CN103523807A - Reactor for preparing high-viscosity silicon-steel magnesium oxide and preparation method thereof - Google Patents
Reactor for preparing high-viscosity silicon-steel magnesium oxide and preparation method thereof Download PDFInfo
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- CN103523807A CN103523807A CN201210513714.3A CN201210513714A CN103523807A CN 103523807 A CN103523807 A CN 103523807A CN 201210513714 A CN201210513714 A CN 201210513714A CN 103523807 A CN103523807 A CN 103523807A
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Abstract
The invention relates to a method for preparing high-viscosity silicon-steel magnesium oxide. The preparation method comprises the following steps: (a) placing magnesium oxide powder and a surfactant in a reactor, and adding activated water into the reactor to carry out hydration reaction, wherein the temperature of the hydration reaction is 80-90 DEG C, and the time of the hydration reaction is 1-2 hours; (b) carrying out separating, water washing and drying on a product obtained after the hydration reaction in the step a, so as to prepare magnesium hydroxide; and (c) placing the magnesium hydroxide prepared in the step b into a high-temperature converter, and calcinating by using a dynamic calcinating method so as to obtain magnesium oxide particles, wherein the calcinating temperature is 900-980 DEG C and the calcinating time is 2-4 hours; and crushing and grading the magnesium oxide particles so as to obtain high-viscosity silicon-steel magnesium oxide. The method disclosed by the invention has the beneficial effect that through controlling water for hydration and improving a drying process, the automation level of a production process can be improved, and on the premise of no change of important indexes such as hydration rate, the viscosity of silicon-steel magnesium oxide is improved.
Description
Technical field
The present invention relates to magnesium oxide technical field, especially relate to a kind of magnesian reactor of high silicon steel level and preparation method thereof of preparing.
Background technology
Silicon steel level magnesium oxide is mainly used in the production of oriented silicon steel, for making ferrous metal atom become order orientation to arrange, on the surface of siliconized plate, form good insulating film simultaneously, first magnesian effect is the high temperature annealing separant in manufacturing as siliconized plate, it possesses again the effect that forms magnesium silicate glass body insulating coating with silicon simultaneously, and it can remove the impurity such as sulphur and phosphorus in silicon steel again in pyroreaction.
The magnesian slurries of silicon steel level are eager to excel to the agglutinating value(of coal) on siliconized plate surface, make can not come off from steel disc after strong vibration and friction.Development along with oriented silicon steel chip technology, the magnesian demand of silicon steel level that market is greater than 50cp to viscosity is also increasing, yet traditional high viscosity magnesium oxide Mg content is low, aquation rate is high, coating property is poor, cannot reach the technical requirements that oriented silicon steel disc is produced.
Summary of the invention
The present invention, for solving the problems of the technologies described above, is to provide a kind of and can prepares magnesian reactor of high-viscosity silicon-steel grade and preparation method thereof.
Technical problem solved by the invention can realize by the following technical solutions:
A kind of magnesian reactor of high-viscosity silicon-steel grade of preparing, comprise tank body, on described tank body, be provided with master control system, on described tank body, be provided with water-in, on described water-in, be provided with magnetization device, described magnetization device is connected with described master control system.Active water obtains magnetized active water after described magnetization device is processed.
As preferred technical scheme, in described tank body, be provided with electric heater unit, described electric heater unit is connected with described master control system.Described master control system is set described electric heater unit and the temperature of the magnetized active water in described tank body is controlled to 80 ~ 90 ℃.
As preferred technical scheme, in described tank body, be provided with whipping appts, described whipping appts is connected with described master control system.
As preferred technical scheme, described whipping appts is electromagnetic mixing apparatus or mechanical stirring device, described electromagnetic mixing apparatus is connected with described master control system, is convenient to stir in hydro-combination process, and guarantees magnesium oxide powder, tensio-active agent and active water sufficient reacting.
Above-mentioned reactor is prepared a high-viscosity silicon-steel grade method of magnesium oxide, comprises the following steps:
(a) magnesium oxide powder and tensio-active agent are put into reactor, and add active water to carry out hydration reaction, the temperature of hydration reaction is 80-90 ℃, and the time of hydration reaction is 1 ~ 2 hour; The weight of wherein said tensio-active agent is the 1%-5% of described magnesia powder body weight;
(b) product after hydration reaction in step a is carried out to separation, washing, the dry magnesium hydroxide that obtains;
(c) magnesium hydroxide step b being made is put into high temperature converter, adopts the calcining of dynamic calcining method, and calcining temperature is 900-980 ℃, and calcination time is 2 ~ 4 hours, obtains magnesium oxide particle, through crushing and classification, obtains high-viscosity silicon-steel grade magnesium oxide.
As preferred technical scheme, the described active water in step a is magnetized active water.
As preferred technical scheme, the hydration reaction time in step a is 1-1.5 hour.
As preferred technical scheme, in step b, washing adopts ultrasonic unit.
As preferred technical scheme, the dry microwave device that adopts in step b.
As preferred technical scheme, the calcination time in step c is 3-4 hour.
The beneficial effect that the present invention has is:
(1) preparation method of the present invention is simple, and cost is low, is suitable for suitability for industrialized production;
(2) the present invention, by controlling hydration water, improving drying process, can improve the automatization level of production process, in important indicators such as guaranteeing aquation rate, does not change under prerequisite, has improved the magnesian viscosity of silicon steel level, more than 80CP.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is the structural representation of the magnesian reactor of a kind of high-viscosity silicon-steel grade of the present invention;
Wherein: 1-tank body, 2-master control system, 3-magnetization device, 4-whipping appts, 5-electric heater unit.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Shown in Fig. 1, a kind of method for preparing high-viscosity silicon-steel grade magnesium oxide, comprises the following steps:
Step 1: a certain amount of magnesium oxide powder is added in reactor, and add magnetized active water and tensio-active agent to carry out hydration reaction, the temperature of hydration reaction is 80-90 ℃, and the time of hydration reaction is 1 ~ 2 hour, preferably 1 ~ 1.5 hour; The weight of wherein said tensio-active agent is the 1%-5% of described magnesia powder body weight;
Step 2: the product after step 1 hydration is carried out to separation, washing, the dry magnesium hydroxide that obtains;
Step 3: the magnesium hydroxide that step 2 is made adds a high temperature converter, adopts the calcining of dynamic calcining method, and calcining temperature is controlled at 900 ~ 980 ℃, and calcination time is within 2 ~ 4 hours, to obtain magnesium oxide particle, and preferably calcination time is 3 ~ 4 hours; Through crushing and classification, be packaged to be high-viscosity silicon-steel grade magnesium oxide.
Wherein, more than in step 1 reactor, the temperature of active water need remain on 80 degree, the time that can shorten, to control magnesium hydroxide particle diameter, is controlled magnesium hydroxide crystal formation preferably.
The present invention adopts active water and tensio-active agent to carry out hydration reaction, has effectively improved the activity of water, and particularly dissolving power strengthens greatly.Therefore, the salt of fouling is soluble in water, has stoped calcium magnesium crystalline material at surperficial crystalline deposit.Meanwhile, through in magnetized water, calcium, magnesium plasma xln also change, and magnetic field impels charging particle movement in water to change, and bonding strength is destroyed, and xln becomes tiny particle, is loose meter Liu Ti throw out, contributes to the stable lifting of technique.The active water that the present invention obtains the water that participates in hydration reaction after magnetization, can be better and the hydration of industrial magnesium oxide powder, improves the activity of hydrated product.
In step 2, adopt ultrasonic generator to wash, by adopting ultrasonic generator to produce vibration, further guarantee quality and the speed of washing.
In step 2, adopt microwave generating apparatus to be dried, microwave has the function that is penetrated into material inside, this penetrance of microwave makes the microwave material that is dried when material is dried the same outside and inside, almost there is no thermograde, compare traditional drying means, further guarantee the controlled and drying effect of dry process.
Step 3 is adjusted to 900 ~ 980 ℃ by high temperature converter temperature, controls calcining temperature and can reduce the adhesion between particle, guarantees the essential crystal formation defect of its high viscosity and rational size distribution.Use after high temperature converter simultaneously, can realize serialization and produce, be easy to industrialization.
With reference to shown in 2, the magnesian reactor of a kind of high-viscosity silicon-steel grade, comprises tank body 1, on described tank body 1, is provided with master control system 2, magnetization device 3, whipping appts 4, electric heater unit 5.Master control system 2 respectively with magnetization device 3, whipping appts 4, electric heater unit 5 is connected.Magnetization device 3 is arranged on the water-in of tank body 1, and active water obtains magnetized active water after magnetization device 3 is processed; Electric heater unit 4 is arranged in tank body 1, and master control system 2 is set electric heater units 4 and through magnetized active water heating, is controlled at 80 ~ 90 ℃ by tank body 1 is interior.In tank body 1, be provided with whipping appts 5, whipping appts 5 adopts electromagnetic mixing apparatus or mechanical stirring device; Be convenient to stir in hydro-combination process; Further guarantee magnesium oxide powder, tensio-active agent and active water sufficient reacting.
After utilizing silicon steel level magnesium oxide that the present invention produces to test by the macromolecular material industry test point of China Shanghai Text Centre, the test result of survey report (No. 2012-0092) is as follows:
| Test event | Unit | Test value |
| Viscosity | mPa·s | 90 |
Utilize silicon steel level magnesium oxide performance that the present invention produces can and the silicon dioxde reaction on traditional silicon-steel magnesium oxide and oriented silicon steel disc surface form fine and close forsterite type insulating film and match in excellence or beauty.The present invention can solve traditional silicon grade of steel magnesium oxide viscosity (20～50CP) on the low side, cannot adapt to part silicon sheet Plant to Production requirement more than magnesium oxide viscosity 80CP.Utilize product prepared by the present invention to keep the MgO content of product to reach more than 98%, aquation rate and screening characteristics still can reach the requirement that siliconized plate is produced.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. prepare the magnesian reactor of high-viscosity silicon-steel grade for one kind, comprise tank body, on described tank body, be provided with master control system, on described tank body, be provided with water-in, it is characterized in that, on described water-in, be provided with magnetization device, described magnetization device is connected with described master control system.
2. the magnesian reactor of a kind of high-viscosity silicon-steel grade according to claim 1, is characterized in that, in described tank body, is provided with electric heater unit, and described electric heater unit is connected with described master control system.
3. the magnesian reactor of a kind of high-viscosity silicon-steel grade according to claim 1, is characterized in that, in described tank body, is provided with whipping appts, and described electromagnetic mixing apparatus is connected with described master control system.
4. the magnesian reactor of a kind of high-viscosity silicon-steel grade according to claim 3, is characterized in that, described whipping appts is electromagnetic mixing apparatus or mechanical stirring device.
5. right to use requires the arbitrary claim reactor of 1-4 to prepare a high-viscosity silicon-steel grade method of magnesium oxide, it is characterized in that, comprises the following steps:
(a) magnesium oxide powder and tensio-active agent are put into reactor, and add active water to carry out hydration reaction, the temperature of hydration reaction is 80-90 ℃, and the time of hydration reaction is 1 ~ 2 hour; The weight of wherein said tensio-active agent is the 1%-5% of described magnesia powder body weight;
(b) product after hydration reaction in step a is carried out to separation, washing, the dry magnesium hydroxide that obtains;
(c) magnesium hydroxide step b being made is put into high temperature converter, adopts the calcining of dynamic calcining method, and calcining temperature is 900-980 ℃, and calcination time is 2 ~ 4 hours, obtains magnesium oxide particle, through crushing and classification, obtains high-viscosity silicon-steel grade magnesium oxide.
6. the high-viscosity silicon-steel grade method of magnesium oxide of preparing according to claim 5, is characterized in that, the described active water in step a is magnetized active water.
7. the high-viscosity silicon-steel grade method of magnesium oxide of preparing according to claim 5, is characterized in that, the hydration reaction time in step a is 1-1.5 hour.
8. the high-viscosity silicon-steel grade method of magnesium oxide of preparing according to claim 5, is characterized in that, in step b, washing adopts ultrasonic unit.
9. the high-viscosity silicon-steel grade method of magnesium oxide of preparing according to claim 5, is characterized in that, the dry microwave device that adopts in step b.
10. the high-viscosity silicon-steel grade method of magnesium oxide of preparing according to claim 5, is characterized in that, the calcination time in step c is 3-4 hour.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104709927A (en) * | 2014-12-30 | 2015-06-17 | 上海实业振泰化工有限公司 | Preparation method of silicon-steel grade magnesium oxide |
| CN106644827A (en) * | 2016-09-26 | 2017-05-10 | 武汉钢铁股份有限公司 | Method for judging magnesium oxide agglomeration and hydration state in silicon steel magnesium oxide coating solution |
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| US4443425A (en) * | 1981-12-09 | 1984-04-17 | Calgon Corporation | Magnesium oxide composition for coating silicon steel |
| CN2709427Y (en) * | 2003-12-12 | 2005-07-13 | 周东植 | Water magnetization device |
| CN1680191A (en) * | 2004-04-09 | 2005-10-12 | 吴太洲 | Production of industrial magnesium hydroxide |
| CN101559962A (en) * | 2009-05-27 | 2009-10-21 | 上海实业振泰化工有限公司 | Method for preparing high-viscosity silicon-steel grade magnesium oxide |
| CN102659146A (en) * | 2012-04-28 | 2012-09-12 | 中国科学院福建物质结构研究所 | Method for preparing flame retardant magnesium hydroxide |
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2012
- 2012-12-04 CN CN201210513714.3A patent/CN103523807A/en active Pending
Patent Citations (5)
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| US4443425A (en) * | 1981-12-09 | 1984-04-17 | Calgon Corporation | Magnesium oxide composition for coating silicon steel |
| CN2709427Y (en) * | 2003-12-12 | 2005-07-13 | 周东植 | Water magnetization device |
| CN1680191A (en) * | 2004-04-09 | 2005-10-12 | 吴太洲 | Production of industrial magnesium hydroxide |
| CN101559962A (en) * | 2009-05-27 | 2009-10-21 | 上海实业振泰化工有限公司 | Method for preparing high-viscosity silicon-steel grade magnesium oxide |
| CN102659146A (en) * | 2012-04-28 | 2012-09-12 | 中国科学院福建物质结构研究所 | Method for preparing flame retardant magnesium hydroxide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104709927A (en) * | 2014-12-30 | 2015-06-17 | 上海实业振泰化工有限公司 | Preparation method of silicon-steel grade magnesium oxide |
| CN106644827A (en) * | 2016-09-26 | 2017-05-10 | 武汉钢铁股份有限公司 | Method for judging magnesium oxide agglomeration and hydration state in silicon steel magnesium oxide coating solution |
| CN106644827B (en) * | 2016-09-26 | 2019-03-15 | 武汉钢铁有限公司 | A method of differentiating magnesia reunion and hydrated state in silicon-steel magnesium oxide masking liquid |
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Application publication date: 20140122 |