CN103145159A - Production process of magnesium chloride granules - Google Patents
Production process of magnesium chloride granules Download PDFInfo
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- CN103145159A CN103145159A CN201310099090XA CN201310099090A CN103145159A CN 103145159 A CN103145159 A CN 103145159A CN 201310099090X A CN201310099090X A CN 201310099090XA CN 201310099090 A CN201310099090 A CN 201310099090A CN 103145159 A CN103145159 A CN 103145159A
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- Prior art keywords
- magnesium chloride
- liquid
- filter
- granules
- effect
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- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 title claims abstract description 174
- 229910001629 magnesium chloride Inorganic materials 0.000 title claims abstract description 87
- 239000008187 granular material Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 84
- 238000000926 separation method Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 238000002425 crystallisation Methods 0.000 claims description 18
- 230000008025 crystallization Effects 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000005469 granulation Methods 0.000 claims description 10
- 230000003179 granulation Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 5
- 239000000047 product Substances 0.000 abstract 4
- 239000000706 filtrate Substances 0.000 abstract 3
- 238000009776 industrial production Methods 0.000 abstract 1
- 239000008188 pellet Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
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, the magnesium chloride production technique is produced mostly is the 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, and impurity is arranged after dissolving, need to precipitate and filter.And most the employing entirely manually produced, the packing of weighing by hand, and production efficiency is low.Product has corner angle, easily occurs bale broken in transportation, and the product area is larger, can't 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, drop in dissolving tank through conveying belt, the input weight ratio of crystallization magnesium chloride and water is: 1300 ~ 1400:600 kg/L, stirred 10 ~ 15 minutes, staticly settle 5 ~ 10 minutes, check that the liquid degree Beaume is not less than 33.5 Be ', degree Beaume does not reach when requiring, and adds and throws appropriate crystallization magnesium chloride until the liquid degree Beaume reaches requirement;
(2) initial filter is carried out initial filter to the liquid in dissolving tank, removes impurity and precipitation, gets initial filter liquid magnesium chloride;
(3) secondary filter: with 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, and the filtration precision of second accurate filter is 0.15 ~ 0.25 μ m; Secondary filter makes the liquid magnesium chloride;
(4) evaporation: the liquid magnesium chloride is established be preheated to 50 ~ 100 ℃ in preheater, 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-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-0.05 ~-0.09Mpa, vapor-liquid separation by an effect separator obtains the liquid magnesium chloride,
(5) the liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying the liquid magnesium chloride, and the temperature of pipeline is controlled at 130 ~ 160 ℃, makes the 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 that makes is preferred 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, the inventive method can directly use Qinghai mineral products crystallization to be raw material, and raw material is sufficient, and Quality Safety is reliable;
Three, the product purity of the inventive method production is high, can reach the superior product requirement; Its dissolving can be used while dissolving fast, clear after dissolving, inclusion-free; Adopt automatic production line, reduce external contamination, the product tap density is little, saves transport space, and is difficult for deliquescence, and product is 50-70 order flow particles, can directly use with other Product mixes under solid form.
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 consist of its Copyright law.
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, drop in dissolving tank through conveying belt, the input weight ratio of crystallization magnesium chloride and water is: 1300:600 kg/L, stirred 10 minutes, staticly settle 5 minutes, check that the liquid degree Beaume is not less than 33.5 Be ', degree Beaume does not reach when requiring, and adds and throws appropriate crystallization magnesium chloride until the liquid degree Beaume reaches requirement;
(2) initial filter is carried out initial filter to the liquid in dissolving tank, removes impurity and precipitation, gets initial filter liquid magnesium chloride;
(3) secondary filter: with 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, and the filtration precision of second accurate filter is 0.15 μ m; Secondary filter makes the liquid magnesium chloride;
(4) evaporation: the liquid magnesium chloride is established be preheated to 50 ℃ in preheater, 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 the liquid magnesium chloride,
(5) the liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying the 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, drop in dissolving tank through conveying belt, the input weight ratio of crystallization magnesium chloride and water is: 1400:600 kg/L, stirred 15 minutes, staticly settle 10 minutes, check that the liquid degree Beaume is not less than 33.5Be ', degree Beaume does not reach when requiring, and adds and throws appropriate crystallization magnesium chloride until the liquid degree Beaume reaches requirement;
(2) initial filter is carried out initial filter to the liquid in dissolving tank, removes impurity and precipitation, gets initial filter liquid magnesium chloride;
(3) secondary filter: with 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, and the filtration precision of second accurate filter is 0.25 μ m; Secondary filter makes the liquid magnesium chloride;
(4) evaporation: the liquid magnesium chloride is established be preheated to 100 ℃ in preheater, 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 the liquid magnesium chloride,
(5) the liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying the 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, drop in dissolving tank through conveying belt, the input weight ratio of crystallization magnesium chloride and water is: 1350:600 kg/L, stirred 12 minutes, staticly settle 8 minutes, check that the liquid degree Beaume is not less than 33.5 Be ', degree Beaume does not reach when requiring, and adds and throws appropriate crystallization magnesium chloride until the liquid degree Beaume reaches requirement;
(2) initial filter is carried out initial filter to the liquid in dissolving tank, removes impurity and precipitation, gets initial filter liquid magnesium chloride;
(3) secondary filter: with 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, and the filtration precision of second accurate filter is 0.20 μ m; Secondary filter makes the liquid magnesium chloride;
(4) evaporation: the liquid magnesium chloride is established be preheated to 75 ℃ in preheater, 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 the liquid magnesium chloride,
(5) the liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying the 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. the production technique of a 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, drop in dissolving tank through conveying belt, the input weight ratio of crystallization magnesium chloride and water is: 1300 ~ 1400:600kg/L, stirred 10 ~ 15 minutes, staticly settle 5 ~ 10 minutes, check that the liquid degree Beaume is not less than 33.5Be ', degree Beaume does not reach when requiring, and adds and throws appropriate crystallization magnesium chloride until the liquid degree Beaume reaches requirement;
(2) initial filter is carried out initial filter to the liquid in dissolving tank, removes impurity and precipitation, gets initial filter liquid magnesium chloride;
(3) secondary filter: with 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, and the filtration precision of second accurate filter is 0.15 ~ 0.25 μ m; Secondary filter makes the liquid magnesium chloride;
(4) evaporation: the liquid magnesium chloride is established be preheated to 50 ~ 100 ℃ in preheater, 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-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-0.05 ~-0.09Mpa, vapor-liquid separation by an effect separator obtains the liquid magnesium chloride,
(5) the liquid magnesium chloride is transported to dustless granulation chamber by pipeline and carries out granulation with tablets press, pipeline is when carrying the liquid magnesium chloride, and the temperature of pipeline is controlled at 130 ~ 160 ℃, makes the 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 weight ratio of crystallization magnesium chloride and water is: 1350:600 kg/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 that makes 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 that makes is 60 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310099090.XA CN103145159B (en) | 2013-03-26 | 2013-03-26 | Production process of magnesium chloride granules |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310099090.XA CN103145159B (en) | 2013-03-26 | 2013-03-26 | Production process of magnesium chloride granules |
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| CN103145159A true CN103145159A (en) | 2013-06-12 |
| CN103145159B CN103145159B (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310099090.XA Active CN103145159B (en) | 2013-03-26 | 2013-03-26 | Production process of magnesium chloride granules |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030327A (en) * | 2014-02-27 | 2014-09-10 | 青海西部镁业有限公司 | Method of continuous dissolution of salt lake bischofite to prepare high-concentration magnesium chloride solution |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD86385A (en) * | ||||
| US3642455A (en) * | 1968-04-12 | 1972-02-15 | Salzdetfurth Ag | Process for recovering low-sulfate bischofite |
| CN1135743A (en) * | 1993-10-28 | 1996-11-13 | 联邦科学及工业研究组织 | Anhydrous magnesium chloride |
| 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 |
-
2013
- 2013-03-26 CN CN201310099090.XA patent/CN103145159B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD86385A (en) * | ||||
| US3642455A (en) * | 1968-04-12 | 1972-02-15 | Salzdetfurth Ag | Process for recovering low-sulfate bischofite |
| CN1135743A (en) * | 1993-10-28 | 1996-11-13 | 联邦科学及工业研究组织 | Anhydrous magnesium chloride |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 周宁波等: "铵光卤石复盐的制备及结晶动力学研究", 《无机盐工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030327A (en) * | 2014-02-27 | 2014-09-10 | 青海西部镁业有限公司 | Method of continuous dissolution of salt lake bischofite to prepare high-concentration magnesium chloride solution |
| CN104030327B (en) * | 2014-02-27 | 2016-01-13 | 青海西部镁业有限公司 | A kind of Bischofite in Salt lake continuous-dissolution produces the method for high density magnesium chloride solution |
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| Publication number | Publication date |
|---|---|
| CN103145159B (en) | 2014-11-26 |
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Denomination of invention: A production process for magnesium chloride particles Granted publication date: 20141126 Pledgee: Industrial and Commercial Bank of China Limited Lianyungang Lianyun Branch Pledgor: LIANYUNGANG RIFENG CALCIUM & MAGNESIUM Co.,Ltd. Registration number: Y2024980026135 |