A method for leaching secondary wrapped gold hematite
A secondary wrapping, hematite technology, applied in the direction of silicon dioxide, process efficiency improvement, silicon oxide, etc., can solve the problems of poor iron removal effect, complex process flow, high energy consumption, and achieve fast iron leaching speed , the effect of high iron leaching rate and low energy consumption
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Embodiment 1
[0034] Using the method for leaching secondary wrapped gold hematite to remove iron from a certain second-stage roasting cyanide tailings, wherein the gold content in the second-stage roasting cyanide tailings is as high as 13.03g / t, and the iron content is 30.60 %, specifically including the following steps:
[0035] Step 1. Take 200g of the above-mentioned second-stage calcined cyanidation tailings slag, and add the second-stage calcine cyanidation tailings slag and water into the leaching tank according to the liquid-solid ratio of 4mL / 1g to obtain a mixed pulp;
[0036] Step 2, adding solid oxalic acid and potassium oxalate into the leaching tank of step 1 according to the ratio of molar mass ratio of 1:1; adding oxalic acid and oxalate and stirring to obtain leached pulp; wherein, the leached pulp contains C 2 o 4 2- The molar mass is 3.9 times of the total iron molar mass in the second stage calcination cyanidation tailings slag;
[0037] Step 3. The leached pulp was ...
Embodiment 2
[0041] Using the method for leaching secondary gold-hematite leaching to remove iron from a certain roasted cyanide tailings, the gold content in the roasted cyanide tailings is 4g / t, and the iron content is 38.00%, specifically including the following steps:
[0042] Step 1. Weighing 200g of the above-mentioned roasted cyanide tailings, and adding the roasted cyanide tails and water into the leaching tank according to the liquid-solid ratio of 6mL / 1g;
[0043] Step 2, adding solid oxalic acid and ammonium oxalate into the leaching tank of step 1 according to the ratio of molar mass ratio of 0.98:1.05, adding oxalic acid and ammonium oxalate and stirring to obtain leached pulp, and C in the leached pulp 2 o 4 2- The molar mass of is 4.02 times of the total iron molar mass in the roasted cyanidation tailings;
[0044] Step 3. The leached pulp was stirred and leached at 90°C for 60 minutes, then filtered and separated to obtain leaching slag and leaching solution; the leaching...
Embodiment 3
[0048] Using the method for leaching secondary gold-hematite leaching to remove iron from certain sulfuric acid slag, the contents of gold, silver, copper, lead, zinc and iron in the slag are respectively 4g / t, 110g / t, and 0.6% ﹑1.0%, 2.2% and 57%, including the following steps:
[0049] Step 1, take 30g of the above-mentioned sulfuric acid slag, and add the sulfuric acid slag and water into the leaching tank according to the liquid-solid ratio of 6mL / 1g;
[0050] Step 2, adding solid oxalic acid and ammonium oxalate into the leaching tank of step 1 with a molar mass ratio of 1:1, adding oxalic acid and ammonium oxalate and stirring to obtain leached pulp, and C in the leached pulp 2 o 4 2- The molar mass is 5.2 times of the total iron molar mass in the sulfuric acid slag;
[0051] Step 3. Stir and leach the leached pulp at 80°C, filter and separate after leaching for 90 minutes, and obtain leaching slag and leaching liquid. The leaching slag is the iron removal slag, and t...
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