CN102618686A - Technology for producing sponge iron by taking carbon-Lan as reducing agent - Google Patents
Technology for producing sponge iron by taking carbon-Lan as reducing agent Download PDFInfo
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- CN102618686A CN102618686A CN2012100821220A CN201210082122A CN102618686A CN 102618686 A CN102618686 A CN 102618686A CN 2012100821220 A CN2012100821220 A CN 2012100821220A CN 201210082122 A CN201210082122 A CN 201210082122A CN 102618686 A CN102618686 A CN 102618686A
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- blue charcoal
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Abstract
The invention discloses a technology for producing sponge iron by taking carbon-Lan as a reducing agent. The technology is characterized by comprising the following steps: 1), sorting: taking waste iron scale generated during the production of hot rolled band as a main raw material, wherein the content of iron is larger than 72 percent; 2), mixing: mixing carbon-Lan with stone ships, wherein the volume ratio of the carbon-Lan to the stone ships is (3 to 5) to (1 to 3); 3), drying: drying the carbon-Lan and the stone ships which are mixed proportionally with two dryers respectively; 4), crushing: crushing dried iron scale by a jaw crusher, crushing feed back of the jaw crusher with a high-speed grinder, and crushing the mixture of dried the carbon-Lan and the stone ships with the jaw crusher; 5), loading: loading the prepared raw materials into silicon carbide tanks, and arranging the silicon carbide tanks on a kiln car in groups: 6), reducing: pushing the kiln car loaded with the silicon carbide tanks into a full blast furnace gas tunnel kiln for reduction; and 7), warehousing finished products. As the carbon-Lan is taken as the reducing agent for producing sponge iron instead of coke breeze, the technology has the advantages that the production cost can be reduced, and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of technology of producing sponge iron, particularly utilize blue charcoal in overall height producer gas tunnel, to produce the method for sponge iron as reductive agent.
Background technology
Powder metallurgy is emerging high-tech industry of China's nineteen sixties, belongs to the high-tech project of country's 12 encourage growths.China produces sponge iron at present and generally adopts coke reduction steel scale of steel rolling technology, and the production cycle is long, and cost is high.And along with the rising steadily of coke price, cost has seriously restricted the development of iron-based powder industry in continuous rising in recent years.Therefore, research substitutes coke and carries out the reductive raw material, reduces the sponge iron production cost, and increasing work efficiency is the problem that present technique need solve.
Summary of the invention
It is too high that the object of the invention is to overcome present coke cost, and a kind of novel process of utilizing blue charcoal in overall height producer gas tunnel, to produce sponge iron as reductive agent is provided, and can effectively reduce production costs, and improves output.
For reaching above purpose, the technical scheme that the present invention taked is to be accomplished by following step:
1) select materials: select for use the waste iron scale of producing the steel band generation on the hot rolled strip production line as main raw material, iron level is more than 72%;
2) batch mixing: blue charcoal and aggregate chips are even according to the mixed of volume ratio 3-5: 1-3;
3) raw material stoving: iron scale and the blue charcoal for preparing in proportion and aggregate chips are dried with two dryers respectively;
4) raw material crushing: after iron scale after the oven dry adopts the jaw crushing crusher machine, with high speed disintegrator the feed back of jaw crusher is carried out secondary breaking again; The blue charcoal after the oven dry and the mixture of aggregate chips utilize jaw crusher to carry out fragmentation;
5) entrucking: with the raw material of getting ready the carborundum jar of packing into, the silit jar is arranged on kiln car by group;
6) reduce: the kiln car that installs is pushed in the overall height producer gas tunnel reduce;
7) finished product warehouse-in: the good kiln car that will reduce is pushed into unloading deck and unloads, and the sponge iron of kiln discharge is cleaned warehouse-in with water.
Described blue carbon feedstock carbon content mixes back fixed carbon content greater than 50% greater than 75% with aggregate chips.
The end sieve sieve aperture that described jaw crusher and high speed pulverization crusher machine iron scale adopt is 6mm; The end sieve sieve aperture that the jaw crusher of broken blue charcoal and aggregate chips mixture adopts is 12mm.
Iron scale granularity after described oven dry and the fragmentation reaches all through 20 eye mesh screens and-40 order>=70%; Iron scale moisture≤1%, loose density>=2.45, blue charcoal mixes the broken back of oven dry moisture≤4% with aggregate chips; Fixed carbon 50%～55%, blue charcoal and aggregate chips granularity≤3mm.
Four every group in described silit jar, totally 20 groups of each kiln cars.
Advanced once in the every 80-130 of described kiln car minute, recovery time 30-50 hour, 1140 ℃ ± 25 ℃ of reduction temperatures.
Beneficial effect of the present invention is: replace breeze to produce sponge iron as reductive agent with blue charcoal, can reduce production costs, enhance productivity.
Following table has provided the data contrast table that adopts the present invention and original working method
Embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment 1:
A kind of technology of utilizing blue charcoal to make reductive agent production sponge iron is accomplished by following step:
1) select materials: select for use the waste iron scale of producing the steel band generation on the hot rolled strip production line as main raw material, iron level is more than 72%;
2) batch mixing: blue charcoal and aggregate chips are even according to 3.5: 2.5 mixed of volume ratio;
3) raw material stoving: iron scale and the blue charcoal for preparing in proportion and aggregate chips are dried with two dryers respectively;
4) raw material crushing: after iron scale after the oven dry adopts the jaw crushing crusher machine, with high powder machine the feed back of jaw crusher is carried out secondary breaking again; The blue charcoal after the oven dry and the mixture of aggregate chips utilize jaw crusher to carry out fragmentation;
5) entrucking: with the raw material of getting ready the silit jar of packing into, the silit jar is arranged on kiln car by group;
6) reduce: the kiln car that installs is pushed in the overall height producer gas tunnel reduce;
7) finished product warehouse-in: the good kiln car that will reduce is pushed into unloading deck and unloads, and the sponge iron of kiln discharge is cleaned warehouse-in with water.
Described blue carbon feedstock carbon content mixes back fixed carbon content greater than 50% greater than 75% with aggregate chips.
The end sieve sieve aperture that described jaw crusher and high speed pulverization crusher machine iron scale adopt is 6mm; The end sieve sieve aperture that the jaw crusher of broken blue charcoal and aggregate chips mixture adopts is 12mm.
Iron scale granularity after described oven dry and the fragmentation reaches all through 20 eye mesh screens and-40 order>=70%; Iron scale moisture≤1%, loose density>=2.45, blue charcoal mixes the broken back of oven dry moisture≤4% with aggregate chips; Fixed carbon 50%～55%, blue charcoal and aggregate chips granularity≤3mm.
Four every group in described silit jar, totally 20 groups of each kiln cars.
Described kiln car advanced once 40 hours recovery times, 1140 ℃ ± 5 ℃ of reduction temperatures in per 90 minutes.
Embodiment 2:
Laiwu Taidong Powder Technology Co., Ltd. uses the present invention on 86 meters overall height producer gas tunnel, to produce sponge iron, implementation step 1), 3), 4), 5), 6), 7) with embodiment 1, step 2 just) batch mixing:
Blue charcoal and aggregate chips are even according to 5: 2 mixed of volume ratio.
Described kiln car advanced once 50 hours recovery times, 1140 ℃ ± 15 ℃ of reduction temperatures in per 120 minutes
Described silit jar diameter 400mm, high 400mm, quartet vertically are assembled on the kiln car, and be high 1.6 meters, and harness iron scale layer thickness is 40mm, and harness is high 1.5 meters, and material is a stainless steel.
Main technical details such as following table
Embodiment 3:
A kind ofly utilize blue charcoal to make the technology that reductive agent is produced sponge iron, implementation step 1), 3), 4), 5), 6), 7) with embodiment 1, step 2 just) batch mixing: blue charcoal and aggregate chips are even according to 4: 1.5 mixed of volume ratio.
The end sieve sieve aperture that described jaw crushing crusher machine iron scale adopts is 6mm; The sieve sieve aperture is 6mm at the bottom of the high speed disintegrator, and the end sieve sieve aperture that the jaw crusher of broken blue charcoal and aggregate chips mixture adopts is 12mm.
Described kiln car advanced once 45 hours recovery times, 1140 ℃ ± 20 ℃ of reduction temperatures in per 110 minutes.
Claims (6)
1. one kind is utilized blue charcoal to make the technology that reductive agent is produced sponge iron, it is characterized in that being accomplished by following step:
1) select materials: select for use the waste iron scale of producing the steel band generation on the hot rolled strip production line as main raw material, iron level is more than 72%;
2) batch mixing: blue charcoal and aggregate chips are even according to the mixed of volume ratio 3-5: 1-3;
3) raw material stoving: iron scale and the blue charcoal for preparing in proportion and aggregate chips are dried with two dryers respectively;
4) raw material crushing: after iron scale after the oven dry adopts the jaw crushing crusher machine, with high speed disintegrator the feed back of jaw crusher is carried out secondary breaking again; The blue charcoal after the oven dry and the mixture of aggregate chips utilize jaw crusher to carry out fragmentation;
5) entrucking: with the raw material of getting ready the carborundum jar of packing into, the silit jar is arranged on kiln car by group;
6) reduce: the kiln car that installs is pushed in the overall height producer gas tunnel reduce;
7) finished product warehouse-in: the good kiln car that will reduce is pushed into unloading deck and unloads, and the sponge iron of kiln discharge is cleaned warehouse-in with water.
2. a kind of technology of utilizing blue charcoal to make reductive agent production sponge iron according to claim 1 is characterized in that blue carbon feedstock carbon content greater than 75%, mixes back fixed carbon content with aggregate chips greater than 50%.
3. a kind of technology of utilizing blue charcoal to make reductive agent production sponge iron according to claim 1 is characterized in that the end sieve sieve aperture that jaw crusher and high speed pulverization crusher machine iron scale adopt is 6mm; The end sieve sieve aperture that the jaw crusher of broken blue charcoal and aggregate chips mixture adopts is 12mm.
4. a kind of technology of utilizing blue charcoal to make reductive agent production sponge iron according to claim 1; It is characterized in that drying and fragmentation after the iron scale granularity reach all through 20 eye mesh screens and-40 order>=70%; Iron scale moisture≤1%, loose density>=2.45, blue charcoal mixes the broken back of oven dry moisture≤4% with aggregate chips; Fixed carbon 50%～55%, blue charcoal and aggregate chips granularity≤3mm.
5. a kind of technology of utilizing blue charcoal to make reductive agent production sponge iron according to claim 1 is characterized in that four every group in silit jar, totally 20 groups of each kiln cars.
6. a kind of technology of utilizing blue charcoal to make reductive agent production sponge iron according to claim 1 is characterized in that propelling in the every 80-130 of kiln car minute once, recovery time 30-50 hour, and 1140 ℃ ± 25 ℃ of reduction temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100821220A CN102618686A (en) | 2012-03-18 | 2012-03-18 | Technology for producing sponge iron by taking carbon-Lan as reducing agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100821220A CN102618686A (en) | 2012-03-18 | 2012-03-18 | Technology for producing sponge iron by taking carbon-Lan as reducing agent |
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| CN102618686A true CN102618686A (en) | 2012-08-01 |
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| CN2012100821220A Pending CN102618686A (en) | 2012-03-18 | 2012-03-18 | Technology for producing sponge iron by taking carbon-Lan as reducing agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436698A (en) * | 2013-08-23 | 2013-12-11 | 徐伟 | Method for directly reducing laterite-nickel ore to produce ferronickel alloy |
| CN111321264A (en) * | 2020-04-02 | 2020-06-23 | 北票新正粉末冶金有限公司 | Preparation method of sponge iron |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558305A (en) * | 1978-10-26 | 1980-05-01 | Kawasaki Steel Corp | Production of iron powder of superior machinability |
| JPH022941B2 (en) * | 1981-09-22 | 1990-01-19 | Kubota Ltd | |
| CN1346723A (en) * | 2001-10-12 | 2002-05-01 | 清华大学 | Process for preparing Fe alloy powder by reducing Fe scales generated by rolling steel and Fe concentrate |
| CN1410552A (en) * | 2002-11-25 | 2003-04-16 | 莱芜钢铁集团粉末冶金有限公司 | Low apparent density reduction iron powder and its manufacturing method |
| US20030110889A1 (en) * | 2001-02-14 | 2003-06-19 | Satoshi Uenosono | Method for producing sponge iron, and reduced iron powder and method for production thereof |
| CN1624160A (en) * | 2004-12-10 | 2005-06-08 | 李增元 | Sponge iron ocntained nickle and its preparation process, process for producing nickle alloy steel blank |
| CN1640560A (en) * | 2004-01-02 | 2005-07-20 | 宝钢集团上海梅山有限公司 | Rollscale impurity-removing system and process |
| CN1814833A (en) * | 2005-02-04 | 2006-08-09 | 甘肃省电力工业局白银供电局 | Method for smelting iron-oxide scale to produce ferro-silicon alloy |
| JP4022941B2 (en) * | 1997-06-27 | 2007-12-19 | 住友金属工業株式会社 | Method for forming reduced iron production raw material |
-
2012
- 2012-03-18 CN CN2012100821220A patent/CN102618686A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5558305A (en) * | 1978-10-26 | 1980-05-01 | Kawasaki Steel Corp | Production of iron powder of superior machinability |
| JPH022941B2 (en) * | 1981-09-22 | 1990-01-19 | Kubota Ltd | |
| JP4022941B2 (en) * | 1997-06-27 | 2007-12-19 | 住友金属工業株式会社 | Method for forming reduced iron production raw material |
| US20030110889A1 (en) * | 2001-02-14 | 2003-06-19 | Satoshi Uenosono | Method for producing sponge iron, and reduced iron powder and method for production thereof |
| CN1346723A (en) * | 2001-10-12 | 2002-05-01 | 清华大学 | Process for preparing Fe alloy powder by reducing Fe scales generated by rolling steel and Fe concentrate |
| CN1410552A (en) * | 2002-11-25 | 2003-04-16 | 莱芜钢铁集团粉末冶金有限公司 | Low apparent density reduction iron powder and its manufacturing method |
| CN1640560A (en) * | 2004-01-02 | 2005-07-20 | 宝钢集团上海梅山有限公司 | Rollscale impurity-removing system and process |
| CN1624160A (en) * | 2004-12-10 | 2005-06-08 | 李增元 | Sponge iron ocntained nickle and its preparation process, process for producing nickle alloy steel blank |
| CN1814833A (en) * | 2005-02-04 | 2006-08-09 | 甘肃省电力工业局白银供电局 | Method for smelting iron-oxide scale to produce ferro-silicon alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436698A (en) * | 2013-08-23 | 2013-12-11 | 徐伟 | Method for directly reducing laterite-nickel ore to produce ferronickel alloy |
| CN111321264A (en) * | 2020-04-02 | 2020-06-23 | 北票新正粉末冶金有限公司 | Preparation method of sponge iron |
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Application publication date: 20120801 |