Method for recovering gold from roasting-cyaniding tailings
A technology for cyanidation tailings and gold recovery, applied in the field of gold recovery, can solve the problems of long water leaching time of roasting materials, generating a large amount of toxic gas, unfriendly roasting environment, etc., and achieves short cycle, small investment, simple and smooth process flow Effect
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Embodiment 1
[0036] Table 1 shows the analysis results of the main elements of the roasting-cyanidation tailings from a gold smelting company in Fujian.
[0037] Table 1 Analysis results of main elements of a roasting-cyanidation tailings in Fujian
[0038]
[0039] Note: "※" unit is g / t, the same below.
[0040] The method for recovering gold from roasting-cyanidation tailings comprises the following steps in sequence.
[0041] The first step ingredients: according to Na 2 O molar mass: (Fe 2 o 3 Molar mass+Al 2 o 3 Molar mass+SiO 2 Molar mass)=1.3, add sodium hydroxide to the roasting-cyanidation tailings and mix to obtain a mixture, then add water to adjust the mixture into mud block material.
[0042]The second step of sintering: send the clay lump material obtained in the first step to a high-temperature furnace, and carry out sintering at a sintering temperature of 950° C. for 60 minutes to obtain sintered clinker.
[0043] The third step is low-alkali solution leaching: f...
Embodiment 2
[0048] Table 2 shows the main element analysis results of roasting-cyanidation tailings from a gold smelting company in Shandong.
[0049] Table 2 Analytical results of main elements in a roasting-cyanidation tailing residue in Shandong
[0050]
[0051] The method for recovering gold from roasting-cyanidation tailings comprises the following steps in sequence.
[0052] The first step ingredients: according to Na 2 O molar mass: (Fe 2 o 3 Molar mass+Al 2 o 3 Molar mass+SiO 2 Molar mass)=1.5, add sodium carbonate to the roasting-cyanidation tailings and mix to obtain a mixture, then add water to adjust the mixture into mud block material.
[0053] The second step of sintering: send the clay lump material obtained in the first step to a high-temperature furnace, and carry out sintering for 40 minutes at a sintering temperature of 1000° C. to obtain sintered clinker.
[0054] The third step is low-alkali solution leaching: finely grind the clinker obtained in the second...
Embodiment 3
[0059] Table 3 shows the main element analysis results of roasting-cyanidation tailings from a gold smelting company in Hunan.
[0060] Table 3 Analytical results of main elements in a roasting-cyanidation tailing residue in Hunan
[0061]
[0062] The method for recovering gold from roasting-cyanidation tailings comprises the following steps in sequence.
[0063] The first step ingredients: according to Na 2 O molar mass: (Fe 2 o 3 Molar mass+Al 2 o 3 Molar mass+SiO 2 Molar mass)=1.0, add sodium bicarbonate to the roasting-cyanidation tailings and mix to obtain a mixture, then add water to adjust the mixture into a mud block material.
[0064] The second step of sintering: send the clay lump material obtained in the first step to a high-temperature furnace, and sinter for 30 minutes at a sintering temperature of 1100° C. to obtain sintered clinker.
[0065] The third step is low-alkali solution leaching: finely grind the clinker obtained in the second step to -0.074...
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