CN103420523A - Technology for treating barren rock leaching water and other acid wastewater in low-grade pyrite - Google Patents

Technology for treating barren rock leaching water and other acid wastewater in low-grade pyrite Download PDF

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Publication number
CN103420523A
CN103420523A CN2013103958997A CN201310395899A CN103420523A CN 103420523 A CN103420523 A CN 103420523A CN 2013103958997 A CN2013103958997 A CN 2013103958997A CN 201310395899 A CN201310395899 A CN 201310395899A CN 103420523 A CN103420523 A CN 103420523A
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China
Prior art keywords
water
barren rock
wastewater
leaching
treating
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Pending
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CN2013103958997A
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Chinese (zh)
Inventor
刘斌
徐继胜
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ANHUI NEW ZHONGYUAN CHEMICAL Co Ltd
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ANHUI NEW ZHONGYUAN CHEMICAL Co Ltd
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Priority to CN2013103958997A priority Critical patent/CN103420523A/en
Publication of CN103420523A publication Critical patent/CN103420523A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a technology for treating barren rock leaching water and other acid wastewater in low-grade pyrite. According to the technology for treating the barren rock leaching water and other acid wastewater in the low-grade pyrite, the barren rock storage yard leaching water is gathered in an emergency regulating reservoir, other mine acid wastewater generated during production is gathered in a general regulating reservoir, the wastewater in the general regulating reservoir is guided into a horizontal neutralization and filtration roller through an axial flow pump, red mud separation is facilitated by adding lime milk, the wastewater in the horizontal neutralization and filtration roller is pumped into a PH regulating reservoir after being treated with aeration, primary inclined pipe precipitation, secondary coagu-flocculation reaction, secondary inclined pipe precipitation, tertiary coagu-flocculation reaction and tertiary inclined pipe precipitation, the wastewater in the PH regulating reservoir is then treated in a water-collecting well, a water distribution well and a sand filter to obtain purified water, the purified water is sent into a clean-water reservoir through a water pump, and the qualified clean water in the clean-water reservoir is discharged through a single discharge outlet or directly pumped into a mineral water tower to serve as mineral water. The technology for treating the barren rock leaching water and other acid wastewater in the low-grade pyrite has the advantage that stable up-to-standard discharge and cyclic utilization of the wastewater are ensured by means of multiple levels of precipitation and coagu-flocculation reaction and adding of polyacrylamide and the lime milk.

Description

Barren rock leaching water and other process for treating acidic sewage in low grade pyrite
Technical field
The invention belongs to a kind of mine technical field of sewage, specifically barren rock leaching water and other process for treating acidic sewage in low grade pyrite.
Background technology
China is gas washing in SA production and consumption big country, and sulphuric acid output occupies first place in the world in continuous 5 years.The raw material that sulfuric acid industry adopts comprises sulfurous iron ore, sulphur and flue gas during smelting, and wherein pyrite-based sulfuric acid production output accounts for 31.3% of China's gas washing in SA production, and pyrite-based sulfuric acid production output occupies first place in the world.
At present, China's pyrite-based sulfuric acid production industry is very insufficient to the utilization of sulphur, iron resources.This is that grade is generally lower because China's sulfurous iron ore lean ore is many, rich ore is few, and grade is greater than 35% sulphur concentrate and only accounts for 10% left and right, most of even lower 20 ~ 30%.Low grade material without enrichment just direct roasting produce sulfuric acid, the slag amount is large, but the iron grade is low, sulphur content is high, should not directly be used as iron-smelting raw material, can only be used for the manufacture of cement auxiliary material by small portion, and a large amount of low-grade slags can only be piled and abandoned, contaminate environment, waste Mineral resources.
Owing to can producing the acid waste water of dust-laden, heavy metal in process of production, and the leaching sour water that produces of ettle stockyard, our factory has been formulated and has been only had a discharge of wastewater mouth for this reason, the waste water treatment target that discharged wastewater met the national standard, accident wastewater collection are processed, for practical situation, suit measures to local conditions, Waste Water Treatment has been carried out to series of process optimization and improvement, guarantee stably reaching standard discharge and the recycle of waste water.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the invention provides a kind of capable of recycling water resource, and improved barren rock leaching water and other process for treating acidic sewage in the low grade pyrite of water purification qualified rate.
The objective of the invention is to realize by following scheme:
Barren rock leaching water and other process for treating acidic sewage in low grade pyrite, it is characterized in that adopting multi stage precipitation, coagulating and interpolation polyacrylamide and milk of lime to purify liquid waste, its technical process is: in barren rock stockyard leaching water, other acid waste water → equalizing tanks of mine → horizontal and filter drum → aeration tank → tube settler → coagulation reaction tank → PH equalizing tank → pump well → distributing well → filter sand pond → clean water basin → effluent standard mouth → qualified discharge or reuse, concrete steps are as follows:
1) barren rock stockyard leaching water focuses on the emergent accident equalizing tank, and other acid waste waters of the mine in production process focus on the comprehensive adjustment pond,
2) by propeller pump by the waste water in the comprehensive adjustment pond deliver to horizontal in and in filter drum, be convenient to red mud and separate by adding milk of lime,
3) in horizontal and the waste water in filter drum be pumped into the PH equalizing tank through aeration, one-level tube settling, two-stage coagulation reaction, secondary tube settling, three grades of coagulatings, three grades of tube settlings,
4) waste water in the PH equalizing tank passes through pump well, distributing well, sand filter again, finally is purified water, by water pump, delivers to clean water basin,
5) water purification in clean water basin up to standard, carry out single discharge outlet discharge or directly in being pumped into mining water tower as mill water.
Mud after one-level tube settling in described step 3), secondary tube settling and three grades of coagulatings is transported to sludge thickener, transports Tailings Dam to after being condensed into mud cake.
Milk of lime and polyacrylamide have been added in two-stage coagulation reaction and three grades of coagulatings in described step 3).
In described step 4), the water purification of clean water basin passes through water pump back flushing sand filter again.
Further illustrate, the supernatant liquor in described sludge thickener is back to the comprehensive adjustment pond.
In low grade pyrite of the present invention, barren rock leaching water and other process for treating acidic sewage are efficient and rational, adopt multi stage precipitation, coagulating and add polyacrylamide and milk of lime raising decontamination index qualification rate, met preferably the demand of ore-dressing technique reuse water.
The accompanying drawing explanation
Fig. 1 is barren rock leaching water and other process for treating acidic sewage block diagram in low grade pyrite of the present invention.
Embodiment
As shown in Figure 1, barren rock leaching water and other process for treating acidic sewage in low grade pyrite, it is characterized in that adopting multi stage precipitation, coagulating and interpolation polyacrylamide and milk of lime to purify liquid waste, its technical process is: in barren rock stockyard leaching water, other acid waste water → equalizing tanks of mine → horizontal and filter drum → aeration tank → tube settler → coagulation reaction tank → PH equalizing tank → pump well → distributing well → filter sand pond → clean water basin → effluent standard mouth → qualified discharge or reuse, concrete steps are as follows:
1) barren rock stockyard leaching water focuses on the emergent accident equalizing tank, and other acid waste waters of the mine in production process focus on the comprehensive adjustment pond,
2) by propeller pump by the waste water in the comprehensive adjustment pond deliver to horizontal in and in filter drum, be convenient to red mud and separate by adding milk of lime,
3) in horizontal and the waste water in filter drum be pumped into the PH equalizing tank through aeration, one-level tube settling, two-stage coagulation reaction, secondary tube settling, three grades of coagulatings, three grades of tube settlings,
4) waste water in the PH equalizing tank passes through pump well, distributing well, sand filter again, finally is purified water, by water pump, delivers to clean water basin,
5) water purification in clean water basin up to standard, carry out single discharge outlet discharge or directly in being pumped into mining water tower as mill water.
Mud after one-level tube settling in described step 3), secondary tube settling and three grades of coagulatings is transported to sludge thickener, transports Tailings Dam to after being condensed into mud cake.
Milk of lime and polyacrylamide have been added in two-stage coagulation reaction and three grades of coagulatings in described step 3).
In described step 4), the water purification of clean water basin passes through water pump back flushing sand filter again.
Further illustrate, the supernatant liquor in described sludge thickener is back to the comprehensive adjustment pond.

Claims (5)

1. barren rock leaching water and other process for treating acidic sewage in low grade pyrite, it is characterized in that being to adopt multi stage precipitation, coagulating and interpolation polyacrylamide and milk of lime to purify liquid waste, its technical process is: in barren rock stockyard leaching water, other acid waste water → equalizing tanks of mine → horizontal and filter drum → aeration tank → tube settler → coagulation reaction tank → PH equalizing tank → pump well → distributing well → filter sand pond → clean water basin → effluent standard mouth → qualified discharge or reuse, concrete steps are as follows:
1) barren rock stockyard leaching water focuses on the emergent accident equalizing tank, and other acid waste waters of the mine in production process focus on the comprehensive adjustment pond,
2) by propeller pump by the waste water in the comprehensive adjustment pond deliver to horizontal in and in filter drum, be convenient to red mud and separate by adding milk of lime,
3) in horizontal and the waste water in filter drum be pumped into the PH equalizing tank through aeration, one-level tube settling, two-stage coagulation reaction, secondary tube settling, three grades of coagulatings, three grades of tube settlings,
4) waste water in the PH equalizing tank passes through pump well, distributing well, sand filter again, finally is purified water, by water pump, delivers to clean water basin,
5) water purification in clean water basin up to standard, carry out single discharge outlet discharge or directly in being pumped into mining water tower as mill water.
2. barren rock leaching water and other process for treating acidic sewage in described low grade pyrite, it is characterized in that being: the mud after the one-level tube settling in described step 3), secondary tube settling and three grades of coagulatings is transported to sludge thickener, transports Tailings Dam to after being condensed into mud cake.
3. barren rock leaching water and other process for treating acidic sewage in low grade pyrite according to claim 1, is characterized in that being: in described step 3), in two-stage coagulation reaction and three grades of coagulatings, added milk of lime and polyacrylamide.
4. barren rock leaching water and other process for treating acidic sewage in low grade pyrite according to claim 1 is characterized in that being: in described step 4), the water purification of clean water basin is by water pump back flushing sand filter again.
5. barren rock leaching water and other process for treating acidic sewage in low grade pyrite according to claim 1, it is characterized in that being: the supernatant liquor in described sludge thickener is back to the comprehensive adjustment pond.
CN2013103958997A 2013-09-04 2013-09-04 Technology for treating barren rock leaching water and other acid wastewater in low-grade pyrite Pending CN103420523A (en)

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CN2013103958997A CN103420523A (en) 2013-09-04 2013-09-04 Technology for treating barren rock leaching water and other acid wastewater in low-grade pyrite

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104944560A (en) * 2015-06-07 2015-09-30 长春黄金研究院 Quick non-ferrous metal mine acid wastewater treatment method
CN108793505A (en) * 2018-07-11 2018-11-13 常州大学 The method for handling floating cupric sulfide waste water and acidic organic wastewater simultaneously

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100783754B1 (en) * 2006-12-14 2007-12-07 (주) 테크윈 The process & equipments pva wastewater treatment for chemical and activated sludge
CN101628763A (en) * 2009-08-06 2010-01-20 河南豫光锌业有限公司 Processing equipment and technique for waste acid and water
CN101648757A (en) * 2009-09-01 2010-02-17 浙江大学 Recycling processing method for stainless steel processing process wastewater grading precipitation
CN101875518A (en) * 2010-07-01 2010-11-03 陈启松 Treatment method of stainless steel pickling waste water

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100783754B1 (en) * 2006-12-14 2007-12-07 (주) 테크윈 The process & equipments pva wastewater treatment for chemical and activated sludge
CN101628763A (en) * 2009-08-06 2010-01-20 河南豫光锌业有限公司 Processing equipment and technique for waste acid and water
CN101648757A (en) * 2009-09-01 2010-02-17 浙江大学 Recycling processing method for stainless steel processing process wastewater grading precipitation
CN101875518A (en) * 2010-07-01 2010-11-03 陈启松 Treatment method of stainless steel pickling waste water

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104944560A (en) * 2015-06-07 2015-09-30 长春黄金研究院 Quick non-ferrous metal mine acid wastewater treatment method
CN108793505A (en) * 2018-07-11 2018-11-13 常州大学 The method for handling floating cupric sulfide waste water and acidic organic wastewater simultaneously

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Application publication date: 20131204