Overview of gold recovery from copper anode mud

Copper anode mud is composed of various materials in which copper anode is insoluble in electrolyte during electrolytic refining. Its composition mainly depends on the composition of copper anode, casting quality and technical conditions of electrolysis. Anode slime from copper sulfide concentrate containing more Cu, Se, Ag, Pb, Te and a small amount of Au, Sb, Bi, As and gangue minerals, platinum group metal less; and from copper-nickel The anode mud of sulfide ore contains more Cu, Ni, S and Se. The precious metal is mainly platinum group metal, and the content of Au, Ag and Pb is less. The anode mud produced by copper electrolysis contains higher Pb and Sn. . The composition of anode slime of some copper smelters at home and abroad is shown in Table 1.

Table 1 Composition of copper anode mud in some factories at home and abroad (%)

Factory Name

SiO ₂

Shenyang Smelter

Shanghai Smelter

14.96

10-20

18.96

8~15

2.821

0.3 to 0.7

29.18

3.21

3 to 5

0.76

0.5 to 0.6

14ï½ž18

White silver colored

Metal company

Yunnan Smelter

Kenny

Kurt

Canada

Copper refinery

Otto, Finland

Mixed food company

Moscow Copper Factory

Niihama, Japan

Smelter

Peruvian Oloya

Smelter

34.53

2.5

10~50

11.20

11.78

20~30

8.33

5~9

3 to 25

9.38

3.17

0 to 10

0.271

0.02

0.2

0.2 to 2

0.5

0.038

0.5 to 1.5

0.09

3.41

5~10

0.086

10~15

1.90

13.41

1 to 2

2 to 15

4.23

2.0

6 to 10

1.6

0.62

0.5 to 8

2 to 4

1.75

2.0

0.5 to 5

0.7

3 to 5

2.1

0.5

0.5 to 5

0.04

1 to 2

10.7

0.5

0.1 to 0.5

2.62

1 to 1.5

23.9

0.1 to 2

45.22

15.48

0.5

1.44

1~7

2.55

0.66

6.2

130

71.5

The phase composition of copper anode mud is relatively complicated, and various metals exist in various forms. Gold is present in a free state, but also in combination with tellurium (AgAu) Te _2; predominantly silver _{_{Ag, Ag 2 Se, Ag 2}} Te, CuAgSe, (AgAu) Te 2, AgCl; the platinum group metal occurrence state; Cu 70 % is in the form of a metal, and the remaining copper is present in the form of Cu ₂ S, Cu ₂ Se, and Cu ₂ Te. Copper anode mud is quite stable. Oxidation is not obvious at room temperature. When air is used as the oxidant, it can be slowly dissolved in sulfuric acid and hydrochloric acid, and can directly react strongly with nitric acid.

Investment casting is an industrial process based on lost-wax casting, one of the oldest known metal-forming techniques. The term "lost-wax casting" can also refer to modern investment casting processes.

Today, more advanced waxes, refractory materials and specialist alloys are typically used for making patterns. Investment casting is valued for its ability to produce components with accuracy, repeatability, versatility and integrity in a variety of metals and high-performance alloys.

The fragile wax patterns must withstand forces encountered during the mold making. Much of the wax used in investment casting can be reclaimed and reused. Lost-foam casting is a modern form of investment casting that eliminates certain steps in the process.

Investment casting derives its name from the pattern being invested (surrounded) with a refractory material. Many materials are suitable for investment casting; examples are stainless steel alloys, brass, aluminium, carbon steel and glass. The material is poured into a cavity in a refractory material that is an exact duplicate of the desired part. Due to the hardness of refractory materials used, investment casting can produce products with exceptional surface qualities, which can reduce the need for secondary machine processes.

The process can be used for both small castings of a few ounces and large castings weighing several hundred pounds. It can be more expensive than Die Casting or Sand Casting, but per-unit costs decrease with large volumes. Investment casting can produce complicated shapes that would be difficult or impossible with other casting methods. It can also produce products with exceptional surface qualities and low tolerances with minimal surface finishing or machining required.

We can supply big range of such investment Casting Parts.

B. Main particulars

	MAIN PARTICULARS
Material for product	carbon steel, alloy steel, stainless steel, aluminum alloy, zinc alloy, brass, gray iron, nodular cast iron, ductile Iron or other specified
Standard	ASTM, ASME, DIN, JIS, ISO, BS, API, EN
Certificate	ISO9001
Dimension	As per drawing, as large as we can
Processing	Step1:investment casting Step2:turning, milling, drilling, grinding, threading, CNC Machining, boring
Finishing surface	Machined surface with oil, blasting and painting, anodize, polishing, powder painting, electrophoretic coating-
Marking	as per clients` requirements
Inspection	material, construction, dimension, heat treatment, hardness, NDT
Quality	ISO9001, PPAP control production
Lead time	20-30 days for sample, consult with customer for mass production
Delivery	Express for sample, ocean shipping/air for mass production
Our Capabilities	CNC machining, CNC center machining, drilling, milling, turning, grinding, tapping, boring
Engineering & manufacturing services	R&D process, tooling and gauging design, product design Integrated CAD/CAM system, test and measuring
Others	Recyclable, in line with environmental requirements and standards, and reliable

C. Construction

Construction by investment casting

D Workmanship

The workmanship have good production practice. Care are taken to ensure High accuracy and smooth surfaces

E. Certificates

- Material certificates

- Measuring reports

- Inspection protocol

- NDT reports

- Fixed certificate: ISO9001 certificate

The photos of our Investment Casting Parts

Our service

Besides above the general specifications, we can also supply some specific machining parts as clients' requirements.

Package and shipping

Export cartons, pallets, wooden cases, Polybags

container package and container transportation

Investment Casting Parts

Investment Casting Parts,Oem Investment Casting Parts,Investment Casting Small Parts,Investment Casting Large Parts

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