CN111718202A - Environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming and preparation method thereof - Google Patents
Environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming and preparation method thereof Download PDFInfo
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Abstract
The invention provides environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming which comprises the following components in parts by weight: aggregate: 2-5 parts of kyanite; 15-20 parts of high alumina bauxite; 15-20 parts of aluminum chromium material; 15-20 parts of magnesia carbon material; 6-10 parts of coke; 13-16 parts of a corundum carbon composite material; micro-powder: 5-10 parts of Guangxi white mud; 5-8 parts of sericite; 3-6 parts of silicon carbide; binding agent: 3-6 parts of modified asphalt; 2-4 parts of modified resin; 10-15 parts of modified tar; in addition, the invention also provides a preparation method of the anhydrous stemming, and the method is simple to operate and mild in preparation process.
Description
Technical Field
The invention provides an environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming and a preparation method thereof, belonging to the technical field of refractory materials.
Background
In recent years, the iron-making technology at home and abroad is greatly improved, the requirement on anhydrous stemming products is continuously improved, the condition that each furnace iron can be completely discharged, and a stable taphole operation state is ensured. And stemming is just a key product for meeting the production requirements. In the prior art, the stemming is mainly prepared from high alumina bauxite, coke, clay, silicon carbide, asphalt, corundum and tar bonding agent, so that the stemming has the following defects: 1. low scouring resistance, weak slag resistance and poor environmental protection performance. Cannot meet increasingly strict smelting and environmental requirements; 2. when the smelting strength is high due to the fact that the material structure is still in the traditional method, stemming consumption is increased, and the problems of environmental protection and increase of use cost are obvious; 3 because of the material structure is along leading to low, the slag resistance intensity weak with the resistant scour strength of traditional method, leads to the blast furnace tapping time not enough, and when smelting intensity is high can have the stifled iron notch or the iron notch is too shallow, the potential safety hazard risk. The problem of great instability factor is caused to the normal operation before the iron. In summary, the stemming in the prior art has the following problems: weak scouring resistance, large consumption and high cost; the slag resistance strength is weak, the iron notch is easy to be shallow, and the potential safety hazard is caused; environmental protection problems; has great dependence on non-renewable resources such as high alumina bauxite.
Disclosure of Invention
The invention provides the environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming and the preparation method thereof, aiming at solving the defects and shortcomings in the prior art, and the stemming has the advantages of low cost, high efficiency, good air permeability and plasticity, high slag resistance, environment-friendly sintering property, no iron notch breakage, capability of meeting the deep mud bag requirement of iron notches under various furnace conditions and the like.
In order to solve the technical problems, the invention provides environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming which comprises the following components in parts by weight:
aggregate:
2-5 parts of kyanite;
15-20 parts of high alumina bauxite;
15-20 parts of aluminum chromium material;
15-20 parts of magnesia carbon material;
6-10 parts of coke;
13-16 parts of a corundum carbon composite material;
micro-powder:
5-10 parts of Guangxi white mud;
5-8 parts of sericite;
3-6 parts of silicon carbide;
binding agent:
3-6 parts of modified asphalt;
2-4 parts of modified resin;
10-15 parts of modified tar.
Further, the preparation method of the modified asphalt comprises the following steps: the dehydrated tar is pressurized to 0.5-2MPa in a reaction kettle, heated to 320-370 ℃ and kept for 5-20 hours.
Further, the modified resin is obtained by condensation reaction of phenol and aralkyl ether.
Further, the modified tar is carbon black oil, is coal tar high-boiling-point distillate, and comprises asphalt and anthracene oil.
In addition, the invention also provides a preparation method of the environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming, which comprises the following steps:
step one, drying aggregate and micro powder components to ensure that the water content of each component is less than 0.5%;
grinding the dried components by using crushing and grinding equipment, wherein the particle size of the aggregate is 0-3 mm, and the particle size of the micro powder is 180-200 meshes;
step three, carrying out dehydration treatment on the bonding agent by using a heating system;
step four, adding the aggregate and the micro powder into stirring equipment according to the proportion, stirring the dry materials for 10-20 minutes, then adding the bonding agent, and continuously stirring for 20-40 minutes to obtain the uniformly mixed stemming material;
and step five, adding the stemming material obtained in the step four into stemming production equipment, and carrying out forming, cutting, film sealing and heat preservation storage under the condition of constant temperature of 100-120 ℃.
The specific process of the third step is as follows:
3.1, carrying out primary heating dehydration treatment on the bonding agent, wherein the dehydration temperature is 100-150 ℃, and the heating time is 72 hours;
3.2 preheating 6 hours in advance, and carrying out secondary heating at the heating temperature of 80-100 ℃.
The invention achieves the following beneficial technical effects:
1. the invention provides an environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming and a preparation method thereof, wherein in the use process of the anhydrous stemming, due to the high temperature of 1400 ℃ of a blast furnace taphole channel, sintering reaction is generated on aluminum elements and chromium elements in a formula, Al2O3 is mainly formed, and Cr2O3 is used as an auxiliary material. Thereby leading the stemming structure to have excellent high-temperature mechanical strength and good erosion resistance and slag iron resistance. The stemming in the prior art has the problems of no erosion resistance, large consumption and high use cost.
2. According to the magnesium carbon material in the technical formula provided by the invention, the magnesium oxide element is beneficial to rapid sintering and adhesion characteristics, so that the stemming is rapidly coked and hardened after being shot into the taphole channel, and the purposes of reducing the usage amount of the stemming and meeting the ladle depth required by the taphole are achieved. The problem of metallurgical strength in the furnace can not be influenced, and the problems of mud waste and too shallow or incomplete mud bags caused by slow coking of the stemming appear.
3. The carbon material is combined because the carbon material is in a porous structure, so that the stemming has good air permeability and plasticity. The stemming volatile matter is timely discharged due to good air permeability, and plasticity can uniformly enter the taphole channel when the stemming is beaten, so that the sintering fracture taphole condition can not be caused by gaps.
4. The modified resin, the modified asphalt and the modified tar are added as the binding agent, aiming at the problem that the traditional tar-asphalt combined stemming generates toxic yellow gas during sintering, the environment-friendly effect of not emitting yellow smoke and the effect of stabilizing the working condition of the taphole are effectively achieved under the condition of not increasing the cost.
5. The added waste corundum material can improve the strength of the stemming and obviously reduce the dependence on the non-renewable resource high alumina bauxite.
Detailed Description
The invention is further described with reference to specific examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The following examples are provided to further illustrate the present invention.
Example 1
Step one, drying aggregate and micro powder components to ensure that the water content of each component is less than 0.5%;
grinding the dried components by using crushing and grinding equipment, wherein the particle size of the aggregate is 0-3 mm, and the particle size of the micro powder is 180-200 meshes;
step three, carrying out dehydration treatment on the bonding agent by using a heating system; the specific process is as follows:
carrying out primary heating dehydration treatment on the bonding agent, wherein the dehydration temperature is 100-150 ℃, and the heating time is 72 hours; preheating for 6 hours in advance, and carrying out secondary heating at the temperature of 80-100 DEG C
Step four, adding the aggregate and the micro powder into stirring equipment according to the proportion, stirring the dry materials for 10-20 minutes, then adding the bonding agent, and continuously stirring for 20-40 minutes to obtain the uniformly mixed stemming material; the formula comprises the following components in parts by weight:
aggregate: kyanite 2; 15 parts of high alumina bauxite; an aluminum chrome material 15; a magnesia carbon material 15; 6 of coke; a corundum carbon composite material 13;
micro-powder: guangxi white mud 5; sericite 5; silicon carbide 3;
binding agent: 3, modified asphalt; a modified resin 2; 10 parts of modified tar;
and step five, adding the stemming material obtained in the step four into stemming production equipment, and carrying out forming, cutting, film sealing and heat preservation storage under the condition of constant temperature of 100-120 ℃.
Example 2
The preparation process is identical to that of example 1, with only the formulation being different:
aggregate: kyanite 4; high alumina bauxite 18; an aluminum chrome material 18; a magnesia carbon material 18; 8 of coke; a corundum carbon composite material 15;
micro-powder: guangxi white mud 8; sericite 6; 5, silicon carbide;
binding agent: 5, modified asphalt; a modified resin 3; modified tar 12.
Example 3
The preparation process is identical to that of example 1, with only the formulation being different:
aggregate: kyanite 5; 20 parts of high alumina bauxite; an aluminum chrome material 20; a magnesia carbon material 20; 10 of coke; a corundum carbon composite 16;
micro-powder: guangxi white mud 10; sericite 8; 6 of silicon carbide;
binding agent: 6, modified asphalt; a modified resin 4; modified tar 15.
The anhydrous stemming prepared by the methods of examples 1 to 3 is applied to a blast furnace taphole channel by the new Wuan iron group Co Ltd in Hebei, and the results show that: 1. the anhydrous stemming prepared in the embodiments 1 to 3 has the advantages of strong plasticity, fast coking, convenience for opening an iron notch and the like, can be defoamed within 15 minutes, the iron notch is exchanged with a normal opening, and the depth of the iron notch is 2.5 meters, which is far higher than the requirement on the stability of the stemming in the prior art; 2. the iron notch is not broken more than twice in one shift, and the iron notch is not splashed or smoked; 3. the slag iron corrosion resistance is good, and the continuous tapping can be carried out for more than 60 minutes.
The present invention has been disclosed in terms of the preferred embodiment, but is not intended to be limited to the embodiment, and all technical solutions obtained by substituting or converting equivalents thereof fall within the scope of the present invention.
Claims (6)
1. The environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming is characterized by comprising the following components in parts by weight:
aggregate:
2-5 parts of kyanite;
15-20 parts of high alumina bauxite;
15-20 parts of aluminum chromium material;
15-20 parts of magnesia carbon material;
6-10 parts of coke;
13-16 parts of a corundum carbon composite material;
micro-powder:
5-10 parts of Guangxi white mud;
5-8 parts of sericite;
3-6 parts of silicon carbide;
binding agent:
3-6 parts of modified asphalt;
2-4 parts of modified resin;
10-15 parts of modified tar.
2. The preparation method of the environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming according to claim 1, characterized in that the preparation method of the modified asphalt comprises the following steps: the dehydrated tar is pressurized to 0.5-2MPa in a reaction kettle, heated to 320-370 ℃ and kept for 5-20 hours.
3. The preparation method of the environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming according to claim 1, characterized by comprising the following steps: the modified resin is obtained by condensation reaction of phenol and aralkyl ether.
4. The preparation method of the environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming according to claim 1, characterized by comprising the following steps: the modified tar is carbon black oil, is a high-boiling-point distillate of coal tar, and comprises asphalt and anthracene oil.
5. The method for preparing the environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming according to any one of claims 1 to 4, which is characterized by comprising the following steps of:
step one, drying aggregate and micro powder components to ensure that the water content of each component is less than 0.5%;
grinding the dried components by using crushing and grinding equipment, wherein the particle size of the aggregate is 0-3 mm, and the particle size of the micro powder is 180-200 meshes;
step three, carrying out dehydration treatment on the bonding agent by using a heating system;
step four, adding the aggregate and the micro powder into stirring equipment according to the proportion, stirring the dry materials for 10-20 minutes, then adding the bonding agent, and continuously stirring for 20-40 minutes to obtain the uniformly mixed stemming material;
and step five, adding the stemming material obtained in the step four into stemming production equipment, and carrying out forming, cutting, film sealing and heat preservation storage under the condition of constant temperature of 100-120 ℃.
6. The preparation method of the environment-friendly aluminum-magnesium-chromium high-performance anhydrous stemming according to claim 5, characterized in that the specific process of the third step is as follows:
3.1, carrying out primary heating dehydration treatment on the bonding agent, wherein the dehydration temperature is 100-150 ℃, and the heating time is 72 hours;
3.2 preheating 6 hours in advance, and carrying out secondary heating at the heating temperature of 80-100 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115716753A (en) * | 2022-11-14 | 2023-02-28 | 太原科技大学 | Blast furnace environment-friendly carbonaceous binder, preparation method and blast furnace stemming |
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| JPH11217264A (en) * | 1998-01-30 | 1999-08-10 | Kawasaki Steel Corp | Tar mud material and its production |
| CN102250570A (en) * | 2010-05-19 | 2011-11-23 | 张苏侠 | Preparation method of phenolic resin adhesive |
| CN102336574A (en) * | 2010-07-27 | 2012-02-01 | 辽宁科技大学 | Method for producing waterless taphole mix for blast furnace from high-alumina waste refractory materials |
| CN103833389A (en) * | 2013-11-26 | 2014-06-04 | 阜康市三工河乡樟兴新型耐火材料厂 | Waterless stemming and preparation method thereof |
| CN105906359A (en) * | 2016-04-29 | 2016-08-31 | 郑州赛沃科技有限公司 | Environment-friendly stemming and preparation method thereof |
| CN107056260A (en) * | 2017-05-03 | 2017-08-18 | 巩义市宏宇耐火材料有限公司 | It is a kind of to be used for blocking environment-friendly type anhydrous stemming of blast furnace tapping hole and preparation method thereof |
| CN110981447A (en) * | 2019-12-20 | 2020-04-10 | 郑州市瑞沃耐火材料有限公司 | Carbon composite anhydrous stemming for large-scale blast furnace and preparation method thereof |
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2020
- 2020-07-10 CN CN202010659675.2A patent/CN111718202A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11217264A (en) * | 1998-01-30 | 1999-08-10 | Kawasaki Steel Corp | Tar mud material and its production |
| CN102250570A (en) * | 2010-05-19 | 2011-11-23 | 张苏侠 | Preparation method of phenolic resin adhesive |
| CN102336574A (en) * | 2010-07-27 | 2012-02-01 | 辽宁科技大学 | Method for producing waterless taphole mix for blast furnace from high-alumina waste refractory materials |
| CN103833389A (en) * | 2013-11-26 | 2014-06-04 | 阜康市三工河乡樟兴新型耐火材料厂 | Waterless stemming and preparation method thereof |
| CN105906359A (en) * | 2016-04-29 | 2016-08-31 | 郑州赛沃科技有限公司 | Environment-friendly stemming and preparation method thereof |
| CN107056260A (en) * | 2017-05-03 | 2017-08-18 | 巩义市宏宇耐火材料有限公司 | It is a kind of to be used for blocking environment-friendly type anhydrous stemming of blast furnace tapping hole and preparation method thereof |
| CN110981447A (en) * | 2019-12-20 | 2020-04-10 | 郑州市瑞沃耐火材料有限公司 | Carbon composite anhydrous stemming for large-scale blast furnace and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115716753A (en) * | 2022-11-14 | 2023-02-28 | 太原科技大学 | Blast furnace environment-friendly carbonaceous binder, preparation method and blast furnace stemming |
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