X hits on this document

PDF document

SURVEY OF U.S. MINERAL AND METAL PROCESS - page 3 / 12

25 views

0 shares

0 downloads

0 comments

3 / 12

L

before particles are separated according to size using classifiers and

by&o

qclenehvdrocvclones. pytxmidl~cal RwEssing

To Flotation

IMining

I

&i3mzidiw~d Rpcessing ToLeachir~~

Sulfwic c

Acid

To Acid Production I

c

I

1 Gas

1

I

II

~Hmy!Aegl

Fritmry

44

  • +

    Stdtirg limnce

I

J

/

O.l-0.7%Cu,

I

1

Sepuwtion 4

I

I

1 Precipitation

4

I

Recowyof

Lad, Gold

t

Electrolytic

4

Au

t

Te

t Se

SlitWS-i tt

4

Pt

Wini rg $

Pd

Refined Copper

Figure 1. Copper mining operations and by-product recovery opportunities

Sulfide copper ores are

beneficiated

to increase metal content. There are three types of

flotation cells: rougher flotation for sorting into pre-concentrate and tailings, cleaner flotation for post-treatment of the pre-concentrate, and scavenger flotation for post-treatment of the tailings. The next step is solid-fluid separation using sedimentation in settlers and thickeners with vacuum filtering by drum and disk filters. The copper content of dried chalcopyrite

concentrates

(CuFeSz)

averages 20-30

wt

%.

Copper companies are recovering copper from tailings piles; Magma BHP-Billiton Pinto is mining tailings deposited between 19 11, and 1932 at its Pinto Valley operation. Pinto Valley

hydraulically mines the tailings pile, leaches the tailings, and produces

,copper

using a solvent

facility. After the tailings are leached and washed, the remaining slurry is pumped 5 miles to an abandoned open-pit copper mine for disposal. The pile’s oldest tailings contain 0.72% Cu, while more recent deposits contain 0.11% Cu. Magma strips the

extraction’electrowinning

tcip

layer of tailings to gain access to older material that can be economically recovered

[7].

Slag tiaste

Document info
Document views25
Page views25
Page last viewedSat Dec 03 03:20:48 UTC 2016
Pages12
Paragraphs496
Words4139

Comments