CN101713023A - Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology - Google Patents
Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology Download PDFInfo
- Publication number
- CN101713023A CN101713023A CN200910234306A CN200910234306A CN101713023A CN 101713023 A CN101713023 A CN 101713023A CN 200910234306 A CN200910234306 A CN 200910234306A CN 200910234306 A CN200910234306 A CN 200910234306A CN 101713023 A CN101713023 A CN 101713023A
- Authority
- CN
- China
- Prior art keywords
- metallurgical industry
- forming method
- proportioning
- wetting
- batching
- 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
Images
Abstract
The invention provides a forming method for metallurgical industry dust and sludge containing hazardous elements for the reduction technology, which comprises the steps of proportioning, wetting, milling, forming, screening and drying, wherein in the proportioning step, the metallurgical industry dust and sludge and a binding agent are compounded, and as required, in the industry dust and sludge, the total carbon content is controlled at 9%-16%, the CaO content is less than or equal to 12.0%, and the R2(CaO/SiO2) content is less than or equal to 1.5; the wetting step requires that the water content of the ingredients after wetting is 4%-8%; the milling step requires that the milling time is 5min-30min; and the forming step requires that forming is carried out when the water content of the ingredients reaches 8%-18%. The quality indexes of green balls or green blocks produced by the invention all meet the reduction technology requirements of a rotary hearth furnace, the compressive strength of the green balls is larger than or equal to 15N/P, the compressive strength of the dried balls is larger than or equal to 70N/P, the cracking rate of the dried balls is less than 4%, the compressive strength of the dried pressing blocks is larger than or equal to 300N/P, and the cracking rate of the dried pressing blocks is less than 4%.
Description
Technical field
The invention belongs to metallurgical industry dirt mud and recycle the field, relate in particular to the forming method that contains harmful element metallurgical industry dirt mud that is used for reducing process
Background technology
In existing reducing process, generally need carry out reducing again after the agglomeration to powder material, purpose is to alleviate the dust pollution of environment and enhance productivity.As the direct reducing process of iron ore pellets, promptly earlier to after the iron ore concentrate raw materials pretreatment, add binding agent and make ball or pressure ball, green pellets adopts reduction apparatuss such as rotary kiln, shaft furnace to reduce after drying again.The metallurgical industry dirt mud that contains harmful element is mainly metallurgical industry and produces dedusting ash and the dedusting mud that produces, characteristics are that the Chemical Composition fluctuation is big, poor, the agglomeration poor performance of raw material water-absorbent, adopt common agglomeration process condition and parameter, agglomeration becomes low, the intensity difference of piece rate, is difficult to satisfy the requirement of reducing process.
Summary of the invention
In order to overcome the defective that prior art exists, the invention provides a kind of metallurgical industry dirt mud forming method that contains harmful element that is used for reducing process, use the green-ball of this method production or the technology quality index of piece all to satisfy the rotary hearth furnace reduction processing requirement.
For solving the problems of the technologies described above, a kind of metallurgical industry dirt mud forming method that contains harmful element that is used for reducing process provided by the invention, comprise batching, wetting, mill, moulding, screening, drying step, it is characterized in that:
Described batching step uses the configuration of metallurgical industry dirt mud adding additives to form, and requires that full carbon content is controlled at 9%～16%, CaO content≤12.0%, R in the industrial dust mud
2(CaO/SiO
2) be controlled at≤1.5;
It is 4%～8% that described wetting step requires the wetting back of batching water ratio;
It is 5min～30min that the described step of milling requires grinding time;
The moisture content of described forming step requirement batching reaches 8%～18% and carries out moulding.
In the described batching step, carbon containing dedusting ash proportioning 40%, other dedusting ash proportioning 60% is joined wilkinite 2.5% outward, and it is 9.1% that compound contains full carbon.
In the described batching step, mud cream proportioning 25%, carbon containing dedusting ash 25%, other dedusting ash proportioning 50% is joined wilkinite 1.8% outward, and it is 12.4% that compound contains full carbon.
In the described batching step, the mud cream proportioning 55% of drying, other dedusting ash proportioning 45% is joined wilkinite 1.0% outward, and it is 15.5% that compound contains full carbon
Described forming step adopts disk to make ball, and making the ball time is 15min～60min.
Described forming step adopts pair roller briquetting press briquetting, and briquetting pressure is 15MPa～50MPa.
The design philosophy of the technology of the present invention solution is:
A kind of forming method that contains harmful element metallurgical industry dirt mud that is used for reducing process, the metallurgical industry dust that will contain harmful element and carbon is by adding water-wet, milling; Mill after maybe will containing the metallurgical industry mud cream of harmful element and carbon and dust compounding; Maybe will contain the metallurgical industry mud slurry dehydration that is harmful to element and carbon, dry back and dust compounding, add water-wet, mill, adopt balling disc or the agglomeration of pair roller briquetting press again, then screening, drying.
Full carbon content is controlled at 9%～16%, CaO content≤12.0%, R in the present invention's batching
2(CaO/SiO
2) be controlled at≤1.5.The reason of full carbon range control is to guarantee to have enough C
GuMetal oxide is reduced, simultaneously be unlikely to residual too much carbon again and reduce the intensity of pelletizing or briquetting; The control of admixtion CaO content mainly is because CaO can generate Ca (OH) when making ball or briquetting
2, and pelletizing and briquetting in drying process because of Ca (OH)
2Dehydration volumetric shrinkage and cracking reduces dry ball intensity; Admixtion R
2Control mainly is the amount of liquid phase that control pelletizing or briquetting generate in the high temperature reduction process, prevents that pelletizing or briquetting from boning mutually and bond furnace bottom.
The present invention adopts full carbon to substitute fixed carbon (C
Gu) the batching carbon content is controlled in advance, be because the C in the batching
GuMainly from blast furnace gas mud or bag-type dust ash, and contain FeO in gas mud or the bag-type dust ash, adopt and survey C
Gu" burning subtraction ", influenced by FeO to be difficult to accurate mensuration, through the experiment comparative determination, full carbon and C in the admixtion
GuGap is very little, can adopt and survey the alternative C of survey of full carbon
GuThe pre-control of carbon is joined in realization to admixtion.
The wetting back of admixtion of the present invention water ratio is 4%～8%, is 5min～30min according to the different admixtion grinding time of dirt mud pellet degree.The present invention adopts balling disc to make ball, and making the ball time is 15min～60min, and in this scope, proper extension is made the ball time will improve the intensity of green-ball effectively.The present invention also can adopt the pair roller briquetting press to carry out briquetting, and briquetting pressure is 15MPa～50MPa, in this scope, suitably improves briquetting pressure and will improve the intensity of pressure ball effectively.Agglomeration or when making ball, batching moisture content should be 8%～18%.
Use the green-ball of the present invention's production or the technology quality index of piece all to satisfy the rotary hearth furnace reduction processing requirement.Metallurgical industry dirt mud adopts balling disc to make ball, green-ball balling ratio 〉=80%, green-ball 1m drop number 〉=20 times/P, compression strength of green pellet 〉=15N/P; Dry ball ultimate compression strength 〉=70N/P, dry ball burst rate＜4%, the useless admittedly green-ball and the dry ball technology quality index of gained all satisfy the rotary hearth furnace reduction processing requirement.Metallurgical industry dirt mud adopts pair roller briquetting press briquetting, briquetting balling ratio 〉=75%, briquetting 0.5m drop number 〉=8 times/P, 1m dropping strength 〉=3 time after the briquetting drying/P, ultimate compression strength 〉=300N/P, the dry burst rate of briquetting＜4%, the briquetting technique quality index of gained satisfies the reducing process requirement.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is the metallurgical industry dirt mud forming method process flow diagram that contains harmful element that is used for reducing process.
Embodiment
With 6 embodiment the present invention is described better below.
Embodiment 1
Carbon containing dedusting ash proportioning 40%, other dedusting ash proportioning 60% is joined wilkinite 2.5% outward.It is 9.1% that compound contains full C, wetting moisture content is 4.5% after the mixing of materials, 9min mills, make ball time 30min, the pelletizing moisture content of producing is 13.73%, and the pelletizing granularity is 8～18mm, compression strength of green pellet is 17.80N/P, 1.0m shatter strength of green pellet is 23.3 times/P, after 200 ℃ of dryings, dry ball ultimate compression strength is 71.55N/P.
Embodiment 2
Mud cream proportioning 25%, carbon containing dedusting ash 25%, other dedusting ash proportioning 50% is joined wilkinite 1.8% outward.It is 12.4% that compound contains full C, wetting moisture content is 5.0% after the mixing of materials, 12min mills, make ball time 25min, the pelletizing moisture content of producing is 11.42%, and the pelletizing granularity is 8～18mm, compression strength of green pellet is 18.05N/P, 1.0m shatter strength of green pellet is 22.1 times/P, after 200 ℃ of dryings, dry ball ultimate compression strength is 73.08N/P.
Embodiment 3
The mud cream proportioning 55% of drying, other dedusting ash proportioning 45% is joined wilkinite 1.0% outward.It is 15.5% that compound contains full C, wetting moisture content is 5.5% after the mixing of materials, 12min mills, make ball time 20min, the pelletizing moisture content of producing is 10.47%, and the pelletizing granularity is 8～18mm, compression strength of green pellet is 19.30N/P, 1.0m shatter strength of green pellet is 21.8 times/P, after 200 ℃ of dryings, dry ball ultimate compression strength is 75.98N/P.
The test-results of above embodiment 1～3 is illustrated in the table 1, and the test-results of embodiment 4～6 is illustrated in the table 2.
Embodiment 4
Carbon containing dedusting ash proportioning 40%, other dedusting ash proportioning 60% is joined wilkinite 2.5% outward.It is 10.5% that compound contains full C, and wetting moisture content is 6% after the mixing of materials, and the 15min that mills adopts pair roller briquetting press briquetting under the pressure of 15MPa, and the wet pressing bulk strength is 9.2 times/0.5m, and the dry-pressing bulk strength is 4.1 times/1.0m, and ultimate compression strength is 322N/P.
Embodiment 5
Mud cream proportioning 25%, carbon containing dedusting ash 25%, other dedusting ash proportioning 50% is joined wilkinite 1.8% outward.It is 11.8% that compound contains full C, and wetting moisture content is 6% after the mixing of materials, and the 18min that mills adopts pair roller briquetting press briquetting under the pressure of 18MPa, and the wet pressing bulk strength is 10.4 times/0.5m, and the dry-pressing bulk strength is 3.8 times/1.0m, and ultimate compression strength is 308N/P.
Embodiment 6
The mud cream proportioning 55% of drying, other dedusting ash proportioning 45% is joined wilkinite 1.0% outward.It is 14.2% that compound contains C, and wetting moisture content is 6% after the mixing of materials, and the 18min that mills adopts pair roller briquetting press briquetting under the pressure of 18MPa, and the wet pressing bulk strength is 9.6 times/0.5m, and the dry-pressing bulk strength is 4.0 times/1.0m, and ultimate compression strength is 319N/P.
Table 1
Table 2
As can be seen, the metallurgical industry dirt mud that contains harmful element is adopted forming method of the present invention from table 1, table 2, the ball of producing or the quality of piece satisfy the reducing process requirement.
Claims (6)
1. metallurgical industry dirt mud forming method that is used for containing of reducing process of harmful element, comprise batching, wetting, mill, moulding, screening, drying step, it is characterized in that:
Described batching step uses the configuration of metallurgical industry dirt mud adding additives to form, and requires that full carbon content is controlled at 9%～16%, CaO content≤12.0%, R in the industrial dust mud
2(CaO/SiO
2) be controlled at≤1.5;
It is 4%～8% that described wetting step requires the wetting back of batching water ratio;
It is 5min～30min that the described step of milling requires grinding time;
The moisture content of described forming step requirement batching reaches 8%～18% and carries out moulding.
2. the metallurgical industry dirt mud forming method that contains harmful element that is used for reducing process as claimed in claim 1 is characterized in that described forming step adopts disk to make ball, and making the ball time is 15min～60min.
3. the metallurgical industry dirt mud forming method that contains harmful element that is used for reducing process as claimed in claim 1 is characterized in that described forming step adopts pair roller briquetting press briquetting, and briquetting pressure is 15MPa～50MPa.
4. the metallurgical industry dirt mud forming method that contains harmful element that is used for reducing process as claimed in claim 1 is characterized in that, in the described batching step, carbon containing dedusting ash proportioning 40%, other dedusting ash proportioning 60% is joined wilkinite 2.5% outward, and it is 9.1% that compound contains full carbon.
5. the metallurgical industry dirt mud forming method that contains harmful element that is used for reducing process as claimed in claim 1, it is characterized in that, in the described batching step, mud cream proportioning 25%, carbon containing dedusting ash 25%, other dedusting ash proportioning 50% is joined wilkinite 1.8% outward, and it is 12.4% that compound contains full carbon.
6. the metallurgical industry dirt mud forming method that contains harmful element that is used for reducing process as claimed in claim 1 is characterized in that, in the described batching step, the mud cream proportioning 55% of drying, other dedusting ash proportioning 45% is joined wilkinite 1.0% outward, and it is 15.5% that compound contains full carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234306A CN101713023A (en) | 2009-11-24 | 2009-11-24 | Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234306A CN101713023A (en) | 2009-11-24 | 2009-11-24 | Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101713023A true CN101713023A (en) | 2010-05-26 |
Family
ID=42417019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910234306A Pending CN101713023A (en) | 2009-11-24 | 2009-11-24 | Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101713023A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962717A (en) * | 2010-10-26 | 2011-02-02 | 马钢设计研究院有限责任公司 | Raw material treatment and pelletizing system process for rotary hearth furnace |
| CN107267747A (en) * | 2017-06-20 | 2017-10-20 | 武汉钢铁有限公司 | The method for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material |
| CN107326128A (en) * | 2017-07-18 | 2017-11-07 | 重庆赛迪热工环保工程技术有限公司 | A kind of ion dust mud contaning rotary hearth furnace handling process |
-
2009
- 2009-11-24 CN CN200910234306A patent/CN101713023A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962717A (en) * | 2010-10-26 | 2011-02-02 | 马钢设计研究院有限责任公司 | Raw material treatment and pelletizing system process for rotary hearth furnace |
| CN107267747A (en) * | 2017-06-20 | 2017-10-20 | 武汉钢铁有限公司 | The method for promoting chromium-bearing sludge dispersed in agglomeration for iron mine material |
| CN107326128A (en) * | 2017-07-18 | 2017-11-07 | 重庆赛迪热工环保工程技术有限公司 | A kind of ion dust mud contaning rotary hearth furnace handling process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102206744B (en) | Method for granulating sinter mixture | |
| WO2021197258A1 (en) | Oxidized pellet binding agent made from low-rank coal, preparation method for same, and applications thereof | |
| CN109266847B (en) | Preparation method of low-temperature consolidated metallurgical pellets | |
| CN101649392A (en) | Pelletizing method of ilmenite concentrates and pellet binder | |
| CN103320607B (en) | A kind of cold-consolidated ball and preparation method thereof | |
| CN111809045B (en) | Cold pressing block for converter and preparation method thereof | |
| CN101407858A (en) | Preparation of carbonaceous composite pellet containing manganese | |
| CN103114201A (en) | Agglomeration method for iron containing dust slime of iron and steel plants | |
| CN103276203B (en) | Production method of stainless steel dusting ash pellets | |
| CN109055731B (en) | Dust granulation process and iron ore sintering process | |
| CN103451421B (en) | A kind of preparation method of blast furnace gas mud pre-reduced pellet | |
| CN101713023A (en) | Forming method for metallurgical industry dust and sludge containing hazardous elements for reduction technology | |
| CN103160302A (en) | Processing method of metallurgical dust mud containing iron carbon zinc | |
| CN103409619A (en) | Cooled agglomerated pellet and preparation method thereof | |
| KR102630996B1 (en) | Iron ore fine aggregate manufacturing process and agglomeration products | |
| JP2015137379A (en) | Non-burning carbonaceous material interior ore for blast furnace and manufacturing method therefor | |
| CN104805280A (en) | Technology for producing metal furnace burden for high-quality electric furnace by coal-based method | |
| JP6228149B2 (en) | Manufacturing method of carbon material interior ore | |
| CN103397178A (en) | Molding and agglomerating process of secondary iron-contained mud from iron and steel plant | |
| CN115874047A (en) | Fluxed pellet containing specularite and preparation method thereof | |
| CN102628099B (en) | Method for forming balls by cooling and solidifying mineral powder by using water glass as bonding agent | |
| JP5786668B2 (en) | Method for producing unfired carbon-containing agglomerated mineral | |
| CN112522509B (en) | Preparation process of cold-pressed red mud pellets, and product and application thereof | |
| CN111676369B (en) | Process method for improving roasting consolidation performance of high-proportion sulfate slag pellets | |
| CN110004289B (en) | Method for producing fluxed pellets by using high-proportion sintering card powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100526 |