CN104745970A - Hot press iron briquette - Google Patents
Hot press iron briquette Download PDFInfo
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- CN104745970A CN104745970A CN201510167887.8A CN201510167887A CN104745970A CN 104745970 A CN104745970 A CN 104745970A CN 201510167887 A CN201510167887 A CN 201510167887A CN 104745970 A CN104745970 A CN 104745970A
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Abstract
The invention relates to a hot press iron briquette, and relates to the technical field of metallurgical industry. The technical scheme of the invention is that the hot press iron briquette is a cylindrical body, a cuboid, a cube or a sphere. The iron briquette comprises the following chemical components in percentage by mass: no more than 2.50% of C, no more than 1.40% of Mn, no more than 0.070% of S, no more than 0.150% of P, no more than 0.70% of Si, no less than 90% of TFe, and the balance of inevitable impurities. The apparent density of the iron briquette is no lower than 5.0t/m<3>. According to the invention, raw materials are subjected to magnetic separation, screening and washing, and are well mixed; the mixture is heated; the heated mixture is distributed to a hot-press machine and is subjected to hot-press molding; and the molded iron briquette is naturally cooled. The iron briquette provided by the invention has the advantages of wide raw material selection range, low purchasing cost, and low heating temperature. According to the invention, finished product oxidation degree is reduced, and energy is saved. Impurities are removed from the material, such that the purpose of further purification is achieved, and product quality is improved.
Description
Technical field
The present invention relates to a kind of briquette iron by hot molding, especially steel-making cooling cold burden briquette iron by hot molding, belongs to metallurgy industry technical field of steel production.
Background technology
Metallurgy industry, steel-making cooling cold burden generally adopts steel scrap, pig, sponge iron, reduced iron, when steel scrap, pig resource anxiety, can also adopt agglomerate, pellet, lump ore, dirt mud briquetting.Wherein pig mainly utilizes useless time iron casting to form.
Adopt steel scrap as steel-making cooling cold burden, one is that scrap resources is nervous, and two is that steel scrap size separation comparatively bothers, and not easily enters stove.
Adopt pig, sponge iron, reduced iron as steel-making cooling cold burden, because needing a large amount of slag making, increase lime consumption and the quantity of slag, metal loss is serious.
Adopt agglomerate, pellet, lump ore, dirt mud briquetting as steel-making cooling cold burden, fume amount can be made to strengthen, easily cause environmental pollution and energy dissipation.
Chinese Patent Application No. 201310556215.7, disclose a kind of steel-making cooling cold burden and preparation method thereof, this steel-making is lowered the temperature cold burden, in right cylinder or rectangular parallelepiped or square or spheroid, chemical composition mass percent: C :≤1.2%, Mn :≤1.4%, S :≤0.045%, P :≤0.045%, Si :≤0.7%, TFe:>=92%, other is inevitable impurity, apparent density:>=5.0t/m
3.
The preparation method of this steel-making cooling cold burden, comprises following processing step:
(1) raw material: slag is after magnetic separation, screening, and its chemical composition mass percent is: C :≤1.2%, Mn :≤1.4%, S :≤0.045%, P :≤0.045%, Si :≤0.7%, TFe: >=92%, and other is inevitable impurity, and granularity is less than 60mm;
(2) above-mentioned raw materials is put into high temperature kiln and carry out pre-burning, calcined temperature: 200-300oC, be incubated 8-15 minutes;
(3) raw material after pre-burning is heated in high temperature kiln, Heating temperature: 800-1100 oC;
(4) above-mentioned raw materials will heated, is transported to thermal pressure forming machine and carries out thermoforming, mold temperature: 700-1000 oC, forming pressure: 950-1100t.
There is following shortcoming in above-mentioned steel-making cooling cold burden and preparation method thereof:
(1) material composition requires strict, and range of choice is narrow, Raw material processing complex process.Raw material is only limitted to adopt slag to make raw material after magnetic separation, screening, and range of choice is narrow.S in raw material :≤0.045% and P :≤0.045%, cause procurement price more and more higher, product cost raises;
(2) Heating temperature of raw material is 800-1100 oC, and Heating temperature is high, causes energy consumption high;
(3) raw material preheating in high temperature kiln, insulation, heating, heat-up time is long, and production efficiency is low.And raw material is in static thermal histories all the time.Raw material is easily heated irregular, and surface oxidation degree is higher, and directly impact steel-making cooling cold burden is shaping, and product fragment is more, reduces quality product.
Summary of the invention
The object of the invention is to provide a kind of briquette iron by hot molding, utilization steel-making splashings, ironmaking splashings, iron cement waste material or other iron-containing waste make raw material, be thermally processed into right cylinder or rectangular parallelepiped or square or spheroid, as steel-making cooling cold burden, expand material choice scope, reduce raw materials cost, reduce energy consumption, solve Problems existing in background technology.
The technical scheme of this practicality invention is:
A kind of briquette iron by hot molding, its chemical composition mass percent: C :≤2.50%, Mn :≤1.40%, S :≤0.070%, P :≤0.150%, Si :≤0.70%, TFe: >=90%, other is inevitable impurity.
Above-mentioned briquette iron by hot molding is right cylinder or rectangular parallelepiped or square or spheroid, apparent density:>=5.0t/m
3.
This briquette iron by hot molding is molded by following process heat:
(1) steel-making splashings, ironmaking splashings, iron cement waste material wherein one or more are adopted to be combined into raw material, this material chemical component mass percent is: C :≤2.50%, Mn :≤1.40%, S :≤0.070%, P :≤0.150%, Si :≤0.70%, TFe: >=90%, other is inevitable impurity, and granularity is less than 60mm;
(2) above-mentioned raw materials is put into rotary kiln to heat;
(3) by the above-mentioned raw materials after heating, hot-forming by heat pressing forming machines;
(4) shaping rear naturally cooling.
Preferred version: above-mentioned briquette iron by hot molding, its chemical composition mass percent: C :≤2.50%, Mn :≤1.40%, S≤0.070%, P≤0.150%, Si :≤0.70%, TFe:>=90%, other inevitable impurity, apparent density: 5.6-6.5t/m
3.
Described step (1) raw material, after magnetic separation, screening, washing, mixes, and it is chemical composition mass percent: C :≤2.50%, Mn :≤1.40% years old, S :≤0.070%, P :≤0.150%, Si :≤0.70%, TFe: >=90%, other is inevitable impurity, and granularity is less than 60mm;
Described step (2) heating raw materials temperature: 600-800 oC;
Described step (3) hot-forming temperature: 550-750 oC, forming pressure: 1200-1650t.
Described steel-making splashings and ironmaking splashings refer to metallurgy industry steel-making or iron manufacturing process in, splash material out, or steel-making or ironmaking after slag or scum.
Raw material adopts rotary kiln heating, and rotary kiln, under the driving of swivel arrangement, by certain rotational speed, makes raw material constantly overturn in rotary kiln, is heated evenly.Meanwhile, rotary kiln and horizontal plane are provided with angle, and kiln tail is higher than kiln hood, and raw material is mobile by deadweight from kiln Caudad kiln hood.Burner carries out torch firing from kiln hood to kiln tail direction with the high temperature of 700-1000 degree, and partial impurities is brought into settling pocket precipitation by kiln tail air inducing, and part kiln tail waste heat absorbs through interchanger and produces hot water, to plant area's heating and bathing.Rotary kiln heat waste is little, and Heating temperature is low, reduces finished product degree of oxidation, has saved the energy, eliminates the impurity in material, thus reaches the object of purifying further, improves the quality of products.
The invention has the beneficial effects as follows:
(1) raw material can adopt steel-making splashings, ironmaking splashings, iron cement waste material or other iron-containing waste, and material choice scope is wide, and purchase cost is low, per tonly falls 100-150 unit;
(2) raw material adopts rotary kiln heating, and in rotary kiln, raw material overturns with the rotation of kiln body, is heated evenly.Meanwhile, rotary kiln heat waste is little, and Heating temperature is low, reduces finished product degree of oxidation, has saved the energy, eliminates the impurity in material, thus reaches the object of purifying further, improves the quality of products;
(3) product fragment reduces, and formed product qualification rate can reach more than 98%;
(4) enhance productivity, improve product.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is rotary kiln swivel arrangement schematic diagram of the present invention;
Fig. 3 is rotary kiln bracing or strutting arrangement schematic diagram of the present invention;
In figure: raw material cabin 1, weighing belt conveyor 2, lift 3, tremie pipe 4, interchanger 5, kiln body supporting device 6, kiln body 7, kiln body swivel arrangement 8, burner 9, material guiding pipe 10, tripper 11, heat pressing forming machines 12, settling pocket 13, finished product conveyer 14, back up pad 15, bull gear 16, gear ring 17, drive-motor 18, wheel belt 19, support roller station 20.
Embodiment
Below in conjunction with accompanying drawing, by example, the invention will be further described.
A kind of briquette iron by hot molding, in right cylinder or rectangular parallelepiped or square or spheroid, chemical composition mass percent is in table 1;
This briquette iron by hot molding is molded by following process heat:
(1) one or more are combined into raw material to adopt steel-making splashings, ironmaking splashings, iron cement waste material, and after magnetic separation, screening, washing, mix, its chemical composition mass percent is in table 1;
(2) above-mentioned raw materials is put into rotary kiln to heat, Heating temperature is in table 1;
(3) above-mentioned raw materials will heated, hot-forming to heat pressing forming machines by tripper, mold temperature and forming pressure are in table 1;
(4) shaping rear naturally cooling.
In an embodiment, this briquette iron by hot molding is made by special hot pressing forming production line.With reference to accompanying drawing 1-3, briquette iron by hot molding special hot pressing forming production line, comprise feeding system, rotary kiln, batch turning feeding-distribution device, burner 9, heat pressing forming machines 12 and finished product conveyer 14, rotary kiln is provided with feeding system, rotary kiln end is provided with batch turning feeding-distribution device and burner 9, and guide feeding-distribution device rear is provided with heat pressing forming machines 12 and finished product conveyer 14 successively;
Described rotary kiln comprises kiln body supporting device 6, kiln body 7 and kiln body swivel arrangement 8, kiln body 7 and horizontal plane are provided with angle, one end higher than horizontal plane is kiln tail, subhorizontal one end is kiln hood, kiln body 7 is provided with kiln body supporting device 6 and kiln body swivel arrangement 8, and described kiln body swivel arrangement 8 comprises bull gear 16 and little gear ring, and bull gear 16 is fixed on outside kiln body 7, bull gear 16 engages with little gear ring, and little gear ring is connected with drive-motor 18 by step-down gear;
Described guide feeding-distribution device comprises material guiding pipe 10 and tripper 11, and material guiding pipe 10 one end is communicated with the kiln body 7 in rotary kiln, and the other end is communicated with tripper 11, and tripper 11 rear is provided with heat pressing forming machines 12.
In the present embodiment, the hot-forming production line of briquette iron by hot molding, also comprises interchanger 5 and settling pocket 13 in composition, interchanger 5 and settling pocket 13 are located at rotary kiln, and interchanger 5 is positioned at above kiln body 7, and settling pocket 13 is positioned at below kiln body 7.
Described rotary kiln end is also provided with sealing surge bunker, and material guiding pipe 10 is communicated with sealing surge bunker.
Described feeding system comprises raw material cabin 1, weighing belt conveyor 2, lift 3 and tremie pipe 4, raw material cabin 1 is located on weighing belt conveyor 2, weighing belt conveyor 2 is connected with lift 3, and tremie pipe 4 one end is located on lift 3, and the other end is communicated with the kiln body 7 in rotary kiln.
Raw material adopts steel-making splashings, slag produced from steel-smelting, ironmaking splashings, ironmaking scum, iron cement waste material or other iron-containing waste, after magnetic separation, washing, mix and add raw material cabin 1, after weighing belt conveyor 2 carries out accurate-metering to it, again through lift 3 cross tremie pipe 4 enter in rotary kiln body 7, rotary kiln body 7 under the driving of rotary kiln body swivel arrangement, by certain rotational speed, raw material is constantly overturn in rotary kiln, is heated evenly.Meanwhile, because kiln body 7 and horizontal plane are provided with angle, kiln tail is higher than kiln hood, and raw material moves from kiln Caudad kiln hood.Burner carries out torch firing from kiln hood to kiln tail direction with the high temperature of 700-1000 degree, and partial impurities is brought into settling pocket 13 by kiln tail air inducing and precipitated, and part kiln tail waste heat absorbs through interchanger 5 and produces hot water, to plant area's heating and bathing.Heating raw materials temperature 700-900 degree, and put into kiln hood sealing surge bunker, after heat pressing forming machines 12 compression moulding delivered to by material guiding pipe 10, tripper 11, be delivered to finished product stock ground through finished product conveyer 14, obtain briquette iron by hot molding, use as steel-making cooling cold burden.Briquette iron by hot molding is right cylinder, its chemical composition mass percent: C :≤2.50%, Mn :≤1.40%, S :≤0.070%, P :≤0.150%, Si :≤0.70%, TFe:>=90%, other is inevitable impurity, apparent density:>=5.0t/m
3.
Adopt the present invention, compared with background technology:
(1) material choice scope is wide, and purchase cost is low, per tonly falls 100-150 unit;
(2) raw material is heated evenly, and heat waste is little, and Heating temperature is low 200-300 oC on average, reduces finished product degree of oxidation, has saved the energy, eliminates the impurity in material, thus reaches the object of purifying further, improves the quality of products;
(3) product fragment reduces, and formed product qualification rate brings up to more than 98% by 90%;
(4) enhance productivity, improve product.
Claims (4)
1. a briquette iron by hot molding, is characterized in that: briquette iron by hot molding chemical composition mass percent: C :≤2.50%, Mn :≤1.40%, S :≤0.070%, P :≤0.150%, Si :≤0.70%, TFe: >=90%, and other is inevitable impurity.
2. briquette iron by hot molding according to claim 1, is characterized in that: briquette iron by hot molding is right cylinder or rectangular parallelepiped or square or spheroid, apparent density:>=5.0t/m
3.
3. briquette iron by hot molding according to claim 1 and 2, is characterized in that:
This briquette iron by hot molding is molded by following process heat:
(1) steel-making splashings, ironmaking splashings, iron cement waste material wherein one or more are adopted to be combined into raw material, this material chemical component mass percent is: C :≤2.50%, Mn :≤1.40%, S :≤0.070%, P :≤0.150%, Si :≤0.70%, TFe: >=90%, other is inevitable impurity, and granularity is less than 60mm;
(2) above-mentioned raw materials is put into rotary kiln to heat;
(3) by the above-mentioned raw materials after heating, hot-forming by heat pressing forming machines;
(4) shaping rear naturally cooling.
4. briquette iron by hot molding according to claim 3, is characterized in that:
Briquette iron by hot molding chemical composition mass percent: C :≤2.50%, Mn :≤1.40%, S≤0.070%, P≤0.150%, Si :≤0.70%, TFe:>=90%, other inevitable impurity, apparent density: 5.6-6.5t/m
3;
Described step (1) raw material, after magnetic separation, screening, washing, mixes, and it is chemical composition mass percent: C :≤2.50%, Mn :≤1.40% years old, S :≤0.070%, P :≤0.150%, Si :≤0.70%, TFe: >=90%, other is inevitable impurity, and granularity is less than 60mm;
Described step (2) heating raw materials temperature: 600-800 oC;
Described step (3) hot-forming temperature: 550-750 oC, forming pressure: 1200-1650t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167887.8A CN104745970A (en) | 2015-04-10 | 2015-04-10 | Hot press iron briquette |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167887.8A CN104745970A (en) | 2015-04-10 | 2015-04-10 | Hot press iron briquette |
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| CN104745970A true CN104745970A (en) | 2015-07-01 |
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| CN201510167887.8A Pending CN104745970A (en) | 2015-04-10 | 2015-04-10 | Hot press iron briquette |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903320A (en) * | 2017-04-25 | 2017-06-30 | 唐山鑫虎重型矿山机械有限公司 | With the equipment of the hot-forming metallurgical raw material metal bloom of waste metal rubbish |
| CN107775000A (en) * | 2017-10-16 | 2018-03-09 | 宣城市华菱精工科技股份有限公司 | A kind of high specific gravity is to pouring weight hot press forming technology |
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| EP2703513A1 (en) * | 2011-04-28 | 2014-03-05 | Kabushiki Kaisha Kobe Seiko Sho | Hot press molded article, fabrication method therefor, and thin steel plate for hot press molding |
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Patent Citations (6)
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| CN1704488A (en) * | 2004-05-28 | 2005-12-07 | 上海宝钢国际经济贸易有限公司 | Hot-pressing slab powder press-ball production method |
| CN101528952A (en) * | 2006-11-16 | 2009-09-09 | 株式会社神户制钢所 | Briquette iron by hot molding and process for producing the same |
| CN102232123A (en) * | 2008-09-18 | 2011-11-02 | 国立大学法人冈山大学 | Hot-pressed steel plate member and manufacturing method therefor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106903320A (en) * | 2017-04-25 | 2017-06-30 | 唐山鑫虎重型矿山机械有限公司 | With the equipment of the hot-forming metallurgical raw material metal bloom of waste metal rubbish |
| CN107775000A (en) * | 2017-10-16 | 2018-03-09 | 宣城市华菱精工科技股份有限公司 | A kind of high specific gravity is to pouring weight hot press forming technology |
| CN107775000B (en) * | 2017-10-16 | 2019-04-23 | 宣城市华菱精工科技股份有限公司 | A kind of pair of pouring weight hot press forming technology |
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