CN102534196A - Chlorination process for pressing magnesite into balls through light burning dry method - Google Patents
Chlorination process for pressing magnesite into balls through light burning dry method Download PDFInfo
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- CN102534196A CN102534196A CN2010105871782A CN201010587178A CN102534196A CN 102534196 A CN102534196 A CN 102534196A CN 2010105871782 A CN2010105871782 A CN 2010105871782A CN 201010587178 A CN201010587178 A CN 201010587178A CN 102534196 A CN102534196 A CN 102534196A
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Abstract
The invention discloses a process method for pressing magnesite into balls through a light burning dry method to carry out chlorination production of anhydrous magnesium chloride melt. According to the method, the magnesite is subjected to light burning through a furnace kiln; a carbonaceous reducing agent and a dried industrial salt additive are added according to a certain ratio; a mill is adopted to grind into a mixed powder material; the mixed powder material is directly pressed into a briquette through a ball pressing machine; the briquette is conveyed to a chlorination furnace, and reacts with the introduced chlorine gas at a high temperature of 800-1000 DEG C to produce the magnesium chloride melt. Compared to the prior art, the process of the present invention has the following advantages that: the productivity of the chlorination furnace can be improved, the chlorine gas utilization rate can be improved, and the electricity consumption of the chlorination furnace can be reduced.
Description
Technical field
The present invention relates to a kind of is that raw material makes molten magnesium chloride is produced MAGNESIUM METAL 99 again through electrolysis process method through chlorination with magnesite, particularly relates to a kind of magnesite makes molten magnesium chloride through chlorination method.
Background technology
Use now magnesite to make the Magnesium Chloride Anhydrous melt that electrolysis uses through chlorination and mainly contain 3 kinds of technologies as raw material:
One of which; For magnesite is done group's chloridization process; It is to carry out broken abrasive dust respectively with magnesite with as the refinery coke of reductive agent, batching according to a certain percentage then, and add an amount of pitch and make caking agent; After fully stirring mixed pinching, be pressed into agglomerate, send chlorination furnace to carry out chlorination and make the Magnesium Chloride Anhydrous melt.Be characterized in that this agglomerate is prone to collapse soft phenomenon in chlorination furnace, make bed permeability poor, yield poorly, chlorine utilization is low; The frequent blocking pipe of pitch volatile matter, furnace gas escapes contaminate environment etc.;
Its two, be the using magnesite granule chloridization process, it is to be that 3 to 15mm refinery coke directly adds chlorination furnace and carries out chlorination and make the Magnesium Chloride Anhydrous melt after batch mixes with 10 to 30mm particulate state magnesite and granularity.The ventilation property and the operating environment that are characterized in chlorination furnace are improved, but the production capacity of chlorination furnace and chlorine utilization are still lower;
They are three years old; For the light-burned bittern of magnesite solidifies the balling-up chloridization process; It is to carry out broken abrasive dust respectively with the magnesite after light-burned with as the refinery coke of reductive agent; Prepare burden according to a certain percentage then, and add an amount of bittern curing system ball, pelletizing send chlorination furnace to carry out chlorination after oven dry and makes the Magnesium Chloride Anhydrous melt.Be characterized in the good permeability of chlorination furnace, production capacity is high, good operational environment, and power consumption is lower.But the pelletizing after the oven dry still contains 10%～20% moisture, and the part of these water will combine with chlorine to generate HCl in chlorination furnace, and the consumption of chlorine is increased, and has reduced the utilization ratio of chlorine, and the evaporation of moisture also will consume the part heat in the stove in addition.
Summary of the invention
The technical problem that the present invention will solve is: the light-burned dry method of a kind of magnesite compacting balling-up chloridization process is provided, to overcome prior art chlorination furnace production capacity that exists and deficiencies such as chlorine utilization is low.
The present invention is achieved in that magnesite allocates carbonaceous reducing agent and dried Industrial Salt (NaCl) additive into after light-burned; Grind into mixed powder then; Be pressed into agglomerate through ball press, this agglomerate sent into chlorination furnace under 800～1000 ℃ high temperature, produce the magnesium chloride melt with the chlorine reaction that feeds.
In the above-mentioned technology, also can earlier magnesite be ground into powder, mixed powder is evenly processed with powdery carbonaceous reducing agent and dried Industrial Salt (NaCl) additives mixed in light-burned again back.
In making processes, its total moisture content of agglomerate that is pressed into through ball press is no more than 2%.
Carbonaceous reducing agent and dried Industrial Salt (NaCl) additive are allocated (mass ratio) in following ratio:
C/MgO=0.2～0.3
NaCl/(MgO+C)=0.02～0.05
The invention has the beneficial effects as follows: the present invention improves the preparation and the balling-up mode of chlorination furnace furnace charge, makes furnace charge that higher activity arranged, and each component of furnace charge mixes and combines closely, and water cut is few in the furnace charge.Compare with existing procedure, adopt the light-burned dry method compacting of magnesite balling-up chloridization process, can improve the chlorination furnace production capacity, improve chlorine utilization, reduce the power consumption of chlorination furnace.
Description of drawings
Fig. 1: schematic flow sheet of the present invention.
Embodiment
Embodiments of the invention: allocate carbonaceous reducing agent and dried NaCl additive after magnesite is light-burned into; Grind into mixed powder then; Be pressed into agglomerate through ball press, this agglomerate sent into chlorination furnace produce the magnesium chloride melt at 800～1000 ℃ the following and chlorine reaction that feeds.
In the above-mentioned technology, also can earlier magnesite be ground into powder, mixed powder is evenly processed with powdery carbonaceous reducing agent and dried NaCl additives mixed in light-burned again back.
In making processes, considerably less through the agglomerate moisture content that ball press is pressed into, its total moisture content is no more than 2%.
Carbonaceous reducing agent and dried NaCl additive are allocated (mass ratio) in following ratio:
C/MgO=0.2～0.3
NaCl/(MgO+C)=0.02～0.05。
Claims (1)
1. the light-burned dry method of magnesite is suppressed the balling-up chloridization process; It is characterized in that: allocate carbonaceous reducing agent and dried Industrial Salt additive after magnesite is light-burned into; Grind into mixed powder then; Be pressed into agglomerate through ball press, this agglomerate sent into chlorination furnace under 800～1000 ℃ high temperature, produce the magnesium chloride melt with the chlorine reaction that feeds.
2. the light-burned dry method compacting of magnesite according to claim 1 balling-up chloridization process; It is characterized in that: also can earlier magnesite be ground into powder, mixed powder is evenly processed with powdery carbonaceous reducing agent and dried Industrial Salt additives mixed in light-burned again back.
3. the light-burned dry method compacting of magnesite according to claim 1 and 2 balling-up chloridization process, it is characterized in that: in making processes, its total moisture content of agglomerate that is pressed into through ball press is no more than 2%.
4. the light-burned dry method compacting of magnesite according to claim 1 and 2 balling-up chloridization process, it is characterized in that: the mass ratio of allocating into of powdery carbonaceous reducing agent and dried Industrial Salt additive is:
C/MgO=0.2～0.3
NaCl/(MgO+C)=0.02～0.05。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105871782A CN102534196A (en) | 2010-12-14 | 2010-12-14 | Chlorination process for pressing magnesite into balls through light burning dry method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105871782A CN102534196A (en) | 2010-12-14 | 2010-12-14 | Chlorination process for pressing magnesite into balls through light burning dry method |
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| CN102534196A true CN102534196A (en) | 2012-07-04 |
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| CN2010105871782A Pending CN102534196A (en) | 2010-12-14 | 2010-12-14 | Chlorination process for pressing magnesite into balls through light burning dry method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195329A (en) * | 2014-08-21 | 2014-12-10 | 东北大学 | Preparation method of magnesite powder briquetting binding agent |
| CN112176201A (en) * | 2020-08-21 | 2021-01-05 | 后英集团海城市水泉滑石矿有限公司 | Comprehensive utilization method of low-grade magnesite |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4563339A (en) * | 1984-03-06 | 1986-01-07 | Council Of Scientific And Industrial Research | Process for the preparation of magnesium chloride for use as an electrolyte in electrolytic production of magnesium metal |
| CN85102273A (en) * | 1985-04-01 | 1986-09-17 | 郑州轻金属研究所 | The method of Magnesium Chloride Anhydrous is produced in the chlorination of magnesite pelletizing |
| CN1030559A (en) * | 1987-07-15 | 1989-01-25 | 挪威海德罗公司 | Produce the method for magnesium chloride |
| CN1146757A (en) * | 1994-05-17 | 1997-04-02 | 诺兰大冶炼公司 | Preparation of anhydrous magnesium chloride-containing melts from hydrated magnesium chloride and production of magnesium metal |
| CA2373402A1 (en) * | 2001-02-27 | 2002-08-27 | Russian National Aluminium And Magnesium Institute (Vami) | Method of production of magnesium and chlorine from magnesium chloride solutions containing ammonium chloride |
| CN101759206A (en) * | 2009-12-29 | 2010-06-30 | 孙力厚 | Process for preparing magnesia with high purity |
-
2010
- 2010-12-14 CN CN2010105871782A patent/CN102534196A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4563339A (en) * | 1984-03-06 | 1986-01-07 | Council Of Scientific And Industrial Research | Process for the preparation of magnesium chloride for use as an electrolyte in electrolytic production of magnesium metal |
| CN85102273A (en) * | 1985-04-01 | 1986-09-17 | 郑州轻金属研究所 | The method of Magnesium Chloride Anhydrous is produced in the chlorination of magnesite pelletizing |
| CN1030559A (en) * | 1987-07-15 | 1989-01-25 | 挪威海德罗公司 | Produce the method for magnesium chloride |
| CN1146757A (en) * | 1994-05-17 | 1997-04-02 | 诺兰大冶炼公司 | Preparation of anhydrous magnesium chloride-containing melts from hydrated magnesium chloride and production of magnesium metal |
| CA2373402A1 (en) * | 2001-02-27 | 2002-08-27 | Russian National Aluminium And Magnesium Institute (Vami) | Method of production of magnesium and chlorine from magnesium chloride solutions containing ammonium chloride |
| CN101759206A (en) * | 2009-12-29 | 2010-06-30 | 孙力厚 | Process for preparing magnesia with high purity |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195329A (en) * | 2014-08-21 | 2014-12-10 | 东北大学 | Preparation method of magnesite powder briquetting binding agent |
| CN112176201A (en) * | 2020-08-21 | 2021-01-05 | 后英集团海城市水泉滑石矿有限公司 | Comprehensive utilization method of low-grade magnesite |
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Application publication date: 20120704 |