Beneficiation method for replacing sodium cyanide floating lead zinc to difficultly select ore

Abstract

The invention relates to a beneficiation method for difficultly selecting lead-zinc ore, in particular to a beneficiation method for replacing sodium cyanide floating lead zinc to difficultly select ore. The beneficiation method comprises the steps of: (1) ore grinding: grinding raw ore into the ore with the material particle size being smaller than 0.074mm and being 72%-84% of the whole raw ore;(2) differential flotation of lead; and (3) differential flotation of zinc in float lead tailings. Particularly, the method adds a combined inhibitor and a combined collector in the beneficiation process to replace highly-toxic sodium cyanide selecting lead-zinc ore, so that the environmental pollution is reduced. In addition, the method is used for increasing the recovery ratio of lead-zinc concentrate, increasing the recovery ratio of precious metals including gold and silver, and increasing the economic benefit of enterprises.

Description

technical field

[0001] The invention relates to a beneficiation method for refractory ore, in particular to a beneficiation method for substituting sodium cyanide flotation for lead-zinc refractory ore. Background technique

[0002] For beneficiation of high-sulfur refractory lead-zinc ores containing pyrite and pyrrhotite, due to the difficulty of separation, it is necessary to add a large amount of sodium cyanide or potassium cyanide to obtain qualified lead concentrate products Combined with zinc sulfate to inhibit zinc-sulfur minerals, the use of such highly toxic sodium cyanide or potassium cyanide not only causes the loss of precious metals, gold and silver, but also causes serious pollution to the ring mirror by the waste discharged from the beneficiation, and also has serious damage to the production workers. Security risks.

[0003] A high-sulfur lead-zinc ore, the gangue is mainly composed of quartz, calcite, and dolomite, followed by kaolinite, sericite, feldspar...

Examples

Embodiment 1

[0069] The ore is selected from the northern Baoshan mine in Hunan:

[0070] (1) Grinding: Grinding the raw ore to a fineness of less than 0.074mm accounts for 78% of the whole raw ore;

[0071] (2) Lead priority flotation: adopt the method of one-time roughing, three-time beneficiation, two-time sweeping, and sequential return to obtain lead concentrate;

[0072] Wherein Na is added before lead roughing flotation 2 S 100g / t, sodium carbonate 200g / t, ZnSO 4 1300g / t and Na 2 SO 3 300g / t combined inhibitor, add MB xanthate 50 g / t, ethyl xanthate 20g / t and No. 25 black medicine 20g / t combined collector, add No. 2 oil 60 g / t;

[0073] Add sodium carbonate 200g / t, ZnSO 4 500g / t and Na 2 SO3 200g / t combined inhibitor, add MB xanthate 20 g / t, ethyl xanthate 10g / t and No. 25 black medicine 10g / t combined collector;

[0074] Add the combined collector of MB xanthate 20 g / t, ethyl xanthate 10 g / t and No. 25 black medicine 10 g / t before the second sweep of lead flotation;

[0075...

Embodiment 2

[0079] The ore is selected from Baoshan Western Mine 1 in Hunan:

[0080] (1) Grinding: Grinding the raw ore to a fineness of less than 0.074mm accounts for 78% of the whole raw ore;

[0081] (2) Lead priority flotation: adopt the method of one-time roughing, three-time beneficiation, two-time sweeping, and sequential return to obtain lead concentrate;

[0082] Among them, Na is added before the lead roughing flotation 2 S200g / t, sodium hydroxide 600g / t, ZnSO 4 1300g / t and Na 2 SO 3 400g / t combined inhibitor, add MB xanthate 30g / t, ethionazol 30g / t and No. 25 black drug 20g / t combined collector, add No. 2 oil 50 g / t;

[0083] Add sodium hydroxide 200g / t, ZnSO before the first sweep of lead flotation 4 600g / t and Na 2 SO 3 200g / t combined inhibitor, add MB xanthate 12 g / t, ethiazide 12g / t and No. 25 black drug 20g / t combined collector, add No. 2 oil 20 g / t;

[0084] Add MB xanthate 10g / t, ethiazide 10g / t and No. 25 black medicine 20g / t combined collector before the seco...

Embodiment 3

[0090] The ore is selected from Baoshan placer in Hunan

[0091] (1) Grinding: Grinding the raw ore to a fineness of less than 0.074mm accounts for 78% of the whole raw ore;

[0092] (2) Lead priority flotation: adopt the method of one-time roughing, three-time beneficiation, two-time sweeping, and sequential return to obtain lead concentrate;

[0093] Among them, Na is added before the lead roughing flotation 2 S 200g / t, sodium hydroxide 800g / t, ZnSO 4 1300g / t and Na 2 SO 3 500g / t combined inhibitor, the combined collector added is ethiazide 60g / t, butylamine black drug 10g / t and No. 25 black drug 40g / t;

[0094] Add sodium hydroxide 400g / t, ZnSO 4 750g / t and Na 2 SO 3 300g / t combined inhibitor, add 20g / t ethyl dithiazide, 20g / t No. 25 black medicine combined collector;

[0095] Before the second lead scavenging and flotation, the combined collectors are 20g / t of ethionazol and 20g / t of No. 25 black medicine;

[0096] (3) Priority flotation of zinc from floating lead...

technical field

[0001] The invention relates to a beneficiation method for refractory ore, in particular to a beneficiation method for substituting sodium cyanide flotation for lead-zinc refractory ore. Background technique

[0002] For beneficiation of high-sulfur refractory lead-zinc ores containing pyrite and pyrrhotite, due to the difficulty of separation, it is necessary to add a large amount of sodium cyanide or potassium cyanide to obtain qualified lead concentrate products Combined with zinc sulfate to inhibit zinc-sulfur minerals, the use of such highly toxic sodium cyanide or potassium cyanide not only causes the loss of precious metals, gold and silver, but also causes serious pollution to the ring mirror by the waste discharged from the beneficiation, and also has serious damage to the production workers. Security risks.

[0003] A high-sulfur lead-zinc ore, the gangue is mainly composed of quartz, calcite, and dolomite, followed by kaolinite, sericite, feldspar...

Examples

Embodiment 1

[0069] The ore is selected from the northern Baoshan mine in Hunan:

[0070] (1) Grinding: Grinding the raw ore to a fineness of less than 0.074mm accounts for 78% of the whole raw ore;

[0071] (2) Lead priority flotation: adopt the method of one-time roughing, three-time beneficiation, two-time sweeping, and sequential return to obtain lead concentrate;

[0072] Wherein Na is added before lead roughing flotation 2 S 100g / t, sodium carbonate 200g / t, ZnSO 4 1300g / t and Na 2 SO 3 300g / t combined inhibitor, add MB xanthate 50 g / t, ethyl xanthate 20g / t and No. 25 black medicine 20g / t combined collector, add No. 2 oil 60 g / t;

[0073] Add sodium carbonate 200g / t, ZnSO 4 500g / t and Na 2 SO3 200g / t combined inhibitor, add MB xanthate 20 g / t, ethyl xanthate 10g / t and No. 25 black medicine 10g / t combined collector;

[0074] Add the combined collector of MB xanthate 20 g / t, ethyl xanthate 10 g / t and No. 25 black medicine 10 g / t before the second sweep of lead flotation;

[0075...

Embodiment 2

[0079] The ore is selected from Baoshan Western Mine 1 in Hunan:

[0080] (1) Grinding: Grinding the raw ore to a fineness of less than 0.074mm accounts for 78% of the whole raw ore;

[0081] (2) Lead priority flotation: adopt the method of one-time roughing, three-time beneficiation, two-time sweeping, and sequential return to obtain lead concentrate;

[0082] Among them, Na is added before the lead roughing flotation 2 S200g / t, sodium hydroxide 600g / t, ZnSO 4 1300g / t and Na 2 SO 3 400g / t combined inhibitor, add MB xanthate 30g / t, ethionazol 30g / t and No. 25 black drug 20g / t combined collector, add No. 2 oil 50 g / t;

[0083] Add sodium hydroxide 200g / t, ZnSO before the first sweep of lead flotation 4 600g / t and Na 2 SO 3 200g / t combined inhibitor, add MB xanthate 12 g / t, ethiazide 12g / t and No. 25 black drug 20g / t combined collector, add No. 2 oil 20 g / t;

[0084] Add MB xanthate 10g / t, ethiazide 10g / t and No. 25 black medicine 20g / t combined collector before the seco...

Embodiment 3

[0090] The ore is selected from Baoshan placer in Hunan

[0091] (1) Grinding: Grinding the raw ore to a fineness of less than 0.074mm accounts for 78% of the whole raw ore;

[0092] (2) Lead priority flotation: adopt the method of one-time roughing, three-time beneficiation, two-time sweeping, and sequential return to obtain lead concentrate;

[0093] Among them, Na is added before the lead roughing flotation 2 S 200g / t, sodium hydroxide 800g / t, ZnSO 4 1300g / t and Na 2 SO 3 500g / t combined inhibitor, the combined collector added is ethiazide 60g / t, butylamine black drug 10g / t and No. 25 black drug 40g / t;

[0094] Add sodium hydroxide 400g / t, ZnSO 4 750g / t and Na 2 SO 3 300g / t combined inhibitor, add 20g / t ethyl dithiazide, 20g / t No. 25 black medicine combined collector;

[0095] Before the second lead scavenging and flotation, the combined collectors are 20g / t of ethionazol and 20g / t of No. 25 black medicine;

[0096] (3) Priority flotation of zinc from floating lead...

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