CN103145159B - Production process of magnesium chloride granules - Google Patents
Production process of magnesium chloride granules Download PDFInfo
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- CN103145159B CN103145159B CN201310099090.XA CN201310099090A CN103145159B CN 103145159 B CN103145159 B CN 103145159B CN 201310099090 A CN201310099090 A CN 201310099090A CN 103145159 B CN103145159 B CN 103145159B
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Abstract
The invention discloses a production process of magnesium chloride granules. The production process comprises the following steps of: crushing crystallized magnesium chloride, then, placing the crushed magnesium chloride into a dissolving tank, stirring the crushed magnesium chloride, then, standing for settlement, inspecting the baume degree of the liquid not to be lower than 33.5Be', and primarily filtering the liquid in the dissolving tank to obtain primary filtrate magnesium chloride; naturally settling the primary filtrate magnesium chloride for at least three days, then, sequentially placing the primary filtrate magnesium chloride into a two-effect separator and a one-effect separator to carry out steam-liquid separation to obtain liquid magnesium chloride; and delivering the liquid magnesium chloride to a dust-free pelleting chamber through a pipeline to pellet to obtain finished products of the magnesium chloride granules. The method is advanced in process design, strong in operability, controllable in process parameter and capable of realizing large-scale industrial production; the prepared product is high in purity and capable of meeting the requirement of a high-quality product; the magnesium chloride granules are high in dissolving speed and clear, transparent and free of impurities after being dissolved; and an automatic production line is adopted, and the product is high in stacking density and not easy to air slake.
Description
Technical field
The present invention relates to a kind of production technique of magnesium chloride granules.
Background technology
The magnesium chloride that in prior art, magnesium chloride production technique is produced mostly is chlorination magnesium sheet, and this chlorination magnesium sheet content is low, and impurity is many, and dissolution rate is slow, affects service efficiency, causes extend man-hour, has impurity after dissolving, need to precipitate and filter.And most employing entirely manually produced, the packing of weighing by hand, production efficiency is low.Product has corner angle, easily occurs bale broken in transportation, and product area is larger, cannot accomplish evenly to mix with other products.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of method reasonable in design, workable, the production technique of a kind of magnesium chloride granules that the product purity of producing is high, easy to use.
Technical problem to be solved by this invention is to realize by following technical scheme.The present invention is a kind of production technique of magnesium chloride granules, is characterized in, its step is as follows:
(1) dissolving crystallized: injected water in dissolving tank, open motorized valve; After crystallization magnesium chloride is pulverized with pulverizer, through conveying belt, drop in dissolving tank, the input weight ratio of crystallization magnesium chloride and water is: 1300 ~ 1400:600 kg/L, stir 10 ~ 15 minutes, staticly settle 5 ~ 10 minutes, check that liquid degree Beaume is not less than 33.5 Be ', degree Beaume does not reach while requiring, and adds and throws appropriate crystallization magnesium chloride until liquid degree Beaume reaches requirement;
(2) initial filter, carries out initial filter to the liquid in dissolving tank, removes impurity and precipitation, obtains initial filter liquid magnesium chloride;
(3) secondary filter: by initial filter liquid magnesium chloride natural subsidence after at least 3 days, drop into successively 2 accurate filters and carry out secondary filter, accurate filter pressure 0.07 ~ 0.08Mpa during secondary filter, and the filtration precision of First accurate filter is 0.4 ~ 0.5 μ m, the filtration precision of second accurate filter is 0.15 ~ 0.25 μ m; Secondary filter makes liquid magnesium chloride;
(4) evaporation: liquid magnesium chloride is established in preheater and is preheated to 50 ~ 100 ℃, then enter and enter two effect separators after 2nd effect evaporator heating and carry out vapor-liquid separation, two effect separators go out liquid temp 70-110 ℃, vapor temperature is controlled at 80 ~ 125 ℃, the vacuum degree control of two effect separators is at-0.05 ~-0.09Mpa, liquid after separation enters and enters an effect separator after 1st effective evaporator heating again and carry out vapor-liquid separation again, the liquid temp that goes out of one effect separator is 130 ~ 140 ℃, the vapor temperature of one effect separator is controlled at 140 ~ 170 ℃, the vacuum degree control of one effect separator is at-0.05 ~-0.09Mpa, vapor-liquid separation by an effect separator obtains liquid magnesium chloride,
(5) liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying liquid magnesium chloride, and the temperature of pipeline is controlled at 130 ~ 160 ℃, makes finished product magnesium chloride granules.
In a kind of magnesium chloride production technology scheme of the present invention, further preferred technical scheme or technical characterictic are as follows:
1. in step (1): the input weight ratio of crystallization magnesium chloride and water is preferably: 1350:600 kg/L.
2. in step (3), the filtration precision of First accurate filter is preferably 0.45 μ m, and the filtration precision of second accurate filter is preferably 0.2 μ m.
3. in step (5), the granularity of the finished product magnesium chloride granules making is preferably 50 ~ 70 orders, more preferably 60 orders.
Compared with prior art, technical solution of the present invention has the following advantages:
One, the inventive method technological design is advanced, and workable, processing parameter is controlled, can realize industrialized production;
Two, can directly to use Qinghai mineral products crystallization be raw material to the inventive method, and raw material is sufficient, and Quality Safety is reliable;
Three, the product purity that the inventive method is produced is high, can reach superior product requirement; It dissolves fast, can use on dissolving limit, limit clear after dissolving, inclusion-free; Adopt automatic production line, reduce external contamination, product tap density is little, saves transport space, and is difficult for deliquescence, and product is 50-70 order flow particles, can directly under solid form, use with other Product mixes.
Embodiment
Below further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Embodiment 1, a kind of production technique of magnesium chloride granules, and its step is as follows:
(1) dissolving crystallized: injected water in dissolving tank, open motorized valve; After crystallization magnesium chloride is pulverized with pulverizer, through conveying belt, drop in dissolving tank, the input weight ratio of crystallization magnesium chloride and water is: 1300:600 kg/L, stir 10 minutes, staticly settle 5 minutes, check that liquid degree Beaume is not less than 33.5 Be ', degree Beaume does not reach while requiring, and adds and throws appropriate crystallization magnesium chloride until liquid degree Beaume reaches requirement;
(2) initial filter, carries out initial filter to the liquid in dissolving tank, removes impurity and precipitation, obtains initial filter liquid magnesium chloride;
(3) secondary filter: by initial filter liquid magnesium chloride natural subsidence after at least 3 days, drop into successively 2 accurate filters and carry out secondary filter, accurate filter pressure 0.07Mpa during secondary filter, and the filtration precision of First accurate filter is 0.4 μ m, the filtration precision of second accurate filter is 0.15 μ m; Secondary filter makes liquid magnesium chloride;
(4) evaporation: liquid magnesium chloride is established in preheater and is preheated to 50 ℃, then enter and enter two effect separators after 2nd effect evaporator heating and carry out vapor-liquid separation, two effect separator fluid temperature 70 Cs, vapor temperature is controlled at 80 ℃, the vacuum degree control of two effect separators is at-0.05Mpa, liquid after separation enters and enters an effect separator after 1st effective evaporator heating again and carry out vapor-liquid separation again, the liquid temp that goes out of one effect separator is 130 ℃, the vapor temperature of one effect separator is controlled at 140 ℃, the vacuum degree control of one effect separator is at-0.05Mpa, vapor-liquid separation by an effect separator obtains liquid magnesium chloride,
(5) liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying liquid magnesium chloride, and the temperature of pipeline is controlled at 130 ℃, and making product grading is 50 order magnesium chloride granules.
Embodiment 2, a kind of production technique of magnesium chloride granules, and its step is as follows:
(1) dissolving crystallized: injected water in dissolving tank, open motorized valve; After crystallization magnesium chloride is pulverized with pulverizer, through conveying belt, drop in dissolving tank, the input weight ratio of crystallization magnesium chloride and water is: 1400:600 kg/L, stir 15 minutes, staticly settle 10 minutes, check that liquid degree Beaume is not less than 33.5Be ', degree Beaume does not reach while requiring, and adds and throws appropriate crystallization magnesium chloride until liquid degree Beaume reaches requirement;
(2) initial filter, carries out initial filter to the liquid in dissolving tank, removes impurity and precipitation, obtains initial filter liquid magnesium chloride;
(3) secondary filter: by initial filter liquid magnesium chloride natural subsidence after at least 3 days, drop into successively 2 accurate filters and carry out secondary filter, accurate filter pressure 0.08Mpa during secondary filter, and the filtration precision of First accurate filter is 0.5 μ m, the filtration precision of second accurate filter is 0.25 μ m; Secondary filter makes liquid magnesium chloride;
(4) evaporation: liquid magnesium chloride is established in preheater and is preheated to 100 ℃, then enter and enter two effect separators after 2nd effect evaporator heating and carry out vapor-liquid separation, two effect separators go out 110 ℃ of liquid temps, vapor temperature is controlled at 125 ℃, the vacuum degree control of two effect separators is at 0.09Mpa, liquid after separation enters and enters an effect separator after 1st effective evaporator heating again and carry out vapor-liquid separation again, the liquid temp that goes out of one effect separator is 140 ℃, the vapor temperature of one effect separator is controlled at 170 ℃, the vacuum degree control of one effect separator is at 0.09Mpa, vapor-liquid separation by an effect separator obtains liquid magnesium chloride,
(5) liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying liquid magnesium chloride, and the temperature of pipeline is controlled at 160 ℃, and making product grading is 70 order magnesium chloride granules.
Embodiment 3, a kind of production technique of magnesium chloride granules, and its step is as follows:
(1) dissolving crystallized: injected water in dissolving tank, open motorized valve; After crystallization magnesium chloride is pulverized with pulverizer, through conveying belt, drop in dissolving tank, the input weight ratio of crystallization magnesium chloride and water is: 1350:600 kg/L, stir 12 minutes, staticly settle 8 minutes, check that liquid degree Beaume is not less than 33.5 Be ', degree Beaume does not reach while requiring, and adds and throws appropriate crystallization magnesium chloride until liquid degree Beaume reaches requirement;
(2) initial filter, carries out initial filter to the liquid in dissolving tank, removes impurity and precipitation, obtains initial filter liquid magnesium chloride;
(3) secondary filter: by initial filter liquid magnesium chloride natural subsidence after at least 3 days, drop into successively 2 accurate filters and carry out secondary filter, accurate filter pressure 0.075Mpa during secondary filter, and the filtration precision of First accurate filter is 0.45 μ m, the filtration precision of second accurate filter is 0.20 μ m; Secondary filter makes liquid magnesium chloride;
(4) evaporation: liquid magnesium chloride is established in preheater and is preheated to 75 ℃, then enter and enter two effect separators after 2nd effect evaporator heating and carry out vapor-liquid separation, two effect separators go out 90 ℃ of liquid temps, vapor temperature is controlled at 100 ℃, the vacuum degree control of two effect separators is at-0.07Mpa, liquid after separation enters and enters an effect separator after 1st effective evaporator heating again and carry out vapor-liquid separation again, the liquid temp that goes out of one effect separator is 135 ℃, the vapor temperature of one effect separator is controlled at 155 ℃, the vacuum degree control of one effect separator is at-0.07Mpa, vapor-liquid separation by an effect separator obtains liquid magnesium chloride,
(5) liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying liquid magnesium chloride, and the temperature of pipeline is controlled at 150 ℃, and making product grading is 60 order magnesium chloride granules.
Claims (5)
1. a production technique for magnesium chloride granules, is characterized in that, its step is as follows:
(1) dissolving crystallized: injected water in dissolving tank, open motorized valve; After crystallization magnesium chloride is pulverized with pulverizer, through conveying belt, drop in dissolving tank, the input weightmeasurement ratio of crystallization magnesium chloride and water is: 1300～1400:600kg/L, stir 10～15 minutes, staticly settle 5～10 minutes, check that liquid degree Beaume is not less than 33.5Be ', degree Beaume does not reach while requiring, and adds and throws appropriate crystallization magnesium chloride until liquid degree Beaume reaches requirement;
(2) initial filter, carries out initial filter to the liquid in dissolving tank, removes impurity and precipitation, obtains initial filter liquid magnesium chloride;
(3) secondary filter: by initial filter liquid magnesium chloride natural subsidence after at least 3 days, drop into successively 2 accurate filters and carry out secondary filter, accurate filter pressure 0.07～0.08MPa during secondary filter, and the filtration precision of First accurate filter is 0.4～0.5 μ m, the filtration precision of second accurate filter is 0.15～0.25 μ m; Secondary filter makes liquid magnesium chloride;
(4) evaporation: liquid magnesium chloride is established in preheater and is preheated to 50～100 ℃, then enter and enter two effect separators after 2nd effect evaporator heating and carry out vapor-liquid separation, two effect separators go out liquid temp 70-110 ℃, vapor temperature is controlled at 80～125 ℃, the vacuum degree control of two effect separators is at-0.05～-0.09MPa, liquid after separation enters and enters an effect separator after 1st effective evaporator heating again and carry out vapor-liquid separation again, the liquid temp that goes out of one effect separator is 130～140 ℃, the vapor temperature of one effect separator is controlled at 140～170 ℃, the vacuum degree control of one effect separator is at-0.05～-0.09MPa, vapor-liquid separation by an effect separator obtains liquid magnesium chloride,
(5) liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying liquid magnesium chloride, and the temperature of pipeline is controlled at 130～160 ℃, makes finished product magnesium chloride granules.
2. a kind of magnesium chloride production technique according to claim 1, is characterized in that, in step (1): the input weightmeasurement ratio of crystallization magnesium chloride and water is: 1350:600kg/L.
3. the production technique of a kind of magnesium chloride granules according to claim 1, is characterized in that, in step (3), the filtration precision of First accurate filter is 0.45 μ m, and the filtration precision of second accurate filter is 0.2 μ m.
4. the production technique of a kind of magnesium chloride granules according to claim 1, is characterized in that, in step (5), the granularity of the finished product magnesium chloride granules making is 50～70 orders.
5. the production technique of a kind of magnesium chloride granules according to claim 4, is characterized in that, in step (5), the granularity of the finished product magnesium chloride granules making is 60 orders.
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| CN201310099090.XA CN103145159B (en) | 2013-03-26 | 2013-03-26 | Production process of magnesium chloride granules |
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| CN201310099090.XA CN103145159B (en) | 2013-03-26 | 2013-03-26 | Production process of magnesium chloride granules |
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| CN103145159B true CN103145159B (en) | 2014-11-26 |
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| US3642455A (en) * | 1968-04-12 | 1972-02-15 | Salzdetfurth Ag | Process for recovering low-sulfate bischofite |
| ES2213151T3 (en) * | 1993-10-28 | 2004-08-16 | Commonwealth Scientific And Industrial Research Organisation | MAGNESIC CHLORIDE ANHYDRO. |
| CN102674412A (en) * | 2012-06-20 | 2012-09-19 | 天津长芦海晶集团有限公司 | Preparation method of magnesium chloride hexahydrate |
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