CN1176858A - Method and equipment for prodn. of continuous casting protective slag material by tower furnace - Google Patents
Method and equipment for prodn. of continuous casting protective slag material by tower furnace Download PDFInfo
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- CN1176858A CN1176858A CN 97116724 CN97116724A CN1176858A CN 1176858 A CN1176858 A CN 1176858A CN 97116724 CN97116724 CN 97116724 CN 97116724 A CN97116724 A CN 97116724A CN 1176858 A CN1176858 A CN 1176858A
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Abstract
The invented shaft furnace has no fire-proof furnace lining at the presmelting zone and smelting zone, but possesses water cooling equipment at its outside. At the common boundary of presmelting zone and smelting zone on the furnace casing is set with three rows of wind tuyere with different wind direction. The invented method includes mixing limestone, quartz sand etc. raw material according to certain proportion and feeding into the shaft furnace, using coke as fuel, adjusting wind speed and wind pressure to control the furnace temp. then water quenching and dewatering of the smelted product. It is low in cost and stable in product quality.
Description
The present invention relates to a kind of with ore directly in shaft furnace fusion with the method for producing the continuous casting covering slag base-material and used equipment thereof.This method and apparatus is particularly useful for producing continuous casting of iron and steel covering slag base-material.
The prior continuous casting protective slag base-material adopts electric furnace production substantially.But the furnace equipment investment is big, the electric energy of consumes expensive, and the cost height, and also the electro-smelting raw material must be through pulverizing.Stir, majority also need be made ball, roasting, therefore raw ore will be pulverized the molecule of making less than 10mm, and complex process also needs corresponding the pulverizing or balling equipment; In addition, electric furnace is once to melt after adding honest material, is to concentrate to slag tap when slagging tap.Concentrate shrend, cause product to be difficult to vitrifying, and yield poorly and to produce continuously owing to how circuitous material water cooling be bad.
For this reason, the invention provides a kind of method and apparatus of producing the continuous casting covering slag base-material with shaft furnace.The present invention directly drops into fusion in the shaft furnace with raw ore, and the technological process of electro-smelting is used in the pulverizing that replacement is used at present both at home and abroad → stir → make ball → roasting at last, thereby reduces operation, saves many equipment, and the minimizing power consumption.Production cost is reduced greatly.
The object of the present invention is achieved like this:
Shaft furnace of the present invention comprises: charging aperture and the preheating zone that is provided with furnace lining that is attached thereto, and the fritting band and the fusion zone that link to each other with described preheating zone, described fritting band and fusion zone place do not establish refractory lining, and be provided with water cooling equipment in its outside, on the furnace shell of described fritting band and fusion zone intersection, be provided with three row's blast orifices, wherein, in the plane that the longitudinal axis constituted of the center line in described air port and described shaft furnace, going up most the air supply direction of an exhaust outlet and the angle of described longitudinal axis formation is 30～35 degree, the angle that the air supply direction of a middle exhaust outlet and the described longitudinal axis constitute is 90 degree, the angle that constitutes of the air supply direction of next exhaust outlet and the described longitudinal axis is 145～150 degree, is provided with slag notch in the bottom of described shaft furnace.
Described water cooling equipment can be annular conduit (being the rain showering curtain type) on the outside, furnace wall that is located at described preheating zone, that have the downward hole for water spraying that evenly separates; Described water cooling equipment also can be the cooling jacket on the outside, furnace wall that is located at described fritting band and fusion zone.
Method of the present invention is:
Adopt the method for the production continuous casting covering slag base-material that above-mentioned shaft furnace carries out, the steps include:
To comprise ore that lime stone, quartz etc. are used for making the continuous casting covering slag base-material in proportion the compound that forms of batch mixes and coke in batches order add shaft furnace through the shaft furnace charging aperture; described compound is 1: 2.5～3 with the ratio of described coke; send into air by described blast orifice described coke is burnt successively, levelling air quantity, blast are so that the temperature of the preheating zone of described shaft furnace is 900～1100 ℃.The temperature of fritting band is 1350～1400 ℃. the temperature of fusion zone is 1420～1460 ℃; the temperature of slag notch is 1360～1410 ℃; thereby make described compound in the preheating zone preheating; in the fritting of fritting band; in the fusion zone fusing, after the slag notch outflow; through shrend, dehydration, dry and obtain described covering slag base-material.
The described ash content that is used as the coke of fuel should be less than 20%.
Describe the present invention below in conjunction with accompanying drawing:
Fig. 1 is the shaft furnace that adopts the rain showering curtain type that the sidewall of not establishing refractory lining is cooled among the present invention.
Fig. 2 is the shaft furnace that adopts water-jacket typ that the sidewall of not establishing refractory lining is cooled among the present invention.
Among the figure: 1-furnace lining, 2-are used to spray the water pipe of water curtain, 3-preheating zone, 4-wind band, 5-air outlet, the 6-fusion zone, 7-slag notch, 8-bottom refractory, 9-charging aperture, 10-furnace shell (steel plate formation), the 11-cooling jacket, 12-water jacket water inlet, 13-fritting band, the 14-shaft furnace longitudinal axis.
Shaft furnace of the present invention comprises: charging aperture 9 and be attached thereto be provided with the pre-tropical 3, and and described of furnace lining Fritting band 13 and fusing that the pre-torrid zone 3 links to each other are with 6, and described fritting band 13 and fusing are with 6 places not establish fire-resistant furnace lining , and be provided with water cooling equipment in its outside, establish with the furnace shell 10 of 6 intersections at described fritting band 13 and fusing Three row's blast orifices 5 are arranged, wherein, on the plane that the longitudinal axis 14 of the center line in described air port and described shaft furnace consists of In, going up the air supply direction of an air draft mouth and the angle [alpha] of the described longitudinal axis 14 formations most is 30～35 degree, middle one The angle that the air supply direction of air draft mouth and the described longitudinal axis 14 consists of is 90 degree, the air supply direction in next row air port with The angle B that the described longitudinal axis 14 consists of is 145～150 degree, is provided with slag notch 7 in the bottom of described shaft furnace.
Described water cooling equipment can adopt as shown in Figure 1 be located on the outside, described pre-tropical 3 furnace wall, with The annular conduit 2 of the downward hole for water spraying that evenly separates or shown in Figure 2 be located at described fritting band 13 and fusing is with 6 The furnace wall outside on cooling water jacket 11.
The present invention adopts the method for the production continuous casting covering slag base-material that above-mentioned shaft furnace carries out, and the steps include:
To comprise lime stone. quartzs etc. are prepared burden mixed for the manufacture of the ore of continuous casting covering slag base-material in proportion After closing and coke order is in charging aperture 9 adding shaft furnaces in batches, described compound is 1: 2.5 with the ratio of described coke～3, to send into air by described blast orifice 5 described coke is burnt successively, levelling air quantity, blast are so that perpendicular Pre-tropical 3 temperature of stove is 900～1100 ℃, and the temperature of fritting band 13 is 1350～1400 ℃, and fusing is with 6 Temperature be 1420～1460 ℃, the temperature of slag notch 7 is 1360～1410 ℃, thereby described compound is existed Pre-tropical 3 preheatings, in 13 fritting of fritting band, be with 6 fusings, flow out finally by slag notch 7 in fusing, through shrend, Dehydration, dry and obtain described covering slag base-material.
The described ash content that is used as the coke of fuel should be less than 20%.
The content of calcium oxide is more than 50% in the described lime stone, the content of silica in the described quartz More than 90%, described lime stone and quartz granularity are 2～10cm.
The present invention has following advantage:
The present invention directly drops into melting in the shaft furnace with raw ore, replaces at present the pulverizing of use → stirring both at home and abroad → make ball → roasting, use at last the technological process of electro-smelting, thereby reduce operation, save many equipment, and Reduce power consumption. production cost is reduced greatly, and constant product quality.
At different ores, the covering slag base-material that the inventive method production heterogeneity requires is adopted in explanation in conjunction with the embodiments: 1. raw material is lime stone and quartz, and its proportioning (weight portion) is below:
Lime stone: quartz=(1.5～4.0): (1.5～1.75)
Wherein the content of calcium oxide is more than 50% in the lime stone, and the content of silica is more than 90% in the quartz, and lime stone and quartz granularity are 2～10cm.Embodiment 1:
In 3 tons of shaft furnaces, to add proportioning be lime stone to order in batches: the compound and the coke of quartz=2: 1.6, and coke ratio is 1: 2.8, the blast orifice α of described shaft furnace is that 33 °, B are 147 °, is 80～100m by the control air quantity
3/ minute, blast is 1.5～2 * 10
5Handkerchief, so that the temperature of this shaft furnace preheating zone 3 is 900～1100 ℃, the temperature of fritting band 13 is 1350～1400 ℃, the temperature of fusion zone 6 is 1420～1460 ℃, the temperature of slag notch 7 is 1360～1410 ℃, every batch of material is the coke of 400 kilograms of compounds and respective numbers, every discharging in 30～40 minutes once.The main chemical of the covering slag base-material of gained is:
SiO
2 50.40％ CaO?43.25％ Al
2O
3 2.96％ Fe
2O
3 0.41％
MgO 1.00%2. raw material is lime stone, quartz and fluorite, and its proportioning (weight portion) is:
Lime stone: quartz: fluorite=(1.5～4.0): (1.5～1.75): (0.1～4.0)
Wherein the content of calcium oxide is more than 50% in the lime stone, and the content of silica is more than 90% in the quartz, and the calcirm-fluoride content in the fluorite is more than 80%, and lime stone and quartz granularity are 2～10cm, and the fluorite granularity is 2～8cm.Embodiment 2:
In 3 tons of shaft furnaces, to add proportioning be lime stone to order: quartz in batches: the compound and the coke of fluorite=2.0: 1.5: 0.38, and coke ratio is 1: 3, the blast orifice α of described shaft furnace is that 33 °, B are 147 °, is 80～100m by the control air quantity
3/ minute, blast is 1.5～2 * 10
5Handkerchief, so that the temperature of this shaft furnace preheating zone 3 is 90～1100 ℃, the temperature of fritting band 13 is 1350～1400 ℃, the temperature of fusion zone 6 is 1420～1460 ℃, the temperature of slag notch 7 is 1360～1410 ℃, every batch of material is the coke of 400 kilograms of compounds and respective numbers, every discharging in 30～40 minutes once.The main chemical of the covering slag base-material of gained is:
SiO
2 38.16％ CaO 52.78％ Al
2O
3 2.78％ Fe
2O
3 0.28％
Contain lithia in the MgO 1.06% F 4.56%3. covering slag base-material
Raw material is lime stone, quartz, fluorite and lithium carbonate, and its proportioning (weight portion) is:
Lime stone: quartz: fluorite: lithium carbonate=(1.5～4.0): (1.5～1.75): (0～
1.0)∶(0.025～0.35)
Wherein in the lime stone content of calcium oxide more than 50%, the content of silica is more than 90% in the quartz, and the calcirm-fluoride content in the fluorite is more than 80%, and lime stone and quartz granularity are 2～10cm, the fluorite granularity is 2～8cm, and lithium carbonate is an industrial chemicals.Embodiment 3:
In 3 tons of shaft furnaces, add proportioning in proper order is lime stone in batches: quartz: fluorite: lithium carbonate=4.0: 1.75: 0.25: 0.12 compound and coke, coke ratio is 1: 2.8, and the blast orifice α of described shaft furnace is that 35 °, β are 145 °, is 80～100m by the control air quantity
3/ minute, blast is 1.5～2 * 10
5Handkerchief, so that the temperature of this shaft furnace preheating zone 3 is 90～1100 ℃, the temperature of fritting band 13 is 1350～1400 ℃, the temperature of fusion zone 6 is 1420～1460 ℃, the temperature of slag notch 7 is 1360～1410 ℃, every batch of material is the coke of 400 kilograms of compounds and respective numbers, every discharging in 30～40 minutes once.The main chemical of the covering slag base-material of gained is:
SiO
2 38.65％ CaO 49.46％ Al
2O
3 2.95％ Fe
2O
3 0.5％
MgO 1.0% F 4.0% Li
2Contain sodium oxide molybdena in the O 3.0%4. covering slag base-material
Raw material is lime stone, quartz, fluorite and sodium metasilicate, and its proportioning (weight portion) is:
Lime stone: quartz: fluorite: sodium metasilicate=(1.5～4.0): (1.5～1.75): (0～
1.0)∶(0.01～1.22)
Wherein in the lime stone content of calcium oxide more than 50%, the content of silica is more than 90% in the quartz, and the calcirm-fluoride content in the fluorite is more than 80%, and lime stone and quartz granularity are 2～10cm, the fluorite granularity is 2～8cm, and sodium metasilicate is an industrial chemicals.Embodiment 4:
In 3 tons of shaft furnaces, add proportioning in proper order is lime stone in batches: quartz: fluorite: sodium metasilicate=2.0: 1.64: 0.32: 0.05 compound and coke, coke ratio is 1: 2.9, and the blast orifice α of described shaft furnace is that 35 ° of β are 145 °, is 80～100m by the control air quantity
3/ minute, blast is 1.5～2 * 10
5Handkerchief, so that the temperature of this shaft furnace preheating zone 3 is 90～1100 ℃, the temperature of fritting band 13 is 1350～1400 ℃, the temperature of fusion zone 6 is 1420～1460 ℃, the temperature of slag notch 7 is 1360～1410 ℃, every batch of material is the coke of 400 kilograms of compounds and respective numbers, every discharging in 30～40 minutes once.The main chemical of the covering slag base-material of gained is:
SiO
2 42.25％ CaO 47.25％ Al
2O
3 2.95％ Fe
2O
3 0.35％
MgO 1.10％ F 4.30％ Na
2O 1.5％
Claims (8)
1. shaft furnace that is used to produce the continuous casting covering slag base-material; it is characterized in that the preheating zone that is provided with furnace lining (3) that described shaft furnace comprises charging aperture (9) and is attached thereto; and the fritting band (13) and the fusion zone (6) that link to each other with described preheating zone (3); described fritting band (13) and fusion zone (6) locate not establish refractory lining; and be provided with water cooling equipment in its outside; on the furnace shell (10) of described fritting band (13) and fusion zone (6) intersection, be provided with three row's blast orifices (5); wherein; in the plane that the center line in described air port and the longitudinal axis of described shaft furnace (14) are constituted; going up most the air supply direction of an exhaust outlet and the angle of the described longitudinal axis (14) formation is 30～35 degree; the angle that the air supply direction of a middle exhaust outlet and the described longitudinal axis (14) constitute is 90 degree; the angle that constitutes of the air supply direction of next exhaust outlet and the described longitudinal axis (14) is 145～150 degree, is provided with slag notch (7) in the bottom of described shaft furnace.
2. shaft furnace as claimed in claim 1 is characterized in that described water cooling equipment on the furnace wall outside that is located at described preheating zone (3), has the annular conduit (2) of the downward hole for water spraying that evenly separates.
3. shaft furnace as claimed in claim 1 is characterized in that described water cooling equipment is the cooling jacket (11) on the outside, furnace wall that is located at described fritting band (13) and fusion zone (6).
4. adopt the method for the production continuous casting covering slag base-material that each shaft furnace carries out in the claim 1～3; the steps include: raw material proportioning (weight portion) is (1.5～4.0): the lime stone of (1.5～1.75); quartz compound and coke order in batches add in the shaft furnace through charging aperture (9); described compound is 1: 2.5～3 with the ratio of described coke; sending into air by described blast orifice (5) burns described coke successively; the levelling air quantity; blast is so that the temperature of the preheating zone of shaft furnace (3) is 900～1100 ℃; the temperature of fritting band (13) is 1350～1400 ℃; the temperature of fusion zone (6) is 1420～1460 ℃; the temperature of slag notch (7) is 1360～1410 ℃; thereby make (3) preheating of described compound in the preheating zone; in fritting band (13) fritting; melt at fusion zone (6); after slag notch (7) flow out; through shrend; dehydration; dry and obtain described covering slag base-material; the content of calcium oxide is more than 50% in the described lime stone; the content of silica is more than 90% in the described quartz, and described lime stone and quartz granularity are 2～10cm.
5. method as claimed in claim 4 is characterized in that said raw material by lime stone, and quartz and fluorite are formed, and its proportioning (weight portion) is:
Lime stone: quartz: fluorite=(1.5～4.0): (1.5～1.75): (0.1～1.0),
Wherein the content of calcium oxide is more than 50% in the lime stone, and the content of silica is more than 90% in the quartz, and the calcirm-fluoride content in the fluorite is more than 80%, and lime stone and quartz granularity are 2～10cm, and the fluorite granularity is 2～8cm.
6. method as claimed in claim 4 is characterized in that said raw material is made up of lime stone, quartz, fluorite and lithium carbonate, and its proportioning (weight portion) is:
Lime stone: quartz: fluorite: lithium carbonate=(1.5～4.0): (1.5～1.75): (0～
1.0)∶(0.025～0.35)
Wherein in the lime stone content of calcium oxide more than 50%, the content of silica is more than 90% in the quartz, and the calcirm-fluoride content in the fluorite is more than 80%, and lime stone and quartz granularity are 2～10cm, the fluorite granularity is 2～8cm, and lithium carbonate is industrialization two raw materials.
7. method as claimed in claim 4 is characterized in that said raw material is made up of lime stone, quartz, fluorite and sodium metasilicate, and its proportioning (weight portion) is:
Lime stone: quartz: fluorite: sodium metasilicate=(1.5～4.0): (1.5～1.75): (0～
1.0)∶(0.01～1.22)，
Wherein in the lime stone content of calcium oxide more than 50%, the content of silica is more than 90% in the quartz, and the calcirm-fluoride content in the fluorite is more than 80%, and lime stone and quartz granularity are 2～10cm, the fluorite granularity is 2～8cm, and sodium metasilicate is an industrial chemicals.
8. as the described method of above-mentioned each claim, the ash of wherein said coke as fuel is less than 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97116724A CN1041406C (en) | 1997-08-05 | 1997-08-05 | Method and equipment for prodn. of continuous casting protective slag material by tower furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97116724A CN1041406C (en) | 1997-08-05 | 1997-08-05 | Method and equipment for prodn. of continuous casting protective slag material by tower furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1176858A true CN1176858A (en) | 1998-03-25 |
| CN1041406C CN1041406C (en) | 1998-12-30 |
Family
ID=5174052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97116724A Expired - Fee Related CN1041406C (en) | 1997-08-05 | 1997-08-05 | Method and equipment for prodn. of continuous casting protective slag material by tower furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1041406C (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1099007A (en) * | 1994-05-06 | 1995-02-22 | 郭建华 | Recipe and technique for artificial tabular spar |
| CN1123256A (en) * | 1995-08-25 | 1996-05-29 | 郭健华 | Artificial wollastonite covering slag base material and its production process |
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1997
- 1997-08-05 CN CN97116724A patent/CN1041406C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1041406C (en) | 1998-12-30 |
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