Gold smelting boiling roasting furnace slurry type feeding producing process and its producing device

Abstract

The present invention relates to gold smelting technology, and is especially slurry type feeding production process and apparatus of gold smelting fluidizing roaster. The production process includes the steps of: mixing aurine ore, water and assistant in a mixing tank to obtain slurring with solid content of 60-70 % via stirring; stirring in the slurry storing tank for over 4 hr; feeding the slurring into high position tank and flowing naturally to the spray gun; and mixing compressed air with the slurry in the spray gun and spraying atomized slurry with three spray guns into the fluidized bed furnace for sulfurization roasting. The present invention has the advantages of no need of material drying yard and drying apparatus, homogeneous granularity reaching short cyaniding and leaching time, stable fluidizing roaster temperature, etc.

Description

1. Technical field [0001] The present invention relates to a gold smelting boiling roasting furnace slurry type feed production process and its production device, which is a fluidized bed fluidized bed furnace roasting process and equipment for wet gold smelting, especially a sulphating fluidized bed furnace roasting process and equipment, which belongs to the gold smelting roasting process and field of equipment technology. 2. Background technology [0002] Precious metals such as gold and silver are generally associated with oxide ores and sulfide ores in the form of simple substances. At present, the methods of extracting gold and silver from minerals generally use direct cyanidation and roasting cyanidation, which is the so-called hydrometallurgical method. [0003] The roasting process technology and equipment technology described in the present invention are specially proposed for the sulfide ore roasting and cyanidation method. For sulfide gold concentrate, it genera...

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Problems solved by technology

[0005] 1. It needs a large drying yard or drying equipment, especially when natural drying is used, dust and metal loss will be generated, the working environment is very poor, and a lot of energy will be wasted when drying with a dryer, and the economy is poor;

[0006] 2. The dried material needs to be crushed and screened. Not only does it need to increase the crushing and screening equipment, but also because the gold concentrate will re-agglomerate during the drying process, the particle size of the screened material will increase, and the slag particle size will be uneven, resulting in The leaching time is extended when cyanide extracts gold and silver;

[0007] 3. The temperature of the fluidized bed furnace should not be controlled. The temperature of sulfation roasting is generally controlled at 620-680°C. However, due to the high sulfur content in the gold concentrate, the temperature of the fluidized bed furnace can reach 850-950°C, or even above 1000°C. Therefore, in order to maintain The temperature conditions of sulfation roasting need to be solved by controlling the amount of feed and increasing the boiling layer water tank of the fluidized furnace, which causes the temperature of the fluidized furnace to be unstable, and the concentration of SO2 in the furnace gas is not uniform, resulting in poor operational stability of the entire system;

[0008] 4. The boiling layer of the fluidized furnace needs to be equipped with a special cooling water tank, which is easy to corrode and damage, and the maintenance cost is relatively high;

[0009] 5. The feeding port of fluidized fluidized furnace is easy to be blocked, and material breakage often occurs, which makes the concentration of SO2 in the flue gas fluctuate greatly, resulting in unstable operation of the acid making system

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