CN105381866A - Beneficiation method for extracting iron and carbon from blast furnace bag dust - Google Patents
Beneficiation method for extracting iron and carbon from blast furnace bag dust Download PDFInfo
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- CN105381866A CN105381866A CN201510900733.5A CN201510900733A CN105381866A CN 105381866 A CN105381866 A CN 105381866A CN 201510900733 A CN201510900733 A CN 201510900733A CN 105381866 A CN105381866 A CN 105381866A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
Abstract
The invention relates to a beneficiation method for extracting iron and carbon from blast furnace bag dust, and belongs to the technical field of mineral processing. A slag separating screen for the blast furnace bag dust is used for removing a part of low-grade coarse fraction waste materials, and a fine fraction product flows automatically into a pump pool. After a dispersing agent is added into the fine fraction product, the fine fraction product is driven into a spiral chute through a pump for screening. A concentrate product in the spiral chute enters a first annular shaking table, and a qualified iron concentrate product can be obtained after screening of the concentrate product. First tailing on the first annular shaking table flow automatically into a tailing pressure filter directly. A tailing product in the spiral chute enters a linear vibrating screen. An oversize product is the qualified carbon concentrate, and an undersize product enters a second annular shaking table. A concentrate product on the second annular shaking table returns to the first annular shaking table for rescreening. A second tailing product enters the tailing pressure filter. Filter liquor of the pressure filter serves as circulating water for a beneficiation plant. According to the beneficiation method for extracting the iron and the carbon from the blast furnace bag dust, a valuable element containing the blast furnace bag dust is extracted, the additional value of the valuable element is increased, and the beneficiation method has important practical significance for cleaner production, energy conservation and emission reduction in the iron and steel industries.
Description
Technical field
The invention belongs to technical field of mineral processing, be specifically related to a kind of beneficiation method extracting iron, carbon from furnace cloth bag dust-removing ash.
Background technology
Furnace cloth bag dust-removing ash is the solid particulate matter that blast furnace is discharged in smelting process, and its main component is carbon, iron, zinc etc., has higher value.In the last few years, it is solid waste as iron and steel enterprise that the disposal options of furnace cloth bag dust-removing ash mainly contains three kinds: one, normal employing is stored up or the mode such as row processes outward, so not only cause the serious waste of resource, and environment caused pollute significantly, large iron and steel enterprise hexyl this eliminate; Two is directly return sintering to recycle, and because bag-type dust ash granularity is comparatively thin, and the objectionable impurities carried fully is not removed, and has negative effect to sintering process and blast furnace ironmaking; Three is comprehensive reutilizations, extracts valuable element.
External a lot of experts and scholars reclaim the valuable element of furnace cloth bag dust-removing ash and large quantity research has been carried out in comprehensive utilization, and some is put in production practices.Studies in China metallurgical dust sludge valuable element clean and effective separation and Extraction mainly comprises magnetic separation-gravity separation technology, magnetic separation-floatation process, single floatation process etc., loyal great (the Ding Zhonghao such as grade of such as fourth, Weng Da, He Lijun, Deng. Study on Floatation Process [J]. Wuhan University Of Technology's journal (natural science edition), 2001, 24 (4): 353-354, 360.) microbubble floatation column is utilized, by the flow scheme of Floatation of Removal Carbon-desliming-Counterfloatating desiliconization, process Wuhan Iron and Steel Company microfine blast furnace gas mud, through one roughing with once open a way selected, the carbon ore deposit of carbon containing 65% can be obtained, decarburization mine tailing is through two sections of open circuit desiliconization reverse flotations, and obtaining TFe content is the iron ore concentrate of 52%.Floatation process is adopted to select carbon, iron, although obtain good separation index, but what bring is a series of problems such as medicament controls difficulty, technological process is long, production management is complicated thereupon, therefore, if develop a kind of new and effective technology, extracted by valuable element in bag-type dust ash, increase its added value, this all has important practical significance to steel industry cleaner production, energy-saving and emission-reduction.
Summary of the invention
The present invention is directed to the grey deficiency sorted in technology of existing bag-type dust, provide a kind of grey for raw material with furnace cloth bag dust-removing, from furnace cloth bag dust-removing ash, extract the beneficiation method of iron, carbon.
Realize foregoing invention object by the following technical solutions:
From furnace cloth bag dust-removing ash, extract a beneficiation method for iron, carbon, the method is raw materials used is mainly furnace cloth bag dust-removing ash, it is characterized in that:
(1) put into every ballast screen by furnace cloth bag dust-removing ash, through removing a part of low-grade coarse fraction waste material every ballast screen, fine fraction product carries out ore pulp pretreatment from inflow pump pond;
(2) add dispersant in pump pond, squeeze into spiral chute carry out sorting by adding the ore pulp pump after dispersant;
(3) through the annular separation by shaking table of concentrate product introduction first of spiral chute sorting, after the first annular separation by shaking table, obtain grade is 54 ~ 58%, and the rate of recovery is the iron extract mine producation of 55 ~ 70%, and the mine tailing I of the first annular shaking table is directly from flowing into refuse filter press; The product from failing of spiral chute enters linear vibrating screen, and oversize is qualified carbon ore deposit, and the grade in carbon ore deposit is 62 ~ 68%, and the rate of recovery is 60 ~ 75%; The undersize of linear vibrating screen enters the second annular shaking table, and the concentrate product of the second annular shaking table is back to the first annular shaking table and selects, and product from failing II enters refuse filter press, and the filtrate of filter press uses as ore dressing plant recirculated water.
As preferably: described dispersant is the composite mixture of calgon and waterglass, and the ratio being 2 ~ 3:1 by weight according to calgon and waterglass is re-dubbed dispersant, dry mining amount per ton is 150 ~ 500g/t.
As preferably: in described furnace cloth bag dust-removing ash, the content of TFe is 25% ~ 40%, and fixed carbon content is 25% ~ 40%.
As preferably: describedly select sieve aperture to be 3mm every ballast screen, diameter 300mm, length 500mm every ballast screen.
As preferably: diameter 1500mm selected by described spiral chute, the spiral chute of pitch 540mm.
As preferably: described linear vibrating screen selects wide 1500mm, the linear vibrating screen of long 3000mm.
As preferably: first, second annular shaking table described all selects diameter to be the shaking table of 4000mm.
Compared with the prior art, tool of the present invention has the following advantages:
(1) before spiral chute reselection operation, first add dispersant to ore pulp and carry out pretreatment, dispersant forms adsorption layer on the surface of solid particle, and the electric charge of solid particles surface is increased, improve the intergranular reaction force forming steric hindrance, thus improve the effect of gravity treatment.
(2) dispersant adopts calgon and waterglass to form so that certain proportion is composite, and it is selective that composite reagent enhances in reuse adoption process, and its separating effect is than being used alone the effective of calgon.
(3) utilize the special nature of particle, coke mainly concentrates in coarse fraction material, adopts straight-line oscillation sieve classification just carbon can be sorted out, and this technological process compares flotation flowsheet simply, and cost is low.
(4) have employed annular shaking table in gravity separation technology, this equipment is more effective than conventional separation by shaking table, and under equal conditions separating grade will exceed 2% ~ 5%.
Accompanying drawing explanation
Fig. 1 is Technology Roadmap of the present invention.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is further illustrated.
embodiment 1
Raw material: furnace cloth bag dust-removing ash; Calgon; Waterglass
The full Iron grade 26.54%, SiO of furnace cloth bag dust-removing ash used
2be 15.78%, fixed carbon content is 26.77%, SO
3be 3.45%, CaO be 6.13%, wherein iron mineral mainly exists with the form of bloodstone, magnetic iron ore and fe.
See Fig. 1, put into every ballast screen by furnace cloth bag dust-removing ash, through removing every ballast screen the low-grade coarse fraction waste material that productive rate is 4.15%%, fine fraction product is from inflow pump pond.
Pump adds dispersant in pond, and dispersant is the composite of calgon and waterglass, calgon: waterglass is re-dubbed dispersant for 2.4:1 by weight, and dry mining amount per ton is 260g/t, and the ore pulp after dosing is squeezed into spiral chute by pump and carried out sorting.
Through the annular shaking table of concentrate product introduction first of spiral chute sorting, after sorting, obtain grade is 55.47%, and the rate of recovery is the iron extract mine producation of 58.23%, and the mine tailing I of the first annular shaking table is directly from flowing into refuse filter press; The product from failing of spiral chute enters linear vibrating screen, and oversize is qualified carbon ore deposit, and the grade in carbon ore deposit is 64.57%, and the rate of recovery is 66.50%; Undersize enters the second annular shaking table, and the concentrate product of the second annular shaking table is back to the first annular shaking table and selects, and product from failing II enters refuse filter press, and the filtrate of filter press uses as ore dressing plant recirculated water.
Through technique scheme, finally obtaining full Iron grade is 55.47%, the rate of recovery be 58.23% smelting iron ore concentrate and fixed carbon content be 64.57%, the rate of recovery is the carbon ore deposit of 66.50%.
embodiment 2
Raw material: furnace cloth bag dust-removing ash; Calgon; Waterglass
The full Iron grade 29.18%, SiO of furnace cloth bag dust-removing ash used
2be 13.45%, fixed carbon content is 28.45%, SO
3be 3.71%, CaO be 8.02%, wherein iron mineral mainly exists with the form of bloodstone, magnetic iron ore and fe.
See Fig. 1, furnace cloth bag dust-removing ash is through removing every ballast screen the low-grade coarse fraction waste material that productive rate is 5.07%, and fine fraction product is from inflow pump pond;
Pump adds dispersant in pond, and dispersant is the composite of calgon and waterglass, calgon: waterglass is re-dubbed dispersant for 2.8:1 by weight, and dry mining amount per ton is 230g/t, and the ore pulp after dosing is squeezed into spiral chute by pump and carried out sorting;
Through the concentrate product introduction 1 of spiral chute sorting
#annular shaking table, can obtain grade after sorting is 56.15%, and the rate of recovery is the iron extract mine producation of 59.43%, 1
#the mine tailing I of annular shaking table is directly from flowing into refuse filter press; The product from failing of spiral chute enters linear vibrating screen, and oversize is qualified carbon ore deposit, and the grade in carbon ore deposit is 65.02%, and the rate of recovery is 66.78%; Undersize enters 2
#annular shaking table, 2
#the concentrate product of annular shaking table is back to 1
#annular shaking table selects again, and product from failing II enters refuse filter press, and the filtrate of filter press uses as ore dressing plant recirculated water.
Of the present inventionly select φ 300 × 500 type every ballast screen, sieve aperture is 3mm, diameter 300mm, length 500mm every ballast screen.
φ 1500 type selected by spiral chute, selects diameter 1500mm, the spiral chute of pitch 540mm.
Linear vibrating screen selects 1500 × 3000 types, selects wide 1500mm, the linear vibrating screen of long 3000mm.
First, second annular shaking table selects diameter to be the shaking table of 4000mm respectively.
Through technique scheme, finally obtaining full Iron grade is 56.15%, the rate of recovery be 59.43% smelting iron ore concentrate and fixed carbon content be 65.02%, the rate of recovery is the carbon ore deposit of 66.78%.
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.
Claims (7)
1. from furnace cloth bag dust-removing ash, extract a beneficiation method for iron, carbon, the method is raw materials used is mainly furnace cloth bag dust-removing ash, it is characterized in that:
(1) put into every ballast screen by furnace cloth bag dust-removing ash, through removing a part of low-grade coarse fraction waste material every ballast screen, fine fraction product carries out ore pulp pretreatment from inflow pump pond;
(2) add dispersant in pump pond, squeeze into spiral chute carry out sorting by adding the ore pulp pump after dispersant;
(3) through the annular separation by shaking table of concentrate product introduction first of spiral chute sorting, after the first annular separation by shaking table, obtain grade is 54 ~ 58%, and the rate of recovery is the iron extract mine producation of 55 ~ 70%, and the mine tailing I of the first annular shaking table is directly from flowing into refuse filter press; The product from failing of spiral chute enters linear vibrating screen, and oversize is qualified carbon ore deposit, and the grade in carbon ore deposit is 62 ~ 68%, and the rate of recovery is 60 ~ 75%; The undersize of linear vibrating screen enters the second annular shaking table, and the concentrate product of the second annular shaking table is back to the first annular shaking table and selects, and product from failing II enters refuse filter press, and the filtrate of filter press uses as ore dressing plant recirculated water.
2. the beneficiation method extracting iron, carbon from furnace cloth bag dust-removing ash according to claim 1, it is characterized in that: described dispersant is the composite mixture of calgon and waterglass, the ratio being 2 ~ 3:1 by weight according to calgon and waterglass is re-dubbed dispersant, and dry mining amount per ton is 150 ~ 500g/t.
3. the beneficiation method extracting iron, carbon from furnace cloth bag dust-removing ash according to claim 1, is characterized in that: in described furnace cloth bag dust-removing ash, the content of TFe is 25% ~ 40%, and fixed carbon content is 25% ~ 40%.
4. the beneficiation method extracting iron, carbon from furnace cloth bag dust-removing ash according to claim 1, is characterized in that: describedly select sieve aperture to be 3mm every ballast screen, diameter 300mm, length 500mm.
5. the beneficiation method extracting iron, carbon from furnace cloth bag dust-removing ash according to claim 1, is characterized in that: diameter 1500 selected by described spiral chute, pitch 540mm.
6. the beneficiation method extracting iron, carbon from furnace cloth bag dust-removing ash according to claim 1, is characterized in that: described linear vibrating screen selects wide 1500mm, long 3000mm.
7. the beneficiation method extracting iron, carbon from furnace cloth bag dust-removing ash according to claim 1, is characterized in that: diameter 4000mm all selected by first, second annular shaking table described.
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Cited By (7)
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| CN109046749A (en) * | 2018-08-27 | 2018-12-21 | 威海市海王旋流器有限公司 | A kind of blast furnace ash efficient separation purification system and method for purification |
| CN109530075A (en) * | 2017-09-22 | 2019-03-29 | 中南大学 | A method of carbonaceous is separated and recovered from the raw material low-cost high-efficiency containing carbonaceous |
| CN110039064A (en) * | 2019-05-31 | 2019-07-23 | 唐山鑫联环保科技有限公司 | A method of reproducibility iron powder is prepared using blast furnace dust smelted furnace cinder |
| CN110328044A (en) * | 2019-08-15 | 2019-10-15 | 什邡鑫联环保科技有限公司 | A kind of method of blast furnace dust resource 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 |
| CN112844884A (en) * | 2021-02-07 | 2021-05-28 | 山东科技大学 | Efficient iron separation system and method for blast furnace gas mud |
| CN114917682A (en) * | 2022-07-22 | 2022-08-19 | 北京蒂本斯工程技术有限公司 | Blast furnace dust removal ash separation system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109530075A (en) * | 2017-09-22 | 2019-03-29 | 中南大学 | A method of carbonaceous is separated and recovered from the raw material low-cost high-efficiency containing carbonaceous |
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| CN110039064A (en) * | 2019-05-31 | 2019-07-23 | 唐山鑫联环保科技有限公司 | A method of reproducibility iron powder is prepared using blast furnace dust smelted furnace cinder |
| CN110328044A (en) * | 2019-08-15 | 2019-10-15 | 什邡鑫联环保科技有限公司 | A kind of method of blast furnace dust resource utilization |
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| 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 |
| CN112844884A (en) * | 2021-02-07 | 2021-05-28 | 山东科技大学 | Efficient iron separation system and method for blast furnace gas mud |
| CN112844884B (en) * | 2021-02-07 | 2022-07-05 | 山东科技大学 | High-efficiency iron separation system and method for blast furnace gas mud |
| CN114917682A (en) * | 2022-07-22 | 2022-08-19 | 北京蒂本斯工程技术有限公司 | Blast furnace dust removal ash separation system |
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