CN107619946A - A kind of blast furnace flue gas dedusting ash method of comprehensive utilization - Google Patents
A kind of blast furnace flue gas dedusting ash method of comprehensive utilization Download PDFInfo
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Abstract
The present invention relates to a kind of blast furnace flue gas dedusting ash method of comprehensive utilization, blast furnace flue gas dedusting ash is passed through air classification wind magnetic separation system, selection by winnowing iron ore concentrate is obtained by air classification, magnetic separation of iron ore concentrate is obtained by wind magnetic separation, selection by winnowing iron ore concentrate and magnetic separation of iron ore concentrate return to sintering, smelting procedure uses；Agglomerate is made after being mixed with the reduction coal after grinding and binding agent in the dry tail ash that sack cleaner traps, agglomerate is reduced ferriferous oxide in agglomerate and zinc oxide after being calcined at high temperature, enter fume recovery system after zinc gasification, metallized briquette is obtained after agglomerate cooling, is used for blast furnace and converter；The dedusting ash in fume recovery system, as zinc-rich miberal powder are collected, zinc raw material is carried as zinc metallurgy and uses.When the present invention solves existing physics dezincification method processing blast furnace flue gas dedusting ash due in blast furnace flue gas dedusting ash Zn content fluctuation it is big and caused by the problem such as the wasting of resources, energy waste, processing cost performance be low；Iron ore concentrate and zinc-rich miberal powder can be extracted.
Description
Technical field
The present invention relates to Metallurgical Solid Wastes technical field of comprehensive utilization, more particularly to a kind of blast furnace flue gas dedusting ash synthesis profit
Use method.
Background technology
Steel smelting procedure each operation can all produce substantial amounts of dirt mud, because dirt mud has certain reuse value, steel
Enterprise returns to sintering generally as secondary raw material and utilized.At present, it is continuously increased with solid waste caused by steel industry,
Environmental protection problem highlights increasingly.Moreover, the recycling in sintering with these solid waste, harmful element is constantly enriched with,
Quality and process direct motion to sintering deposit cause to significantly affect.
At present, domestic recycling of many iron and steel enterprises by zinc-containing dust, sludge in sintering system, causes Zn-ef ficiency
Serious enrichment, Zn-ef ficiency is brought into brings significant damage to smelting, mainly has：1. form accretion at positions such as furnace throat clinker tiles；②
Because dross can cause upper blast furnace Gas Flow disorderly in stove caused by zinc aggregation, there is hanging and collapse material phenomenon；3. destroy furnace lining
Shell of blast furnace is caused to ftracture；4. condensed in blast furnace gas ascending pipe, gather and cause to rise pipe choking；5. sunk at blast-furnace tuyere
Product, refractory material is corroded and causes brick body loose, cause air port to upwarp or damaged；6. causing coke ratio to rise, the saturating of stock column is reduced
Gas；7. stokehold operating environment is severe, poor visibility.Place is processed therefore, it is necessary to which zinc-containing dust, sludge are separated
Reason.How to turn waste into wealth, these dust, sludge are subjected to recycling and harmless treatment, reduces environmental pollution, has become steel
The problem of iron enterprise is extremely urgent.On the other hand, China is a big steel country, and largely abandoning or arrange outside for metallurgical solid waste causes
The substantial amounts of wasting of resources, it, which recycles and recycled, also complies with China's Green Sustainable strategic requirement.
In the 1970s, begin to reclaim the correlative study of Zn, Pb, Fe in Ferrous Metallurgy solid waste both at home and abroad, most
Closely also there is related process report.As people are to the pay attention to day by day of environmental problem, how rational exploitation and utilization dedusting ash more causes
The great attention of enterprise and environmental administration.External such as Japan, recycling of the U.S. to dust, sludge are paid much attention to, by
Professional chemical plant is handled, and has tended to recycling.The utilization of metallurgical dust, sludge includes：By metal recovery, ion exchange is used
Resin system prepares extreme high purity iron oxide, for doing essence pigment, magnetic material, catalyst etc..
Hu Xiaohong et al. delivers entitled《The research of blast furnace gas mud comprehensive utilization》Article, use magnetic separation-shaking table as most
Good technological process.Experiment gained iron ore concentrate all iron content is more than 62%.Zhang Hanquan et al. delivers entitled《Blast Furnace gas mud iron
Recovery process experimental study》Article, can obtain smart mud yield 31.8l%, iron content product using two sections of gravity separation technology flow processings
Position 61.51%, iron recovery are 51.64% more satisfactory index.Cheng Haifang et al. delivers entitled《Blast furnace gas ash it is comprehensive
Close and utilize》Article, flotation combined using weight one, the iron concentrate grade that can make to select reaches 47%~20%, and the rate of recovery reaches
49.24%.Pan Guotai et al. delivers entitled《Brief talk blast furnace dust and put forward carbon iron-extracting process science and technology》Article, using gravity treatment and weak
The technique of the last one magnetic collocation reclaims the iron in gas ash, obtains preferable treatment effect, is maximumlly returned from resource is made
Receive and utilize.Zhang Meifang et al. delivers entitled《Blast furnace of Baoshan Iron ＆ Steel Co. gas mud is recycled with beneficiation method》Article, laboratory use
Flotation-magnetic separation or magnetic separation-flotation combined flow processing blast furnace of Baoshan Iron ＆ Steel Co. dust, the iron ore concentrate of iron content 60% can be obtained, while recovery contains
The carbon powder of carbon 67%.Above several method is the method that several Physicals deviate from zinc in dedusting ash, and technique is relatively simple, processing
Cost is relatively low, but treatment effect is not notable enough.
Wang Jing pines et al. are delivered entitled《Steel plant's zinc-containing dust rotary hearth furnace direct-reduction and dezincification experimental study》Using
Carbon-burdened pellet is made in steel plant's zinc-containing dust, and simulation rotary hearth furnace reduces 10min, gold under the conditions of 1300 DEG C and neutral atmosphere
Belong to rate up to 80%, dezinc degree is up to 97%；She Xuefeng et al. is delivered entitled《Zinc, lead and alkali gold removing behavior in metallurgical dust
Research》Carbonaceous pelletizing is made using iron and steel enterprise's zinc-containing dust, simulates rotary hearth furnace experiment under the high temperature conditions, is 1 in carbon-to-oxygen ratio,
Degree of metalization is more than 70% when 15min is reduced under the conditions of 1250-1300 DEG C of temperature, and dezinc degree reaches 93.4%-98.8%.Horse sunlight etc.
People delivers entitled《Blast furnace dust dezincification based on roasting experiment, de- lead basic research》Blast furnace dust is removed using pyrogenic process
In zinc, explore and analyze the factors such as roasting time, sintering temperature, basicity and chloride additive level to dezincification effect
Affecting laws, optimize pyrogenic process dezincification parameter.These methods handle Zinc-Bearing Wastes significant effect, but rotary hearth furnace process processing contains zinc
Dirt mud one-time investment is huge, and cost and energy consumption are too high, and economic benefit is not notable, more difficult big in today of iron and steel enterprise's meagre profit
Area popularization and application.
All flourish grandsons et al. deliver entitled《Blast furnace dust ammonia soaks dezincification》Article, research made using ammoniacal liquor and ammonium chloride
Deviate from the zinc in blast furnace dust for leaching agent.Optimal extract technology condition is：Using liquid-solid ratio 4:After 1 mixing, adopt at room temperature
3h is stirred with 600r/min speed.On this condition, zinc leaching rate is up to 89%.The method carries zinc solution process compared to pyrogenic process
Flow is simple, and scale of investment is smaller, and processing cost is relatively low, and dezincification significant effect.But due to Zn content in blast furnace dust
Fluctuation range is larger, or even Zn content differs more than 30 times in the different blast furnace dusts of same steel mill.Deviate from using this scheme
During zinc in low zinc gas ash, cause unavoidably excessive with addition of leaching agent, cause the wasting of resources.So in industrial processes
Because the fluctuation of gas ash zinc content brings difficulty to the amount of allocating of leaching agent.
The superfine people of Zhao Rui deliver entitled《From the experimental study of blast furnace dust recovery iron》Article, research is using weak
The method of magnetic-strong magnetic two-stage magnetic separation separates the iron mineral in gas ash and zinc mineral, then by magnetic roasting process by gas
Zinc in ash is further backing out, and is finally obtained grade 60.7%, the iron ore concentrate of the rate of recovery 70%.The process program by magnetic separation with
Pyrogenic process dezincification process integration gets up, and achieves preferable treatment effect, and more have compared to simple pyrogenic process dezincification technique
Economy, but weak magnetic-strong magnetic two-stage gradient magnetic separation effect needs further to be improved, and still suffer from pyrogenic process and take off asking for lead high energy consumption
Topic.The method of processing blast furnace flue gas dedusting ash, which is summed up mainly, at present Physical, pyrogenic process and wet method, in the prior art generally
Using one kind in three kinds of methods, or any two kinds are combined.It is affected by many factors, Zn content in blast furnace flue gas dedusting ash
Fluctuate it is huge, and in existing method, single alternative generally existing treatment effect is undesirable or energy consumption and resource consumption it is big, be processed into
The shortcomings of this is high, and also not yet found in integrated processes a kind of efficient, low input, low energy consumption, low cost and for it is various into
The generally applicable treating method of the dedusting ash of dtex point.
The content of the invention
The invention provides a kind of blast furnace flue gas dedusting ash method of comprehensive utilization, solves existing physics dezincification method processing
During blast furnace flue gas dedusting ash due in blast furnace flue gas dedusting ash Zn content fluctuation it is big and caused by the wasting of resources, energy waste, place
Manage the problems such as cost performance is low；Not only realize the harmless treatment of blast furnace flue gas dedusting ash, and can it is economical, easily extract
Go out iron ore concentrate and zinc-rich miberal powder, create considerable economic benefit.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of blast furnace flue gas dedusting ash method of comprehensive utilization, comprises the following steps：
(1) dry separation, using the dry separation technique of air classification+wind magnetic separation；
1) blast furnace flue gas dedusting ash is passed through air classification-wind magnetic separation system, i.e., removed blast furnace flue gas by air blower
Dirt ash is blown into air channel, separates the big granularity dedusting ash of d >=25 μm by air classification in first paragraph air channel, obtains wind
Select iron ore concentrate；
2) 25 μm of fine granularity dedusting ash of d ＜ proceed into second segment air channel, and second segment sets concentration equipment in air channel, lead to
Cross wind magnetic separation to separate the magnetic material in fine granularity dedusting ash, obtain magnetic separation of iron ore concentrate；
3) air channel is not continued through by the fine granularity dedusting ash that concentration equipment traps, eventually enters into the cloth bag of air channel tail end
Deduster collects；
4) the selection by winnowing iron ore concentrate and magnetic separation of iron ore concentrate isolated by air classification and wind magnetic separation directly return to sintering, smelting
Process is refined to use；The dry tail ash that sack cleaner traps carries out dezincification and proposes zinc processing；
(2) dry tail ash pyrogenic process dezincification：
1) carbon containing reducer is milled to 100~300 mesh, dry tail ash and the carbon containing reducer after grinding, binding agent is pressed 1:
0.15~0.2:Agglomerate is made after stirring than mixing in 0.03~0.05 weight；
2) agglomerate is calcined at high temperature, the ferriferous oxide and zinc oxide in agglomerate are reduced, and enter cigarette after zinc gasification
Gas recovery system, metallized briquette is obtained after agglomerate cooling, is used for blast furnace and converter；
3) dedusting ash in fume recovery system, as zinc-rich miberal powder are collected, zinc raw material is carried as zinc metallurgy and uses.
During the air classification, the air quantity in air channel is 160~270m3/ min, blast are 2000~2800Pa, dedusting ash
Charging rate is 320~350kg/h.
The magnetic field intensity of the concentration equipment is 8000~11000Oe.
The agglomerate sintering temperature is 950~1150 DEG C, and roasting time is 25~30min.
The carbon containing reducer is coal dust or coke powder, and granularity is 100~300 mesh.
Compared with prior art, the beneficial effects of the invention are as follows：
1) by selection by winnowing+magnetic separation+pyrogenic process Zn extraction process, solves existing physics dezincification method due to blast furnace flue gas dedusting ash
The fluctuation of middle Zn content it is big and caused by the wasting of resources, energy waste, the problems such as processing cost performance is low；
2) harmless treatment of blast furnace flue gas dedusting ash is not only realized, reduction Zn-ef ficiency brings all kinds of to smelting production
Harm, and realize the comprehensive utilization of resource；
3) technique simple possible, it is economical and practical, iron ore concentrate and zinc-rich miberal powder can be easily extracted, creates considerable warp
Ji benefit.
Brief description of the drawings
Fig. 1 is a kind of process chart of blast furnace flue gas dedusting ash method of comprehensive utilization of the present invention.
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of blast furnace flue gas dedusting ash method of comprehensive utilization of the present invention, comprises the following steps：
(1) dry separation, using the dry separation technique of air classification+wind magnetic separation；
1) blast furnace flue gas dedusting ash is passed through air classification-wind magnetic separation system, i.e., removed blast furnace flue gas by air blower
Dirt ash is blown into air channel, separates the big granularity dedusting ash of d >=25 μm by air classification in first paragraph air channel, obtains wind
Select iron ore concentrate；
2) 25 μm of fine granularity dedusting ash of d ＜ proceed into second segment air channel, and second segment sets concentration equipment in air channel, lead to
Cross wind magnetic separation to separate the magnetic material in fine granularity dedusting ash, obtain magnetic separation of iron ore concentrate；
3) air channel is not continued through by the fine granularity dedusting ash that concentration equipment traps, eventually enters into the cloth bag of air channel tail end
Deduster collects；
4) the selection by winnowing iron ore concentrate and magnetic separation of iron ore concentrate isolated by air classification and wind magnetic separation directly return to sintering, smelting
Process is refined to use；The dry tail ash that sack cleaner traps carries out dezincification and proposes zinc processing；
(2) dry tail ash pyrogenic process dezincification：
1) carbon containing reducer is milled to 100~300 mesh, dry tail ash and the carbon containing reducer after grinding, binding agent is pressed 1:
0.15~0.2:Agglomerate is made after stirring than mixing in 0.03~0.05 weight；
2) agglomerate is calcined at high temperature, the ferriferous oxide and zinc oxide in agglomerate are reduced, and enter cigarette after zinc gasification
Gas recovery system, metallized briquette is obtained after agglomerate cooling, is used for blast furnace and converter；
3) dedusting ash in fume recovery system, as zinc-rich miberal powder are collected, zinc raw material is carried as zinc metallurgy and uses.
During the air classification, the air quantity in air channel is 160~270m3/ min, blast are 2000~2800Pa, dedusting ash
Charging rate is 320~350kg/h.
The magnetic field intensity of the concentration equipment is 8000~11000Oe.
The agglomerate sintering temperature is 950~1150 DEG C, and roasting time is 25~30min.
The carbon containing reducer is coal dust or coke powder, and granularity is 100~300 mesh.
Following examples are implemented under premised on technical solution of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to following embodiments.Method therefor is such as without spy in following embodiments
It is conventional method not mentionlet alone bright.
【Embodiment 1】
Take No. 5 blast furnace flue gas dedusting ash sample 100kg of certain steel mill.Dry separation is carried out first, opens selection by winnowing hierarchy system
Air blower, regulation pipeline blast to 2800Pa, regulation magnetic field intensity to 11000Oe, blast furnace flue gas dedusting ash sample is added dry
Select in system, charging rate 320kg/h, be collected into selection by winnowing iron ore concentrate, magnetic separation of iron ore concentrate and dry tail ash.
By dry tail ash with the reduction coal after grinding, binding agent by weight 1:0.2:0.04 mixing, is made after well mixed
Iron content agglomerate.Agglomerate is placed in tube furnace in 1100 DEG C of roasting temperature 30min, collects caused metallization group in course of reaction
Dedusting ash (i.e. zinc-rich miberal powder) in block and fume recovery system, chemical analysis, blast furnace flue gas dedusting are carried out to raw material and product
Grey main component is as shown in table 1；
The blast furnace flue gas dedusting ash main component (wt%) of table 1
| TFe | Zn | Pb | K | Na | Cl | |
| Blast furnace flue gas dedusting ash | 40.45 | 8.55 | 0.79 | 1.31 | 0.33 | 0.88 |
Analyze after testing, the product and Contents of Main Components that each step obtains are as shown in table 2：
The test products compositional data (wt%) of table 2
| TFe | Zn | Pb | K | Na | Cl | |
| Selection by winnowing iron ore concentrate | 60.28 | 0.62 | 0.12 | 0.34 | 0.08 | 0.20 |
| Magnetic separation of iron ore concentrate | 57.93 | 0.67 | 0.07 | 0.28 | 0.10 | 0.19 |
| Zinc-rich miberal powder | 10.15 | 61.92 | 1.87 | 3.98 | 1.15 | 2.41 |
| Metallized briquette | 65.39 | 0.12 | 0.02 | 0.18 | 0.09 | 0.12 |
【Embodiment 2】
Take No. 5 blast furnace flue gas dedusting ash sample 100kg of certain steel mill.Dry separation is carried out first, opens selection by winnowing hierarchy system
Air blower, regulation pipeline blast to 2500Pa, regulation magnetic field intensity to 10000Oe, blast furnace flue gas dedusting ash sample is added dry
Select in system, charging rate 330kg/h, be collected into selection by winnowing iron ore concentrate, magnetic separation of iron ore concentrate and dry tail ash.
By dry tail ash with the reduction coal after grinding, binding agent by weight 1:0.2:0.05 mixing, is made after well mixed
Iron content agglomerate.Agglomerate is placed in tube furnace in 1050 DEG C of roasting temperature 25min, collects caused metallization group in course of reaction
Dedusting ash (i.e. zinc-rich miberal powder) in block and fume recovery system, chemical analysis, blast furnace flue gas dedusting are carried out to raw material and product
Grey main component is as shown in table 3；
Table 3 tests blast furnace flue gas dedusting ash component (wt%)
| TFe | Zn | Pb | K | Na | Cl | |
| Blast furnace flue gas dedusting ash | 39.51 | 12.65 | 0.86 | 1.40 | 0.31 | 0.95 |
Analyze after testing, the product and Contents of Main Components that each step obtains are as shown in table 4：
The test products compositional data (wt%) of table 4
| TFe | Zn | Pb | K | Na | Cl | |
| Selection by winnowing iron ore concentrate | 58.85 | 0.74 | 0.17 | 0.46 | 0.11 | 0.37 |
| Magnetic separation of iron ore concentrate | 56.23 | 0.74 | 0.12 | 0.36 | 0.05 | 0.29 |
| Zinc-rich miberal powder | 9.88 | 57.30 | 2.02 | 3.75 | 0.95 | 1.76 |
| Metallized briquette | 65.22 | 0.13 | 0.02 | 0.23 | 0.09 | 0.15 |
【Embodiment 3】
Take No. 5 blast furnace flue gas dedusting ash sample 100kg of certain steel mill.Dry separation is carried out first, opens selection by winnowing hierarchy system
Air blower, regulation pipeline blast to 2600Pa, regulation magnetic field intensity to 9500Oe, blast furnace flue gas dedusting ash sample is added into dry separation
In system, charging rate 350kg/h, selection by winnowing iron ore concentrate, magnetic separation of iron ore concentrate and dry tail ash are collected into.
By dry tail ash and the reduction coal after grinding, binding agent in proportion 1:0.15:0.03 mixing, is made after well mixed and contains
Iron agglomerate.Agglomerate is placed in tube furnace in 950 DEG C of roasting temperature 28min, collects caused metallized briquette in course of reaction
With the dedusting ash (i.e. zinc-rich miberal powder) in fume recovery system, chemical analysis, blast furnace flue gas dedusting ash are carried out to raw material and product
Main component is as shown in table 5；
Table 5 tests blast furnace flue gas dedusting ash component (wt%)
| TFe | Zn | Pb | K | Na | Cl | |
| Blast furnace flue gas dedusting ash | 39.64 | 12.66 | 0.90 | 1.33 | 0.30 | 0.94 |
Analyze after testing, the product and Contents of Main Components that each step obtains are as shown in table 6：
The test products compositional data (wt%) of table 6
| TFe | Zn | Pb | K | Na | Cl | |
| Selection by winnowing iron ore concentrate | 57.26 | 0.85 | 0.31 | 0.31 | 0.09 | 0.40 |
| Magnetic separation of iron ore concentrate | 58.93 | 0.72 | 0.17 | 0.29 | 0.14 | 0.25 |
| Zinc-rich miberal powder | 10.69 | 60.98 | 1.46 | 3.20 | 1.01 | 2.28 |
| Metallized briquette | 64.58 | 0.23 | 0.04 | 0.19 | 0.13 | 0.11 |
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (5)
1. a kind of blast furnace flue gas dedusting ash method of comprehensive utilization, it is characterised in that comprise the following steps：
(1) dry separation, using the dry separation technique of air classification+wind magnetic separation；
1) blast furnace flue gas dedusting ash is passed through air classification-wind magnetic separation system, i.e., by air blower by blast furnace flue gas dedusting ash
Air channel is blown into, the big granularity dedusting ash of d >=25 μm is separated by air classification in first paragraph air channel, obtains selection by winnowing iron
Concentrate；
2) 25 μm of fine granularity dedusting ash of d ＜ proceed into second segment air channel, and second segment sets concentration equipment in air channel, passes through wind
Magnetic separation separates the magnetic material in fine granularity dedusting ash, obtains magnetic separation of iron ore concentrate；
3) air channel is not continued through by the fine granularity dedusting ash that concentration equipment traps, eventually enters into the bag-type dust of air channel tail end
Device collects；
4) the selection by winnowing iron ore concentrate and magnetic separation of iron ore concentrate isolated by air classification and wind magnetic separation directly return to sintering, smelter
Sequence uses；The dry tail ash that sack cleaner traps carries out dezincification and proposes zinc processing；
(2) dry tail ash pyrogenic process dezincification：
1) carbon containing reducer is milled to 100~300 mesh, dry tail ash and the carbon containing reducer after grinding, binding agent is pressed 1:0.15
~0.2:Agglomerate is made after stirring than mixing in 0.03~0.05 weight；
2) agglomerate is calcined at high temperature, the ferriferous oxide and zinc oxide in agglomerate are reduced, and are returned after zinc gasification into flue gas
Receipts system, metallized briquette is obtained after agglomerate cooling, is used for blast furnace and converter；
3) dedusting ash in fume recovery system, as zinc-rich miberal powder are collected, zinc raw material is carried as zinc metallurgy and uses.
A kind of 2. blast furnace flue gas dedusting ash method of comprehensive utilization according to claim 1, it is characterised in that the wind-force point
During level, the air quantity in air channel is 160~270m3/ min, blast are 2000~2800Pa, dedusting ash charging rate is 320~
350kg/h。
A kind of 3. blast furnace flue gas dedusting ash method of comprehensive utilization according to claim 1, it is characterised in that the magnetic separation dress
The magnetic field intensity put is 8000~11000Oe.
A kind of 4. blast furnace flue gas dedusting ash method of comprehensive utilization according to claim 1, it is characterised in that the agglomerate roasting
It is 950~1150 DEG C to burn temperature, and roasting time is 25~30min.
A kind of 5. blast furnace flue gas dedusting ash method of comprehensive utilization according to claim 1, it is characterised in that it is described it is carbon containing also
Former agent is coal dust or coke powder, and granularity is 100~300 mesh.
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| CN108559852A (en) * | 2018-05-07 | 2018-09-21 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of blast furnace dust comprehensive utilization process |
| CN110203927A (en) * | 2019-06-26 | 2019-09-06 | 鞍钢股份有限公司 | A method of active carbon is prepared using coking dead meal as primary raw material |
| CN110747308A (en) * | 2019-11-18 | 2020-02-04 | 武汉科技大学 | Converter LT zinc-containing dust online treatment system and treatment method thereof |
| GB2578275A (en) * | 2018-07-27 | 2020-05-06 | British Steel Ltd | Agglomerate for use in iron-making and/or steel-making |
| CN111349793A (en) * | 2020-04-16 | 2020-06-30 | 沈阳东大山汇环境科技有限公司 | Zinc recovery method and device for blast furnace or shaft furnace |
| CN112708770A (en) * | 2020-12-09 | 2021-04-27 | 攀枝花钢城集团有限公司 | Method for enriching iron, zinc and carbon from gas ash |
| CN113122709A (en) * | 2021-04-16 | 2021-07-16 | 中冶长天国际工程有限责任公司 | Solid waste, sintering and pelletizing cooperative treatment process for guaranteeing iron grade |
| CN114951207A (en) * | 2022-04-29 | 2022-08-30 | 中国地质大学（北京） | Resource material full utilization method for high-speed rail blast furnace ash |
| CN111349793B (en) * | 2020-04-16 | 2024-06-07 | 沈阳东大山汇环境科技有限公司 | Zinc recovery method and device for blast furnace or shaft furnace |
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| CN110203927A (en) * | 2019-06-26 | 2019-09-06 | 鞍钢股份有限公司 | A method of active carbon is prepared using coking dead meal as primary raw material |
| CN110203927B (en) * | 2019-06-26 | 2022-03-22 | 鞍钢股份有限公司 | Method for preparing activated carbon by using coking waste as main raw material |
| CN110747308A (en) * | 2019-11-18 | 2020-02-04 | 武汉科技大学 | Converter LT zinc-containing dust online treatment system and treatment method thereof |
| CN110747308B (en) * | 2019-11-18 | 2023-10-13 | 武汉科技大学 | Online treatment system and method for zinc-containing dust in converter LT |
| CN111349793A (en) * | 2020-04-16 | 2020-06-30 | 沈阳东大山汇环境科技有限公司 | Zinc recovery method and device for blast furnace or shaft furnace |
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| CN113122709A (en) * | 2021-04-16 | 2021-07-16 | 中冶长天国际工程有限责任公司 | Solid waste, sintering and pelletizing cooperative treatment process for guaranteeing iron grade |
| CN114951207A (en) * | 2022-04-29 | 2022-08-30 | 中国地质大学（北京） | Resource material full utilization method for high-speed rail blast furnace ash |
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