CN101574736A - Preparation process of slag pot isolator - Google Patents
Preparation process of slag pot isolator Download PDFInfo
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- CN101574736A CN101574736A CNA2008100371792A CN200810037179A CN101574736A CN 101574736 A CN101574736 A CN 101574736A CN A2008100371792 A CNA2008100371792 A CN A2008100371792A CN 200810037179 A CN200810037179 A CN 200810037179A CN 101574736 A CN101574736 A CN 101574736A
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Abstract
The invention relates to a preparation process of a slag pot isolator, belonging to the technical field of smelting. The preparation process comprises the following steps: (1) adding 65-75 percent of regenerated scrap grains and 25-35 percent of alumina cement into mixing agitation equipment; (2) additionally adding 0.01-0.03 percent of water reducing agent, 0.1-0.5 percent of additive and 12-15 percent of liquid wedding agents into the mixing agitation equipment; (3) smelting the materials for 5-8 minutes in a mixing way under the condition that the outdoor temperature is 5 DEG C-25 DEG C; (4) vibrating the smelted mixing materials to be flat by a vibrating spear; (5) shaping products by self fixing so that the products can be demolded; (6) naturally maintaining; (7) roasting and selecting the products to obtain products which accord with the strength requirement to prevent the products from being burst; and (8) checking the roasted products to obtain the slag pot isolator according to a physicochemical index specification value and an outline dimension standard corresponding the products. With the preparation process of the slag pot isolator, waste bricks are recovered to be circularly mixed into the preparation materials, and the technical index and the property of the prepared slag pot isolator is the same as that of a slag pot isolator prepared by fresh materials, thereby the invention achieves good popularization and application effect.
Description
Technical field
The present invention relates to the material preparation process in the technical field of smelting, be specially the preparation technology of slag pot isolator.
Background technology
Along with the development of society, people are to the enhancing of environmental consciousness, and steel mill will be more and more general to the use of slag pot isolator.By using slag pot isolator, reduced the expense of cutting once more and round transporting, lowered production cost greatly; Eliminate the problem of environmental pollution that cutting produces, be subjected to the favorable comment of steel mill. there is how tame steel mill in Shanghai at present, and market prospects are wide.
Finish in steel-making, ladle is taken a part of molten steel out of through regular meeting in cinder ladle falls the process of slag, form integral body with slag after the molten steel cools, bring very big difficulty can for the recovery of molten steel.
There are two kinds of methods in steel mill usually to the recovery of steel scrap in the cinder ladle jar at present:
1, employing is built into intersecting parallels by laying bricks or stones with clay brick in the slag bag, treats to be divided into after the fusion slag cools off naturally the method for plurality of small blocks, so that reclaim the molten steel of bringing in the slag bag, but construction is difficult, and cost is very high.
2, adopt the method that the slag steel mixed block of pouring out is carried out the flame cutting to handle, recycle after cutting into a certain size steel scrap.Need in this process to consume a large amount of oxygen and aluminium wire pipe, produce a large amount of flue gases simultaneously, environment is polluted, and metal loss is bigger in cutting process.
At above-mentioned phenomenon, prior art design slag pot isolator template, slag pot isolator uses brand-new refractory material to make.Barrier shape refractory material by prefabricated in the process of deslagging, closes shape to the slag steel reinforced concrete naturally and cuts apart, and can effectively solve the pollution of flue gas to environment, reduces the loss in the cutting process, estimates that the recovery rate of steel scrap will rise about 30%.
But slag pot isolator new material cost is big, and floor space was big after the slag pot isolator after discarding was piled up, and caused the very big wasting of resources.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of preparation technology of slag pot isolator is provided.By the distinctive technology of the present invention, will discard the brick recycling, circulation is mixed into the preparation raw material, and the technical indicator of the slag pot isolator product of making and performance are equal to the slag pot isolator product made from brand-new material, have obtained the good effect of applying.
The present invention is achieved by the following technical solutions, and technology of the present invention specifically comprises the steps:
(1) in mixing mixing plant, add 65%---75% reclaiming waste material particle, 25%---35% alumina cement;
(2) and then add 0.01%---0.03% water reducer, 0.1%---0.5% additive, 12%---15% liquid bond.
(3) it is under 5 ℃-25 ℃ the condition mixing 5-8 minute in outdoor temperature.
(4) it is flat to use vibrating head that the compound that mixes is shaken, up to surperficial bleeding.
(5) but be that 5 ℃-25 ℃, humidity are from the moulding demoulding admittedly in 60% the condition in temperature.
(6) natural curing 23.5-24.5 hour, intensity appears to pour mass.
(7) baking, screening obtain to meet the product of requirement of strength to prevent explosion in use.
(8) according to the physicochemical index specification value of product correspondence and outline dimension standard to toasting the back product acquisition slag pot isolator of testing.
In the step (1), described reclaiming waste material, preferred 70% reclaiming waste material.Specifically be meant the discarded brick particle after the recycling, thereby saved big content of starting materials, walk the circulation route of " resource-product-discarded object-regenerated resources ".
Described discarded brick adds fashionable maximum particle size with particle form and is controlled in the 15-0mm scope, the ratio of particulate material and powder 70: 30.
Described alumina cement, preferred 30%.
Described liquid bond, preferred 14%.
Described water reducer, preferred 0.015%.
Described additive, preferred 0.15%, be meant acids set retarder or bases accelerator for hardening, the control pour mass hardens in official hour.
In the step (6), described baking, its process is specially: by 30 ℃/hour heating rates product is raised to 50 ℃ from normal temperature, according to 35 ℃/hour heating rate product is raised to 120 ℃ from 50 ℃ again, in this temperature with product insulation 6 hours; According to 25 ℃/hour heating rate product is raised to 250 ℃ afterwards, with product insulation 6 hours; Naturally cool afterwards, can kiln discharge when temperature is lower than 100 ℃.
In the step (6), the moisture of taking all factors into consideration the slag pot isolator product is in the eliminating situation of different temperatures and analyze the process that cement obtains at the aquation principle and the product strength in each temperature stage, prolong stoving time in the baking, reach the technical indicator that is equal to of the like product made from brand-new material with the intensity that guarantees slag pot isolator at 110 ℃～120 ℃ of temperature sections.
Compared with prior art, the present invention has following beneficial effect:
1, solved steel mill's discarded object and stacked disposal concerns, saved the expense that steel scrap is handled simultaneously, promoted resource continuous utilization, helped developing a circular economy.
2, it is energy-conservation that slag pot isolator is succeeded in developing not only the joint material, reduced production cost, the more important thing is towards discarded object " resource, innoxious " direction to have stepped the big step, reduced environmental pollution, the production of enterprise is reduced to as far as possible little degree to the influence of natural environment.
3, compare with the slag pot isolator that brand-new material is made, the product of technology preparation of the present invention has certain bulk density (〉=1.9g/cm
3); 2) preferably compressive resistance (〉=35Mpa); 3) refractoriness (〉=1600 ℃) preferably; 4) satisfy the instructions for use of steel mill.
The specific embodiment
Below embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
Present embodiment is implemented under following implementation condition and specification requirement condition:
(1) reclaiming waste material of adding 65% in mixing mixing plant, 35% alumina cement;
Add 0.01% water reducer then, 0.1% additive, 12% liquid bond.
Described discarded brick adds fashionable maximum particle size 10～0mm scope, the ratio of particulate material and powder 70: 30 with particle form.
(2) it is under 5 ℃ the condition mixing 5 minutes in outdoor temperature.
(3) it is flat to use vibrating head that the compound that mixes is shaken, up to surperficial bleeding.
(4) but be that 5 ℃, humidity are from the moulding demoulding admittedly in 60% the condition in temperature.
(5) natural curing is 24 hours, intensity occurs to pour mass.
(6) baking, screening obtain to meet the product of requirement of strength to prevent explosion in use.
In conjunction with following intensification form, bake process is specially: by 30 ℃/hour heating rates product is raised to 50 ℃ from normal temperature, according to 35 ℃/hour heating rate product is raised to 120 ℃ from 50 ℃ again, in this temperature with product insulation 6 hours; According to 25 ℃/hour heating rate product is raised to 250 ℃ afterwards, with product insulation 6 hours; Naturally cool afterwards, can kiln discharge when temperature is lower than 100 ℃.
| Temperature ℃ | Heating rate | Time/hour |
| Normal temperature-50 | 30 ℃/hour | 0.5 |
| 50-120 | 35 ℃/hour | 2 |
| 120 | Insulation | 6 |
| 120-250 | 25 ℃/hour | 6.5 |
| 250 | Insulation | 6 |
| 250-100 | Naturally cooling | - |
| ＜100 | Kiln discharge | - |
(7) according to the physicochemical index specification value of product correspondence and outline dimension standard to toasting the back product acquisition slag pot isolator of testing.
The moisture of taking all factors into consideration the slag pot isolator product is in the eliminating situation of different temperatures and analyze the process that cement obtains at the aquation principle and the product strength in each temperature stage, prolong stoving time in the baking, reach the technical indicator that is equal to of the like product made from brand-new material with the intensity that guarantees slag pot isolator at 110 ℃ of temperature sections.
Compare with the slag pot isolator that brand-new material is made, the product of present embodiment technology preparation has certain bulk density (1.9g/cm
3); 2) compressive resistance (35Mpa) preferably; 3) refractoriness (1600 ℃) preferably; 4) satisfy the instructions for use of steel mill.
Under the condition that keeps the slag pot isolator physicochemical property, carried out multinomial engineer testing, mainly contain:
1. refuse processing method
Established the processing method of " check the acceptable degree that pollutes, meticulous selection, the abundant cleaning judge (range estimation) that drying is processed (fragmentation), and the classification storage is stand-by, protects no longer contaminated ".
2. the introducing mode of discarded object, the test of introducing amount
For exerting an influence to the multi-level fine proportioning, elimination discarded object adding back done campaign.Definite by testing: a) described discarded brick adds fashionable granularity with particle form (grain graininess is 10～0mm); B) its ratio that cooperates with fresh material is 70: 30; C) pug granularity technological parameter (ratio of particulate material and powder 70: 30); D) calendering process of feed way, charging sequence.
Repetition test by addition has been determined: dead meal particle maximum adding quantity is 70% when above, and every performance indications of slag pot isolator can reach test requirements document equally.
3. additive test
By the test of numerous additives, make slag pot isolator obtain higher compressive resistance and bulk density.
In test, mainly selected water reducer such as Quadrafos, lignin xanthate and some to adjust the additive that firm time is used.By repetition test, it is better to add polyphosphoric acid salt material in this product, and best addition is 0.1%～0.15%, and after adding according to this amount, the flowability of compound is best relatively, and amount of water is minimum, can obtain higher intensity and than the pour mass of densification.
4. baking process
By the test of different baking process, the moisture in the slag pot isolator was discharged in the shortest time, the compressive resistance of material reaches the highest; Slag pot isolator not explosion in bake process, qualification rate reaches setting value.
5. performance test
By admixture in slag pot isolator prescription the engineer testing of different amount discarded objects, every physicochemical property of slag pot isolator has reached the re-set target value.
The slag pot isolator physicochemical property:
| The physical and chemical index title | Desired value | Measured value | Remarks |
| Al 2O 3(％) | ≥25 | 27.81 | |
| SiO 2(％) | ≥40 | 48.72 | |
| Bulk density (g/cm 3) | ≥1.90 | 1.95 | |
| Compressive resistance (MPa) | ≥35 | 39 | |
| Refractoriness (℃) | ≥1600 | - | |
| Moisture (%) | ≤1.0 | 0.9 |
Embodiment 2
Present embodiment is implemented under following implementation condition and specification requirement condition:
(1) reclaiming waste material of adding 75% in mixing mixing plant, 25% alumina cement;
Add 0.03% water reducer then, 0.5% additive, 15% liquid bond.
(2) it is under 25 ℃ the condition mixing 8 minutes in outdoor temperature.
(3) it is flat to use vibrating head that the compound that mixes is shaken, up to surperficial bleeding.
(4) but be that 25 ℃, humidity are from the moulding demoulding admittedly in 60% the condition in temperature.
(5) natural curing is 24 hours, intensity occurs to pour mass.
(6) baking, screening obtain to meet the product of requirement of strength to prevent explosion in use.
Concrete bake process is with embodiment 1.
Prolong stoving time in the baking at 120 ℃ of temperature sections.
(7) according to the physicochemical index specification value of product correspondence and outline dimension standard to toasting the back product acquisition slag pot isolator of testing.
Described discarded brick adds fashionable grain graininess with particle form and is controlled in 15～0mm scope, the ratio of particulate material and powder 70: 30.
Compare with the slag pot isolator that brand-new material is made, the product of present embodiment technology preparation has certain bulk density (1.95g/cm3); 2) preferably compressive resistance (〉=35Mpa); 3) refractoriness (1650 ℃) preferably; 4) satisfy the instructions for use of steel mill.
Under the condition that keeps the slag pot isolator physicochemical property, the engineer testing of having carried out is with embodiment 1.
Embodiment 3
Present embodiment is implemented under following implementation condition and specification requirement condition:
(1) reclaiming waste material of adding 70% in mixing mixing plant, 30% alumina cement;
Add 0.015% water reducer then, 0.15% additive, 14% liquid bond.
(2) it is under 15 ℃ the condition mixing 6.5 minutes in outdoor temperature.
(3) it is flat to use vibrating head that the compound that mixes is shaken, up to surperficial bleeding.
(4) but be that 15 ℃, humidity are from the moulding demoulding admittedly in the condition of 60% effect in temperature.
(5) natural curing is 24 hours, intensity occurs to pour mass.
(6) baking, screening obtain to meet the product of requirement of strength to prevent explosion in use.
Prolong stoving time in the baking 120 ℃ of temperature.
Concrete bake process is with embodiment 1.
(7) according to the physicochemical index specification value of product correspondence and outline dimension standard to toasting the back product acquisition slag pot isolator of testing.
Described discarded brick adds fashionable grain graininess with particle form and is controlled in 10mm～0 scope, the ratio of particulate material and powder 70: 30.
Compare with the slag pot isolator that brand-new material is made, the product of present embodiment technology preparation has certain bulk density (2.0g/cm
3); 2) compressive resistance (40Mpa) preferably; 3) refractoriness (1650 ℃) preferably; 4) satisfy the instructions for use of steel mill.
Under the condition that keeps the slag pot isolator physicochemical property, the engineer testing of having carried out is with embodiment 1.
Embodiment 4
Present embodiment is implemented under following implementation condition and specification requirement condition:
(1) reclaiming waste material of adding 67% in mixing mixing plant, 33% alumina cement;
Add 0.015% water reducer then, 0.2% additive, 13% liquid bond.
(2) it is under 7 ℃ the condition mixing 5.5 minutes in outdoor temperature.
(3) it is flat to use vibrating head that the compound that mixes is shaken, up to surperficial bleeding.
(4) but be that 8 ℃, humidity are from the moulding demoulding admittedly in 60% the condition in temperature.
(5) natural curing is 24 hours, intensity occurs to pour mass.
(6) baking, screening obtain to meet the product of requirement of strength to prevent explosion in use.
Prolong stoving time in the baking at 120 ℃ of temperature sections.
Concrete bake process is with embodiment 1.
(7) according to the physicochemical index specification value of product correspondence and outline dimension standard to toasting the back product acquisition slag pot isolator of testing.
Described discarded brick adds fashionable grain graininess with particle form and is controlled in 10～0mm scope, the ratio of particulate material and powder 70: 30.
Compare with the slag pot isolator that brand-new material is made, the product of present embodiment technology preparation has certain bulk density (1.95g/cm
3); 2) compressive resistance (36Mpa) preferably; 3) refractoriness (1650 ℃) preferably; 4) satisfy the instructions for use of steel mill.
Under the condition that keeps the slag pot isolator physicochemical property, the engineer testing of having carried out is with embodiment 1.
Embodiment 5
Present embodiment is implemented under following implementation condition and specification requirement condition:
(1) reclaiming waste material of adding 78% in mixing mixing plant, 22% alumina cement;
Add 0.025% water reducer then, 0.4% additive, 14% liquid bond.
(2) it is under 22 ℃ the condition mixing 7 minutes in outdoor temperature.
(3) it is flat to use vibrating head that the compound that mixes is shaken, up to surperficial bleeding.
(4) but be that 22 ℃, humidity are from the moulding demoulding admittedly in the condition of 60% effect in temperature.
(5) natural curing is 24 hours, intensity occurs to pour mass.
(6) baking, screening obtain to meet the product of requirement of strength to prevent explosion in use.
Concrete bake process is with embodiment 1.
Prolong stoving time in the baking at 120 ℃ of temperature sections.
(7) according to the physicochemical index specification value of product correspondence and outline dimension standard to toasting the back product acquisition slag pot isolator of testing.
Described discarded brick adds fashionable grain graininess with particle form and is controlled in 10～0mm scope, the ratio of particulate material and powder 70: 30.
Compare with the slag pot isolator that brand-new material is made, the product of present embodiment technology preparation has certain bulk density (1.95g/cm3); 2) compressive resistance (35Mpa) preferably; 3) refractoriness (〉=1600 ℃) preferably; 4) satisfy the instructions for use of steel mill.
Under the condition that keeps the slag pot isolator physicochemical property, the engineer testing of having carried out is with embodiment 1.
Claims (9)
1. the preparation technology of a slag pot isolator is characterized in that, comprises the steps:
(1) in mixing mixing plant, add 65%---75% reclaiming waste material particle, 25%---35% alumina cement;
(2) and then add 0.01%---0.03% water reducer, 0.1%---0.5% additive, 12%---15% liquid bond;
(3) it is under 5 ℃-25 ℃ the condition mixing 5-8 minute in outdoor temperature;
(4) it is flat to use vibrating head that the compound that mixes is shaken, up to surperficial bleeding;
(5) but be that 5 ℃-25 ℃, humidity are from the moulding demoulding admittedly in 60% the condition in temperature;
(6) natural curing 23-24 hour, intensity appears to pour mass;
(7) baking, screening obtain to meet the product of requirement of strength to prevent explosion in use;
(8) according to the physicochemical index specification value of product correspondence and outline dimension standard to toasting the back product acquisition slag pot isolator of testing.
2. the preparation technology of slag pot isolator as claimed in claim 1 is characterized in that, reclaiming waste material described in the step (1) is 70% reclaiming waste material, specifically is meant the discarded brick particle after the recycling.
3. the preparation technology of slag pot isolator as claimed in claim 2 is characterized in that, described discarded brick adds fashionable grain graininess with particle form and is controlled in the 15-0mm scope, the ratio of particulate material and powder 70: 30.
4. the preparation technology of slag pot isolator as claimed in claim 1 is characterized in that, described alumina cement, its content are 30%.
5. the preparation technology of slag pot isolator as claimed in claim 1 is characterized in that, described liquid bond, its content are 14%.
6. the preparation technology of slag pot isolator as claimed in claim 1 is characterized in that, described water reducer, its content are 0.015%.
7. the preparation technology of slag pot isolator as claimed in claim 1 is characterized in that, described additive, its content are 0.15%.
8. the preparation technology of slag pot isolator as claimed in claim 1, it is characterized in that, baking described in the step (6), its process is specially: by 30 ℃/hour heating rates product is raised to 50 ℃ from normal temperature, according to 35 ℃/hour heating rate product is raised to 120 ℃ from 50 ℃ again, in this temperature with product insulation 6 hours; According to 25 ℃/hour heating rate product is raised to 250 ℃ afterwards, with product insulation 6 hours; Naturally cool afterwards, can kiln discharge when temperature is lower than 100 ℃.
9. the preparation technology of slag pot isolator as claimed in claim 8 is characterized in that, prolongs the stoving time at 110 ℃～120 ℃ of temperature sections in the step (6) in the baking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100371792A CN101574736A (en) | 2008-05-09 | 2008-05-09 | Preparation process of slag pot isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100371792A CN101574736A (en) | 2008-05-09 | 2008-05-09 | Preparation process of slag pot isolator |
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| Publication Number | Publication Date |
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| CN101574736A true CN101574736A (en) | 2009-11-11 |
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ID=41269881
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| CNA2008100371792A Pending CN101574736A (en) | 2008-05-09 | 2008-05-09 | Preparation process of slag pot isolator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226916A (en) * | 2014-09-26 | 2014-12-24 | 衡阳中钢衡重铸锻有限公司 | Casting method of slag ladle and casting mold |
| CN104313210A (en) * | 2014-10-13 | 2015-01-28 | 南京梅山冶金发展有限公司 | Grid processing technology for treating metallurgical slag |
-
2008
- 2008-05-09 CN CNA2008100371792A patent/CN101574736A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226916A (en) * | 2014-09-26 | 2014-12-24 | 衡阳中钢衡重铸锻有限公司 | Casting method of slag ladle and casting mold |
| CN104313210A (en) * | 2014-10-13 | 2015-01-28 | 南京梅山冶金发展有限公司 | Grid processing technology for treating metallurgical slag |
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Open date: 20091111 |