Technology for recovering pyrite from flotation tailings of lead-zinc ore

Abstract

The invention relates to a mineral processing technology, in particular to a technology for recovering pyrite from flotation tailings of lead-zinc ore, and aims at solving the problems of underground wastewater and tailings. The technology for recovering pyrite from flotation tailings of lead-zinc ore comprises the following steps: 1, dehydrating high-alkali wastewater; 2, carrying out stirring to mix size; 3, roughing the pyrite; 4, concentrating the pyrite; 5, scavenging the pyrite; and 6, neutralizing the tail water. According to the technology provided by the invention, the pyrite resources are utilized, the enterprise output value is improved, the service life of dry tailings stock yards is prolonged, the alkalinity of the tail water is reduced and then the environment protection handling expense is decreased.

Description

technical field

[0001] The invention relates to a mineral processing technology, in particular to a process for recovering pyrite from the lead-zinc ore flotation tailings by utilizing underground wastewater to treat the lead-zinc ore flotation tailings. Background technique

[0002] The world today is facing three major problems of population, resources and the environment. The worldwide environmental crisis is making mankind face unprecedented severe challenges, such as environmental pollution, ozone layer destruction, acid rain hazards, global warming, and sharp decline in biodiversity. It threatens the development of the world economy, human health and social stability. Water resources are an irreplaceable and important resource among all kinds of resources. Water resources are closely related to the environment and human development. Due to the rapid development of modern industry, industrial water pollution has become an important cause of environmental deterioration,...

Examples

Embodiment 1

[0024] Such as figure 1 Shown, a kind of technology that reclaims pyrite in the flotation tailings of lead-zinc ore, comprises the steps:

[0025] 1. Extraction of high-alkali wastewater

[0026] The lead-zinc flotation tailings slurry is introduced into the spiral classifier, and the inclination of the spiral classifier is adjusted to remove the high-alkali wastewater from the overflow port for wastewater treatment. The water returns to the lead-zinc beneficiation operation through sedimentation, and is reused for lead-zinc flotation; the ore is discharged from the sand return port and sent to the mixing tank. This part is actually a process of replacing high-alkaline water with waste water under the pit.

[0027] 2. Stirring and mixing

[0028] Add pit wastewater into the mixing tank to ensure that the pulp concentration is 30±5%, add oxalic acid 2kg / t, butyl xanthate 0.08kg / t, No. 25 black medicine 0.015kg / t per ton of raw ore, and mix well.

[0029] 3. Rough separation...

Embodiment 2

[0041] A process for reclaiming pyrite in lead-zinc ore flotation tailings, comprising the following steps:

[0042] 1. Extraction of high-alkali wastewater

[0043] The lead-zinc flotation tailings slurry is introduced into the spiral classifier, and the inclination of the spiral classifier is adjusted to remove the high-alkali wastewater from the overflow port for wastewater treatment. The water returns to the lead-zinc beneficiation operation through sedimentation, and is reused for lead-zinc flotation; the ore is discharged from the sand return port and sent to the mixing tank.

[0044] 2. Stirring and mixing

[0045] Add pit wastewater into the mixing tank to ensure that the pulp concentration is 30±5%, add oxalic acid 2.2kg / t, butyl xanthate 0.06kg / t, No. 25 black medicine 0.01kg / t per ton of raw ore, and mix well.

[0046] 3. Rough separation of pyrite

[0047] The well-mixed ore pulp is roughed by flotation machine, the foam is used as coarse concentrate, and the un...

Embodiment 3

[0055] A process for reclaiming pyrite in lead-zinc ore flotation tailings, comprising the following steps:

[0056] 1. Extraction of high-alkali wastewater

[0057] The lead-zinc flotation tailings slurry is introduced into the spiral classifier, and the inclination of the spiral classifier is adjusted to remove the high-alkali wastewater from the overflow port for wastewater treatment. The water returns to the lead-zinc beneficiation operation through sedimentation, and is reused for lead-zinc flotation; the ore is discharged from the sand return port and sent to the mixing tank.

[0058] This part is actually a process of replacing high-alkaline water with waste water under the pit.

[0059] 2. Stirring and mixing

[0060] Add pit wastewater into the mixing tank to ensure that the pulp concentration is 30±5%, add 1.8kg / t of oxalic acid, 0.13kg / t of butyl xanthate, and 0.025kg / t of No. 25 black medicine per ton of raw ore, and mix well.

[0061] 3. Rough separation of pyrit...

technical field

[0001] The invention relates to a mineral processing technology, in particular to a process for recovering pyrite from the lead-zinc ore flotation tailings by utilizing underground wastewater to treat the lead-zinc ore flotation tailings. Background technique

[0002] The world today is facing three major problems of population, resources and the environment. The worldwide environmental crisis is making mankind face unprecedented severe challenges, such as environmental pollution, ozone layer destruction, acid rain hazards, global warming, and sharp decline in biodiversity. It threatens the development of the world economy, human health and social stability. Water resources are an irreplaceable and important resource among all kinds of resources. Water resources are closely related to the environment and human development. Due to the rapid development of modern industry, industrial water pollution has become an important cause of environmental deterioration,...

Examples

Embodiment 1

[0024] Such as figure 1 Shown, a kind of technology that reclaims pyrite in the flotation tailings of lead-zinc ore, comprises the steps:

[0025] 1. Extraction of high-alkali wastewater

[0026] The lead-zinc flotation tailings slurry is introduced into the spiral classifier, and the inclination of the spiral classifier is adjusted to remove the high-alkali wastewater from the overflow port for wastewater treatment. The water returns to the lead-zinc beneficiation operation through sedimentation, and is reused for lead-zinc flotation; the ore is discharged from the sand return port and sent to the mixing tank. This part is actually a process of replacing high-alkaline water with waste water under the pit.

[0027] 2. Stirring and mixing

[0028] Add pit wastewater into the mixing tank to ensure that the pulp concentration is 30±5%, add oxalic acid 2kg / t, butyl xanthate 0.08kg / t, No. 25 black medicine 0.015kg / t per ton of raw ore, and mix well.

[0029] 3. Rough separation...

Embodiment 2

[0041] A process for reclaiming pyrite in lead-zinc ore flotation tailings, comprising the following steps:

[0042] 1. Extraction of high-alkali wastewater

[0043] The lead-zinc flotation tailings slurry is introduced into the spiral classifier, and the inclination of the spiral classifier is adjusted to remove the high-alkali wastewater from the overflow port for wastewater treatment. The water returns to the lead-zinc beneficiation operation through sedimentation, and is reused for lead-zinc flotation; the ore is discharged from the sand return port and sent to the mixing tank.

[0044] 2. Stirring and mixing

[0045] Add pit wastewater into the mixing tank to ensure that the pulp concentration is 30±5%, add oxalic acid 2.2kg / t, butyl xanthate 0.06kg / t, No. 25 black medicine 0.01kg / t per ton of raw ore, and mix well.

[0046] 3. Rough separation of pyrite

[0047] The well-mixed ore pulp is roughed by flotation machine, the foam is used as coarse concentrate, and the un...

Embodiment 3

[0055] A process for reclaiming pyrite in lead-zinc ore flotation tailings, comprising the following steps:

[0056] 1. Extraction of high-alkali wastewater

[0057] The lead-zinc flotation tailings slurry is introduced into the spiral classifier, and the inclination of the spiral classifier is adjusted to remove the high-alkali wastewater from the overflow port for wastewater treatment. The water returns to the lead-zinc beneficiation operation through sedimentation, and is reused for lead-zinc flotation; the ore is discharged from the sand return port and sent to the mixing tank.

[0058] This part is actually a process of replacing high-alkaline water with waste water under the pit.

[0059] 2. Stirring and mixing

[0060] Add pit wastewater into the mixing tank to ensure that the pulp concentration is 30±5%, add 1.8kg / t of oxalic acid, 0.13kg / t of butyl xanthate, and 0.025kg / t of No. 25 black medicine per ton of raw ore, and mix well.

[0061] 3. Rough separation of pyrit...

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