Copper ore dressing plant example

I. Location: Located in Yimen County, central Yunnan Province, at the junction of Shuangbai and Lufeng counties.

The highway is 114km from the mining area to Kunming and 50km from Lufeng Railway Station.

Second, the characteristics of the ore: Lion copper ore deposit account solution was warmed genus. Copper minerals are mainly copper ore, chalcopyrite and malachite, followed by chalcopyrite and blue copper ore, which are unevenly embedded in thickness; gangue minerals are mainly calcite and dolomite, followed by quartz and hydroxide. Iron , manganese hydroxide, clay, etc.

Ore hardness f = 10 ~ 14, density 2.75.

Third, the production overview: the design scale of the plant is 1800t / d, the annual processing of ore is 594,000 tons. The approved production capacity of the Industrial Census in 1985 was 1750 t/d. Ore Reserves processing plant design submitted by 1213 tonnes at 0.92%, the amount of metal 111443t. The newly added ore reserves are 3.58 million tons, the grade is 0.82%, and the metal volume is 29,431 tons. At the end of 1985, it retained 11.24 million tons of ore reserves, with a grade of 0.94% and a metal content of 105,848 tons.

The ore mined by the sub-column sublevel caving method is transported to the ropeway starting point station by the motor shaft, and is crushed by the coarse crusher and transported to the original mine bin of the selected plant by the ropeway.

The crushing process is three-stage and one-closed. The maximum feed size of the coarse crusher is 480mm, and the final product particle size after three-stage crushing is -12mm.

The grinding process is selected by stage grinding. A section of grinding 3.2×3.1m lattice ball mill and ф2.4m double spiral classifier are closed, and the graded product enters the second section mill (3.2×3.1m lattice type ball mill) through the cyclone. The second stage product enters the ф600mm cyclone, and the cyclone overflows into the flotation process. The flotation process is a rough, one sweep, four selections, and the middle mine (sweep concentrate and selected I tailings) returns to the main process head.

After the copper concentrate is concentrated, filtered and dried, the water content is ≤14%, and it is transported by car to Lufeng Railway Station, and then transported by train to Yunnan Smelter.

Beneficiation plant ready to take the following measures to automatic control: CNC dosing; flotation automatic liquid level control; pH value of automatic control; grinding fineness grade concentration control.

Fourth, the process flow: the process flow is shown in the figure below.

Figure Lion Mountain Concentrator Production Process

V. Production indicators: See Table 1.

Table 1 Production indicators

project

unit

design

Most historical

Good level

in 1980

1981

1982

1983

1984

1985

1986

year 1987

1

2

3

4

5

6

7

8

9

10

11

12

Daily throughput

t/d

1800

1085

1139

1328

1365

1501

1567

Annual throughput

t/y

59.4

28.76

33.49

39.58

39.72

46.67

47.01

Raw ore grade

Cu %

0.81

0.768

0.726

0.787

0.734

0.766

0.773

Concentrate grade

Cu %

20.20

28.52

29.25

25.24

25.24

28.64

30.72

Concentrate containing copper

10,000 tons / y

0.4451

0.1803

0.2033

0.2950

0.2950

0.314

0.3213

Recovery rate

%

92.60

81.58

83.56

83.98

86.00

87.87

88.43

6. Consumption indicators, ore dressing costs and labor productivity: See Table 2.

Table 2 Main material consumption, cost, labor productivity

project

unit

design

Best level of history

in 1980

1981

1982

1983

1

2

3

4

5

6

7

8

Yellow medicine

2 #æ²¹

lime

Sodium sulfide

Steel ball

water

k/t

k/t

k/t

k/t

Kg/t

m 3 /t

100

50

2000

160

1.1

4.76

114

49

2709

1329

0.7

104

56

3053

940

1.014

102

76

2897

389

0.845

62

76

2846

283

0.696

Power consumption

The whole plant

Grinding

°/t

°/t

38

26.9

38.98

38.09

41.12

37.75

cost

The whole plant

Mineral processing workshop

Yuan/t raw ore

Yuan/t raw ore

6.99

10.90

9.66

8.04

7.97

7.64

Labor productivity

The whole plant

Production workers

t/人·月

t/人·月

188

219

58.93

104.44

73.57

122.17

85.57

139.31

84.14

128.75

Schedule

project

unit

design

Best level of history

1984

1985

1986

year 1987

1

2

3

4

5

6

7

8

Yellow medicine

2 #æ²¹

lime

Sodium sulfide

Steel ball

water

k/t

k/t

k/t

k/t

Kg/t

m 3 /t

100

50

2000

160

1.1

4.76

71

68

1900

169

0.781

84

61

188

0.964

3.88

Power consumption

The whole plant

Grinding

°/t

°/t

38

26.9

35.37

35.26

cost

The whole plant

Mineral processing workshop

t/人·月

t/人·月

6.99

7.23

7.09

7.39

7.11

Labor productivity

The whole plant

Production workers

Yuan/t raw ore

Yuan/t raw ore

188

219

02.77

53.32

117.31

175.59

7. Main equipment production capacity: See Table 3.

Table 3 Main equipment production capacity

project

Equipment name and specifications

Number of units

Maximum throughput

First, broken mine

t/台·h

Product size mm

Drainage port width mm

Ore loose density t/m 3

Coarse

Broken

Finely broken

PEF600×900 compound pendulum jaw crusher

161650 cone crusher

220220 hydraulic short cone crusher

2

1

1

200

218

116

48

14

75

25

8

1.6

1.6

1.6

Second, grinding, grading

t/台·h

Feeding particle size mm

Grinding fineness - 200 mesh%

One section

3200×3100 lattice ball mill

22400 sunken double spiral classifier

1

1

75

-12

35

Second paragraph

3200×3100 lattice ball mill

22400 sunken double spiral classifier

600600 cyclone

1

1

4

-3

75

Third, flotation

m 3 /t·d

Working concentration%

Feeding ore size%-0.074

Rough selection

Sweep

Featured

ZZF-3

"

6A

16

16

0.043

0.031

0.144

30.09

30.51

15.00

75

Fourth, dehydration

t/m 3 ·r

Feed concentration

Mine concentration filter cake moisture%

Concentrate density t/m 3

concentrate

filter

1212m center drive concentrator

PG39-2704 filter

2

1

0.36

0.385t/m 2 ·h

9.95

64.2

64.2

18.19

3.2

3.2

dry

1.51.5×12m cylindrical dryer

1

Kg water / m 3 ·h

30

Feed water %

18.19

Discharge moisture%

13.50

8. Equipment load rate: See Table 4.

Table 4 Equipment load rate and operation rate

Workshop, equipment name

Comprehensive production capacity (rated)

Load factor%

Operating rate%

First, the crushing workshop

Medium crusher

Fine crusher

2000t/d

2000t/d

Second, grinding and floating workshop

Grinding machine

Flotation machine

1800t/d

1.079t/m 3 ·h·台

(calculated by Newborn - 200 mesh)

0.101 t/m 3 ·h·台

Third, dehydration workshop

Filter

Dryer

50t concentrate / d

50t/m 2 d

50t/d

Nine, three waste treatment

(1) Tailings Reservoir: Located in the Dasha River 4.6km away from the plant, the storage capacity is 10.4 million m3.

(2) Tailings conveying system: It is sent to the tailings pond through a three-stage pumping station along a 4.6km long trench.

X. Investment effect: There are 107 sets of existing equipment in the whole plant, the total installed capacity is 3636kW, and the total weight of the equipment is about 880t.

Eleven, other

(1) Ore phase and chemical analysis: See Table 5.

Table 5 Ore phase and chemical analysis (%)

project

Element and phase

Raw ore

Concentrate

Tailings

Object

phase

all bronze

Free copper oxide

Combined copper oxide

Primary copper sulfide

Secondary copper sulfide

0.751

0.045

0.020

0.388

0.316

0.087

0.032

0.019

0.030

0.025

Oxidation rate

5.99

Combination law

2.66

many

yuan

Prime

Au t/d

Ag t/d

Cu

Co

Mn

S

TiO

Ge

Ga

As

Zn

Pb

MgO

CaO

Al 2 O 3

Fe 2 O 3

SiO 3

0.05

1.33

0.864

0.008

0.189

0.54

0.2

0.0001

0.0003

0.013

0.006

0.006

9.02

15.02

6.34

3.86

33.36

0.3

42.25

29.10

0.15

0.048

20.7

0.24

0.0005

0.0002

0.198

0.074

0.01

2.32

3.86

2.74

23.5

11.98

0.02

0.025

0.102

0.005

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