A method for preparing gold mine filling cementitious material by using cyanogen-containing gold tailings
A cementitious material, mine filling technology, applied in the fields of inorganic non-metallic materials, resource recycling and environmental protection, can solve the problems of difficult industrial application, high energy consumption, inability to dispose of, and achieve the effect of resource utilization
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Embodiment 1
[0037] 1) Send the cyanide-containing gold tailings into a cement kiln at 1500-1600°C for high-temperature calcination for 30 minutes; Under the condition of producing water vapor at a high temperature), the following reactions exist to achieve the purpose of completely decomposing cyanide.
[0038] HCN+0.5O 2 →HCNO
[0039] HCN+H 2 O→HCOONH 4 →NH 3 +HCOOH
[0040] 2) The gold tailings calcined at high temperature are quenched in water (water temperature 20°C) for 5 minutes to stimulate the activity of gold tailings;
[0041] 3) Formula of gold mine filling cementitious material
[0042] In terms of weight ratio, 82.5% of gold tailings after the treatment in step 2), 7.5% of cement clinker, 0.15% of reinforcing agent, and the rest is water.
[0043] The composition and weight ratio of the strengthening agent are: 12% of silane coupling agent, 30% of diethanol monoisopropanolamine, 15% of alpha-alkenyl sulfonate sodium, and the rest is water.
[0044] After testing: the...
Embodiment 2
[0046] 1) Send the cyanide-containing gold tailings into a cement kiln at 1550-1650°C for high-temperature calcination for 28 minutes; Under the condition of producing water vapor at a high temperature), the following reactions exist to achieve the purpose of completely decomposing cyanide.
[0047] HCN+0.5O 2 →HCNO
[0048] HCN+H 2 O→HCOONH 4 →NH 3 +HCOOH
[0049] 2) The gold tailings calcined at high temperature are chilled in water (water temperature 20°C) for 5 minutes to stimulate the activity of the gold tailings;
[0050] 3) Recipe for filling cementitious material in gold mines
[0051] By weight, the gold tailings treated in step 2) are 82%, cement clinker is 8%, reinforcing agent is 0.15%, and the rest is water.
[0052] The components and weight ratio of the reinforcing agent are: 12% of silane coupling agent, 28% of diethanol monoisopropanolamine, 15% of sodium α-alkenyl sulfonate, and the rest are water.
[0053] Tested: The cyanide-containing gold tailings ...
Embodiment 3
[0055] 1) Send the cyanide-containing gold tailings into a cement kiln at 1450-1550℃ for 40 minutes of high temperature calcination; Under the condition that water vapor is generated at high temperature), the following reactions exist to achieve the purpose of completely decomposing cyanide.
[0056] HCN+0.5O 2 →HCNO
[0057] HCN+H 2 O→HCOONH 4 →NH 3 +HCOOH
[0058] 2) The gold tailings calcined at high temperature are chilled in water (water temperature 20°C) for 5 minutes to stimulate the activity of the gold tailings;
[0059] 3) Recipe for filling cementitious material in gold mines
[0060] By weight, the gold tailings treated in step 2) are 83%, cement clinker 7%, reinforcing agent is 0.15%, and the rest is water.
[0061] The components and weight ratio of the reinforcing agent are: 13% of silane coupling agent, 35% of diethanol monoisopropanolamine, 12% of sodium α-alkenyl sulfonate, and the rest are water.
[0062] Tested: The cyanide-containing gold tailings ...
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