CN105018663A - Molten iron biomass composite insulation agent and preparation method and application thereof - Google Patents
Molten iron biomass composite insulation agent and preparation method and application thereof Download PDFInfo
- Publication number
- CN105018663A CN105018663A CN201510498857.5A CN201510498857A CN105018663A CN 105018663 A CN105018663 A CN 105018663A CN 201510498857 A CN201510498857 A CN 201510498857A CN 105018663 A CN105018663 A CN 105018663A
- Authority
- CN
- China
- Prior art keywords
- molten iron
- heat preserving
- preserving agent
- combined heat
- biomass combined
- 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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a molten iron biomass composite insulation agent and a preparation method and application thereof. The molten iron biomass composite insulation agent comprises 65-75% of biological carbon powder, 5-15% of vermiculite powder, 5-15% of power plant coarse ash and 5-15% of quick lime. The molten iron biomass composite insulation agent is added into molten iron, and 0.3-0.7 kg of the insulation agent is added into each ton of molten iron. The molten iron biomass composite insulation agent has good thermal insulation performance and good spreadability. After the insulation agent is added into the molten iron, the surface of the molten ion is not prone to agglomeration, and heat release is slow, and therefore the situation that the temperature of the molten iron is lowered can be effectively prevented. A certain slag melting and desulfurization function is achieved in the heat releasing process. The preparation cost of the insulation agent is far lower than that of existing carbonized rice husks, and the thermal insulation cost of the molten iron is effectively reduced.
Description
Technical field
The invention belongs to the front auxiliary material of State of Blast Furnace and manufacture technology field, be specifically related to biomass combined heat preserving agent of a kind of molten iron and its preparation method and application.
Background technology
Blast furnace smelting iron is successive processes reduction of iron ore being become the pig iron.During production, constantly load iron ore, coke, flux from furnace roof.Iron ore produces iron by reduction reaction, and molten iron is released from iron notch.Molten iron is put in hot-metal ladle and carriage, is transported to steel-making converter, can converter steelmaking be carried out.According to the technique of converter steelmaking, the heat basic source of converter steelmaking is in the physical thermal of molten iron and chemical heat, and under the condition that chemical heat is certain, the physical thermal of molten iron determines to smelt the key factor of whether carrying out smoothly.But between iron-smelting blast furnace to steel-making converter, shipment distance is far away, and the waiting time is long, and the temperature drop of molten iron is larger.The low ash of molten iron temperature causes converter blow loss large, degradation adverse consequences under steel technology high and furnace life.Molten iron temperature is not only very important to process for making, also there is impact to the conveying of molten iron, if molten iron temperature in course of conveying is too low, the crust of iron ladle, the knot end can be caused, directly affect normal production operation, therefore the temperature drop of hot metal transport process is field of metallurgy question of common concern.
At present, be typically employed in molten iron and add heat preserving agent to reach the object reducing hot metal temperature drop, but existing hot-metal insulating agent composition is carbonization rice husk, the cost of carbonization rice husk is higher, increases hot-metal insulating cost.
Single biomass carbonaceous material also can be used as heat preserving agent, but from physical and chemical index analysis, fixed carbon content is the twice of carbonization rice husk, be used alone that to be not only cost high, waste one's talent on a petty job uneconomical, the more important thing is from combustion test and show, rate of combustion is about 1mm/min, one deck 20 ~ 30 mm tectum is formed on iron flask surface after dropping into iron flask, just burning completely no longer heat release after 30min, heat insulation effect greatly reduces, and iron flask be 2 ~ 3h is also ordinary affair in transport with in the steel-making waiting time, how to allow the slow heat release of heat preserving agent, and there is certain change slag in the process of heat release, desulfurizing function is exactly the key problem in technology that the present invention will solve.
Summary of the invention
The first object of the present invention is to provide a kind of molten iron biomass combined heat preserving agent, the second object of the present invention is the preparation method providing the biomass combined heat preserving agent of described molten iron, and the third object of the present invention is the application providing biomass combined dose of described molten iron.
The first object of the present invention realizes like this, the biomass combined heat preserving agent of a kind of molten iron, calculate by weight percentage, the biomass combined heat preserving agent of described molten iron comprises the biological powdered carbon of 65-75%, the vermiculite power of 5-15%, power plant's cinder of 5-15% and 5-15% unslaked lime.
The second object of the present invention realizes like this, the preparation method of the biomass combined heat preserving agent of a kind of molten iron, take 65-75% biological powdered carbon, 5-15% vermiculite power, 5-15% power plant cinder and 5-15% unslaked lime to mix at 20-40 DEG C, seal and pack the obtained biomass combined heat preserving agent of molten iron.
The third object of the present invention realizes like this, the application of the biomass combined heat preserving agent of a kind of molten iron in hot-metal insulating, join in molten iron by biomass combined for described molten iron heat preserving agent, in molten iron per ton, the biomass combined heat preserving agent add-on of described molten iron is 0.3-0.7kg/ ton.
Compared with prior art, the present invention has following beneficial effect: the biomass combined heat preserving agent of molten iron provided by the invention has good heat-insulating property and good spreadability, after described heat preserving agent is added molten iron, be not easy on the surface of molten iron to reunite, and heat release is slow, thus effectively prevents molten iron temperature from reducing.And there is certain change slag, desulfurizing function in the process of heat release.The carbonization rice husk that described heat preserving agent preparation cost uses well below prior art, effectively reduces the cost of hot-metal insulating.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated, but limited the present invention never in any form, and any conversion done based on training centre of the present invention or replacement, all belong to protection scope of the present invention.
Biological powdered carbon of the present invention is heat preservation agent, described biological powdered carbon is mainly large sets the twig of pruning, also comprise some crops stalk, shell, wood powder sawdust, Pericarppium arachidis hypogaeae, bagasse or melon-seed hull, Herba Eupatorii Odorati etc. to obtain through charing, also can buy from market and obtain; Described charcoal powder footpath is≤2mm, and charcoal powder footpath is too small easily by absorption removing, and cause dust pollution, therefore particle diameter is unsuitable too small.
As preferably, the massfraction of biological powdered carbon is 68-75%.
Described vermiculite power is heat preserving agent, is bought and obtains, particle diameter≤1mm by market.
As preferably, the massfraction of vermiculite power is 6-12%.
Described power plant's cinder (flyash) is insulation dissolving agent, and technical scheme well known to those skilled in the art can be adopted to prepare voluntarily, also can be bought by market and obtain; Described power plant cinder particle diameter≤1mm.
As preferably, the massfraction of described power plant cinder is 6-12%.
Described unslaked lime is insulation sweetening agent, and particle diameter≤1mm, as preferably, the massfraction of unslaked lime is 8-15%.
Below in conjunction with specific embodiment, the present invention is further described:
The biological powdered carbon used in embodiment, vermiculite power, power plant's cinder and unslaked lime are bought from Yunnan Xin Kang Bioisystech Co., Ltd, peaceful Wei Jie Trade Co., Ltd., peaceful Green Dragon power station and elder brother's steel Longshan fusing agent ore company respectively and are obtained.
embodiment 1
Take the biological powdered carbon of 65kg, particle diameter≤2mm, 15kg vermiculite power, vermiculite power particle diameter≤1mm, 10kg power plant cinder (flyash), power plant cinder particle diameter≤1mm, mixer mixing put into by 10kg unslaked lime, be deposit after a packed bag sealing with 7 ~ 8kg after mixing, for subsequent use before configure post-tensioning to State of Blast Furnace, obtain the biomass combined heat preserving agent of molten iron.
Release complete backsight molten iron surface knot lid situation when molten iron and how much add the biomass combined heat preserving agent of molten iron, add-on is 0.45 ~ 0.60 kg/ ton, then hot metal transport is gone steel-making.
embodiment 2
Take the biological powdered carbon of 140kg, particle diameter≤2mm, 20kg vermiculite power, vermiculite power particle diameter≤1mm, 20kg power plant cinder, power plant cinder particle diameter≤1mm, mixer mixing put into by 20kg unslaked lime, be deposit after a packed bag sealing with 7 ~ 8kg after mixing, for subsequent use before prepare post-tensioning to State of Blast Furnace, obtain the biomass combined heat preserving agent of molten iron.
Release complete backsight molten iron surface knot lid situation when molten iron and how much add the biomass combined heat preserving agent of molten iron, add-on is 0.45 ~ 0.60kg/ton, then hot metal transport is gone steel-making.
embodiment 3
Take the biological powdered carbon of 75kg, particle diameter≤2mm, 7g vermiculite power, vermiculite power particle diameter≤1mm, 8kg power plant cinder, power plant cinder particle diameter≤1mm, mixer mixing put into by 10kg unslaked lime, be deposit after a packed bag sealing with 7 ~ 8kg after mixing, wine made of broomcorn millet system is for subsequent use before completing post-tensioning to State of Blast Furnace, the obtained biomass combined heat preserving agent of molten iron.
Release complete backsight molten iron surface knot lid situation when molten iron and how much add the biomass combined heat preserving agent of molten iron, add-on is 0.45 ~ 0.60 kg/ ton, then hot metal transport is gone steel-making.
Measure the molten iron temperature when ironmaking of above embodiment and steel-making respectively, result is as shown in table 1.
The heat insulation effect of table 1 biomass heat preserving agent
| Temperature (DEG C) when molten iron is released | Molten iron line duration (min) | Molten iron temperature (DEG C) during steel-making | Hot metal temperature drop (DEG C) | Temperature drop rate (DEG C/min) | Change slag (kg/ ton) | Desulfurization (%) | |
| Do not add heat preserving agent | 1416.3 | 101.5 | 1269.4 | 146.9 | 1.447 | / | / |
| Embodiment 1 | 1401 | 124 | 1268.5 | 132.5 | 1.069 | 10～15 | 0.01 |
| Embodiment 2 | 1420.5 | 120 | 1296 | 124.5 | 1.038 | 10～15 | 0.01 |
| Embodiment 3 | 1410 | 140.4 | 1277.5 | 132.5 | 0.944 | 10～15 | 0.01 |
As seen from Table 1, biomass combined heat preserving agent provided by the invention is more a lot of than the high insulating effect not adding heat preserving agent, and described biomass combined having of heat preserving agent slag desulfurizing function.
Claims (10)
1. the biomass combined heat preserving agent of molten iron, is characterized in that, calculate by weight percentage, and the biomass combined heat preserving agent of described molten iron comprises the biological powdered carbon of 65-75%, the vermiculite power of 5-15%, power plant's cinder of 5-15% and 5-15% unslaked lime.
2. the biomass combined heat preserving agent of molten iron as claimed in claim 1, is characterized in that, charcoal powder footpath≤2mm.
3. the biomass combined heat preserving agent of molten iron as claimed in claim 1, it is characterized in that, the massfraction of described biological powdered carbon is 68-75%.
4. the biomass combined heat preserving agent of molten iron as claimed in claim 1, is characterized in that, described vermiculite power particle diameter≤1mm.
5. the biomass combined heat preserving agent of molten iron as claimed in claim 1, it is characterized in that, the massfraction of described vermiculite power is 6-12%.
6. the biomass combined heat preserving agent of molten iron as claimed in claim 1, is characterized in that, described power plant cinder particle diameter≤1mm.
7. the biomass combined heat preserving agent of molten iron as claimed in claim 1, it is characterized in that, the massfraction of described power plant cinder is 6-12%.
8. the biomass combined heat preserving agent of molten iron as claimed in claim 1, it is characterized in that, the massfraction of described unslaked lime is 8-15%.
9. one kind as arbitrary in claim 1 to 8 as described in the preparation method of the biomass combined heat preserving agent of molten iron, it is characterized in that, take 65-75% biological powdered carbon, 5-15% vermiculite power, 5-15% power plant cinder and 5-15% unslaked lime to mix at 20-40 DEG C, seal and pack the rear obtained biomass combined heat preserving agent of molten iron.
10. one kind as arbitrary in claim 1 to 8 as described in the application of the biomass combined heat preserving agent of molten iron in hot-metal insulating, it is characterized in that, biomass combined for described molten iron heat preserving agent is joined in molten iron, in molten iron per ton, the biomass combined heat preserving agent add-on of described molten iron is 0. 3-0.7 kg/ ton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510498857.5A CN105018663A (en) | 2015-08-14 | 2015-08-14 | Molten iron biomass composite insulation agent and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510498857.5A CN105018663A (en) | 2015-08-14 | 2015-08-14 | Molten iron biomass composite insulation agent and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105018663A true CN105018663A (en) | 2015-11-04 |
Family
ID=54408961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510498857.5A Pending CN105018663A (en) | 2015-08-14 | 2015-08-14 | Molten iron biomass composite insulation agent and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105018663A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114568253A (en) * | 2022-01-21 | 2022-06-03 | 瑞派尔(宜昌)科技集团股份有限公司 | Anti-impact ecological planting particle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52139694A (en) * | 1976-05-18 | 1977-11-21 | Fukuoka Riken Kougiyou Kk | Methode of making granular heat insulator |
| WO1994019196A1 (en) * | 1993-02-19 | 1994-09-01 | Dynetics Engineering Corporation | Automatic embossed card package apparatus and method |
| CN1283533A (en) * | 2000-08-01 | 2001-02-14 | 郭玉华 | Grcular particles of insulating agent for molten steel and its preparing process |
| CN1952183A (en) * | 2006-11-17 | 2007-04-25 | 东北大学 | Composite metal-liquid thermal-insulating agent and method for preparing same |
| CN102296145A (en) * | 2011-10-08 | 2011-12-28 | 彭州市华泰冶金材料厂 | New application of fungus residue and heat-insulating covering agent for metallurgical industry |
| CN103173591A (en) * | 2013-03-07 | 2013-06-26 | 西安建筑科技大学 | Foundry ladle covering agent |
| CN104313212A (en) * | 2014-09-28 | 2015-01-28 | 四川德胜集团钒钛有限公司 | Molten iron heat preservation agent, preparation method of molten iron heat preservation agent and method for preserving temperature of molten iron |
-
2015
- 2015-08-14 CN CN201510498857.5A patent/CN105018663A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52139694A (en) * | 1976-05-18 | 1977-11-21 | Fukuoka Riken Kougiyou Kk | Methode of making granular heat insulator |
| WO1994019196A1 (en) * | 1993-02-19 | 1994-09-01 | Dynetics Engineering Corporation | Automatic embossed card package apparatus and method |
| CN1283533A (en) * | 2000-08-01 | 2001-02-14 | 郭玉华 | Grcular particles of insulating agent for molten steel and its preparing process |
| CN1952183A (en) * | 2006-11-17 | 2007-04-25 | 东北大学 | Composite metal-liquid thermal-insulating agent and method for preparing same |
| CN102296145A (en) * | 2011-10-08 | 2011-12-28 | 彭州市华泰冶金材料厂 | New application of fungus residue and heat-insulating covering agent for metallurgical industry |
| CN103173591A (en) * | 2013-03-07 | 2013-06-26 | 西安建筑科技大学 | Foundry ladle covering agent |
| CN104313212A (en) * | 2014-09-28 | 2015-01-28 | 四川德胜集团钒钛有限公司 | Molten iron heat preservation agent, preparation method of molten iron heat preservation agent and method for preserving temperature of molten iron |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114568253A (en) * | 2022-01-21 | 2022-06-03 | 瑞派尔(宜昌)科技集团股份有限公司 | Anti-impact ecological planting particle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104046773B (en) | A kind of dedusting steel-smelting converter ash produces cooled agglomerated pellet processing method | |
| CN106148686B (en) | Carbon-containing slag-inhibiting cold-bonded pellet and utilization method thereof | |
| WO2011029269A1 (en) | Method for innocuously treating chromium residue using metallurgical roasting and blast furnace | |
| CN101597662A (en) | A kind of method of producing direct-reduced iron | |
| CN101613798B (en) | Puddling additive and predation method thereof | |
| CN103725877B (en) | A kind of method that pneumatic steelmaking dust circulation utilizes | |
| CN106148684A (en) | The method and system of comprehensive utilization red mud | |
| CN104498672A (en) | Method for desulfurizing molten iron | |
| CN101229610A (en) | High strength, tenacity, and high welding speed hidden arc welding material for high class pipeline steel | |
| CN102534093A (en) | Control method of two-stage auxiliary material module in revolving furnace smelting process | |
| CN103540711B (en) | Method for simultaneously removing sulfur and phosphorus from semi-steel | |
| CN108396102A (en) | The method of electric furnace smelting special steel molten steel | |
| CN107557530A (en) | Molten iron heat-insulating agent taking dry quenching dust-removing ash as raw material and manufacturing and using methods thereof | |
| CN104673965A (en) | On-line molten steel slag modification method | |
| CN105018663A (en) | Molten iron biomass composite insulation agent and preparation method and application thereof | |
| CN103173592B (en) | Ladle covering agent prepared through utilizing blast furnace slag | |
| CN104313212B (en) | Molten iron heat preservation agent, preparation method of molten iron heat preservation agent and method for preserving temperature of molten iron | |
| CN102618694A (en) | Refining heat insulation covering agent and preparation method thereof | |
| CN101633970A (en) | Method for producing molten iron for casting by using medium frequency furnace and iron scrap | |
| CN107385127B (en) | Improve the process of vanadium titano-magnetite blast furnace process slag iron separation | |
| CN107574284A (en) | Molten iron heat preservation agent using metallurgical waste as raw material and manufacturing and using methods thereof | |
| CN104496230A (en) | Cement clinker and preparation method thereof | |
| CN207877601U (en) | A kind of system that melting nickel slag prepares forsterite | |
| CN102864270A (en) | Vanadium extraction cooling agent and preparation method thereof | |
| CN104087698B (en) | Pig iron carburization technique by coal-base direct reduction |
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: 20151104 |
|
| RJ01 | Rejection of invention patent application after publication |