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The process design of gold leaching and carboninpulp circuits 14 JANUARY/FEBRUARY 1999 The Journal of The South African Institute of Mining and Metallurgy Figure 2—The CarbonInPulp (CIP) process Figure 1—ComputerAided Process Engineering (Cape)
This chapter focuses on the advances made in the design and operation of carboninpulp (CIP) and carboninleach (CIL) plants. Most of the advances over the last few years have been in the area of carbon management. Trends towards cyanidefree elution are becoming more prevalent, impacting positively on operating costs.
and carboninpulp into a single unit process operation. Leach tanks are fitted with carbon retention screens and the CIP tanks are eliminated. Carbon is added in leach so that the gold is adsorbed onto carbon almost as soon as it is dissolved by the cyanide solution. The CIL process is frequently used when native carbon is present in the gold ore.
The design of the screens had been developed and tested by the Merrill Co. in a 50 st/d pilot plant that established screen capacity as a function of pulp density, carbon concentration, and screen mesh. Operation of the trommel screens was never considered entirely successful. Mechanical support of the screens was unsatisfactory, partially ...
The efficient design of carboninpulp () plants involves the integration of both process engineering and design engineering. Many recently constructed plants have not recognised the above interrelationship, and as such have incurred higher capital and operating costs than were in reality necessary. This has been compounded in some cases by slavishly following the design of...
Carboninpulp (CIP) is the sequential leach then absorption of gold from ore. During the CIP stage, pulp flows through several agitated tanks where sodium cyanide and oxygen have been added to dissolve gold into solution. In the absorption stage, this solution flows through several agitated tanks containing activated carbon.
ABSORPTION OF GOLD CYANIDE ONTO ACTIVATED CARBON: I. THE KINETICS OF ABSORPTION FROM PULPS. ... The process design of gold leaching and carboninpulp .
Two primary methods, Carbon In Pulp (CIP) and Carbon Columns probably comprise the most widely utilized techniques for extracting gold, now days. In CIP, the carbon is mixed with the cyanide leach solution, and agitated in the leach tanks, and agitated with the ore while the gold is being dissolved.
The carboninpulp method also uses cyanide, but utilizes carbon instead of zinc to precipitate the gold. gold smelting. If the gold is still not pure enough, it can be smelted. Smelting involves heating the gold with a chemical substance called flux. The flux bonds with the contaminants and floats on top of the melted gold. The gold is then ...
The Bureau of Mines investigated the applicability of carboninpulp process for recovering silver from lowgrade ores. The reasons for the research were to illustrate a practical procedure for the process design of carboninpulp adsorption circuits using leach slurries and simple equipment, and to ...
is reduced from 150 oz Au/ton of carbon to less than 3 oz. Au/ton of carbon. The Zadra process is characterized by simplicity of system design and operation. Mild steel equipment is normally used. Manual control is the standard.
Carbon in pulp (CIP) is an extraction technique for recovery of gold which has been liberated into a cyanide solution as part of the gold cyanidation process. Introduced in the early 1980s, Carbon in Pulp is regarded as a simple and cheap process.
In the gold beneficiation process, activated carbon is a vital tool, used to separate gold that has been dissolved in a cyanide solution, so that it can be recovered. The Gold Cyanidation Process. The gold cyanidation process is a series of steps that vary depending on the .
Feb 18, 2011· CarbonInColumn (CIC): With carbonincolumn operation, solution flows through a series of fluidized bed columns in an upflow direction. Columns are most frequently open topped, but .
Small Scale . Carbon in Pulp extraction plants. 20/40 and 50/60 tons per day Units Preamble. The concept of the smallscale agitated leach unit was to design and build an agitated leach system for the smallscale mining industry, with a capacity equivalent to .
CHAPTER 3. ACTIVATED CARBON COLUMNS PLANT DESIGN 112 applications. The principle limitation is related with the pressure drop. It was checked that it was not too high, so the final choice was FILTRASORB 400 .
CarboninPulp (CIP) and CarboninLeach (CIL) processes have surface areas of about 1000 m²/g one gram of activated carbon (the amount of which will occupy the same space as the end of a person''s thumb) has the same surface area as two football fields. The high surface area is contained in the millions of pores of varying sizes, these being
Design Criteria . In the carboninpulp process activated carbon is mixed with a ground ore plus water slurry in which gold and silver cyanides are dissolved. After the precious metals are adsorbed onto the carbon, the loaded carbon is separated from the pulp and stripped. The barren pulp is disposed of as tailings and the precious metals are ...
A Smarter Approach to CarboninPulp (CIP) and ResininPulp (RIP) Applications. The Pumpcell circuit is a process route used for CIP or RIP applications. The Pumpcell represents a new approach to the design of conventional cascade CIP adsorption circuits.
This information can be used (with adsorption kinetics) to design and evaluate CarboninPulp (CIP), CarboninLeach (CIL) and CarboninColumn (CIC) circuits for gold when copper may be present. Hydrometallurgy. 9. In recent years, the use of ultrasound in leaching processes is becoming increasingly popular in hydrometallurgy.
Activated carbon effectively removes the gold from the cyanide, as the gold is adsorbed into the pores in the carbon. This has spawned technologies such as CIP (carboninpulp), CIL (carboninleach) and CIC (carbonincolumns). More recently, SGS has lead the gold processing industry with the development of resinbased technologies.
Carbon in Pulp. Gold Carboninpulp (CIP) production is the sequential leach then absorption of gold from ore. During the CIP stage, pulp flows through several agitated tanks where sodium cyanide and oxygen have been added to dissolve gold into solution. Email: [email protected]
showed that carbon isolated in a stage of a carbonin pulp plant had not reached equilibrium after 300 hours. It is for this reason that the rate of adsorption is the most important factor governing the design and optimiza tion of the adsorption circuit. The factors affecting adsorption can be broadly split into two:
the activated carbon is moved from one tank to another in countercurrent with the ore pulp until the recovery of the loaded carbon in the first tank. This paper presents a dynamic model that describes, with minor changes, the carboninleach, the carboninpulp, and .
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