CN103936447A - Ladle-mouth magnesia carbon brick added with pyrophyllite and preparation method of ladle-mouth magnesia carbon brick - Google Patents
Ladle-mouth magnesia carbon brick added with pyrophyllite and preparation method of ladle-mouth magnesia carbon brick Download PDFInfo
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- CN103936447A CN103936447A CN201410152198.5A CN201410152198A CN103936447A CN 103936447 A CN103936447 A CN 103936447A CN 201410152198 A CN201410152198 A CN 201410152198A CN 103936447 A CN103936447 A CN 103936447A
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Abstract
The invention discloses a ladle-mouth magnesia carbon brick added with pyrophyllite. The ladle-mouth magnesia carbon brick added with the pyrophyllite is prepared from the following raw materials in percentage by weight: 15-30% of 3-5mm waste magnesia carbon brick particles, 15-30% of 1-3mm waste magnesia carbon brick particles, 15-25% of 0-1mm waste magnesia carbon brick particles, 10-20% of 1-3mm pyrophyllite particles, 0-4% of additives, 10-25% of waste magnesia carbon brick fine powder and 3.5-4.5% of a binding agent. The preparation method of the ladle-mouth magnesia carbon brick added with the pyrophyllite comprises the steps of raw material sorting and deslagging, crushing and sieving to obtain fractions, mixing and stirring according to proportions, compression molding by use of a press, drying and thermal treatment. The ladle-mouth magnesia carbon brick is added with a certain amount of pyrophyllite so that the expansion character of the brick can be improved, and therefore, the problem that the waste magnesia carbon bricks cannot be directly recycled due to insufficient expansion capacity because the waste magnesia carbon bricks contain slags and impurities; the low temperature phase change of the pyrophyllite promotes the sintering of the magnesia carbon brick, and consequently, the strength of the magnesia carbon brick is higher and in particular the binding strength of the magnesia carbon brick after reacting at a high temperature is better, and therefore, the magnesia carbon brick can be applied to the ladle mouth position of a ladle, and is capable of saving resources and reducing emission.
Description
Technical field
The present invention relates in refractory materials technical field of producing, refer in particular to a kind of bag mouth magnesia carbon brick that adds agalmatolite and preparation method thereof.
Background technology
China's steel industry output is huge, the discarded magnesia carbon brick of annual use reaches more than 1,000 ten thousand tons, the processing of this material has brought very large trouble to iron and steel enterprise, through the variation of refractory materials bidding mode, development and the maturation of contracting along with functional entirety, to refractory materials, reclaiming utilizes technology more and more urgent, more and more important.Owing to only passing through simple break process with refractory, do not carry out precision work, limit its usage quantity and use range, cause the Returning utilization rate with refractory lower, cause a large amount of wastings of resources and destroyed the sanitation and hygiene of plant area.Therefore, be significant to carry out regeneration research with refractory, regenerative magnesia-carbon brick has good market and prospect.
At present, mainly have a difficult problem for physics and chemistry two aspects aspect the recycling of the magnesia carbon brick after use, generalized case discards or sells as the base-material cheapness in other industry field.Aspect physical cause, be often stained with discontinuously the slag that one deck is very thin on mainly due to working face, also be to be exactly magnesia carbon brick dross, simultaneously, because brick produces one deck metamorphic layer after being corroded by slag, be mainly eutectic, this layer of slag and metamorphic layer are unfavorable for the regeneration of refractory materials; Its non-working surface, often because oxidation bleaches, makes the low of the more original magnesia carbon brick of its carbon content, and inserting mortar material magnesia sintering rear section sticks on non-working surface simultaneously; Between brick and brick or in the crack of brick, press from both sides sometimes one deck iron plate, some adhesion chamotte.Chemical principle because of aspect because the particular surroundings of metallurgical furnace causes the significantly variation of composition in magnesia carbon brick, cannot moulding or cracking if directly produce as raw material that magnesia carbon brick can cause, fire performance is crossed the phenomenons such as poor.
Summary of the invention
In order to solve that waste and old magnesia carbon brick contains slag and impurity and the swell increment deficiency that causes magnesia carbon brick, make to be directly used in cycling and reutilization in the problem of steel ladle opening, the present invention proposes a kind of bag mouth magnesia carbon brick that adds agalmatolite and preparation method thereof, improve expansion character by adding a certain amount of agalmatolite, efficiently solve that waste magnesia carbon brick contains slag and impurity and swell increment deficiency makes to be directly used in the problem of cycling and reutilization.
The technical solution adopted in the present invention is: a kind of bag mouth magnesia carbon brick that adds agalmatolite, raw material by following weight proportioning is prepared from: the waste magnesia carbon brick particle 15-30% of particle diameter 3-5mm, the waste magnesia carbon brick particle 15-30% of particle diameter 1-3mm, particle diameter is less than the waste magnesia carbon brick particle 15-25% of 1mm, the agalmatolite particle 10-20% of particle diameter 1-3mm, bonding agent 0-4%, waste magnesia carbon brick powder 0-25%, additive 3.5-4.5%.
The present invention improves the expansion character of magnesia carbon brick by adding a certain amount of agalmatolite, the low temperature phase change of agalmatolite has promoted the sintering of magnesia carbon brick, and intensity is higher, and especially under high temperature, reacted bonding strength is better.Add after pyrophyllite material, magnesia carbon brick expands and becomes large, is applied to the bag port part of ladle, can effectively fix steel ladle opening position, magnesia carbon brick below is also played to an effect of contraction, especially reduce with expanding with heat and contract with cold in the magnesia carbon brick use procedure of avoiding below and cause parallel seam problem; Economize on resources simultaneously, reduce discharge.
As preferably, described additive is carborundum powder or silica flour.Carborundum powder or silica flour can effectively be in harmonious proportion each component.
As preferably, described bonding agent is resin.Optimal bonding agent is resol.
An its preparation method for the bag mouth magnesia carbon brick that adds agalmatolite as above, comprises and is prepared as follows step:
(1) material sorting slagging-off: by waste magnesia carbon brick sorting, first remove one by one dust, earth and the inclusion that its surface is stained with, then remove slag blanket and metamorphic layer, carry out hydration process;
(2) broken pulverizing and sieve fraction: with crusher, waste magnesia carbon brick is carried out to several times and break pulverizing, and carry out magnetic separation, hydration process and drying treatment, then be sieved into through double-deck reciprocating sieve waste magnesia carbon brick particle and the pulverous waste magnesia carbon brick powder that particle diameter is less than 1mm, particle diameter 1-3mm, tri-kinds of diameters of particle diameter 3-5mm;
(3) prepare burden by proportioning and stir: weight proportion is the waste magnesia carbon brick particle 15-30% of particle diameter 3-5mm, the waste magnesia carbon brick particle 15-30% of particle diameter 1-3mm, particle diameter is less than the waste magnesia carbon brick particle 15-25% of 1mm, the agalmatolite particle 10-20% of particle diameter 1-3mm, additive 0-4%, waste magnesia carbon brick powder 0-25%, tackiness agent 3.5-4.5%;
(4) pressing machine compression moulding;
(5) dry and thermal treatment.
As preferably, in described step (5), heat treated temperature is 160 DEG C to 200 DEG C.Wherein, optimum thermal treatment temp is 180 DEG C.
The invention has the beneficial effects as follows: improve expansion character by adding a certain amount of agalmatolite, efficiently solve that waste magnesia carbon brick contains slag and impurity and swell increment deficiency makes to be directly used in the problem of cycling and reutilization; The low temperature phase change of agalmatolite has promoted the sintering of magnesia carbon brick, and intensity is higher, and especially under high temperature, reacted bonding strength is better, can be applied to the bag port part of ladle, economizes on resources, and reduces discharge.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment 1
A kind of bag mouth magnesia carbon brick that adds agalmatolite, raw material by following weight proportioning is prepared from: the waste magnesia carbon brick particle 30% of particle diameter 3-5mm, the waste magnesia carbon brick particle 10% of particle diameter 1-3mm, particle diameter is less than the waste magnesia carbon brick particle 15% of 1mm, the agalmatolite particle 15% of particle diameter 1-3mm, carborundum powder 4%, waste magnesia carbon brick powder 22.5%, resin 3.5%.
Its preparation method of the bag mouth magnesia carbon brick that adds agalmatolite as above, preparation process is as follows:
(1) material sorting slagging-off: by waste magnesia carbon brick sorting, first remove one by one dust, earth and the inclusion that its surface is stained with, then remove slag blanket and metamorphic layer, carry out hydration process;
(2) broken pulverizing and sieve fraction: with crusher, waste magnesia carbon brick is carried out to several times and break pulverizing, and carry out magnetic separation, hydration process and drying treatment, be sieved into through double-deck reciprocating sieve waste magnesia carbon brick particle and the pulverous waste magnesia carbon brick powder that particle diameter is less than 1mm, particle diameter 1-3mm, tri-kinds of diameters of particle diameter 3-5mm again, choose;
(3) prepare burden and stir: by proportioning selection raw material, being deployed into brick material, and stirring;
(4) pressing machine compression moulding: by the brick material compression moulding after stirring, form brick body with pressing machine;
(5) dry and thermal treatment: the brick body after compression moulding is dried, and heat-treats at the temperature of 180 DEG C.
Embodiment 2
A kind of bag mouth magnesia carbon brick that adds agalmatolite, raw material by following weight proportioning is prepared from: the waste magnesia carbon brick particle 15% of particle diameter 3-5mm, the waste magnesia carbon brick particle 30% of particle diameter 1-3mm, particle diameter is less than the waste magnesia carbon brick particle 25% of 1mm, the agalmatolite particle 10% of particle diameter 1-3mm, silica flour 3%, waste magnesia carbon brick powder 12.5%, resin 4.5%.
Its preparation method of the bag mouth magnesia carbon brick that adds agalmatolite as above, preparation process is as follows:
(1) material sorting slagging-off: by waste magnesia carbon brick sorting, first remove one by one dust, earth and the inclusion that its surface is stained with, then remove slag blanket and metamorphic layer, carry out hydration process;
(2) broken pulverizing and sieve fraction: with crusher, waste magnesia carbon brick is carried out to several times and break pulverizing, and carry out magnetic separation, hydration process and drying treatment, be sieved into through double-deck reciprocating sieve waste magnesia carbon brick particle and the pulverous waste magnesia carbon brick powder that particle diameter is less than 1mm, particle diameter 1-3mm, tri-kinds of diameters of particle diameter 3-5mm again, choose;
(3) prepare burden and stir: by proportioning selection raw material, being deployed into brick material, and stirring;
(4) pressing machine compression moulding: by the brick material compression moulding after stirring, form brick body with pressing machine;
(5) dry and thermal treatment: the brick body after compression moulding is dried, and heat-treats at the temperature of 200 DEG C.
Embodiment 3
A kind of bag mouth magnesia carbon brick that adds agalmatolite, raw material by following weight proportioning is prepared from: the waste magnesia carbon brick particle 30% of particle diameter 3-5mm, the waste magnesia carbon brick particle 15% of particle diameter 1-3mm, particle diameter is less than the waste magnesia carbon brick particle 25% of 1mm, the agalmatolite particle 20% of particle diameter 1-3mm, carborundum powder 1%, waste magnesia carbon brick powder 5%, resin 4%.
Its preparation method of the bag mouth magnesia carbon brick that adds agalmatolite as above, preparation process is as follows:
(1) material sorting slagging-off: by waste magnesia carbon brick sorting, first remove one by one dust, earth and the inclusion that its surface is stained with, then remove slag blanket and metamorphic layer, carry out hydration process;
(2) broken pulverizing and sieve fraction: with crusher, waste magnesia carbon brick is carried out to several times and break pulverizing, and carry out magnetic separation, hydration process and drying treatment, be sieved into through double-deck reciprocating sieve waste magnesia carbon brick particle and the pulverous waste magnesia carbon brick powder that particle diameter is less than 1mm, particle diameter 1-3mm, tri-kinds of diameters of particle diameter 3-5mm again, choose;
(3) prepare burden and stir: by proportioning selection raw material, being deployed into brick material, and stirring;
(4) pressing machine compression moulding: by the brick material compression moulding after stirring, form brick body with pressing machine;
(5) dry and thermal treatment: the brick body after compression moulding is dried, and heat-treats at the temperature of 160 DEG C.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection scope of the present invention.
Claims (5)
1. one kind adds the bag mouth magnesia carbon brick of agalmatolite, it is characterized in that: the raw material by following weight proportioning is prepared from: the waste magnesia carbon brick particle 15-30% of particle diameter 3-5mm, the waste magnesia carbon brick particle 15-30% of particle diameter 1-3mm, particle diameter is less than the waste magnesia carbon brick particle 15-25% of 1mm, the agalmatolite particle 10-20% of particle diameter 1-3mm, additive 0-4%, waste magnesia carbon brick powder 0-25%, tackiness agent 3.5-4.5%.
2. the bag mouth magnesia carbon brick that adds agalmatolite according to claim 1, is characterized in that: described additive is carborundum powder or silica flour.
3. the bag mouth magnesia carbon brick that adds agalmatolite according to claim 1, is characterized in that: described bonding agent is resin.
4. an its preparation method for the bag mouth magnesia carbon brick that adds agalmatolite as claimed in claim 1, is characterized in that: comprise and be prepared as follows step:
(1) material sorting slagging-off: by waste magnesia carbon brick sorting, first remove one by one dust, earth and the inclusion that its surface is stained with, then remove slag blanket and metamorphic layer, carry out hydration process;
(2) broken pulverizing and sieve fraction: with crusher, waste magnesia carbon brick is carried out to several times and break pulverizing, and carry out magnetic separation, hydration process and drying treatment, then be sieved into through double-deck reciprocating sieve waste magnesia carbon brick particle and the pulverous waste magnesia carbon brick powder that particle diameter is less than 1mm, particle diameter 1-3mm, tri-kinds of diameters of particle diameter 3-5mm;
(3) prepare burden by proportioning and stir: weight proportion is the waste magnesia carbon brick particle 15-30% of particle diameter 3-5mm, the waste magnesia carbon brick particle 15-30% of particle diameter 1-3mm, particle diameter is less than the waste magnesia carbon brick particle 15-25% of 1mm, the agalmatolite particle 10-20% of particle diameter 1-3mm, additive 0-4%, waste magnesia carbon brick powder 0-25%, tackiness agent 3.5-4.5%;
(4) pressing machine compression moulding;
(5) dry and thermal treatment.
5. its preparation method of the bag mouth magnesia carbon brick that adds agalmatolite according to claim 4, is characterized in that: in described step (5), heat treated temperature is 160 DEG C to 200 DEG C.
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| CN201410152198.5A CN103936447B (en) | 2014-04-16 | 2014-04-16 | Bag mouth magnesia carbon brick adding agalmatolite and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105347821A (en) * | 2015-11-09 | 2016-02-24 | 周维逊 | Production method for firebricks and production system for firebricks |
| CN111925189A (en) * | 2020-06-30 | 2020-11-13 | 辽宁东和新材料股份有限公司 | Composite magnesia carbon brick and preparation method thereof |
Citations (2)
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| CN102942372A (en) * | 2012-10-12 | 2013-02-27 | 酒泉钢铁(集团)有限责任公司 | A method for producing regenerated magnesia-carbon bricks using waste magnesia-carbon bricks as raw materials |
| CN103467118A (en) * | 2013-08-29 | 2013-12-25 | 浙江长兴强立耐火材料有限公司 | High-utilization-ratio reproduced MgO-C brick and manufacturing method thereof |
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- 2014-04-16 CN CN201410152198.5A patent/CN103936447B/en not_active Expired - Fee Related
Patent Citations (2)
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| CN102942372A (en) * | 2012-10-12 | 2013-02-27 | 酒泉钢铁(集团)有限责任公司 | A method for producing regenerated magnesia-carbon bricks using waste magnesia-carbon bricks as raw materials |
| CN103467118A (en) * | 2013-08-29 | 2013-12-25 | 浙江长兴强立耐火材料有限公司 | High-utilization-ratio reproduced MgO-C brick and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105347821A (en) * | 2015-11-09 | 2016-02-24 | 周维逊 | Production method for firebricks and production system for firebricks |
| CN111925189A (en) * | 2020-06-30 | 2020-11-13 | 辽宁东和新材料股份有限公司 | Composite magnesia carbon brick and preparation method thereof |
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