CN101244832A - Method for producing high purity large crystallization MgO sand with electric melting method - Google Patents
Method for producing high purity large crystallization MgO sand with electric melting method Download PDFInfo
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- CN101244832A CN101244832A CNA2007101589507A CN200710158950A CN101244832A CN 101244832 A CN101244832 A CN 101244832A CN A2007101589507 A CNA2007101589507 A CN A2007101589507A CN 200710158950 A CN200710158950 A CN 200710158950A CN 101244832 A CN101244832 A CN 101244832A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to a high purity large crystallization MgO sand production by electric melting method, which comprises the following steps: the light burned magnesia or magnesite is used as raw material and magnesia and MgO-C material are used as furnace lining, additive for removing impurity from the raw material is added to produce large crystallization MgO sand with purity of more than 98.5 percent by electrical fusion; the position of the electrode is automatically controlled and the electrode distance is adjustable; different second voltage is adopted at different electrical fusion producing period and feeding is automatically finished. Compared to the traditional production technology, the method has the following advantages: the large crystallization MgO sand purity can reach more than 98.5 percent, rising by 10 to 25 percent; the energy consumption is reduced by 150 to 500 kilowatt-hour/ ton sand, saving energy by more than 15 to 20 percent; the furnace yields reaches 10 to 12 ton/ furnace; the material consumption is lowered by 200 to 300 kg/ton; the economic benefit is increased by 2 to 3 times.
Description
Technical field
The present invention relates to the refractory materials production technical field, relating in particular to a kind of is raw material with light-burning magnesium powder or giobertite, the method for producing high purity large crystallization MgO sand with electric melting method.
Background technology
At present, in the electric molten magnesite industry, the most factories of the electric melting magnesium furnace of widespread use, enterprise are still the old-fashioned production method that adopts traditional electric melting magnesium furnace wire-hanging type wireline directly to hang electrode clamping electrode card head, and these production method existing problems are:
(1), electrode moves in lifting process easily, because material bed thickness difference causes electrode to produce tiltedly phenomenon, makes electric melting magnesium furnace process control difficulty.
(2), uncontrollable interelectrode distance, cause and cause the furnace shell accident of burning, financial loss is very big.
(3), hand-fed bed of material instability, be difficult to control the electric smelting whole process, to the operation hazard to person very big.
(4), transformer capacity is little, is generally 800-1600KVA, yields poorly, and is of poor quality, the power consumption height.
(5), whole molten stone roller section middle and upper part is the flake porous sand of Omasum, and is of poor quality, yields poorly the energy consumption height.
(4), energy consumption height, generally 2850-3000 degree/t. sand.
(5), the big 1800-2000kg/t. sand of starting material consumption.
(6), stove produces low 4500-5000kg/ stove.
(7), the low MgO98.5% of grade is above is 1-3%.
Summary of the invention
Defective at the prior art existence, the method that the purpose of this invention is to provide a kind of producing high purity large crystallization MgO sand with electric melting method, this method is a raw material with light-burning magnesium powder or giobertite, with magnesia and magnesium carbonaceous material is furnace lining, add the additive of removing impurity in the raw material again, produce big crystallization purity at the MgO sand more than 98.5%; Rise fall of electrodes is controlled automatically, and interelectrode distance is adjustable, produces in electric smelting and adopts different secondary voltages, automatic charging different periods.
The technology contents of the method for producing high purity large crystallization MgO sand with electric melting method of the present invention is described below:
A kind of method of producing high purity large crystallization MgO sand with electric melting method, it is characterized in that: this method is a raw material with light-burning magnesium powder or giobertite, with magnesia or magnesium carbonaceous material is furnace lining, adds the additive of removing impurity in the raw material again, obtains big crystallization purity at the MgO sand more than 98.5% with the electric smelting method;
The ingredient requirement of light-burning magnesium powder or giobertite wherein: in the raw material, MgO sand content 〉=94.5%, SiO
2≤ 1.0%, CaO≤1.3%; Granularity 1-6mm; The additive add-on is the 1-6% of raw material total amount.
The employing automatic feeder is reinforced; Adopt the rise fall of electrodes automatic control device to come the lifting electrode, and interelectrode distance is adjustable.
Different secondary voltages is adopted in ending period before sending electric starting the arc period, material melting period, blowing out; Sending electric starting the arc voltage in period is 90-160V, required time 1-2 hour, and interelectrode distance 200-700mm; Material melting voltage in period is 90-120V, required time 4-8 hour, and interelectrode distance 500-600mm; Ending voltage in period is 90-100V before the blowing out, required time 0.5-1.5 hour, and interelectrode distance 200-600mm.
This method is sending electric starting the arc interelectrode distance in period less, and material melting interelectrode distance in period is bigger, and ending interelectrode distance in period is less before the blowing out.
Compared with prior art, the invention has the beneficial effects as follows:
1) adopts the additive of removing impurity, increased the purification purification process, can effectively remove impurity, improve the grade of MgO sand.
2) adopt the rise fall of electrodes automatic control device to come the lifting electrode, and interelectrode distance is adjustable, can makes production process control more stable, improve the quality of product.
3) at different periods, adopt different voltage, time, spacing, make technological process science more, can reach conservation, energy-conservation, output is high, finished product is of high grade purpose.
4) adopt automatic feeder reinforced, make reinforced more even.
5) adopt magnesia or the magnesium carbonaceous material is a furnace lining, can play the effect of insulation, and avoid furnace shell to be burnt out, but conservation also.Improve the crystallization particle diameter, energy efficient.
Embodiment
Below by embodiment the present invention is described in further detail.
Embodiment 1
A kind of method of producing high purity large crystallization MgO sand with electric melting method, this method is a raw material with light-burning magnesium powder or giobertite, with magnesia or magnesium carbonaceous material is furnace lining, add the additive of removing impurity in the raw material again, to remove Ca, Fe, the impurity such as Al, Si in the raw material, obtain big crystallization purity at the MgO sand more than 98.5% with the electric smelting method.
The ingredient requirement of light-burning magnesium powder or giobertite wherein: in the raw material, MgO sand content 〉=94.5%, SiO
2≤ 1.0%, CaO≤1.3%; Granularity 1-6mm; Additive is oxide compound such as MgO, K
2O, nitrate such as KNO
3, muriate such as KCl, MgCL
2Fluorochemical such as NaF, MgF
2In one or more mixing; Its add-on is the 1-6% of raw material total amount.
This method adopts automatic feeder reinforced.This method adopts the rise fall of electrodes automatic control device to come the lifting electrode, and interelectrode distance is adjustable.
Electrode adopts three-phase electrode, and equilateral triangle is arranged.In ending period before sending electric starting the arc period, material melting period, blowing out, adopt different secondary voltages, different time, different interelectrode distance (slant ranges of 2 electrode centers points).
In transformer capacity is under the condition of 2400KV, and sending electric starting the arc voltage in period is 120V, 1.5 hours time, interelectrode distance 600mm; Material melting voltage in period is 100V, 6 hours time, interelectrode distance 550mm; Ending voltage in period is 100V, 1 hour time, interelectrode distance 500mm before the blowing out; This method is sending electric starting the arc interelectrode distance in period less, and material melting interelectrode distance in period is bigger, and ending interelectrode distance in period is less before the blowing out.
Embodiment 2
In transformer capacity is under the condition of 3200KV, and sending electric starting the arc voltage in period is 150V, 1 hour time, interelectrode distance 500mm; Material melting voltage in period is 110V, 5 hours time, interelectrode distance 600mm; Ending voltage in period is 90V, 0.5 hour time, interelectrode distance 550mm before the blowing out; All the other conditions are with implementing 1.
Embodiment 3
In transformer capacity is under the condition of 3200KV, and sending electric starting the arc voltage in period is 130V, 2 hours time, interelectrode distance 450mm; Material melting voltage in period is 100V, 5 hours time, interelectrode distance 600mm; Ending voltage in period is 95V, 0.6 hour time, interelectrode distance 500mm before the blowing out; All the other conditions are with implementing 1.
The present invention with raw material in the elevator conveyor is transported to electric furnace front upper place hopper, additive is delivered in another hopper of electric furnace front upper place, after mixing, garden dish mixing machine delivers to again in the electric furnace automatic charging equipment, cross range request by three different times electric smelting of electric melting magnesium furnace whole process, feed in raw material by the time with the computer computer-controlled program respectively, so, get operation so that electric melting magnesium furnace is well on.In addition, according to the requirement of electric melting magnesium furnace whole process, respectively with the different electric smelting process of computer control period, the different time of adjustable secondary voltage and interelectrode distance is operated, and finishes up to the electric smelting whole process again.Power failure is then carried out product and is arranged, cools off, breaks piece, sorting, finished product, detection.
Adopt the technology of the present invention:
1, with the light-burning magnesium powder is consumption of raw material such as the table 1 that raw material is smelted large crystallization MgO sand
2, with the light-burning magnesium powder be raw material, smelt the grade such as the table 2 of electric smelting large crystallization MgO sand
Table 1
| Sequence number | Technology category | Raw material consumption (kilogram) | Product (kilogram) |
| 1 | Prior art | 1800-2000 | 1000 |
| 2 | The present invention | 1500-1600 | 1000 |
Table 2
Claims (4)
1, a kind of method of producing high purity large crystallization MgO sand with electric melting method, it is characterized in that: this method is a raw material with light-burning magnesium powder or giobertite, with magnesia or magnesium carbonaceous material is furnace lining, add the additive of removing impurity in the raw material again, obtain big crystallization purity at the MgO sand more than 98.5% with the electric smelting method;
The ingredient requirement of light-burning magnesium powder or giobertite wherein: in the raw material, MgO sand content 〉=94.5%, SiO
2≤ 1.0%, CaO≤1.3%; Granularity 1-6mm; The additive add-on is the 1-6% of raw material total amount.
2, the method for producing high purity large crystallization MgO sand with electric melting method according to claim 1 is characterized in that: this method adopts automatic feeder reinforced.
3, the method for producing high purity large crystallization MgO sand with electric melting method according to claim 1 is characterized in that: this method adopts the rise fall of electrodes automatic control device to come the lifting electrode, and interelectrode distance is adjustable.
4, the method for producing high purity large crystallization MgO sand with electric melting method according to claim 3 is characterized in that: different secondary voltages is adopted in ending period before sending electric starting the arc period, material melting period, blowing out; Sending electric starting the arc voltage in period is 90-160V, required time 1-2 hour, and interelectrode distance 200-700mm; Material melting voltage in period is 90-120V, required time 4-8 hour, and interelectrode distance 500-600mm; Ending voltage in period is 90-100V before the blowing out, required time 0.5-1.5 hour, and interelectrode distance 200-600mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101589507A CN101244832A (en) | 2007-12-17 | 2007-12-17 | Method for producing high purity large crystallization MgO sand with electric melting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101589507A CN101244832A (en) | 2007-12-17 | 2007-12-17 | Method for producing high purity large crystallization MgO sand with electric melting method |
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| CN101244832A true CN101244832A (en) | 2008-08-20 |
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| CNA2007101589507A Pending CN101244832A (en) | 2007-12-17 | 2007-12-17 | Method for producing high purity large crystallization MgO sand with electric melting method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562921B (en) * | 2009-04-20 | 2011-06-22 | 成都高威节能科技有限公司 | Method for treating arching problem of charging by automatic control system of yellow phosphorus furnace electrode |
| CN102706135A (en) * | 2012-06-20 | 2012-10-03 | 柳州市金螺机械有限责任公司 | Ore smelting furnace |
| CN107244818A (en) * | 2017-06-09 | 2017-10-13 | 张世东 | The method of the big crystallization fused magnesite of One-step production |
| CN115557521A (en) * | 2022-10-14 | 2023-01-03 | 辽宁嘉顺科技有限公司 | Method for controlling impurity migration in fused magnesium preparation process and electrode angle adjusting device |
-
2007
- 2007-12-17 CN CNA2007101589507A patent/CN101244832A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562921B (en) * | 2009-04-20 | 2011-06-22 | 成都高威节能科技有限公司 | Method for treating arching problem of charging by automatic control system of yellow phosphorus furnace electrode |
| CN102706135A (en) * | 2012-06-20 | 2012-10-03 | 柳州市金螺机械有限责任公司 | Ore smelting furnace |
| CN107244818A (en) * | 2017-06-09 | 2017-10-13 | 张世东 | The method of the big crystallization fused magnesite of One-step production |
| CN115557521A (en) * | 2022-10-14 | 2023-01-03 | 辽宁嘉顺科技有限公司 | Method for controlling impurity migration in fused magnesium preparation process and electrode angle adjusting device |
| CN115557521B (en) * | 2022-10-14 | 2023-11-10 | 辽宁嘉顺科技有限公司 | Method for controlling impurity migration in fused magnesium melting preparation process and electrode angle adjusting device |
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Open date: 20080820 |