CN104762550A - Hot-press molding process for hot-press briquette - Google Patents
Hot-press molding process for hot-press briquette Download PDFInfo
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Abstract
The invention relates to a hot-press molding process for hot-press briquette, and belongs to the technical field of metallurgical industry. According to the technical scheme, the hot-press molding process comprises the following steps: performing magnetic separation on raw materials, screening, washing with water, uniformly mixing, heating the raw materials at 600-800 DEG C, performing hot-press molding on the heated raw materials by using a distributor through a hot-press molding machine at 550-750 DEG C under the pressure of 1200-1650t, and naturally cooling after molding, wherein the raw materials comprise the following chemical components in percentage by mass: less than or equal to 2.50% of C, less than or equal to 1.40% of Mn, less than or equal to 0.070% of S, less than or equal to 0.150% of P, less than or equal to 0.70% of Si, greater than or equal to 90% of TFe, and other inevitable impurities. The hot-press molding process has the beneficial effects that the raw material selection range is wide, the purchase cost is low, the heating temperature is low, the oxidation degree of the finished product can be reduced, the energy can be saved, impurities in the materials can be reduced, the purpose of further purification can be achieved, and the product quality can be improved.
Description
Technical field
The present invention relates to a kind of briquette iron by hot molding hot press forming technology, belong 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 hot press forming technology, 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 hot press forming technology, comprises following processing step:
(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, obtain briquette iron by hot molding, this briquette iron by hot molding is right cylinder or rectangular parallelepiped or square or spheroid, 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.
In above-mentioned briquette iron by hot molding hot press forming technology:
Described step (1) raw material is after magnetic separation, screening, washing, and after mixing, 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;
Briquette iron by hot molding chemical composition mass percent in described step (4): 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 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.
Embodiment
Below by way of example, the invention will be further described.
A kind of briquette iron by hot molding hot press forming technology, comprises following processing step:
(1) adopt steel-making splashings, ironmaking splashings, iron cement waste material wherein one or more to be arbitrarily made with raw material, raw material, after magnetic separation, screening, washing, mixes, and 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) by the above-mentioned raw materials after heating, hot-forming to heat pressing forming machines by tripper, mold temperature and forming pressure are in table 1;
(4) shaping rear naturally cooling, obtains briquette iron by hot molding, and this briquette iron by hot molding is right cylinder or rectangular parallelepiped or square or spheroid, and chemical composition mass percent is in table 1.
In an embodiment, raw material is after magnetic separation, washing, mix and add raw material cabin, after weighing belt conveyor carries out accurate-metering to it, crossing tremie pipe through lift again enters in rotary kiln, rotary kiln under the driving of swivel arrangement, by certain rotational speed, raw material is constantly overturn in rotary kiln, is heated evenly.Meanwhile, rotary kiln is in being in tilted layout, 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.Kiln hood sealing surge bunker put into by raw material after going out kiln hood, after heat pressing forming machines compression moulding delivered to by material guiding pipe, tripper, be delivered to finished product stock ground, obtain briquette iron by hot molding through finished product iron block conveyer, uses as steel-making cooling cold burden.
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 (2)
1. a briquette iron by hot molding hot press forming technology, is characterized in that comprising following processing step:
(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, obtain briquette iron by hot molding, this briquette iron by hot molding is right cylinder or rectangular parallelepiped or square or spheroid, 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.
2. briquette iron by hot molding hot press forming technology according to claim 1, is characterized in that:
Described step (1) raw material is after magnetic separation, screening, washing, and after mixing, 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;
Briquette iron by hot molding chemical composition mass percent in described step (4): 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510167894.8A CN104762550A (en) | 2015-04-10 | 2015-04-10 | Hot-press molding process for hot-press briquette |
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| CN201510167894.8A CN104762550A (en) | 2015-04-10 | 2015-04-10 | Hot-press molding process for hot-press briquette |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369123A (en) * | 2015-11-13 | 2016-03-02 | 浙江荣鑫带钢有限公司 | Strip steel preparing method for blade |
| 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 |
| CN111893296A (en) * | 2020-09-10 | 2020-11-06 | 山东众亿赫贸易有限公司 | Hot-pressing scrap steel recarburization method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004052066A (en) * | 2002-07-23 | 2004-02-19 | Daido Steel Co Ltd | R-Fe-B BASED MAGNET AND METHOD OF PRODUCING THE SAME |
| CN101701314A (en) * | 2009-11-06 | 2010-05-05 | 江苏欧赛德钢涂有限公司 | Steel bar for high-strength stirrup and preparation method thereof |
| CN103614616A (en) * | 2013-11-12 | 2014-03-05 | 唐山曹妃甸区通鑫再生资源回收利用有限公司 | Steel-making cooling cold material-remelted steel and preparation method thereof |
-
2015
- 2015-04-10 CN CN201510167894.8A patent/CN104762550A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004052066A (en) * | 2002-07-23 | 2004-02-19 | Daido Steel Co Ltd | R-Fe-B BASED MAGNET AND METHOD OF PRODUCING THE SAME |
| CN101701314A (en) * | 2009-11-06 | 2010-05-05 | 江苏欧赛德钢涂有限公司 | Steel bar for high-strength stirrup and preparation method thereof |
| CN103614616A (en) * | 2013-11-12 | 2014-03-05 | 唐山曹妃甸区通鑫再生资源回收利用有限公司 | Steel-making cooling cold material-remelted steel and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105369123A (en) * | 2015-11-13 | 2016-03-02 | 浙江荣鑫带钢有限公司 | Strip steel preparing method for blade |
| 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 |
| CN111893296A (en) * | 2020-09-10 | 2020-11-06 | 山东众亿赫贸易有限公司 | Hot-pressing scrap steel recarburization method and device |
| CN111893296B (en) * | 2020-09-10 | 2024-03-29 | 山西通才工贸有限公司 | Hot-pressed scrap steel carburetion method and device thereof |
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