CN105195494A - Pretreating agent for fluorine-containing solid waste slag and preparing and using method thereof - Google Patents
Pretreating agent for fluorine-containing solid waste slag and preparing and using method thereof Download PDFInfo
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- CN105195494A CN105195494A CN201510584766.3A CN201510584766A CN105195494A CN 105195494 A CN105195494 A CN 105195494A CN 201510584766 A CN201510584766 A CN 201510584766A CN 105195494 A CN105195494 A CN 105195494A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Abstract
The invention relates to a pretreating agent for fluorine-containing solid waste slag. The pretreating agent is prepared from, by weight, 10-50 parts of calcium compound and 5-10 parts of curing agent. The calcium compound is added into the fluorine-containing solid waste slag, and composition fluorine ions in the fluorine-containing solid waste slag and calcium ions added into the calcium compound are used for forming a calcium fluoride compound which is difficult to dissolve in water, so that the number of free fluorine ions in the fluorine-containing solid waste slag is greatly reduced, and the phenomenon that the content of the fluorine ions in the fluorine-containing solid waste slag is high in the prior art, and thus the fluorine ions can be dissolved in soil and underground water to cause pollution easily is avoided. The curing agent is added into the fluorine-containing solid waste slag, and thus the effect of bonding the fluorine-containing solid waste slag is achieved. Meanwhile, a layer of low-permeable matter is formed on the surface of the fluorine-containing solid waste slag, so that transfer of harmful components which mainly refer to the fluorine ions in the fluorine-containing solid waste slag is limited, and pollution of the soil and the underground water is avoided as well.
Description
Technical field
The invention belongs to solid waste preprocessing technical field, be specifically related to a kind of pretreating agent and preparation and application of fluorine-containing solid slag.
Background technology
In the industrial production, particularly metallurgical industry is produced and the production of all kinds of minings, while production various product, the various fluorine-containing solid/liquid danger wastes of inevitable generation, along with the requirement of country to environment protection emission is more and more higher, how various fluorine-containing solid/liquid danger wastes for these fluorinated volume severe overweights carries out environmental protection treatment, is the cardinal task of enterprise.
As in electrolytic aluminium factory production process, unavoidably to produce a large amount of solid slags, especially in the process of overhaul, the waste residues such as a large amount of fluorine-containing useless cathode and anode charcoal blocks can be produced.According to People's Republic of China's relevant criterion, electrolytic aluminium overhaul waste residue belongs to hazardous solid waste, in China, the mode of landfill is generally taked to process for above-mentioned fluorine-containing waste residue, as Chinese patent CN101612626A discloses a kind of processing method of electrolytic waste slag, it comprises the following steps: be 1, several waste pits (1) by the plan for land of slag field, be set to slope shape bottom waste pit, and arranges catch pit at hole end lowest part; 2, excavate waste pit, gradation is excavated, and only excavates a waste pit at every turn; 3, the waste pit excavated is carried out foundation anti-seepage process; 4, in waste pit, stack waste residue, after carrying out segmentation stacking waste residue, leveling compacting by direction from high to low, carry out Surface mulch process.Above-mentioned technology, by carrying out foundation anti-seepage process, stops that fluorine ion in waste residue spreads to the surrounding of soil, serves the effect of soil protection and underground water.But; fluorine-containing solid slag in above-mentioned technology directly carries out landfill; prevent fluorine ion in waste residue from entering soil and groundwater by utilizing the foundation anti-seepage process of waste pit; but; when the protective layer that ground Anti-seeping technology is formed is because of the earth's crust or what reason generation seepage, the fluorine ion in waste residue just loses protective barrier, directly will enter soil and groundwater; contaminated environment, and be difficult to repair.
In order to solve the problem, researcher begins one's study and above-mentioned solid slag is being carried out pretreatment, namely in landfill forward direction solid slag, add chelating agent, or in above-mentioned solid slag, add cement and carbon, reach after solid slag forms the material of hyposmosis on the surface, then bury.Although above-mentioned technology can reduce content of fluoride ion by the material forming hyposmosis on solid slag, but the content of fluoride ion being through above-mentioned pretreated solid slag can not meet the standard-required F<100mg/L in " hazardous waste judging standard-leaching characteristic identification " far away, the processed in units cost intensive of waste residue simultaneously.
Summary of the invention
For this reason, technical problem to be solved by this invention is that the fluorine-containing solid slag of prior art uses content of fluoride ion after pre-treatment treatment high and the problem of processed in units cost intensive before landfill, and then the pretreating agent proposing a kind of fluorine-containing solid slag and preparation method thereof and using method.
For solving the problems of the technologies described above, the invention provides a kind of pretreating agent of fluorine-containing solid slag, it comprises the component of following weight portion:
Calcium compound 10-50 part
Curing agent 0-10 part
Further, the zinc compound of 0.1-2.0 weight portion is also comprised.
Described zinc compound is one or several the mixing in zinc chloride, zinc hydroxide, zinc sulphide and zinc oxide.It should be noted that and be, in the present invention, described zinc compound is not only above-mentioned various pure powdered compounds, can also be the compound of various form, as bar-shaped zinc sulphide; Further, can also be the mineral containing above-mentioned zinc compound, as aphalerite; The present invention select above-mentioned various shape compound or containing the mineral of above-claimed cpd time, its grain size can be processed into and be less than the latter and equal 1mm.
Described calcium compound is one or several the mixing in calcium chloride, calcium hydroxide, calcium oxide, calcium carbonate, dihydrate gypsum and beta-type semi-hydrated gypsum.It should be noted that, described calcium compound of the present invention is not only above-mentioned various pure powdered compounds, can also be the compound of various shape, as the calcium carbonate of bulk; Further, can also be the mineral containing above-claimed cpd, as natural marble, quick lime and natural dihydrate gypsum etc., preferably, as calcium oxide is greater than or equal to quick lime, the CaSO of 95wt%
42H
2o is greater than or equal to the natural dihydrate gypsum etc. of 85wt%; The present invention select above-mentioned various shape compound or containing the mineral of above-claimed cpd time, its grain size can be processed into and be less than the latter and equal 1cm.
Described curing agent is sulphate aluminium cement, portland cement, fluoroaluminate cement, aluminate cement, ferrous aluminate cement, phosphate cement and with one or several the mixing in volcanic ash or latent hydraulicity material and other active materials cement that is key component.It should be noted that, described curing agent is not only above-mentioned various cement, can also be various quick-hardening cement, as quick hardening sulphoaluminate cement, lumnite cement.
Meanwhile, the invention also discloses the preparation method of described pretreating agent: by described calcium compound and described curing agent Homogeneous phase mixing, or by described calcium compound, described curing agent and described zinc compound Homogeneous phase mixing.
Meanwhile, the invention also discloses the using method of described pretreating agent: joined by described pretreating agent after mixing in fluorine-containing solid slag and carry out landfill or compacting landfill; By weight, the ratio of described pretreating agent and described fluorine-containing solid slag is 1:2-1:15.
Preferably, before described pretreating agent mixes with described fluorine-containing solid slag, first described fluorine-containing solid slag is broken for particle diameter and is less than or equal to 50mm.
Preferably, before compacting landfill, first interpolation water or steam soak, and the weight of described water or steam is the 1-15wt% of described fluorine-containing solid slag weight.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) pretreating agent of fluorine-containing solid slag of the present invention, it comprises the component of following weight portion: calcium compound 10-50 part and curing agent 0-10 part, by adding calcium compound in described fluorine-containing solid slag, utilize the composition fluorine ion in described fluorine-containing solid slag, the compound calcirm-fluoride being insoluble in water is formed with the calcium ion added in described calcium compound, fluorine ion free in described fluorine-containing solid slag is reduced in a large number, the content of fluoride ion avoided in fluorine-containing solid slag described in prior art is large, easily be dissolved in soil and groundwater being formed and pollute, by adding described curing agent in described fluorine-containing solid slag, serve the effect of the described fluorine-containing solid slag that bonds, simultaneously, form the transfer that one deck low permeability substance limits the mainly fluorine ion of harmful components in described fluorine-containing solid slag on the surface of described fluorine-containing solid slag, avoid the pollution of soil and groundwater equally, and then under the synergy of described calcium compound and described curing agent, the fluorine ion in described fluorine-containing solid slag reduces greatly, make fluorine ion fast and stable in described fluorine-containing solid slag in detection range, simultaneously, the parts by weight controlling described calcium compound and described curing agent are respectively 10-50 part and 0-10 part, make the concentration of fluorine ion in the described fluorine-containing solid slag after by pre-treatment treatment of the present invention at 10.1-99.9mg/L, lower than state specified standards.
(2) pretreating agent of fluorine-containing solid slag of the present invention, also comprise the zinc compound of 0.1-2.0 weight portion, by adding described zinc compound in described fluorine-containing solid slag, described zinc compound excites the activity of described fluorine-containing solid slag, simultaneously, accelerate fluorine ion and calcium ion further and form the compound calcirm-fluoride being insoluble in water, serve the effect of catalyst, again by adding the bonding of described curing agent between described fluorine-containing solid slag particle and/or block, form low permeability substance on the surface of described fluorine-containing solid slag simultaneously, through described calcium compound, the synergy of described zinc compound and described curing agent, make fluorine ion fast and stable in described fluorine-containing solid slag further in detection range, make the concentration of fluorine ion in the described fluorine-containing solid slag after by pre-treatment treatment of the present invention at 14.1-91.8mg/L, far below state specified standards.
(3) pretreating agent of fluorine-containing solid slag of the present invention, described zinc compound is one or several the mixing in zinc chloride, zinc hydroxide, zinc sulphide and zinc oxide; Described calcium compound is one or several the mixing in calcium chloride, calcium hydroxide, calcium oxide, calcium carbonate, dihydrate gypsum and beta-type semi-hydrated gypsum.By selecting described zinc compound and described calcium compound to be above-claimed cpd, best results, and unit costs is cheap.
(4) pretreating agent of fluorine-containing solid slag of the present invention, described zinc compound can also be the compound of various form, as bar-shaped zinc sulphide, further, can also be natural minerals, as aphalerite; Described calcium compound can also be block calcium carbonate, natural marble, quick lime and natural dihydrate gypsum etc.By selecting above-mentioned difform compound and mineral, as long as before use its pulverization process is become corresponding size, make method of disposal of the present invention simple, easy, and unit price is cheap.
(5) pretreating agent of fluorine-containing solid slag of the present invention, described curing agent is various types of cement, it can also be various quick-hardening cement, the lower material of solubility is formed in the firming body micropore that fluorine ion in described fluorine-containing solid slag and the calcium ion in the compound added are formed after cement solidification, calcirm-fluoride, fluorine ion free in described fluorine-containing solid slag is greatly reduced, meets the standard of landfill of national regulation.
(6) preparation method of the pretreating agent of fluorine-containing solid slag of the present invention, by described calcium compound and described curing agent Homogeneous phase mixing, or by described calcium compound, described curing agent and described zinc compound Homogeneous phase mixing, can find out, pretreating agent preparation of the present invention is simple, convenient and easy.
(7) using method of the pretreating agent of fluorine-containing solid slag of the present invention, directly joined by described pretreating agent in described fluorine-containing solid slag after mixing, landfill or compacting landfill, can find out, pretreating agent of the present invention is easy to use, convenient and easy; Further, by weight, the ratio of described pretreating agent and described fluorine-containing solid slag is 1:2-1:15, the proportioning effect of aforementioned proportion is best, make the concentration of the fluorine ion after described pre-treatment treatment in described fluorine-containing solid slag at 10.1-99.9mg/L, far below state specified standards.
(8) using method of the pretreating agent of fluorine-containing solid slag of the present invention, first described fluorine-containing solid slag is broken for particle diameter and is less than or equal to 50mm, by arranging this step, described fluorine-containing solid slag and described calcium compound, described zinc compound and described curing agent is made to be more prone to act synergistically, and reaction is more thorough, be more prone to form multilayer low permeability substance, greatly reduce free property fluorine ion; When landfill, the described fluorine-containing solid slag volume after compacting is little, and solidification is more solid, avoids free fluoride ion and enters soil and groundwater.
(9) using method of the pretreating agent of fluorine-containing solid slag of the present invention, before compacting landfill, first interpolation water or steam soak, like this, described fluorine-containing solid slag, described calcium compound, described zinc compound and described curing agent can carry out concerted reaction before landfill, namely before landfill, just greatly reduce the content of described free fluoride ion, avoid the convenience of follow-up certain operations process, and be more prone to compacting; Further control, the weight of described water or steam is the 1-15wt% of described fluorine-containing solid slag weight, the proportioning of aforementioned proportion makes easily to operate during fluorine-containing solid slag described in compacting landfill, avoid add water or steam is too much or the very few compacting caused loosely, cause the leakage of fluorine-containing solid slag as described in the operating process such as transport before landfill, cause environmental pollution.
Detailed description of the invention
Embodiment 1
(1) 10Kg calcium chloride and 8Kg sulphate aluminium cement are uniformly mixed, obtain pretreating agent A1;
(2) above-mentioned pretreating agent A1 being added in the fluorine-containing solid slag of 36Kg, through being uniformly mixed, forming mixture A1;
(3) mixture A1 in step (2) is carried out landfill.
Embodiment 2
(1) 20Kg calcium hydroxide and 5Kg fluoroaluminate cement are uniformly mixed, obtain pretreating agent A2;
(2) above-mentioned pretreating agent A2 being added in the fluorine-containing solid slag of 100Kg, through being uniformly mixed, forming mixture A2;
(3) mixture A2 in step (2) is placed in open-top receptacle, imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Embodiment 3
(1) 50Kg calcium oxide and 10Kg portland cement are uniformly mixed, obtain pretreating agent A3;
(2) above-mentioned pretreating agent A3 being added in the fluorine-containing solid slag of 360Kg, through being uniformly mixed, forming mixture A3;
(3) first spray the mixing of 3.6Kg water to mixture A3 in step (2), more above-mentioned homomixture is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Embodiment 4
(1) 30Kg calcium carbonate, 5Kg aluminate cement and 0.5Kg zinc chloride are uniformly mixed, obtain pretreating agent A4;
(2) above-mentioned pretreating agent A4 being added in the fluorine-containing solid slag of 284Kg, through being uniformly mixed, forming mixture A4;
(3) first spray the mixing of 8.52Kg water to mixture A4 in step (2), more above-mentioned homomixture is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Embodiment 5
(1) 40Kg dihydrate gypsum, 8Kg ferrous aluminate cement and 0.1Kg zinc hydroxide are uniformly mixed, obtain pretreating agent A5;
(2) above-mentioned pretreating agent A5 being added in the fluorine-containing solid slag of 481Kg, through being uniformly mixed, forming mixture A5;
(3) first spray the mixing of 24Kg steam to mixture A5 in step (2), more above-mentioned homomixture is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Embodiment 6
(1) 50Kg beta-type semi-hydrated gypsum, 10Kg phosphate cement and 1Kg zinc sulphide are uniformly mixed, obtain pretreating agent A6;
(2) first fluorine-containing solid slag being ground into the particle that particle diameter is 50mm and/or fritter, then, above-mentioned pretreating agent A6 being added in the fluorine-containing solid slag of 732Kg, through being uniformly mixed, forming mixture A6;
(3) first spray the mixing of 73.2Kg water to mixture A6 in step (2), then carry out landfill.
Embodiment 7
(1) be the calcium carbonate of 1cm by 10Kg grinding particle size, 5Kg quick hardening sulphoaluminate cement and 1.5Kg zinc oxide is uniformly mixed, and obtains pretreating agent A7;
(2) first fluorine-containing solid slag being ground into the particle that particle diameter is 35mm and/or fritter, then, above-mentioned pretreating agent A7 being added in the fluorine-containing solid slag of 247.5Kg, through being uniformly mixed, forming mixture A7;
(3) first spray the mixing of 29.7Kg water to mixture A7 in step (2), more above-mentioned homomixture is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Embodiment 8
(1) be 1mm by 30Kg grinding particle size, to be more than or equal to the quick lime of 9wt%, 8Kg lumnite cement and 2.0Kg grinding particle size be that the zinc sulphide of 1mm is uniformly mixed to calcium oxide, obtains pretreating agent A8;
(2) first fluorine-containing solid slag being ground into the particle that particle diameter is 5mm and/or fritter, then, above-mentioned pretreating agent A8 being added in the fluorine-containing solid slag of 240Kg, through being uniformly mixed, forming mixture A8;
(3) first spray the mixing of 36Kg water to mixture A8 in step (2), more above-mentioned homomixture is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Embodiment 9
(1) be 0.5mm, CaSO by 50Kg grinding particle size
42H
2it is that the zincblende of 0.1mm is uniformly mixed that O is greater than or equal to the natural dihydrate gypsum of 85wt%, the fast hard fluoroaluminate cement of 10Kg and 2.0Kg grinding particle size, obtains pretreating agent A9;
(2) first fluorine-containing solid slag being ground into the particle that particle diameter is 15mm and/or fritter, then, above-mentioned pretreating agent A9 being added in the fluorine-containing solid slag of 496Kg, through being uniformly mixed, forming mixture A9;
(3) first spray the mixing of 25Kg steam to mixture A9 in step (2), more above-mentioned homomixture is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Embodiment 10
(1) 50Kg calcium oxide, 10Kg lumnite cement and 1.5Kg zinc oxide are uniformly mixed, obtain pretreating agent A10;
(2) first fluorine-containing solid slag being ground into the particle that particle diameter is 25mm and/or fritter, then, above-mentioned pretreating agent A10 being added in the fluorine-containing solid slag of 665Kg, through being uniformly mixed, forming mixture A10;
(3) first spray the mixing of 46.5Kg steam to mixture A10 in step (2), more above-mentioned homomixture is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Embodiment 11
(1) 50Kg calcium chloride is joined in the fluorine-containing solid slag of 100Kg as pretreating agent A11 mix, form mixture A11;
(2) mixture A11 in step (1) is carried out landfill.
Embodiment 12
(1) zinc chloride of 30Kg calcium oxide and 0.5Kg is uniformly mixed, obtains pretreating agent A12;
(2) first fluorine-containing solid slag being ground into the particle that particle diameter is 25mm and/or fritter, then, above-mentioned pretreating agent A12 being joined in the fluorine-containing solid slag of 152.5Kg, through being uniformly mixed, forming mixture A12;
(3) first spray the mixing of 6.1Kg steam to mixture A12 in step (2), more above-mentioned homomixture is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Embodiment 13
(1) 50Kg calcium chloride and 0.1Kg sulphate aluminium cement are uniformly mixed, form pretreating agent A13;
(2) above-mentioned pretreating agent A13 being joined in the fluorine-containing solid slag of 200Kg, through being uniformly mixed, forming mixture A13;
(3) mixture A13 in step (2) is carried out landfill.
Embodiment 14
(1) zinc chloride of 30Kg calcium oxide, 0.5Kg and 2.5Kg lumnite cement are uniformly mixed, form pretreating agent A14;
(2) by joining in the fluorine-containing solid slag of 99Kg in above-mentioned pretreating agent A14, through being uniformly mixed, mixture A14 is formed;
(3) first spray the mixing of 2Kg steam to mixture A14 in step (2), more above-mentioned homomixture is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
It should be noted that, the mode mixed in above-described embodiment is not only confined to stir this kind of mode, can also be the mode of various mixed material in chemical industry; And the mode of carrying out compacting in above-described embodiment is not only confined to the mode of mechanical ramming, applying power simultaneously according to Selective Pressure real mode and waste residue amount number carry out practical adjustments.
Comparative example 1
(1) first fluorine-containing solid slag being ground into the particle that particle diameter is 50mm and/or fritter, is then chelating agent dilution by the dilution of chelating agent (FACAR, flies card, Suzhou Shi Purui environmental protection Co., Ltd produce) 2Kg 30L water;
(2) above-mentioned chelating agent dilution is joined in the above-mentioned fluorine-containing solid slag of 100Kg and fully stir 15 minutes, form mixture A15;
(3) mixture A15 in step (2) is carried out landfill.
Comparative example 2
(1) first fluorine-containing solid slag being ground into the particle that particle diameter is 50mm and/or fritter, is then chelating agent dilution by the dilution of chelating agent (FACAR, flies card, Suzhou Shi Purui environmental protection Co., Ltd produce) 2Kg 30L water;
(2) above-mentioned chelating agent dilution is joined in the above-mentioned fluorine-containing solid slag of 100Kg and fully stir 15 minutes, form mixture B16;
(3) thing B16 to be mixed left standstill after 1 hour, added 10Kg portland cement and mixed, and formed mixture A16;
(4) mixture A16 in step (3) carried out landfill or A16 be placed in open-top receptacle and apply 50KN pressure and carry out landfill after mechanical ramming.
Comparative example 3
(1) first fluorine-containing solid slag being ground into the particle that particle diameter is 50mm and/or fritter, then in the above-mentioned fluorine-containing solid slag of 100Kg, adding 10Kg portland cement, through being uniformly mixed, forming mixture B17;
(2) in said mixture B17, adding the 10Kg active carbon active carbon of 10 mesh sieve (90% be by aperture), through being uniformly mixed, forming mixture A17;
(3) first spray the mixing of 1Kg water to mixture A17 in step (2), then mixture A17 is placed in open-top receptacle and imposes 50KN pressure and carry out mechanical ramming, rear landfill.
Test case
Test fluorine ion contained in the mixture A15-A17 in the mixture A1-A14 obtained in fluorine-containing solid slag described in embodiment and comparative example, embodiment 1-14 and comparative example 1-3, method is as follows:
1, the collection of sample is carried out according to the relevant regulations of People's Republic of China (PRC) state environment protecting standard HJ557-2010 (replacing GB5086.2-1997) solid waste Leaching leaching method level concussion method;
2, fluorine ion analyzer (HC-800, Hang Chuan Medical Devices Co., Ltd of Shenzhen produces) is used to carry out Fluorine Ion Determination.
The concentration of the fluorine ion in the fluorine-containing solid slag obtained according to above-mentioned method of testing and mixture A1-A13 is in table 1.
Table 1
| Mixture | Fluorinion concentration (mg/L) |
| Fluorine-containing solid slag | 2640 |
| A1 | 10.1 |
| A2 | 29.5 |
| A3 | 99.9 |
| A4 | 48.5 |
| A5 | 50.2 |
| A6 | 78.3 |
| A7 | 68.7 |
| A8 | 69.1 |
| A9 | 86.6 |
| A10 | 91.8 |
| A11 | 48.8 |
| A12 | 48.5 |
| A13 | 79.8 |
| A14 | 14.1 |
| A15 | 100.1 |
| A16 | 88.5 |
| A17 | 211.1 |
As can be seen from Table 1, content of fluoride ion in fluorine-containing solid slag after pre-treatment treatment of the present invention is at 10.1-99.9mg/L, well below fluorine-containing solid slag fluorinion concentration after treatment described in comparative example 1 and comparative example 3, and well below the standard-required F<100mg/L in " hazardous waste judging standard-leaching characteristic identification ", can directly landfill or compacting landfill, excellent.
Simultaneously, 150 yuan/ton are less than by the processing cost of the inventive method, and the processing cost of comparative example and the fluorine-containing solid slag of prior art process is all greater than 500 yuan/ton, can find out, the cost of the fluorine-containing solid slag of the inventive method process is well below the cost of the fluorine-containing solid slag of prior art process, and respond well, be applicable to very much applying; Further, pretreating agent using method of the present invention is simple to operate, is more applicable to applying.
What deserves to be explained is, the present invention is not only applicable to the fluorine-containing waste residue of electrolytic aluminium factory, is also applicable to any fluorine-containing solid slag or danger wastes; And for described calcium compound used in the present invention, described zinc compound, during purchase, if graininess or powdery, directly use, if block or bar-shaped or other are irregularly shaped, then need to be ground into corresponding size and re-use.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still in the protection domain of the invention.
Claims (10)
1. a pretreating agent for fluorine-containing solid slag, is characterized in that, comprises the component of following parts by weight:
Calcium compound 10-50 part
Curing agent 0-10 part.
2. pretreating agent according to claim 1, is characterized in that, also comprises the zinc compound of 0.1-2.0 weight portion.
3. pretreating agent according to claim 2, is characterized in that, described zinc compound is one or several the mixing in zinc chloride, zinc hydroxide, zinc sulphide and zinc oxide.
4. pretreating agent according to claim 3, is characterized in that, described calcium compound is one or several the mixing in calcium chloride, calcium hydroxide, calcium oxide, calcium carbonate, dihydrate gypsum and beta-type semi-hydrated gypsum.
5., according to the arbitrary described pretreating agent of claim 2-4, it is characterized in that, the grain size of described calcium compound is less than or equal to 1cm; The grain size of described zinc compound is less than or equal to 1mm.
6. pretreating agent according to claim 4, it is characterized in that, described curing agent is sulphate aluminium cement, portland cement, fluoroaluminate cement, aluminate cement, ferrous aluminate cement, phosphate cement and with one or several the mixing in volcanic ash or latent hydraulicity material and other active materials cement that is key component.
7. right will go a preparation method for the arbitrary described pretreating agent of 1-6, it is characterized in that, by described calcium compound and described curing agent Homogeneous phase mixing, or by described calcium compound, described curing agent and described zinc compound Homogeneous phase mixing.
8. right will go a using method for the arbitrary described pretreating agent of 1-6, it is characterized in that, is joined by described pretreating agent after mixing in fluorine-containing solid slag and carries out landfill or compacting landfill; By weight, the ratio of described pretreating agent and described fluorine-containing solid slag is 1:2-1:15.
9. arbitrary described using method according to Claim 8, is characterized in that, before described pretreating agent mixes with described fluorine-containing solid slag, first described fluorine-containing solid slag is broken for particle diameter and is less than or equal to 50mm.
10. using method according to claim 8 or claim 9, is characterized in that, before compacting landfill, first add water or steam soaks, the weight of described water or steam is the 1-15wt% of described fluorine-containing solid slag weight.
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| CN113321226A (en) * | 2021-06-30 | 2021-08-31 | 攀钢集团研究院有限公司 | Method for removing fluorine in ionic membrane caustic soda by using brine prepared from chlorination residues |
| CN113369289A (en) * | 2021-07-28 | 2021-09-10 | 嘉应学院 | Treatment method for dangerous solid waste containing fluorine silicate |
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| CN113321226A (en) * | 2021-06-30 | 2021-08-31 | 攀钢集团研究院有限公司 | Method for removing fluorine in ionic membrane caustic soda by using brine prepared from chlorination residues |
| CN113369289A (en) * | 2021-07-28 | 2021-09-10 | 嘉应学院 | Treatment method for dangerous solid waste containing fluorine silicate |
| CN113369289B (en) * | 2021-07-28 | 2023-10-17 | 嘉应学院 | Treatment method for dangerous solid waste of fluorosilicate |
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