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Add：Xifeng Fourth Road,Hi-Tech Industry Zone, Xi'an ,China
Postal Code:710000
What problems should be paid attention to when using cyanide for mineral separation?
Time: 2023-04-12 Source: Writer:
When using cyanide for mineral separation, attention should be paid to the following specific issues:
(1) Cyanide has different inhibitory effects on different sulfide minerals, which can be divided into three categories: the first category has basically no inhibitory ability to lead, bismuth, tin, antimony, and arsenic sulfide minerals; the second category has no inhibitory ability to mercury, cadmium The sulfide minerals of zinc, silver and copper have inhibitory power, but the inhibitory power is not too strong. When using cyanide to inhibit these minerals, the amount of cyanide should be large; the third category, the inhibitory power to zinc, nickel, gold, and iron sulfide minerals Strong, can be inhibited with less cyanide. In this way, when the first type is sorted from the third type, it can be separated with less cyanide, and the effect is the best. For example, when lead and zinc are separated, cyanide is used to suppress sphalerite. When the first type and the second type are sorted, cyanide can also be used, but the amount should be large. For example, cyanide is used to inhibit copper minerals during the separation of copper-lead mixed concentrates. During the second and third types of sorting, if cyanide is used, the amount of cyanide needs to be strictly controlled, and if the amount is too large, both will be inhibited. For example, when copper and zinc are separated, copper minerals are inhibited with cyanide.
(2) Production practice shows that the inhibitory effect of cyanide on a certain mineral is related to the composition, crystal structure, origin and other factors of the mineral. For example, pyrite in high-temperature and medium-temperature hydrothermal deposits is easily inhibited by cyanide when the ratio of sulfur to iron is close to 2. Pyrite in low-temperature hydrothermal deposits, and when the ratio of sulfur to iron deviates from 2, is not easily inhibited by cyanide, and sometimes even abnormal phenomena appear, that is, it plays an activation role.
(3) Potassium ferricyanide (red blood salt) and potassium ferrocyanide (yellow blood salt) are inhibitors of secondary copper sulfide minerals. In the separation of copper-molybdenum mixed concentrate, it can be used to suppress copper and float molybdenum. In the separation of copper and zinc, when sphalerite is activated by copper ions produced by secondary copper minerals, and the inhibitory effect of potassium cyanide (sodium) is not good, the slurry of potassium ferrocyanide at pH = 6-8 can be used Moderate suppression of copper and floating zinc. Its inhibitory effect is that ferricyanide (or ferrocyanide) forms a complex colloid of copper ferricyanide (or copper ferrocyanide) on the surface of secondary copper ore, making the surface of copper mineral hydrophilic and inhibited.
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(1) Cyanide has different inhibitory effects on different sulfide minerals, which can be divided into three categories: the first category has basically no inhibitory ability to lead, bismuth, tin, antimony, and arsenic sulfide minerals; the second category has no inhibitory ability to mercury, cadmium The sulfide minerals of zinc, silver and copper have inhibitory power, but the inhibitory power is not too strong. When using cyanide to inhibit these minerals, the amount of cyanide should be large; the third category, the inhibitory power to zinc, nickel, gold, and iron sulfide minerals Strong, can be inhibited with less cyanide. In this way, when the first type is sorted from the third type, it can be separated with less cyanide, and the effect is the best. For example, when lead and zinc are separated, cyanide is used to suppress sphalerite. When the first type and the second type are sorted, cyanide can also be used, but the amount should be large. For example, cyanide is used to inhibit copper minerals during the separation of copper-lead mixed concentrates. During the second and third types of sorting, if cyanide is used, the amount of cyanide needs to be strictly controlled, and if the amount is too large, both will be inhibited. For example, when copper and zinc are separated, copper minerals are inhibited with cyanide.
(2) Production practice shows that the inhibitory effect of cyanide on a certain mineral is related to the composition, crystal structure, origin and other factors of the mineral. For example, pyrite in high-temperature and medium-temperature hydrothermal deposits is easily inhibited by cyanide when the ratio of sulfur to iron is close to 2. Pyrite in low-temperature hydrothermal deposits, and when the ratio of sulfur to iron deviates from 2, is not easily inhibited by cyanide, and sometimes even abnormal phenomena appear, that is, it plays an activation role.
(3) Potassium ferricyanide (red blood salt) and potassium ferrocyanide (yellow blood salt) are inhibitors of secondary copper sulfide minerals. In the separation of copper-molybdenum mixed concentrate, it can be used to suppress copper and float molybdenum. In the separation of copper and zinc, when sphalerite is activated by copper ions produced by secondary copper minerals, and the inhibitory effect of potassium cyanide (sodium) is not good, the slurry of potassium ferrocyanide at pH = 6-8 can be used Moderate suppression of copper and floating zinc. Its inhibitory effect is that ferricyanide (or ferrocyanide) forms a complex colloid of copper ferricyanide (or copper ferrocyanide) on the surface of secondary copper ore, making the surface of copper mineral hydrophilic and inhibited.
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Email: chemicals@oremagnetic.com