Method for recycling high-quality iron ore from high-sulphur-content iron pyrite

Abstract

The invention discloses a method for recycling high-quality iron ore from high-sulphur-content iron pyrite. The method comprises the following steps that 1, raw ore is crushed and ground to be of 200-300 meshes, agentia A is added, and grinding continues to be carried out; 2, water is added for adjusting the concentration of flotation slurry to be 36-37%, and a collecting agent B is added; 3, 300-800 g / t carbon powder and lime water are added for adjusting the pH of the ore slurry to be 12.3 or more, stirring is carried out for 5-10 min, and the ore slurry is fed into a flotation machine for flotation for 4-8 min; 4, grinding is carried out again, 100-300 g / t carbon powder is added for grinding through a ball mill, and the size fraction of the ground ore fineness being -0.044 mm accounts for 80-90%; and 5, the material is fed into a flotation machine for flotation for 3-6 min, and therefore the high-quality iron ore is obtained. The iron concentrate grade and recycling rate are high, and sulphur is well recycled.

Description

technical field

[0001] The invention belongs to the technical field of pyrite, and specifically refers to a method for recovering high-quality iron ore from pyrite with high sulfur content. Background technique

[0002] The ore processed by some mines is high sulfur refractory iron ore. The iron minerals and sulfur minerals in the ore are mainly inlaid with medium and fine grains, and some are inlaid with coarse grains. They fill and replace each other along the fissures of each other in a veinlet shape, and it is difficult to completely dissociate the monomers during the grinding process, which has a certain impact on the flotation recovery of iron and sulfur.

[0003] The particle size of iron and sulfur mineral intercalation is uneven, the particle size of iron mineral intercalation is relatively fine, and the particle size of sulfur mineral intercalation is relatively coarse. Some iron minerals and sulfur minerals are closely combined. If the grinding size is too coars...

Examples

Embodiment 1

[0021] A method for reclaiming high-quality iron ore from pyrite with high sulfur content comprises the following steps:

[0022] (1) Crush and grind the raw ore to 200 mesh, then add agent A to continue grinding to 400 mesh, and keep the temperature at 75°C, agent A is benzothiazole mercaptan, benzimidazole mercaptan and benzoxazole mercaptan The mixture, the weight ratio of benzothiazole thiol, benzimidazole thiol and benzoxazole thiol is 1:1:3;

[0023] (2) Add water to the mineral material obtained in step (1) to adjust the concentration of the flotation pulp to 36%, add collector B, the amount of arsenate added is 2wt% of the pulp, stir for 5-7min, and then send it to the flotation machine Internal flotation for 10 minutes to obtain mixed concentrate of iron and sulfur, collector B uses arsenic acid ester;

[0024] (3) Add 300g / t of carbon powder and lime water to the iron-sulfur mixed concentrate in step (2) to adjust the pH of the slurry to 12.3 or above, stir for 5 mi...

Embodiment 2

[0028] A method for reclaiming high-quality iron ore from pyrite with high sulfur content comprises the following steps:

[0029] (1) Crush and grind the raw ore to 300 mesh, then add agent A to continue grinding to 500 mesh, and keep the temperature at 75-85°C, agent A is benzothiazole mercaptan, benzimidazole mercaptan and benzoxazole Thiol mixture, the weight ratio of benzothiazole thiol, benzimidazole thiol and benzoxazole thiol is 1:1:3;

[0030] (2) Add water to the mineral material obtained in step (1) to adjust the concentration of the flotation pulp to 37%, add collector B, the amount of arsenate added is 5wt% of the pulp, stir for 7 minutes, and send it to the flotation machine for flotation After 15 minutes, the mixed concentrate of iron and sulfur can be obtained, and the collector B adopts arsenic acid ester;

[0031] (3) Add 800g / t of carbon powder and lime water to the iron-sulfur mixed concentrate in step (2) to adjust the pH of the slurry to above 12.3, stir ...

Embodiment 3

[0035] A method for reclaiming high-quality iron ore from pyrite with high sulfur content comprises the following steps:

[0036] (1) Crush and grind the raw ore to 260 mesh, then add agent A to continue grinding to 470 mesh, and keep the temperature at 80°C, agent A is benzothiazole mercaptan, benzimidazole mercaptan and benzoxazole mercaptan The mixture, the weight ratio of benzothiazole thiol, benzimidazole thiol and benzoxazole thiol is 1:1:3;

[0037] (2) Add water to the mineral material obtained in step (1) to adjust the concentration of the flotation pulp to 36%, add collector B, the amount of arsenate added is 3wt% of the pulp, stir for 6 minutes, and send it to the flotation machine for flotation After 12 minutes, the mixed concentrate of iron and sulfur can be obtained, and the collector B adopts arsenic acid ester;

[0038] (3) Add 500g / t of carbon powder and lime water to the iron-sulfur mixed concentrate in step (2) to adjust the pH of the slurry to above 12.3, ...

technical field

[0001] The invention belongs to the technical field of pyrite, and specifically refers to a method for recovering high-quality iron ore from pyrite with high sulfur content. Background technique

[0002] The ore processed by some mines is high sulfur refractory iron ore. The iron minerals and sulfur minerals in the ore are mainly inlaid with medium and fine grains, and some are inlaid with coarse grains. They fill and replace each other along the fissures of each other in a veinlet shape, and it is difficult to completely dissociate the monomers during the grinding process, which has a certain impact on the flotation recovery of iron and sulfur.

[0003] The particle size of iron and sulfur mineral intercalation is uneven, the particle size of iron mineral intercalation is relatively fine, and the particle size of sulfur mineral intercalation is relatively coarse. Some iron minerals and sulfur minerals are closely combined. If the grinding size is too coars...

Examples

Embodiment 1

[0021] A method for reclaiming high-quality iron ore from pyrite with high sulfur content comprises the following steps:

[0022] (1) Crush and grind the raw ore to 200 mesh, then add agent A to continue grinding to 400 mesh, and keep the temperature at 75°C, agent A is benzothiazole mercaptan, benzimidazole mercaptan and benzoxazole mercaptan The mixture, the weight ratio of benzothiazole thiol, benzimidazole thiol and benzoxazole thiol is 1:1:3;

[0023] (2) Add water to the mineral material obtained in step (1) to adjust the concentration of the flotation pulp to 36%, add collector B, the amount of arsenate added is 2wt% of the pulp, stir for 5-7min, and then send it to the flotation machine Internal flotation for 10 minutes to obtain mixed concentrate of iron and sulfur, collector B uses arsenic acid ester;

[0024] (3) Add 300g / t of carbon powder and lime water to the iron-sulfur mixed concentrate in step (2) to adjust the pH of the slurry to 12.3 or above, stir for 5 mi...

Embodiment 2

[0028] A method for reclaiming high-quality iron ore from pyrite with high sulfur content comprises the following steps:

[0029] (1) Crush and grind the raw ore to 300 mesh, then add agent A to continue grinding to 500 mesh, and keep the temperature at 75-85°C, agent A is benzothiazole mercaptan, benzimidazole mercaptan and benzoxazole Thiol mixture, the weight ratio of benzothiazole thiol, benzimidazole thiol and benzoxazole thiol is 1:1:3;

[0030] (2) Add water to the mineral material obtained in step (1) to adjust the concentration of the flotation pulp to 37%, add collector B, the amount of arsenate added is 5wt% of the pulp, stir for 7 minutes, and send it to the flotation machine for flotation After 15 minutes, the mixed concentrate of iron and sulfur can be obtained, and the collector B adopts arsenic acid ester;

[0031] (3) Add 800g / t of carbon powder and lime water to the iron-sulfur mixed concentrate in step (2) to adjust the pH of the slurry to above 12.3, stir ...

Embodiment 3

[0035] A method for reclaiming high-quality iron ore from pyrite with high sulfur content comprises the following steps:

[0036] (1) Crush and grind the raw ore to 260 mesh, then add agent A to continue grinding to 470 mesh, and keep the temperature at 80°C, agent A is benzothiazole mercaptan, benzimidazole mercaptan and benzoxazole mercaptan The mixture, the weight ratio of benzothiazole thiol, benzimidazole thiol and benzoxazole thiol is 1:1:3;

[0037] (2) Add water to the mineral material obtained in step (1) to adjust the concentration of the flotation pulp to 36%, add collector B, the amount of arsenate added is 3wt% of the pulp, stir for 6 minutes, and send it to the flotation machine for flotation After 12 minutes, the mixed concentrate of iron and sulfur can be obtained, and the collector B adopts arsenic acid ester;

[0038] (3) Add 500g / t of carbon powder and lime water to the iron-sulfur mixed concentrate in step (2) to adjust the pH of the slurry to above 12.3, ...