1987 | |||||||
10 | 11 | |||||||
Eight, the main equipment capabilities: see Table 3.
Table 3 Equipment capabilities
project | Name and specification | Number of units | Maximum throughput | |||
First, broken mine | t/å°Â·h | Product granularity Mm | Width of the vent Mm | Ore loose density t/m 3 | ||
Coarse Broken Finely broken | KKД-700 cycle KCД-1650 standard cone KCД-1650 short head cone KCД-short cone | 1 1 1 1 | 300 220～375 100～290 | -160 -55 -20 | 130 30 5~8 | 1.6 1.6 1.6 |
Second, grinding classification | t/å°Â·h | Feeding granularity Mm | Grinding fineness %-200 mesh | |||
One section Second paragraph | 33200×3100 lattice type Ibid. | 2 2 | 73 | -20 -5 | 45 86 | |
Third, flotation | m 3 /t·d | Working concentration % | Fineness of each mine %-200 mesh | |||
(rough, fine, sweep) 7A flotation machine | 100 | 0.125 | 35±2 | 86 | ||
Fourth, dehydration | t/m 2 ·d | Feed concentration% | Mine concentration% Filter cake moisture% | Concentrate density, t/m 3 | ||
concentrate filter dry | 2424m peripheral drive concentrator ДY-68-25/8 disc vacuum filter 2.22.2×12m cylindrical dryer | 1 2 1 | 0.24 1.5t/m·d 24.5kg/m3·h | Feed water 17% to 18% | Discharge water 14% | |
9. Dressing costs: See Table 4.
Table 4 Dressing costs
Serial number | project | Unit consumption |
1 2 3 | Auxiliary material Steel ball Collector Foaming agent Conditioner Filter cloth coal Electricity Mineral processing unit cost | Kg/t·original ore 1.244 0.102 0.045 0.312 0.125m/t concentrate 1.254 20.1°/t 6.08 yuan / t |
X. Load rate and operation rate: See Table 5.
Table 5 Equipment load rate, operation rate
Workshop, equipment name | Comprehensive production capacity (rated) | Load factor% | Operating rate% |
First, the crushing workshop | 3600t/d | ||
Coarse crusher Medium crusher Fine crusher | 300t/h 265t/d 277.5t/h | 54 61 44 | 2068 20.68 20.68 |
Second, the grinding workshop | 3300t/d | ||
Grinding machine Flotation machine | 1.20t/m 3 ·h (according to the newborn - 200 mesh) 0.125m 3 /t·d | 48.66 48.66 | |
Third, dehydration workshop | 1.08t/d (concentrate) | ||
Filter Dryer | 1.58t/m 2 ·d 24.5kg/m 3 ·h |
Eleventh and three wastes treatment: tailings do not contain associated metals, no accumulation sites, so they are sent to the Jinsha River via the 6.5km open ditch to Niuchangping.
12. Investment effect: See Table 6.
Table 6 Investment effect
Total investment of the enterprise | 640.81 million yuan |
Partial mining investment | 204.53 million yuan |
Mineral processing part of fixed assets | 1176.00 million yuan |
Enterprise investment return period (year) | Policy-making loss enterprise |
Enterprise investment yield (yuan / 100 yuan) | -52.43 |
Full labor productivity (t/d), best history | 7.14, 1983: 5.06 |
Workers' labor productivity (t/person·d) is the best in history | 1983: 6.21 |
Thirteen, other:
(1) Ore image and chemical analysis: See Tables 7 and 8.
Table 7 Chemical analysis of ore
element | Cu | S | Mn | CaO | Al 2 O 3 | MgO | SiO 2 | Fe 2 O 3 | P 2 O 5 |
content% | 0.705 | 0.13 | 0.45 | 16.96 | 5.42 | 13.16 | 28.96 | 2.81 | 0.065 |
Table 8 Image analysis
element | Raw ore | Concentrate | Tailings | |||
Cu% | Distribution rate | Cu% | Distribution rate | Cu% | Distribution rate | |
Free copper oxide | 0.30 | 41.05 | 1.19 | 4.27 | 0.035 | 36.46 |
Combined copper oxide | 0.13 | 17.80 | 0.39 | 1.40 | 0.021 | 21.88 |
Active copper sulfide | 0.22 | 30.15 | 19.69 | 70.73 | 0.027 | 28.12 |
Inert copper sulfide | 0.08 | 11.00 | 6.57 | 23.60 | 0.013 | 13.54 |
Total copper | 0.73 | 100.00 | 27.84 | 100.00 | 0.096 | 100.00 |
(II) Characteristics of raw ore inlay: See Table 9.
Table 10 Raw ore inlay characteristics
Serial number | Mineral name | Inlay size mm |
1 | Chalcopyrite | 0.015~0.50 |
2 | Copper ore | 0.010~0.40 |
3 | Copper ore | 0.003～0.01 |
4 | malachite | Not easy to observe in the light |
5 | dolomite | 0.030~0.30 |
6 | quartz | 0.02 to 1.00 |
7 | Brown iron ore | Not easy to observe |
8 | Sericite | 0.02 |
(3) Storage of silos: See Table 10.
Table 10 Silo storage
Silo type | Material size mm | Storage time h | Effective volume | Silo structure characteristics |
Coarse mine | 0～450 | 1 | 250 | |
Powder mine | 0 to 3 | 3.7 | 2800 | Two |
Finished warehouse | 0 to 1 | 168 | 800 |
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