Vairākas lietas, kas jums jāzina par zelta cianidāciju

zelta cianidēšana is a method of extracalvag zelts usiNg cianīdu kā Izskalošanās līdzeklis. Sakarā ar to MAture technical level, high Izskalošanās ātrums, and strong applicability to ores, the Cianizācija method remains one of the main Zelta ieguve methods at present. In the Zelta cianidēšana process, every step must be controlled to ensure good Ekonomiskie ieguvumi while reducing equipment weight and investment.

1. Aeration and cianīda pievienošana

Pēc slīpēšanas, cianīdu is added to the mīkstums to dissolve gold and form Metāla kompleksi. reakcija formula is as follows: 4Au + 8NaCN + O2 + 2H2O → 4NaAu(CN)2 + 4NaOH. As can be seen from the above formula, oxygen is required in the process of Izskalošanās gold. Therefore, in rūpnieciskā ražošana, tad izskalošanās tank needs to be aerated. The aeration pressure is generally about 1 kg, and the aeration volume per minute for eACH cubic meter of slurry is greater than 0.002 m³.

2. Pievienošana aizsargājošs sārms

To ensure the concentration of Cianīds in the pulp, avoid Vides piesārņojums, and prevent the generation of toksisksCiānūdeņradis (HCN) gas, alkali must be added to the leaching tank to maintain a high pH vērtība of the pulp. Laims or lime milk is often used in Rūpnieciskā ražošana, and sometimes NaOH is added for sUPplementary adjustment.

3. Vircas suspensijas uzturēšana

The zelta cianizācijas process has certain Prasības priekš Veiktspēja of the leaching agitation tank. With low power patēriņš, the particles of monomer-separated or exposed surface gold in the pulp should not deposit in the tank. The pulp, cyanide, lime, and air should be fully mixed in the tank to reach a suspended state. The slurry concentration in each part of the tank should be consistent, and there should be no stratification along the depth direction of the tank, and the particle size distribution should be uniform.

4. Atbilstošas ​​vircas koncentrācijas uzturēšana

Kad Blīvums of Zelta rūda ir 2.65 - 2.8. the general leaching pulp concentration is 40 - 45%. When the density of flotācija concentrate is 3 - 3.5. the general leaching concentration is 30 - 40%. Generally, materiāli with a fineness less than 200 mesh account for 80 - 95%.

5. Kustīgo daļu nodiluma un trokšņa samazināšana

To reduce the wear of the agitator and increase its service life, most impellers in industrial ražošana ir gumija-lined. The selection of the transmission device should be meticulous to ensure high transmission efektivitāte and low noise.

6. Oglekļa nodiluma samazināšana

The Ogleklis-in-pulp method adds carbon to the Adsorbcija tank to adsorb gold. If the agitation force of the leaching tank is too strong, the carbon will be ground and lost. If the agitation force is weak, sediment will be generated. Therefore, while maintaining the pulp in a suspended state, on the one hand, it is necessary to select high-hardness carbon for production, and on the other hand, it is necessary to reduce the rotation speed of the impeller to reduce the loss of pulp, carbon, and the input power of the agitation adsorbcija tvertne.

7. DeterKalnrūpniecība Appropriate CaPACbas

Pašlaik apstrāde capacity of common Zelta cianidēšanas rūpnīcas ranges from several tens of tons to tens of thousands of tons per day. The larger the production capacity, the larger the plant area, and the larger the equipment specifications and investment. Each mine owner must determine an appropriate processing plant capacity according to the actual situation.

8. Iekārtu svara un investīciju samazināšana

When selecalvag the leaching tank, on the one hand, the izskalošanās process is required to be efficient and energy-saving, and at the same time, the transmission device is required to have a small footprint and light weight. When the capacity, pulp concentration, and izskalošanās laiks are determined, the number of izskalošanās tvertnes can be determined. However, the specifications of the leaching tanks should be suitable for the plant capacity. When building a 500t/d Zelta cianidēšana plant, if a φ3.5X3.5m leaching tank is used, the required equipment needs to be increased, increasing the investment. Therefore, only with light equipment and an appropriate capacity can the būvniecība investment of the enterprise be reduced.