NK-1 and MG withdraw gold from wastewater containing trace amounts of gold

January 20, 2024

First, NK-1 activated carbon
Nankai University has studied an NK-1 activated carbon that can extract gold from waste water containing trace amounts of gold.
The NK-1 activated carbon can effectively extract gold from wastewater by static and dynamic tests (Au concentration is about 0.05×10 -4 %). The adsorption rate is 97.1%.
When NK-1 activated carbon was loaded with gold, the adsorbent was soaked in 1% NaCN and 5% NaOH mixed solution for 4 h, and then rinsed with 2 to 3 bed volumes of acetone. The rinsing efficiency was 97.2% to 97.7%.
This new type of adsorbent has broad prospects.
Second, MG polymer flocculation
In hydrometallurgical hydrometallurgy, gold is present in the leaching solution of HAuCl 4 , in order to solve the gold recovery of AuCl 4 - concentration at 5μg/ml, the Polymer Research Institute of Sun Yat-sen University proposed to recover the gold in the high-frequency flocculation system. gold. The MG cationic polymer, and sodium tripolyphosphate and sodium thiosulfate effect of the ligands on the gold formulated flocculation system, their recovery rate of 90% to 95%, flocculation and sedimentation can be obtained by burning gold . The suitable conditions for the recovery of gold and the flocculation mechanism of MG/Na 5 P 3 O 10 were studied.

Hot Air Circulation Oven

The Industrial Tray Dryer Oven Machine adopts the fan circulation air supply method, and the air circulation is uniform and efficient. The air source is driven by a circulating air supply motor (using a non-contact switch) to drive the wind wheel through the heater, and the hot air is sent out, and then goes through the air duct to the inner room of the oven, and then the used air is sucked into the air duct to become the air source for recirculation. Use heated. Ensure room temperature uniformity. When the temperature value swings due to door opening and closing action, the air supply circulation system quickly returns to the operating state until it reaches the set temperature value.

•The heating source includes steam, electricity, infrared ray, and dual use of steam and electricity.

•Working temperature: steam heating 50-140℃,maximum 150℃.

•Working temperature is 50-500℃ if electricity or infrared ray is adopted.

•Automatic control system and computer control system are available for selection by users.

•Common steam pressure is 0.02-0.8Mpa(0.2-8kg/cm²).

•For electric heating, 15kw if calculated according to I type, actual 5-8kw/h.

•Please indicate any special requirements when placing orders.

•The price of nonstandard ovens is negotiable.

•Please indicate if the working temperature is more than 140℃ or less then 60℃ when placing orders.

•The drying carts and drying discs have uniform dimensions at delivery and are interchangeable.

•Drying disc dimensions: 460*640*45(mm).

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Jiangyin Jirui Machinery Manufacturing Co,LTD , https://www.jiruimachine.com

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