CN105236636A - Gold ore manganese-containing wastewater treatment method - Google Patents
Gold ore manganese-containing wastewater treatment method Download PDFInfo
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- CN105236636A CN105236636A CN201510655816.2A CN201510655816A CN105236636A CN 105236636 A CN105236636 A CN 105236636A CN 201510655816 A CN201510655816 A CN 201510655816A CN 105236636 A CN105236636 A CN 105236636A
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Abstract
The invention discloses a gold ore manganese-containing wastewater treatment method comprising the following steps: regulation, precipitation, illuminating, secondary regulation, coagulation, and discharging. By adding an additive in the treatment process, the treatment process is simplified, and a flocculation body can be rapidly formed, so as to be rapidly removed from water; with cooperation of ultraviolet light illumination disinfection, the influence of wastewater discharge on the environment is greatly reduced; the additive in the method is an additive obtained by compounding together a plurality of additives with complementary characteristics; because the plurality of additives have different hydrolysis mechanisms and have self advantages and disadvantages and application ranges, for playing the advantages of single additive and making up the disadvantages of single additive, more than two additives are compounded for use to achieve the effect of adopting advantages and avoiding disadvantages; the method is good in treatment effect, high in treatment efficiency and simple in process, and is an excellent manganese ore wastewater treatment method.
Description
Technical field
Waste gas and waste liquid technical field of comprehensive utilization of the present invention, is specifically related to a kind for the treatment of process of gold mine Mn-bearing waste water.
Background technology
Manganese is one of important heavy metal monitoring index of ambient water quality pollutent, because China's manganese ore deposit mostly is middle-size and small-size mineral deposit, constrains the scale that Manganese Mine is built, and existing Manganese Mine throughput is general less.Whole nation year consumes manganese ore 1,000 ten thousand more than t, occupy first place in the world, but China's manganese resource lacks relatively, rich ore is less, due to the restriction of each side such as equipment and treatment technology in the exploitation and deep-processing process of a large amount of manganese ore, make polluting containing manganese waste material and Mn-bearing waste water of China comparatively serious, manganese ore mine water pollution can be divided into mineral pollution, Organic pollutants and bacterial contamination.Radio contamination and thermal pollution is also there is in some mine.Mineral pollution has sand, mud particle, dirt, dust, solvency, bronsted lowry acids and bases bronsted lowry etc.; Organic pollutants have the oxidative degradation products of grease, biological metabolic product, timber and other materials.Bacterial contamination is mainly by the pollution of the rock dust, breeze and the associated mineral that are scattered in exploitation, transportation.One large feature of manganese ore pit water is that mn ion content is high, and the manganese in pit water is dissolved in caused by water by the oxide compound of manganese in rocks and minerals, sulfide, carbonate and silicate etc.In oxidising process, manganese moves and generate Mn2 ﹢ in water, and therefore in pit water, manganese mainly exists with Mn2 ﹢ form.In mining process, discharge a large amount of waste water barren rock from down-hole, pollute river, occupy a large amount of farmland, mountain forest, grassland, destroy the eubiosis.
In present water, the harm of manganese has caused the most attention of people, but Mn2 ﹢ rate of oxidation is in neutral conditions very slow, is difficult to be oxidized to Manganse Dioxide by dissolved oxygen.In general, when pH value >7.0, comparatively fast, under identical pH value condition, the oxidation of Mn2 ﹢ is much slower than Fe2 ﹢, and thus in water, the removal of manganese is more much more difficult than iron for the rate of oxidation of the Fe2 ﹢ in underground water.When pH value >9.0, the rate of oxidation of Mn2 ﹢ is just obviously accelerated, Mn2 ﹢ promptly could be oxidized to MnO2 and separate out by dissolved oxygen, thus initial usually through adding the pH value of alkaline matter raising water or adding the chemical process demanganization that strong oxidizer etc. accelerates Mn2 ﹢ rate of oxidation, the present inventor, by carrying out research and analysis to Mn-bearing waste water pollution problem, proposes a kind for the treatment of process of gold mine Mn-bearing waste water.
Summary of the invention
The present invention aims to provide a kind for the treatment of process of gold mine Mn-bearing waste water, to solve numerous manganese ore wastewater treatment difficulty, contaminate environment, the problem that impact is ecological.
The present invention is achieved by the following technical programs:
A treatment process for gold mine Mn-bearing waste water, the method comprises the following steps:
A, adjustment: in manganese ore waste water, add additive, control the pH value > 9.5 of waste water in reaction process, the reaction times is 20-25min;
B, precipitation: waste water, according to after the waste water 5-10min after the linear velocity stirring reaction of regulation, is put into settling tank and left standstill 25min, by the MnO that reaction generates by clockwise direction
2get rid of through being separated;
C, irradiation: uviolizing process is carried out to the supernatant liquor of waste water, irradiation time is 5-10min;
D, Secondary Control: in the supernatant liquor through radiation treatment, add strong oxidizer, continue to stir 5-10min, then leave standstill 20min;
E, coagulation: in supernatant liquor, add flocculation agent, leave standstill 15min after continuing to stir 10min; F, discharge: the precipitate and separate after leaving standstill got rid of, the waste water processed can be sent in pond and get rid of, or directly discharges.
Additive in described step a is made up of following raw material: polymerize aluminum chloride 12 parts, bodied ferric sulfate 10 parts, polyacrylamide 9 parts, ferric chloride hexahydrate 15 parts, hydrated manganese dioxide 6 parts, hydrous iron oxide 6 parts.
The preparation method of the additive in described step a comprises the following steps:
(1), hydrated manganese dioxide preparation: adding the manganese sulfate solution of 10% to reaction end in the potassium permanganate solution of 15%, generate chocolate manganese dioxide precipitate, obtaining pressed powder by descending air seasoning after sedimentation and filtration at the temperature of 60-100 DEG C;
(2), hydrous iron oxide preparation: by 0.1mol/LFeCl
3pH value of water solution is adjusted to 2-3, is slowly heated to 75 DEG C of insulation 1.5h in water-bath, first a small amount of containing after the water washing once of ammonia with containing, use distilled water wash again, through centrifugation, being placed in baking oven control temperature is 55 DEG C of dryings, and it is for subsequent use that powdery solid is made in grinding;
(3), mix: get polymerize aluminum chloride, bodied ferric sulfate, polyacrylamide, ferric chloride hexahydrate, potassium permanganate by weight and mix with hydrated manganese dioxide, hydrous iron oxide and namely obtain additive finished product.
Stirring linear velocity in described step b is 15-20m/s.
The irradiation distance of described step c middle-ultraviolet lamp radiation treatment is 15-20cm.
Strong oxidizer in described steps d is potassium permanganate.
The flocculation agent added in described step e is iron trichloride.
Beneficial effect of the present invention is: the present invention in treating processes by adding additive, simplify processes process, flocs unit can be formed fast, to remove from water rapidly, the illumination-based disinfection of combined with ultraviolet radiation, significantly reduce the impact of waste water eliminating on environment, present method additive is the additive being combined with each other by the additive of several characteristic complementation and obtaining, because various additive Hydrolytic Mechanism is different and have respective relative merits and the scope of application, in order to play the advantage of each single additive, compensate its defect, therefore by two or more additive compound use to reach the effect of maximizing favourable factors and minimizing unfavourable ones, present method treatment effect is good, processing efficiency is high, technique is simple, it is a kind for the treatment of process of excellent manganese ore waste water.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is further described, but described in claimed scope is not limited to.
Embodiment one
Formula: polymerize aluminum chloride 12 parts, bodied ferric sulfate 10 parts, polyacrylamide 9 parts, ferric chloride hexahydrate 15 parts, hydrated manganese dioxide 6 parts, hydrous iron oxide 6 parts.
The treatment process of gold mine Mn-bearing waste water:
A, adjustment: in manganese ore waste water, add additive, control the pH value > 9.5 of waste water in reaction process, the reaction times is 20min;
B, precipitation: it is after the waste water 5min after 15m/s stirring reaction that clockwise direction stirs linear velocity according to the rules, put into settling tank and leave standstill 25min, by the MnO that reaction generates by waste water
2get rid of through being separated;
C, irradiation: uviolizing process is carried out to the supernatant liquor of waste water, irradiation distance is 15cm, irradiation time is 5min;
D, Secondary Control: in the supernatant liquor through radiation treatment, add potassium permanganate, continue to stir 5-10min, then leave standstill 20min;
E, coagulation: in supernatant liquor, add iron trichloride, leave standstill 15min after continuing to stir 10min;
F, discharge: the precipitate and separate after leaving standstill got rid of, the waste water processed can be sent in pond and get rid of, or directly discharges.
Embodiment two
Formula: polymerize aluminum chloride 12 parts, bodied ferric sulfate 10 parts, polyacrylamide 9 parts, ferric chloride hexahydrate 15 parts, hydrated manganese dioxide 6 parts, hydrous iron oxide 6 parts.
The treatment process of gold mine Mn-bearing waste water:
A, adjustment: in manganese ore waste water, add additive, control the pH value > 9.5 of waste water in reaction process, the reaction times is 25min;
B, precipitation: it is after the waste water 10min after 20m/s stirring reaction that clockwise direction stirs linear velocity according to the rules, put into settling tank and leave standstill 25min, by the MnO that reaction generates by waste water
2get rid of through being separated;
C, irradiation: uviolizing process is carried out to the supernatant liquor of waste water, irradiation distance is 20cm, irradiation time is 10min;
D, Secondary Control: in the supernatant liquor through radiation treatment, add potassium permanganate, continue to stir 10min, then leave standstill 20min;
E, coagulation: in supernatant liquor, add iron trichloride, leave standstill 15min after continuing to stir 10min;
F, discharge: the precipitate and separate after leaving standstill got rid of, the waste water processed can be sent in pond and get rid of, or directly discharges.
Embodiment three
Formula: polymerize aluminum chloride 12 parts, bodied ferric sulfate 10 parts, polyacrylamide 9 parts, ferric chloride hexahydrate 15 parts, hydrated manganese dioxide 6 parts, hydrous iron oxide 6 parts.
The treatment process of gold mine Mn-bearing waste water:
A, adjustment: in manganese ore waste water, add additive, control the pH value > 9.5 of waste water in reaction process, the reaction times is 23min;
B, precipitation: it is after the waste water 8min after 18m/s stirring reaction that clockwise direction stirs linear velocity according to the rules, put into settling tank and leave standstill 25min, by the MnO that reaction generates by waste water
2get rid of through being separated;
C, irradiation: uviolizing process is carried out to the supernatant liquor of waste water, irradiation distance is 18cm, irradiation time is 8min;
D, Secondary Control: in the supernatant liquor through radiation treatment, add potassium permanganate, continue to stir 8min, then leave standstill 20min;
E, coagulation: in supernatant liquor, add iron trichloride, leave standstill 15min after continuing to stir 10min;
F, discharge: the precipitate and separate after leaving standstill got rid of, the waste water processed can be sent in pond and get rid of, or directly discharges.
Claims (7)
1. a treatment process for gold mine Mn-bearing waste water, is characterized in that: the method comprises the following steps:
A, adjustment: in manganese ore waste water, add additive, control the pH value > 9.5 of waste water in reaction process, the reaction times is 20-25min;
B, precipitation: waste water, according to after the waste water 5-10min after the linear velocity stirring reaction of regulation, is put into settling tank and left standstill 25min, by the MnO that reaction generates by clockwise direction
2get rid of through being separated;
C, irradiation: uviolizing process is carried out to the supernatant liquor of waste water, irradiation time is 5-10min;
D, Secondary Control: in the supernatant liquor through radiation treatment, add strong oxidizer, continue to stir 5-10min, then leave standstill 20min;
E, coagulation: in supernatant liquor, add flocculation agent, leave standstill 15min after continuing to stir 10min;
F, discharge: the precipitate and separate after leaving standstill got rid of, the waste water processed can be sent in pond and get rid of, or directly discharges.
2. the integrated conduct method of manganese ore waste water according to claim 1, is characterized in that: the additive in described step a is made up of following raw material: polymerize aluminum chloride 12 parts, bodied ferric sulfate 10 parts, polyacrylamide 9 parts, ferric chloride hexahydrate 15 parts, hydrated manganese dioxide 6 parts, hydrous iron oxide 6 parts.
3. the treatment process of gold mine Mn-bearing waste water according to claim 1, is characterized in that: the preparation method of the additive in described step a comprises the following steps:
(1), hydrated manganese dioxide preparation: adding the manganese sulfate solution of 10% to reaction end in the potassium permanganate solution of 15%, generate chocolate manganese dioxide precipitate, obtaining pressed powder by descending air seasoning after sedimentation and filtration at the temperature of 60-100 DEG C;
(2), hydrous iron oxide preparation: by 0.1mol/LFeCl
3pH value of water solution is adjusted to 2-3, is slowly heated to 75 DEG C of insulation 1.5h in water-bath, first a small amount of containing after the water washing once of ammonia with containing, use distilled water wash again, through centrifugation, being placed in baking oven control temperature is 55 DEG C of dryings, and it is for subsequent use that powdery solid is made in grinding;
(3), mix: get polymerize aluminum chloride, bodied ferric sulfate, polyacrylamide, ferric chloride hexahydrate, potassium permanganate by weight and mix with hydrated manganese dioxide, hydrous iron oxide and namely obtain additive finished product.
4. the treatment process of gold mine Mn-bearing waste water according to claim 1, is characterized in that: the stirring linear velocity in described step b is 15-20m/s.
5. the treatment process of gold mine Mn-bearing waste water according to claim 1, is characterized in that: the irradiation distance of described step c middle-ultraviolet lamp radiation treatment is 15-20cm.
6. the treatment process of gold mine Mn-bearing waste water according to claim 1, is characterized in that: the strong oxidizer in described steps d is potassium permanganate.
7. the treatment process of gold mine Mn-bearing waste water according to claim 1, is characterized in that: the flocculation agent added in described step e is iron trichloride.
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Cited By (1)
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| CN106587430A (en) * | 2016-12-19 | 2017-04-26 | 华中科技大学 | Treatment method of simultaneously removing multiple metal ions in manganiferous waste water |
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| CN106587430B (en) * | 2016-12-19 | 2019-08-13 | 华中科技大学 | Processing method that is a kind of while removing various metals ion in Mn-bearing waste water |
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Application publication date: 20160113 |