CN104226599A - Blast furnace dust sorting method - Google Patents
Blast furnace dust sorting method Download PDFInfo
- Publication number
- CN104226599A CN104226599A CN201410462835.9A CN201410462835A CN104226599A CN 104226599 A CN104226599 A CN 104226599A CN 201410462835 A CN201410462835 A CN 201410462835A CN 104226599 A CN104226599 A CN 104226599A
- Authority
- CN
- China
- Prior art keywords
- sieve
- zinc
- blast furnace
- percent
- furnace dust
- 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.)
- Pending
Links
Abstract
The invention relates to a blast furnace dust sorting method, which sequentially comprises the following steps that 1, a certain weight of blast furnace dust is weighed, the weight is generally 250kg to 350kg, and a 100-mesh sieve is used for sieving; 2, after the sieving, the blast furnace dust on the sieve is subjected to chemical analysis, the C content of the blast furnace dust on the sieve is greater than 51.2 percent, and the blast furnace dust on the sieve can replace coke powder to be added into a stainless carbon brick in a matched way; 3, the blast furnace dust under the sieve is sorted by an air flow grading machine, and the turbine rotating frequency in the air flow grading machine is 20 to 60Hz; 4, through the sorting by the air flow grading machine, the blast furnace dust is divided into two parts including low-zinc coarse particles and high-zinc fine particles; the TFe content in the low-zinc coarse particles is more than 55.78 percent, the Zn content in the low-zinc coarse particles is less than 0.24 percent, the recovery rate of the low-zinc coarse particles is 75.6 percent to 86.8 percent; the TFe content in the high-zinc fine particles is less than 24.75 percent, the Zn content in the high-zinc fine particles is more than 0.89 percent, and the recovery rate of the high-zinc fine particles is 13.2 percent to 24.4 percent. The low-zinc coarse particles are used for sintering. The blast furnace dust sorting method has the advantages that secondary pollution is not generated, and in addition, the cost is lower.
Description
Technical field
The present invention relates to a kind of method for separating of gas ash.
Background technology
Gas ash be blast furnace gas final dusting ash, Main Ingredients and Appearance is iron and carbon, but due to zinc content higher, for sintering and ironmaking affect the life of the blast furnace, could realize after dezincify process must being carried out to gas ash recycling.Gas ash Main Ingredients and Appearance is in table 1.The dezincify treatment process of current gas ash mainly contains the technique such as chemical extraction, high temperature reduction.The technology such as chemical extraction then require that the grade of raw material gas ash zinc is greater than 15%, and there is secondary pollution; The equipment investment of high temperature reduction technical requirement Pyrometallurgical method is large, operation and maintenance cost is high; These techniques all do not obtain wide popularization and application.
The chemical analysis wt% of table 1 gas ash
Summary of the invention
In order to overcome the above-mentioned deficiency of the method for separating of existing gas ash, the invention provides one and not producing secondary pollution, and the method for separating of lower-cost blast furnace dust.
Different for varigrained gas ash chemical composition, namely iron content in coarse granule in gas ash, carbon containing are high, high containing zinc in fine grained, carry out sorting to gas ash.The method for separating of gas ash of the present invention first uses 100 orders (metric system order) sieve to sieve gas ash, the composition of the gas ash on sieve is: C>51.2%, Zn<0.3%, TFe<23%, its rate of recovery is 6% ~ 13%, the alternative coke powder of the gas ash on sieve is with addition of containing in carbon brick (stainless dedusting ash joins the cold solid shaping carbon brick of carbon, and this carbon brick is stainless chromium ferronickel water by Metal In Shaft Furnace) stainless; Gas ash under sieve sieve carries out sorting with gas flow sizing machine again.
Gas flow sizing machine mainly carries out classification according to the granularity of gas ash, proportion difference.Gas ash moves to graded region with ascending air under blower fan draft effect, under the powerful centrifugal action that the stage turbine of High Rotation Speed produces (stage turbine frequency 20 ~ 60Hz), make thickness feed separation, the fine grained meeting granularity requirements (<50um) enters cyclone separator and deduster collection by grading wheel, after coarse granule entrainment portions fine grained hits wall, speed disappears, prolong barrel and drop to overfiren air port place, through the strong elutriation effect of Secondary Air, large or fine granule is separated, fine grained rises to graded region secondary grading, coarse granule drops to discharge port place and discharges, gas ash is finally divided into low zinc coarse granule and high zinc fine grained two parts.Low zinc coarse granule TFe>55.78%, Zn<0.24%, rate of recovery 75.6%---86.8%, high zinc fine grained TFe<24.75%, Zn>0.89%, rate of recovery 13.2%---24.4%.Low zinc coarse granule can be directly used in sintering.
This method mainly comprises following step successively:
itake a certain amount of gas ash, general 250kg-350 kg, utilize 100 mesh sieve to sieve;
iIafter screening, chemical analysis is carried out to the gas ash on sieve, the gas ash C>51.2% on sieve, alternative coke powder, with addition of in stainless carbon brick;
iIIthe gas flow sizing machine sorting of gas ash under sieve, in gas flow sizing machine, turbine speed is 20 ~ 60Hz.
iVby gas flow sizing machine sorting, gas ash is divided into low zinc coarse granule and high zinc fine grained two parts.Low zinc coarse granule TFe>55.78%, Zn<0.24%, rate of recovery 75.6%---86.8%, high zinc fine grained TFe<24.75%, Zn>0.89%, rate of recovery 13.2%---24.4%.
Low zinc coarse granule is used for sintering.
Advantage of the present invention is
The invention provides a kind of physical separation method of gas ash sorting, by this physical separation method
Gas ash can be made to reach the object of dezincify, can not secondary pollution be produced, and cost is lower.
detailed description of the invention:
Describe the specific embodiment of the present invention in detail below in conjunction with embodiment, but the specific embodiment of the present invention is not limited to following embodiment.
embodiment 1:
(1) get the gas ash of 300kg, utilize 100 mesh sieve to sieve;
(2), after screening, the gas ash on sieve is 30kg, carries out chemical analysis to the gas ash on sieve, and containing C 58.7%, alternative coke powder, with addition of in stainless carbon brick;
(3) gas ash under sieve is 270kg, the gas flow sizing machine sorting of the gas ash under sieve, turbine speed 40H
z.
(4) gas ash under sieve is finally divided into low zinc coarse granule and high zinc fine grained two parts.Low zinc coarse granule TFe 55.93%, Zn 0.22%, the rate of recovery 78.4%, high zinc fine grained TFe 23.54%, Zn 0.93%, the rate of recovery 21.6%.Low zinc coarse granule can be directly used in sintering.
embodiment 2:
(1) get the gas ash of 320kg, utilize 100 mesh sieve to sieve;
(2), after screening, the gas ash on sieve is 34kg, carries out chemical analysis to the gas ash on sieve, and containing C 52.9%, alternative coke powder, with addition of in stainless carbon brick;
(3) gas ash under sieve is 286kg, the gas flow sizing machine sorting of the gas ash under sieve, turbine speed 30H
z.
(4) gas ash under sieve is finally divided into low zinc coarse granule and high zinc fine grained two parts.Low zinc coarse granule TFe 57.12%, Zn 0.20%, the rate of recovery 76.8%, high zinc fine grained TFe 22.93%, Zn 0.95%, the rate of recovery 23.2%.Low zinc coarse granule can be directly used in sintering.
embodiment 3:
(1) get the gas ash of 270kg, utilize 100 mesh sieve to sieve;
(2), after screening, the gas ash on sieve is 29kg, carries out chemical analysis to the gas ash on sieve, and containing C 53.5%, alternative coke powder, with addition of in stainless carbon brick;
(3) gas ash under sieve is 241kg, the gas flow sizing machine sorting of the gas ash under sieve, turbine speed 36H
z.
(4) gas ash under sieve is finally divided into low zinc coarse granule and high zinc fine grained two parts.Low zinc coarse granule TFe 58.10%, Zn 0.21%, the rate of recovery 76.0%, high zinc fine grained TFe 22.51%, Zn 0.97%, the rate of recovery 24.0%.Low zinc coarse granule can be directly used in sintering.
Claims (2)
1. a method for separating for gas ash, it comprises following step successively:
itake a certain amount of gas ash, utilize 100 mesh sieve to sieve;
iIafter screening, chemical analysis is carried out to the gas ash on sieve, the gas ash C>51.2% on sieve, alternative coke powder, with addition of in stainless carbon brick;
iIIthe gas flow sizing machine sorting of gas ash under sieve, in gas flow sizing machine, turbine speed is 20 ~ 60Hz;
iVby gas flow sizing machine sorting, gas ash is divided into low zinc coarse granule and high zinc fine grained two parts, low zinc coarse granule TFe>55.78%, Zn<0.24%, rate of recovery 75.6%---86.8%; High zinc fine grained TFe<24.75%, Zn>0.89%, rate of recovery 13.2%---24.4%.
2. the method for separating of gas ash according to claim 1, is characterized in that: in step
iVafter, low zinc coarse granule is used for sintering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462835.9A CN104226599A (en) | 2014-09-12 | 2014-09-12 | Blast furnace dust sorting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462835.9A CN104226599A (en) | 2014-09-12 | 2014-09-12 | Blast furnace dust sorting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104226599A true CN104226599A (en) | 2014-12-24 |
Family
ID=52216009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410462835.9A Pending CN104226599A (en) | 2014-09-12 | 2014-09-12 | Blast furnace dust sorting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104226599A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385222A (en) * | 2017-09-18 | 2017-11-24 | 宝钢德盛不锈钢有限公司 | The carbon containing dedusting ash reuse method of rotary kiln and carbon containing dedusting ash reclaiming system |
| CN107586963A (en) * | 2017-08-25 | 2018-01-16 | 鞍钢股份有限公司 | A kind of leaded dedusting ash integrated conduct method |
| CN107586961A (en) * | 2017-08-25 | 2018-01-16 | 鞍钢股份有限公司 | A kind of leaded dedusting ash physics method of removing lead |
| CN107586962A (en) * | 2017-08-25 | 2018-01-16 | 鞍钢股份有限公司 | A kind of reuse method of dedusting ash containing zinc |
| CN107604169A (en) * | 2017-08-25 | 2018-01-19 | 鞍钢股份有限公司 | A kind of method that leaded dedusting ash recycling recycles |
| CN107619946A (en) * | 2017-08-25 | 2018-01-23 | 鞍钢股份有限公司 | A kind of blast furnace flue gas dedusting ash method of comprehensive utilization |
| CN110433956A (en) * | 2019-08-15 | 2019-11-12 | 唐山鑫联环保科技有限公司 | A method of recycling zinc, iron and/or carbon from blast furnace dust |
| CN110564971A (en) * | 2019-10-29 | 2019-12-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recovering zinc from blast furnace gas mud |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142875A (en) * | 1983-02-03 | 1984-08-16 | 住友金属工業株式会社 | Dezincification of blast furnace dust |
| CN1765527A (en) * | 2005-10-17 | 2006-05-03 | 李学曾 | Separation technique of blast furnace ferrous fines |
| CN1883811A (en) * | 2006-07-04 | 2006-12-27 | 武汉天时利工贸有限公司 | Process for separation and comprehensive utilization of blast furnace gas mud |
| CN101428278A (en) * | 2007-11-07 | 2009-05-13 | 首钢总公司 | Method for separating zinc-containing substance of blast furnace dry method dust separation ash |
| CN102851414A (en) * | 2012-09-24 | 2013-01-02 | 柳州市环源利环境资源技术开发有限公司 | Treatment technique of blast furnace fly ash |
| CN103868815A (en) * | 2014-03-05 | 2014-06-18 | 首钢总公司 | Method for evaluating deterioration degree of coke at upper part of blast furnace |
-
2014
- 2014-09-12 CN CN201410462835.9A patent/CN104226599A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142875A (en) * | 1983-02-03 | 1984-08-16 | 住友金属工業株式会社 | Dezincification of blast furnace dust |
| CN1765527A (en) * | 2005-10-17 | 2006-05-03 | 李学曾 | Separation technique of blast furnace ferrous fines |
| CN1883811A (en) * | 2006-07-04 | 2006-12-27 | 武汉天时利工贸有限公司 | Process for separation and comprehensive utilization of blast furnace gas mud |
| CN101428278A (en) * | 2007-11-07 | 2009-05-13 | 首钢总公司 | Method for separating zinc-containing substance of blast furnace dry method dust separation ash |
| CN102851414A (en) * | 2012-09-24 | 2013-01-02 | 柳州市环源利环境资源技术开发有限公司 | Treatment technique of blast furnace fly ash |
| CN103868815A (en) * | 2014-03-05 | 2014-06-18 | 首钢总公司 | Method for evaluating deterioration degree of coke at upper part of blast furnace |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107586963A (en) * | 2017-08-25 | 2018-01-16 | 鞍钢股份有限公司 | A kind of leaded dedusting ash integrated conduct method |
| CN107586961A (en) * | 2017-08-25 | 2018-01-16 | 鞍钢股份有限公司 | A kind of leaded dedusting ash physics method of removing lead |
| CN107586962A (en) * | 2017-08-25 | 2018-01-16 | 鞍钢股份有限公司 | A kind of reuse method of dedusting ash containing zinc |
| CN107604169A (en) * | 2017-08-25 | 2018-01-19 | 鞍钢股份有限公司 | A kind of method that leaded dedusting ash recycling recycles |
| CN107619946A (en) * | 2017-08-25 | 2018-01-23 | 鞍钢股份有限公司 | A kind of blast furnace flue gas dedusting ash method of comprehensive utilization |
| CN107586961B (en) * | 2017-08-25 | 2019-03-26 | 鞍钢股份有限公司 | A kind of leaded dedusting ash physics method of removing lead |
| CN107586962B (en) * | 2017-08-25 | 2019-03-26 | 鞍钢股份有限公司 | A kind of reuse method of dedusting ash containing zinc |
| CN107385222A (en) * | 2017-09-18 | 2017-11-24 | 宝钢德盛不锈钢有限公司 | The carbon containing dedusting ash reuse method of rotary kiln and carbon containing dedusting ash reclaiming system |
| CN107385222B (en) * | 2017-09-18 | 2019-04-09 | 宝钢德盛不锈钢有限公司 | The carbon containing dedusting ash reuse method of rotary kiln and carbon containing dedusting ash reclaiming system |
| CN110433956A (en) * | 2019-08-15 | 2019-11-12 | 唐山鑫联环保科技有限公司 | A method of recycling zinc, iron and/or carbon from blast furnace dust |
| CN110433956B (en) * | 2019-08-15 | 2021-04-20 | 唐山鑫联环保科技有限公司 | Method for recovering zinc, iron and/or carbon from blast furnace gas ash |
| CN110564971A (en) * | 2019-10-29 | 2019-12-13 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for recovering zinc from blast furnace gas mud |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104226599A (en) | Blast furnace dust sorting method | |
| CN104846195B (en) | Method for recovering low-grade precious metal from mineral dressing tailings | |
| CN108325738B (en) | Step recovery method for metal aluminum in aluminum ash | |
| CN211678207U (en) | Steel slag recycling system | |
| CN103551244B (en) | Method for recycling valuable elements from blast furnace flocculated dust | |
| CN102703714A (en) | Method for preparing iron powder and recovering nonferrous metal from blast furnace iron making smoke dust | |
| CN108380360B (en) | Production process of steel slag and iron fine powder | |
| CN108380380A (en) | Product dry type fine crushing sorts Iron concentrate technique | |
| CN105289838A (en) | Technology for recycling tailings through the process of weak magnetism concentration, roasting and regrinding magnetic separation | |
| CN108187880B (en) | A kind of slag advanced treatment process | |
| CN107020201B (en) | Thickener underflow coarse slime recovery system | |
| CN110433956B (en) | Method for recovering zinc, iron and/or carbon from blast furnace gas ash | |
| CN103272711A (en) | Iron mine powder multi-level air classifying system and method | |
| US9315878B2 (en) | System and method for iron ore byproduct processing | |
| CN106311456A (en) | Method for recovering iron concentrates and non-ferrous metals by virtue of head ash of sintering machine | |
| CN110369119B (en) | Comprehensive recovery process for iron, carbon and zinc in steel mill dust waste | |
| CN108940519A (en) | A kind of steel slag freezing crushing method | |
| JP5857916B2 (en) | Control method of small and medium coke for mixing into blast furnace ore. | |
| CN205270143U (en) | Fly ash decarbonization system | |
| CN104724749B (en) | A kind of method for producing ultrafine copper oxide powder | |
| CN203281437U (en) | Multi-stage air classification system for powdered iron ore | |
| CN103740942A (en) | Metal smelting slag separating and recycling production process | |
| CN203874841U (en) | Pulverizing system of mill | |
| CN108405135B (en) | Efficient mud and powder removing and particle shape optimizing method and device for tailing sand | |
| CN104399667A (en) | Stainless steel slag sorting device and stainless steel slag sorting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141224 |
|
| RJ01 | Rejection of invention patent application after publication |