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/台·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/台·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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