CN105600895A - Method using gangue to process slime water - Google Patents
Method using gangue to process slime water Download PDFInfo
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- CN105600895A CN105600895A CN201511024189.9A CN201511024189A CN105600895A CN 105600895 A CN105600895 A CN 105600895A CN 201511024189 A CN201511024189 A CN 201511024189A CN 105600895 A CN105600895 A CN 105600895A
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- water
- gangue
- black water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/009—Compounds containing, besides iron, two or more other elements, with the exception of oxygen or hydrogen
Abstract
The invention provides a method using gangue to process slime water, which comprises following steps: 1, crushing and screening gangue, then uniformly mixing with sodium carbonate powder, and then performing activating processing to obtain an activated material; 2, filtering after water dissolving, obtaining an activated material subjected to water dissolving; 3, mixing with magnetite powder and hydrochloric acid and then performing acidification reaction to obtain an AlCl3-FeCl3 mixed solution; 4, adjusting a pH value of the AlCl3-FeCl3 mixed solution, after polymerizing, obtaining a polyaluminum ferric chloride solution; 5, stirring the polyaluminum ferric chloride solution with slime water, standing, and taking supernate to obtain the processed slime water. The gangue is used for preparing a polyaluminum ferric chloride flocculant and processing the slime water, thereby realizing the clean production and comprehensive use of a coal resource and solving the hazard to the environment caused by the gangue; materials are taken locally and the problem of hard treatment of the high argillization slime water of a coal preparation plant is solved.
Description
Technical field
The invention belongs to technical field of coal chemical industry, be specifically related to a kind of gangue that utilizes and process black waterMethod.
Background technology
China has abundant coal resources, is a consumption of coal big country, is also coal production simultaneouslyBig country, still, because the traditional bargh's development model of China is to rely on a large amount of mineral resources of excavatingDevelop the economy, produced the waste materials such as a large amount of barren rocks, waste water and waste gas in mining, it is right to have ignoredThe protection of the environment that the mankind depend on for existence, when resource is constantly consumed, ecological environment also meets withArrive great destruction. Therefore, how to make rational use of resources, reduce the discharge of waste material, protection is ecologicalEnvironment, carrying out cleaner production has become most important content and the means of Mining Sustainable Development.
Along with the continuous increase of China to coal demand, in coal mining and process, produce largeAmount gangue, and along with China is to the carrying forward vigorously of the Coal Clean mode of production, the washing of coal from now onRatio will increase gradually, and corresponding gangue discharge rate also can be more and more higher. A large amount of spoil discharges, noOnly take many ground, also caused the deterioration of environment simultaneously. Spoil addressing or mismanagement are often drawnPlay dust from flying. Some Gangue is placed on two sides, river or river shoal, seriously stops up the flood carrying capacity in river course,People often can see that hillock is because heavy rain, flood wash away the serious accident that causes mud-rock-flow-impact,Not only can cause larger destruction to environment, and cause very large loss to the people's lives and property.
In view of increasing gradually coal production, improve the quality of coal, must reach again Filter Tuber For Clean Coal simultaneouslyRequired standard, some problems that comprehensive above-mentioned China produces in coal production process, this patent is originallyTo discarded gangue is carried out recycling, turns waste into wealth, realizes mining area resource circulation utilizationPrinciple, utilizes gangue for raw material, constituent experiment Analysis to it, uses direct invasionTechnique, produces high-performance flocculant poly aluminium chloride ferrum, and it is applied to mining area self coal separation systemDuring the black water of system is processed. Cleaner production and the comprehensive utilization of coal resources are so not only realized, alsoSolve to a great extent the harm that gangue brings environment in coal production process, be also simultaneouslyGather materials on the spot, solved the unmanageable problem of the high argillization black water of coal preparation plant. By this to discardedGangue carries out the mode of resource recycling utilization in enterprises, not only protected ecological environment,But also made economic benefit, social benefit to enterprise, make Coal Resource Development and mining area development trueJust moving towards the road of the health of sustainable development.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, provides a kind ofUtilize gangue to process the method for black water. It is raw material that the method adopts gangue, by addingNa2CO3Activation and extraction Al in Muffle furnace2O3, adopt two step leachings to deviate from sodium metasilicate, then salt addingAcid and Iron Ore Powder make aluminium iron polychloride floculant through acidifying, polymerization, and made flocculant has aluminium salt concurrentlyThe feature of class and iron saline flocculating agent shows good performance in the coagulating sedimentation of water is processed. ShouldMethod for the preparation of aluminium iron polychloride floculant, and is used it for processing black water by gangue, noOnly realize cleaner production and the comprehensive utilization of coal resources, also solved to a great extent at coal rawThe harm that in product process, gangue brings environment is also gathered materials on the spot simultaneously, has solved coal preparation plant highThe unmanageable problem of argillization black water.
For solving the problems of the technologies described above, the technical solution used in the present invention is: one is utilized gangue placeThe method of reason black water, is characterized in that, the method comprises the following steps:
Step 1, sieve after pulverizing coal gangue, obtain colliery powder, then by sodium carbonate with described inColliery powder in mass ratio 1: (2～4) mix, and obtain mixture, afterwards described mixture are putIn Muffle furnace, be under the condition of 600 DEG C～800 DEG C, to be incubated 1h～2h to carry out activation processing in temperature,Obtain activating material;
Step 2, employing distilled water carry out water-soluble processing, then mistake to activating material described in step 1Leaching solid trapped substance, obtains water-soluble activation material after treatment; The volume of described distilled water is activation10～30 times of volume of material; The temperature of described water-soluble processing is 40 DEG C～60 DEG C, described water-soluble processingTime be 20min～40min;
Step 3, by water-soluble activation material after treatment and magnetite powder and hydrochloric acid described in step 2Then Al in molar ratio: Fe: HCl=1: 1: (3～8) mix is 100 DEG C～120 in temperatureDEG C condition under acidification reaction 1h～3h, cross leaching filtrate, obtain AlCl3-FeCl3Mixed solution;
Step 4, employing calcium carbonate are by AlCl described in step 33-FeCl3The pH value of mixed solution is adjustedJoint is 2～4, then by the AlCl regulating after pH value3-FeCl3Mixed solution is 50 DEG C～70 in temperatureDEG C condition under polymerisation 1h～3h, obtain aluminium polychloride ferrous solution;
Step 5, by the ferrous solution of aluminium polychloride described in step 4 and black water by volume(0.05～0.1): after 1 stirring 20min～50min, leave standstill, get supernatant, obtain black water after treatment.
A kind of above-mentioned method of utilizing gangue to process black water, is characterized in that institute in step 1The particle diameter of stating colliery powder is not more than 74 μ m.
A kind of above-mentioned method of utilizing gangue to process black water, is characterized in that institute in step 3The mass percent concentration of stating hydrochloric acid is 15%～25%.
A kind of above-mentioned method of utilizing gangue to process black water, is characterized in that institute in step 5The rotating speed of stating stirring is 50r/min～300r/min.
A kind of above-mentioned method of utilizing gangue to process black water, is characterized in that institute in step 5The concentration of stating coal slime in black water is 10g/L～50g/L.
A kind of above-mentioned method of utilizing gangue to process black water, is characterized in that institute in step 5Stating the standing time is 5min～30min.
The present invention compared with prior art has the following advantages:
1, the invention discloses a kind of gangue that utilizes and prepare flocculant the side for black water processingMethod. This flocculant adopts gangue to add Na2CO3At high temperature activation and extraction Al2O3, adopt two stepsThe leaching stripping sodium metasilicate that adds water, adds the rear acidifying such as hydrochloric acid, magnetite powder, is polymerized. ThisBright employing gangue is prepared flocculant, and uses it for black water processing, can improve its additional utilizationValue and minimizing environmental pollution, realize cleaner production and the comprehensive utilization of coal resources.
The flocculating effect of the flocculant that 2, prepared by the present invention is good, and the black water of processing reaches purificationObject, and significantly improved the comprehensive utilization ratio of gangue.
3, gangue is added Na by the present invention2CO3Activation and extraction Al under hot conditions2O3, adoptTwo step leaching stripping sodium metasilicate, then add hydrochloric acid and magnetic iron powder polymerization to make PAFC waddingSolidifying agent, made flocculant has the feature of aluminium salt and iron saline flocculating agent concurrently, at the coagulating sedimentation place of waterIn reason, show good performance.
4, the present invention has reduced the cost of flocculant greatly. The activated stripping Al of gangue2O3, canDirectly replace industrial chemicals, its cost is only prepared 1/2～3/4 of flocculant for pure industrial chemicals, hasVery strong commercial competitiveness, will promote the fast development of China's flocculant industry energetically.
5, due to the existence of a large amount of fines, black water is dealt with more and more difficult. ThisInvention, by adding the aluminium iron polychloride floculant being made by gangue, makes the suspension in black waterMethod with the form sedimentation separation of larger particles or loose floc sedimentation is handed over coagulating treatment, makes the black water degree of depthClarification.
6, the present invention has not only realized cleaner production and the comprehensive utilization of coal resources, also largelyOn solved the harm that gangue brings environment in coal production process, be simultaneously also to get on the spotMaterial, has solved the unmanageable problem of the high argillization black water of coal preparation plant.
Below in conjunction with embodiment, the present invention is described in further detail.
Detailed description of the invention
Embodiment 1
The present embodiment utilizes gangue to prepare PAFC, then utilizes PAFC pairBlack water is processed. The method that the present embodiment utilizes gangue to process black water comprises the following steps:
Step 1, sieve after pulverizing coal gangue, obtain the colliery powder that particle diameter is not more than 74 μ m,Then sodium carbonate is mixed in mass ratio with described colliery powder at 1: 2.5, obtain mixture, itAfter described mixture is placed in to Muffle furnace, be under the condition of 800 DEG C, to be incubated 1.5h to live in temperatureChange and process, obtain activating material;
Step 2, employing distilled water carry out water-soluble processing, then mistake to activating material described in step 1Leaching solid trapped substance, obtains water-soluble activation material after treatment; The volume of described distilled water is activation20 times of volume of material; The temperature of described water-soluble processing is 50 DEG C, and the time of described water-soluble processing is30min；
Step 3, by water-soluble activation material after treatment and magnetite powder and quality described in step 2Percent concentration is 20% hydrochloric acid Al in molar ratio: Fe: HCl=1: mix at 1: 5, thenBe acidification reaction 3h under the condition of 110 DEG C in temperature, cross leaching filtrate, obtain AlCl3-FeCl3MixSolution;
Step 4, employing calcium carbonate are by AlCl described in step 33-FeCl3The pH value of mixed solution is adjustedJoint is 3, then by the AlCl regulating after pH value3-FeCl3Mixed solution is the condition of 60 DEG C in temperatureLower polymerisation 3h, obtains aluminium polychloride ferrous solution;
Step 5, by coal slime and distilled water preparation black water, in black water, the concentration of coal slime is 30g/L,Then by the ferrous solution of aluminium polychloride described in step 4 and black water 0.06: 1 by volume at rotating speedUnder condition for 250r/min, stir 30min, leave standstill afterwards 20min, get supernatant, processedAfter black water.
After testing, the light transmittance of the present embodiment black water after treatment is 96.2%. Hence one can see that, thisEmbodiment utilizes gangue to prepare flocculant and for black water processing, treatment effect is good.
Embodiment 2
The present embodiment utilizes gangue to prepare PAFC, then utilizes PAFC pairBlack water is processed. The method that the present embodiment utilizes gangue to process black water comprises the following steps:
Step 1, sieve after pulverizing coal gangue, obtain the colliery powder that particle diameter is not more than 74 μ m,Then sodium carbonate is mixed in mass ratio with described colliery powder at 1: 2.8, obtain mixture, itAfter described mixture is placed in to Muffle furnace, be under the condition of 800 DEG C, to be incubated 2h to activate in temperatureProcess, obtain activating material;
Step 2, employing distilled water carry out water-soluble processing, then mistake to activating material described in step 1Leaching solid trapped substance, obtains water-soluble activation material after treatment; The volume of described distilled water is activation30 times of volume of material; The temperature of described water-soluble processing is 40 DEG C, and the time of described water-soluble processing is40min；
Step 3, by water-soluble activation material after treatment and magnetite powder and quality described in step 2Percent concentration is 25% hydrochloric acid Al in molar ratio: Fe: HCl=1: mix at 1: 6, thenBe acidification reaction 3h under the condition of 100 DEG C in temperature, cross leaching filtrate, obtain AlCl3-FeCl3MixSolution;
Step 4, employing calcium carbonate are by AlCl described in step 33-FeCl3The pH value of mixed solution is adjustedJoint is 4, then by the AlCl regulating after pH value3-FeCl3Mixed solution is the condition of 50 DEG C in temperatureLower polymerisation 2h, obtains aluminium polychloride ferrous solution;
Step 5, by coal slime and distilled water preparation black water, in black water, the concentration of coal slime is 20g/L,Then by the ferrous solution of aluminium polychloride described in step 4 and black water 0.1: 1 by volume at rotating speedUnder condition for 200r/min, stir 30min, leave standstill afterwards 10min, get supernatant, processedAfter black water.
After testing, the light transmittance of the present embodiment black water after treatment is 90.0%. Hence one can see that, thisEmbodiment utilizes gangue to prepare flocculant and for black water processing, treatment effect is good.
Embodiment 3
The present embodiment utilizes gangue to prepare PAFC, then utilizes PAFC pairBlack water is processed. The method that the present embodiment utilizes gangue to process black water comprises the following steps:
Step 1, sieve after pulverizing coal gangue, obtain the colliery powder that particle diameter is not more than 74 μ m,Then sodium carbonate is mixed in mass ratio with described colliery powder at 1: 4, obtain mixture, itAfter described mixture is placed in to Muffle furnace, be under the condition of 800 DEG C, to be incubated 2h to activate in temperatureProcess, obtain activating material;
Step 2, employing distilled water carry out water-soluble processing, then mistake to activating material described in step 1Leaching solid trapped substance, obtains water-soluble activation material after treatment; The volume of described distilled water is activation30 times of volume of material; The temperature of described water-soluble processing is 60 DEG C, and the time of described water-soluble processing is20min；
Step 3, by water-soluble activation material after treatment and magnetite powder and quality described in step 2Percent concentration is 15% hydrochloric acid Al in molar ratio: Fe: HCl=1: mix at 1: 8, thenBe acidification reaction 1h under the condition of 120 DEG C in temperature, cross leaching filtrate, obtain AlCl3-FeCl3MixSolution;
Step 4, employing calcium carbonate are by AlCl described in step 33-FeCl3The pH value of mixed solution is adjustedJoint is 4, then by the AlCl regulating after pH value3-FeCl3Mixed solution is the condition of 50 DEG C in temperatureLower polymerisation 3h, obtains aluminium polychloride ferrous solution;
Step 5, by coal slime and distilled water preparation black water, in black water, the concentration of coal slime is 50g/L,Then by the ferrous solution of aluminium polychloride described in step 4 and black water 0.05: 1 by volume at rotating speedUnder condition for 50r/min, stir 20min, leave standstill afterwards 30min, get supernatant, after obtaining processingBlack water.
After testing, the light transmittance of the present embodiment black water after treatment is 96.2%. Hence one can see that, thisEmbodiment utilizes gangue to prepare flocculant and for black water processing, treatment effect is good.
Embodiment 4
The present embodiment utilizes gangue to prepare PAFC, then utilizes PAFC pairBlack water is processed. The method that the present embodiment utilizes gangue to process black water comprises the following steps:
Step 1, sieve after pulverizing coal gangue, obtain the colliery powder that particle diameter is not more than 74 μ m,Then sodium carbonate is mixed in mass ratio with described colliery powder at 1: 3, obtain mixture, itAfter described mixture is placed in to Muffle furnace, be under the condition of 800 DEG C, to be incubated 1h to activate in temperatureProcess, obtain activating material;
Step 2, employing distilled water carry out water-soluble processing, then mistake to activating material described in step 1Leaching solid trapped substance, obtains water-soluble activation material after treatment; The volume of described distilled water is activation30 times of volume of material; The temperature of described water-soluble processing is 60 DEG C, and the time of described water-soluble processing is40min；
Step 3, by water-soluble activation material after treatment and magnetite powder and quality described in step 2Percent concentration is 15% hydrochloric acid Al in molar ratio: Fe: HCl=1: mix at 1: 3, thenBe acidification reaction 3h under the condition of 100 DEG C in temperature, cross leaching filtrate, obtain AlCl3-FeCl3MixSolution;
Step 4, employing calcium carbonate are by AlCl described in step 33-FeCl3The pH value of mixed solution is adjustedJoint is 4, then by the AlCl regulating after pH value3-FeCl3Mixed solution is the condition of 70 DEG C in temperatureLower polymerisation 2h, obtains aluminium polychloride ferrous solution;
Step 5, by coal slime and distilled water preparation black water, in black water, the concentration of coal slime is 50g/L,Then by the ferrous solution of aluminium polychloride described in step 4 and black water 0.05: 1 by volume at rotating speedUnder condition for 50r/min, stir 50min, leave standstill afterwards 30min, get supernatant, after obtaining processingBlack water.
After testing, the light transmittance of the present embodiment black water after treatment is 91.8%. Hence one can see that, thisEmbodiment utilizes gangue to prepare flocculant and for black water processing, treatment effect is good.
Embodiment 5
The present embodiment utilizes gangue to prepare PAFC, then utilizes PAFC pairBlack water is processed. The method that the present embodiment utilizes gangue to process black water comprises the following steps:
Step 1, sieve after pulverizing coal gangue, obtain the colliery powder that particle diameter is not more than 74 μ m,Then sodium carbonate is mixed in mass ratio with described colliery powder at 1: 2, obtain mixture, itAfter described mixture is placed in to Muffle furnace, be under the condition of 600 DEG C, to be incubated 1h to activate in temperatureProcess, obtain activating material;
Step 2, employing distilled water carry out water-soluble processing, then mistake to activating material described in step 1Leaching solid trapped substance, obtains water-soluble activation material after treatment; The volume of described distilled water is activation10 times of volume of material; The temperature of described water-soluble processing is 40 DEG C, and the time of described water-soluble processing is20min；
Step 3, by water-soluble activation material after treatment and magnetite powder and quality described in step 2Percent concentration is 25% hydrochloric acid Al in molar ratio: Fe: HCl=1: mix at 1: 8, thenBe acidification reaction 1h under the condition of 120 DEG C in temperature, cross leaching filtrate, obtain AlCl3-FeCl3MixSolution;
Step 4, employing calcium carbonate are by AlCl described in step 33-FeCl3The pH value of mixed solution is adjustedJoint is 2, then by the AlCl regulating after pH value3-FeCl3Mixed solution is the condition of 50 DEG C in temperatureLower polymerisation 2h, obtains aluminium polychloride ferrous solution;
Step 5, by coal slime and distilled water preparation black water, in black water, the concentration of coal slime is 50g/L,Then by the ferrous solution of aluminium polychloride described in step 4 and black water 0.1: 1 by volume at rotating speedUnder condition for 300r/min, stir 20min, leave standstill afterwards 5min, get supernatant, after obtaining processingBlack water.
After testing, the light transmittance of the present embodiment black water after treatment is 87.6%. Hence one can see that, thisEmbodiment utilizes gangue to prepare flocculant and for black water processing, treatment effect is good.
Embodiment 6
The present embodiment utilizes gangue to prepare PAFC, then utilizes PAFC pairBlack water is processed. The method that the present embodiment utilizes gangue to process black water comprises the following steps:
Step 1, sieve after pulverizing coal gangue, obtain the colliery powder that particle diameter is not more than 74 μ m,Then sodium carbonate is mixed in mass ratio with described colliery powder at 1: 3, obtain mixture, itAfter described mixture is placed in to Muffle furnace, be under the condition of 700 DEG C, to be incubated 1h to activate in temperatureProcess, obtain activating material;
Step 2, employing distilled water carry out water-soluble processing, then mistake to activating material described in step 1Leaching solid trapped substance, obtains water-soluble activation material after treatment; The volume of described distilled water is activation20 times of volume of material; The temperature of described water-soluble processing is 50 DEG C, and the time of described water-soluble processing is25min；
Step 3, by water-soluble activation material after treatment and magnetite powder and quality described in step 2Percent concentration is 15% hydrochloric acid Al in molar ratio: Fe: HCl=1: mix at 1: 4, thenBe acidification reaction 1h under the condition of 110 DEG C in temperature, cross leaching filtrate, obtain AlCl3-FeCl3MixSolution;
Step 4, employing calcium carbonate are by AlCl described in step 33-FeCl3The pH value of mixed solution is adjustedJoint is 3, then by the AlCl regulating after pH value3-FeCl3Mixed solution is the condition of 60 DEG C in temperatureLower polymerisation 1h, obtains aluminium polychloride ferrous solution;
Step 5, by coal slime and distilled water preparation black water, in black water, the concentration of coal slime is 20g/L,Then by the ferrous solution of aluminium polychloride described in step 4 and black water 0.08: 1 by volume at rotating speedUnder condition for 80r/min, stir 30min, leave standstill afterwards 10min, get supernatant, after obtaining processingBlack water.
After testing, the light transmittance of the present embodiment black water after treatment is 89.6%. Hence one can see that, thisEmbodiment utilizes gangue to prepare flocculant and for black water processing, treatment effect is good.
Comparative example 1
This comparative example is only with the difference of embodiment 1: in step 1, do not add sodium carbonate.
After testing, the light transmittance of the present embodiment black water after treatment is 71.3%. Hence one can see that, thisComparative example utilizes gangue to prepare flocculant and for black water processing, poor processing effect.
Comparative example 2
This comparative example is only with the difference of embodiment 1: in step 1, do not add sodium carbonate,And do not carry out the water-soluble processing of step 2.
After testing, the light transmittance of the present embodiment black water after treatment is 68.2%. Hence one can see that, thisComparative example utilizes gangue to prepare flocculant and for black water processing, poor processing effect.
Known by embodiment 1 and comparative example 1-2 are analyzed, the present invention adopts gangueFor raw material, by adding a certain amount of Na2CO3Rear high-temperature activation, better stripping Al2O3，And, by adopting water soluble method stripping sodium metasilicate, the silicon in gangue is removed, avoid follow-up waddingSilicon interference problem in solidifying processing procedure.
In the present invention, aluminium iron polychloride floculant preparation process and influence factor mainly contain fourIndividual, respectively: activation temperature, concentration of hydrochloric acid, polymerization reaction time, adopt orthogonal experiment to carry out realityTest research, orthogonal test method is that the one test of being used widely in the every field of producing is establishedMeter method. It is to use a set of normalized " orthogonal table " to arrange and analyze the one of multifactorial experimentMathematical statistics method, discharges most representative test number (TN), and can from the minority test of only doing, fillDivide and obtain information needed. This orthogonal experiment is chosen three level three factors, and three factors are followed successively by; A (livesChange temperature), B (concentration of hydrochloric acid), C (polymerization reaction time) data selection record also as following table 1Analyze experimental result.
Table 1 orthogonal design table
Prepare the technological process of aluminium iron polychloride floculant carries out in Orthogonal Experiment and Design by gangueEach experiment, experimental results is recorded in table 2.
Table 2 Orthogonal experiment results
Adopt the method for range analysis to analyze, analysis result is in table 3.
Table 3 range analysis
As seen from table, RA > RB > RC, to what prepare that flocculant poly aluminium chloride ferrum has the greatest impact isActivating coal gangue temperature, is followed successively by concentration of hydrochloric acid, reaction time, in A factor, due to III > II> I, therefore, reaction temperature is best in the time of 800 DEG C, same method can analyze, hydrochloric acidConcentration 20%, polymerization reaction time is while being 3h, final product flocculating effect is best. ComprehensiveThe best collocation that goes out each factor is: A3B2C3.
In sum, the present invention by gangue for the preparation of aluminium iron polychloride floculant and for the treatment ofBlack water, has not only realized cleaner production and the comprehensive utilization of coal resources, also solves to a great extentGangue harm that environment is brought, gather materials on the spot, solved coal preparation plant's high argillization black water difficultyThe problem of reason.
The above, be only preferred embodiment of the present invention, not the present invention imposed any restrictions. AllThat any simple modification, change and the equivalence of above embodiment being done according to invention technical spirit becomesChange, all still belong in the protection domain of technical solution of the present invention.
Claims (6)
1. utilize gangue to process the method for black water, it is characterized in that, the method comprise withLower step:
Step 1, sieve after pulverizing coal gangue, obtain colliery powder, then by sodium carbonate with described inColliery powder in mass ratio 1: (2～4) mix, and obtain mixture, afterwards described mixture are putIn Muffle furnace, be under the condition of 600 DEG C～800 DEG C, to be incubated 1h～2h to carry out activation processing in temperature,Obtain activating material;
Step 2, employing distilled water carry out water-soluble processing, then mistake to activating material described in step 1Leaching solid trapped substance, obtains water-soluble activation material after treatment; The volume of described distilled water is activation10～30 times of volume of material; The temperature of described water-soluble processing is 40 DEG C～60 DEG C, described water-soluble processingTime be 20min～40min;
Step 3, by water-soluble activation material after treatment and magnetite powder and hydrochloric acid described in step 2Then Al in molar ratio: Fe: HCl=1: 1: (3～8) mix is 100 DEG C～120 in temperatureDEG C condition under acidification reaction 1h～3h, cross leaching filtrate, obtain AlCl3-FeCl3Mixed solution;
Step 4, employing calcium carbonate are by AlCl described in step 33-FeCl3The pH value of mixed solution is adjustedJoint is 2～4, then by the AlCl regulating after pH value3-FeCl3Mixed solution is 50 DEG C～70 in temperatureDEG C condition under polymerisation 1h～3h, obtain aluminium polychloride ferrous solution;
Step 5, by the ferrous solution of aluminium polychloride described in step 4 and black water by volume(0.05～0.1): after 1 stirring 20min～50min, leave standstill, get supernatant, obtain black water after treatment.
2. a kind of method of utilizing gangue to process black water according to claim 1, its spyLevy and be, the particle diameter of colliery powder described in step 1 is not more than 74 μ m.
3. a kind of method of utilizing gangue to process black water according to claim 1, its spyLevy and be, the mass percent concentration of hydrochloric acid described in step 3 is 15%～25%.
4. a kind of method of utilizing gangue to process black water according to claim 1, its spyLevy and be, the rotating speed stirring described in step 5 is 50r/min～300r/min.
5. a kind of method of utilizing gangue to process black water according to claim 1, its spyLevy and be, described in step 5, in black water, the concentration of coal slime is 10g/L～50g/L.
6. a kind of method of utilizing gangue to process black water according to claim 1, its spyLevy and be, the standing time described in step 5 is 5min～30min.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106830240A (en) * | 2017-01-10 | 2017-06-13 | 太原理工大学 | A kind of method of utilization bastard coal ground mass flocculant process black water |
| CN109603743A (en) * | 2019-01-10 | 2019-04-12 | 辽宁大学 | A kind of preparation method and application of Preparation & Application of Modified Gangue Absorbent |
| CN110104668A (en) * | 2019-05-30 | 2019-08-09 | 南华大学 | A kind of preparation method of polyaluminium chloride water purification agent |
| CN112158933A (en) * | 2020-10-19 | 2021-01-01 | 西安工程大学 | Polyaluminum ferric chloride flocculant and preparation method thereof |
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2015
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| US4519915A (en) * | 1983-08-05 | 1985-05-28 | Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Energy, Mines And Resources | Clarification of black water produced during recovery of bitumens and heavy oils |
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| CN101948142A (en) * | 2010-10-09 | 2011-01-19 | 天津泰达环保有限公司 | Method for producing sludge modifier by utilizing coal gangue |
| CN102515279A (en) * | 2011-12-12 | 2012-06-27 | 昆明理工大学 | Comprehensive extraction method of ferro-silico-aluminum in gangue |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106830240A (en) * | 2017-01-10 | 2017-06-13 | 太原理工大学 | A kind of method of utilization bastard coal ground mass flocculant process black water |
| CN109603743A (en) * | 2019-01-10 | 2019-04-12 | 辽宁大学 | A kind of preparation method and application of Preparation & Application of Modified Gangue Absorbent |
| CN110104668A (en) * | 2019-05-30 | 2019-08-09 | 南华大学 | A kind of preparation method of polyaluminium chloride water purification agent |
| CN112158933A (en) * | 2020-10-19 | 2021-01-01 | 西安工程大学 | Polyaluminum ferric chloride flocculant and preparation method thereof |
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|---|---|
| CN105600895B (en) | 2018-05-04 |
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