CN105772490A - Method for treating tailings residual acid at low cost during hydrofluoric acid production - Google Patents
Method for treating tailings residual acid at low cost during hydrofluoric acid production Download PDFInfo
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- CN105772490A CN105772490A CN201610292117.0A CN201610292117A CN105772490A CN 105772490 A CN105772490 A CN 105772490A CN 201610292117 A CN201610292117 A CN 201610292117A CN 105772490 A CN105772490 A CN 105772490A
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- China
- Prior art keywords
- tailings
- gas
- making
- residual acid
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002253 acid Substances 0.000 title claims abstract description 59
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000000292 calcium oxide Substances 0.000 claims abstract description 44
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 44
- 239000000428 dust Substances 0.000 claims abstract description 40
- 239000003245 coal Substances 0.000 claims abstract description 24
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002893 slag Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 14
- 239000003337 fertilizer Substances 0.000 abstract description 12
- 229910021529 ammonia Inorganic materials 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 11
- 239000003034 coal gas Substances 0.000 description 9
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 7
- 238000010306 acid treatment Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000006386 neutralization reaction Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 2
- 239000003830 anthracite Substances 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- -1 slaked lime) Chemical compound 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The invention relates to a method for treating tailings residual acid at low cost during hydrofluoric acid production. Dust generated by combustion and making-gas of a gas-making type coal containing quick lime is mixed with tailings, so that calcium oxide in the dust neutralizes with the excessive amount of the residual acid in the tailings to remove the residual acid in the tailings. The dust generated through gas making of the gas-making type coal containing quick lime is mixed with the tailings to neutralize the residual acid in the tailings, the cost of raw materials and equipment for treating the tailings residual acid is greatly reduced, the treatment efficiency of the tailings residual acid is increased, and moreover the dust generated through gas making of the gas-making type coal is completely and effectively recovered and utilized, interdisciplinary cooperation and optimization and integration of resources are achieved, simultaneously the technical problems of the two different technical fields including the technical field of production of the anhydrous hydrofluoric acid and the technical field of production of fertilizers and synthetic ammonia are solved, and so that remarkable results have been achieved on enterprise economic benefit, social environment benefit and technology development level.
Description
Technical field
The present invention relates to Acid of Hydrofluoric Acid Production technical field, the method for the residual acid of tailings in specifically a kind of low-cost processes Acid of Hydrofluoric Acid Production.
Background technology
In anhydrous hydrofluoric acid production process, excessive residual acid (being mainly composed of Fluohydric acid. and sulphuric acid) is usually contained in the slag (tailings) that stove tail is discharged, the volatilization of residual acid is huge on the impact of environment, way commonly used at present is to deliver to slag hopper with after residual acid excessive in slaked lime and in slag then through slag elevator, to reduce or to eliminate the residual acid content in slag, reduce air pollution.In actual applications, anhydrous hydrofluoric acid manufacturing enterprise usually buys quick lime as raw material, quick lime is added water and after stirring, obtains lime water (i.e. slaked lime), then lime water pump is joined and slag tap in conveying worm, and the residual acid in slag is neutralized reaction.And quick lime is relatively costly, processing procedure also needs to be equipped with a series of equipment as hung Calx platform, belt conveyor, stirring pool, agitator and slush pump etc., therefore causing that the residual acid treatment cost of tailings remains high, treatment effeciency is low, greatly reduces the economic benefit of enterprise.
Chemical fertilizer is fertilizer necessary to agricultural production.China is large agricultural country, and therefore the demand of chemical fertilizer is very big.In recent years, chemical fertilizer products dog-eat-dog, is becoming tight anthracite block coal supply day and coal price rapidly goes up, cause that a lot of chemical fertilizer and ammonia enterprise go up briquette production line one after another, make type coal gasification with cheap fine coal for raw material, so that enterprise obtains benefit, prevail over competition.Common chemical fertilizer gas-making type coal, many employing quick lime and anthracite fine coal are that primary raw material is mixed and processed, and the content of quick lime is 5～30wt%, and concrete consumption is depending on the group property of coal.This gas-making type coal can produce substantial amounts of dust in burning Gas-making, and environmental pollution is big, it is necessary to take special tails dedusting measure to carry out dedusting, and not only processing cost is high, and the dust collected often directly processes as waste material, can not get effective utilization.
Summary of the invention
The present inventor finds through research, with the gas-making type coal that quick lime is made for raw material, containing substantial amounts of CaO in the dust that burning gas making produces.Through chemical examination, quick lime content CaO content in the gas-making type coal of about 30wt%, the dust that gas making produces can reach 52wt%.The CaO of such high-load, can be completely used for Acid of Hydrofluoric Acid Production carries out the residual acid treatment of tailings, as long as dust being mixed with tailings during use, the CaO in dust is utilized to be neutralized with the residual acid in tailings, compare existing employing quick lime add water stirring obtain lime water again mix with tailings neutralize residual acid, cost of material will be substantially reduced undoubtedly, process equipment can also be simplified greatly, treatment effeciency also can be obviously improved, and for chemical fertilizer and ammonia enterprise, the dust being originally considered as waste material have also been obtained sufficient recycling, Business Economic Benefit can also be obviously improved.
Based on the studies above, the present invention proposes techniques below scheme, the dust waste that the gas-making type coal gas making in chemical fertilizer and Ammonia Production field produces successfully has been recycled in anhydrous hydrofluoric acid production field to carry out the neutralisation treatment of the residual acid of tailings by this technical scheme again, achieve cross-cutting cooperation and resource optimization is integrated, solve the technical barrier of two different field simultaneously, no matter it is from Business Economic Benefit, social environment benefit or art, is all achieve significant effect.
To sum up, the technical problem to be solved is to provide in a kind of low-cost processes Acid of Hydrofluoric Acid Production the method for the residual acid of tailings, the method can not only be greatly reduced the processing cost of the residual acid of tailings, improve the treatment effeciency of the residual acid of tailings, and make the dust that gas-making type coal gas making produces obtain sufficiently effective recycling, resource utilization is greatly promoted, and environment and economic benefit achievement are notable.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
A kind of method of the residual acid of tailings in low-cost processes Acid of Hydrofluoric Acid Production, the dust that gas making of being burnt by gas-making type coal containing quick lime produces mixes with tailings, and the residual acid making the calcium oxide contained in dust excessive with tailings is neutralized the reaction residual acid to remove in tailings.
The beneficial effects of the present invention is: be mixed into the neutralisation treatment of the residual acid of end of line slag by dust and the tailings gas-making type coal gas making containing quick lime produced, it is possible not only to be greatly reduced cost of material and the equipment cost of the residual acid treatment of tailings, improve the treatment effeciency of the residual acid of tailings, and make the dust that gas-making type coal gas making produces obtain sufficiently effective recycling, achieve cross-cutting cooperation and resource optimization is integrated, solve anhydrous hydrofluoric acid production field and chemical fertilizer and the technical barrier of these two different field of Ammonia Production field simultaneously, no matter it is from Business Economic Benefit, in social environment benefit or art, all achieve significant effect.
Detailed description of the invention
By describing the technology contents of the present invention in detail, being realized purpose and effect, it is explained below in conjunction with embodiment.
The design of most critical of the present invention is in that: again recycle in anhydrous hydrofluoric acid production field the dust waste that the gas-making type coal gas making containing quick lime of chemical fertilizer and Ammonia Production field produces to carry out the neutralisation treatment of the residual acid of tailings.
Concrete, the method of the residual acid of tailings in low-cost processes Acid of Hydrofluoric Acid Production provided by the invention, adopting the dust that gas making of being burnt by the gas-making type coal containing quick lime produces to mix with tailings, the residual acid making the calcium oxide contained in dust excessive with tailings is neutralized the reaction residual acid to remove in tailings.
In the implementation process of the present invention, in order to improve the treatment effect of the residual acid of tailings, present invention preferably employs the dust produced by the gas-making type coal gas making that quick lime content is 5～30wt%.The content of quick lime is more high, then the calcium oxide content in the dust that gas making produces is also more high, but too high quick lime content, it is unfavorable for the properties of product of gas-making type coal.It is furthermore preferred that the calcium oxide content in the dust of the gas-making type coal gas making generation of present invention employing is not less than 50wt%.Preferred, the dust that the present invention adopts comes from the dust that the gas-making type coal calcining gas making that the fine coal of the quick lime by 30wt% and 70wt% is mixed and processed produces, calcium oxide content in this dust is not less than 50wt%, and do not contain the unfavorable impurity that can affect calcium oxide with residual acid reaction, thus it is more beneficial for improving the treatment effect of the residual acid of tailings.
In the processing procedure of the residual acid of tailings, the dust that gas making of being burnt by gas-making type coal produces is transported to through conveying worm and slags tap in conveying worm, mixes with tailings through auger of slagging tap and is neutralized reaction.Such dust in tapping process, with tailings mix and blend while being neutralized reaction with the residual acid in tailings, can improve treatment effeciency.
Known from the above, the beneficial effects of the present invention is: be mixed into the neutralisation treatment of the residual acid of end of line slag by dust and the tailings gas-making type coal gas making containing quick lime produced, it is possible not only to be greatly reduced cost of material and the equipment cost of the residual acid treatment of tailings, improve the treatment effeciency of the residual acid of tailings, and make the dust that gas-making type coal gas making produces obtain sufficiently effective recycling, achieve cross-cutting cooperation and resource optimization is integrated, solve anhydrous hydrofluoric acid production field and chemical fertilizer and the technical barrier of these two different field of Ammonia Production field simultaneously, no matter it is from Business Economic Benefit, in social environment benefit or art, all achieve significant effect.
Technical solution of the present invention is as follows with the contrast of the residual acid treatment process of existing tailings:
One, the residual acid treatment process of existing tailings
1, Brief Introduction of Process
The stirring that added water by quick lime (Main Ingredients and Appearance CaO) generates lime water (CaOH2), join with pump and slag tap in conveying worm, and the residual acid (mainly Fluohydric acid. and sulphuric acid) in tailings occurs to neutralize reaction, reduces or eliminates residual acid content in slag, reducing air pollution.
2, expense budget:
A, equipment investment: total cost 5.7 ten thousand yuan (set of system, for three set slag-tapping systems, refers to table 1 below)
Table 1
B, buy quick lime expense: tailings acid content per ton is by 1%, and processing 190,000 tons of tailings need to quick lime about 1000 tons, and quick lime presses 400 yuan of calculating per ton (market price 300-500 unit not etc.), direct cost 400,000 yuan/year.
Two, technical solution of the present invention
1, Brief Introduction of Process
The dust that gas making of being burnt by gas-making type coal containing quick lime produces, send into slag tap in conveying worm through conveying worm (convenient metering), through slagging tap, auger mixes with tailings, the calcium oxide in dust is utilized to neutralize with the residual acid in tailings, reduce and even eliminate residual acid content, reach to reduce air-polluting purpose.
2, expense budget:
A, equipment investment: 29100 × 3=8.73 ten thousand yuan of sets (set of system, for three set slag-tapping systems, refers to table 2 below)
Table 2
B, purchase dust expense: estimate by calcium oxide content, if 1 ton of treatable tailings use dust of quick lime need to 1.8 tons, the price 30-35 unit that dust is 1 ton, by 35 yuan of calculating, 1.8 tons 63 yuan, full year cost 6.3 ten thousand yuan, saves 33.7 ten thousand yuan (3 covering devices put into many 30,000 yuan and do not count) than with quick lime.
From above-mentioned contrast it can be seen that adopt the dust that the gas-making type coal burning gas making containing quick lime produces to replace lime water and residual acid in tailings, with low cost, high financial profit.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing description of the present invention to make, or directly or indirectly it is used in relevant technical field, all in like manner include in the scope of patent protection of the present invention.
Claims (3)
1. the method for the residual acid of tailings in a low-cost processes Acid of Hydrofluoric Acid Production, it is characterised in that:
The dust that gas making of being burnt by gas-making type coal containing quick lime produces mixes with tailings, and the residual acid making the calcium oxide contained in dust excessive with tailings is neutralized the reaction residual acid to remove in tailings.
2. the method for the residual acid of tailings in low-cost processes Acid of Hydrofluoric Acid Production according to claim 1, it is characterised in that: the calcium oxide content in the dust that the burning gas making of described gas-making type coal produces is not less than 50wt%.
3. the method for the residual acid of tailings in low-cost processes Acid of Hydrofluoric Acid Production according to claim 1, it is characterized in that: the dust that gas making of being burnt by gas-making type coal produces is transported to through conveying worm and slags tap in conveying worm, mix with tailings through auger of slagging tap and be neutralized reaction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610292117.0A CN105772490B (en) | 2016-05-05 | 2016-05-05 | A kind of method of the residual acid of tailings in low-cost processes Acid of Hydrofluoric Acid Production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610292117.0A CN105772490B (en) | 2016-05-05 | 2016-05-05 | A kind of method of the residual acid of tailings in low-cost processes Acid of Hydrofluoric Acid Production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105772490A true CN105772490A (en) | 2016-07-20 |
| CN105772490B CN105772490B (en) | 2018-06-15 |
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| CN201610292117.0A Active CN105772490B (en) | 2016-05-05 | 2016-05-05 | A kind of method of the residual acid of tailings in low-cost processes Acid of Hydrofluoric Acid Production |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161942A (en) * | 1997-03-21 | 1997-10-15 | 张仕阳 | Method for burning out lime by using gas-making cinder |
| CN101275092A (en) * | 2007-03-26 | 2008-10-01 | 彭德智 | Molded coal made of calcium carbide precipitator dust |
| CN101618292A (en) * | 2008-11-10 | 2010-01-06 | 李元胜 | System for comprehensive utilization of three industrial wastes |
| CN202070283U (en) * | 2011-05-19 | 2011-12-14 | 山东昭和新材料科技股份有限公司 | Tailing cooling and dedusting system of hydrogen fluoride reaction furnace |
| US20120115709A1 (en) * | 2010-11-09 | 2012-05-10 | Sienna Technologies, Inc. | High Temperature Catalysts for Decomposition of Liquid Monopropellants and Methods for Producing the Same |
| CN102531429A (en) * | 2012-01-16 | 2012-07-04 | 郑慧 | Method for synergetically treating fluorine-containing sludge in cement kiln |
-
2016
- 2016-05-05 CN CN201610292117.0A patent/CN105772490B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1161942A (en) * | 1997-03-21 | 1997-10-15 | 张仕阳 | Method for burning out lime by using gas-making cinder |
| CN101275092A (en) * | 2007-03-26 | 2008-10-01 | 彭德智 | Molded coal made of calcium carbide precipitator dust |
| CN101618292A (en) * | 2008-11-10 | 2010-01-06 | 李元胜 | System for comprehensive utilization of three industrial wastes |
| US20120115709A1 (en) * | 2010-11-09 | 2012-05-10 | Sienna Technologies, Inc. | High Temperature Catalysts for Decomposition of Liquid Monopropellants and Methods for Producing the Same |
| CN202070283U (en) * | 2011-05-19 | 2011-12-14 | 山东昭和新材料科技股份有限公司 | Tailing cooling and dedusting system of hydrogen fluoride reaction furnace |
| CN102531429A (en) * | 2012-01-16 | 2012-07-04 | 郑慧 | Method for synergetically treating fluorine-containing sludge in cement kiln |
Non-Patent Citations (1)
| Title |
|---|
| 赵秉华 等: "无水氢氟酸生产工艺过程及环境影响分析", 《江西化工》 * |
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| CN105772490B (en) | 2018-06-15 |
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Effective date of registration: 20200514 Address after: 354000 Jinling Road 6, Jintang Industrial Park, Shaowu City, Nanping, Fujian Patentee after: FUJIAN YONGJING TECHNOLOGY Co.,Ltd. Address before: 354000, Fujian Province, Nanping City, Shaowu province sunshine mouth new ammonia Road No. 18 Patentee before: FUJIAN SHAOWU YONGFEI CHEMICAL Co.,Ltd. |