CN105621379A - Improved three-stage neutralization crystallization method in feed-grade calcium hydrogen phosphate production technique - Google Patents
Improved three-stage neutralization crystallization method in feed-grade calcium hydrogen phosphate production technique Download PDFInfo
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- CN105621379A CN105621379A CN201610227046.6A CN201610227046A CN105621379A CN 105621379 A CN105621379 A CN 105621379A CN 201610227046 A CN201610227046 A CN 201610227046A CN 105621379 A CN105621379 A CN 105621379A
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- lime
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
- C01B25/322—Preparation by neutralisation of orthophosphoric acid
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- Fodder In General (AREA)
Abstract
The invention discloses an improved three-stage neutralization crystallization method in a feed-grade calcium hydrogen phosphate production technique. The method comprises the following steps: (1) delivering fired slaked lime into a cylindrical lime slaking machine, adding hot water with the temperature of 60-90 DEG C, and stirring to obtain lime milk, wherein the mass ratio of the water to the quicklime is 1.07-1.09; (2) delivering the stirred lime milk into a screening plant, screening to remove solids with the particle size of 2mm or above to obtain crude lime milk, and storing the crude lime milk in an underground tank; (3) delivering the crude lime milk into a cyclone, and continuously carrying out sand separation twice to obtain refined lime milk; and (4) applying the refined lime milk into the three-stage neutralization. The method has the advantage of low equipment input cost; and the prepared product can well satisfy the product packaging capacity requirement, thereby reducing the transportation frequency and saving the transportation cost.
Description
Technical field
The present invention relates to food processing technology field, what be specifically related to is the modification method of three sections of neutralization crystal reactions in a kind of calcium hydrophosphate fodder production technique.
Background technology
At present, in the production technique of calcium hydrophosphate fodder, one, the neutralization reaction of two sections is all phosphoric acid purification, and three sections of neutralization reactions are then produce work in-process. The work in-process produced, its quality is except GB/T--22549 set quota, and visual appearance is also extremely important, it is thus desirable to product crystallization is thick, good fluidity.
The factor generalized case affecting product crystallization has following aspect:
1. raw and auxiliary material quality;
2. neutralization reaction stirring intensity;
3. during neutralization reaction, the control of milk of lime add-on and time in phosphoric acid;
4. temperature of reaction.
At present, owing to phosphate rock quality entirety becomes falling tendency, thus can only control from other aspects, and this is wherein, for the control of temperature of reaction, the mode that boiler mostly can be adopted at present to add steam intensification carries out controlling (generally between 30��40 DEG C), but so, can significantly increase the cost that equipment runs, should not adopt for a long time; And if three sections of neutralization reactions are placed in and react at normal temperatures, then can cause that product crystallization is tiny, mobility is poor.
And the consequence that product crystallization is tiny and mobility is poor brought is, when later stage packs, bale capacity is less, the packing instructions (industry universal packaging woven bag specification 600*1050mm(50kg) of packing bag can not be met, after packaging uprightly, material packing height is generally at about 700mm, poor meeting is at more than 800mm, flanging package is all more difficult, less than 50kg after even filling), will cause the increase of transportation cost like this (under the demand of product large usage quantity, owing to the packing instructions of 50kg cannot be met, thus need repeatedly to transport back and forth).
Summary of the invention
For above-mentioned the deficiencies in the prior art, the present invention provides the modification method of three sections of neutralization crystal reactions in a kind of calcium hydrophosphate fodder production technique, product can be made to meet packing instructions, and reduce transportation cost.
For achieving the above object, the technical solution used in the present invention is as follows:
The modification method of three sections of neutralization crystal reactions in calcium hydrophosphate fodder production technique, comprises the following steps:
(1) white lime baked is delivered in cylinder lime slaking machine, and adds the hot water stirs that temperature is 60��90 DEG C, obtain ash breast; The mass ratio of water and unslaked lime is 1.07��1.09;
(2) the grey breast after stirring is delivered in screening plant and sieves, remove the solids of more than granularity 2mm, obtain thick ash breast, be then stored in sloptank;
(3) it is delivered in swirler to carry out twice sub-sand continuously by thick ash breast, obtains essence ash breast;
(4) obtained essence ash breast is applied in three sections of neutralization reactions.
Further, in described step (1), first the unslaked lime baked is carried out fragmentation, obtain the white lime of 15��40mm lumpiness, and then be delivered in cylinder lime slaking machine.
Specifically, described step (3) comprises the following steps:
(3a) thick ash breast is delivered in swirler, and material high-speed is rotated, the lime mud that screening mass is heavier;
(3b) the swirler grey breast after sieving out lime mud entering into another parallel connection carries out regrading, obtains essence ash breast.
Compared with prior art, the present invention has following useful effect:
(1) the present invention adopts white lime to mix preparation ash breast with 60��90 DEG C of hot water, and carry out two sub-sands by swirler, obtain essence ash breast, thus, when essence ash breast is applied in three sections of neutralization reactions, its temperature of reaction reaches 55 DEG C��60 DEG C, and compared with original 30��40 DEG C, under this temperature range, it is found by the applicant that, the product that reaction obtains has good material crystallization and mobility, bale capacity requirement during later stage packaging can be met completely, and facilitate flanging package, therefore transport number of times can be reduced, and saved transportation cost.
(2) the present invention is before being fed through cylinder lime slaking machine by white lime, has also been carried out fragmentation, so can improve lime receipts rate, and shorten the time of ashing, it is to increase working efficiency.
Embodiment
Below in conjunction with embodiment, the invention will be further described, and the mode of the present invention comprises but is not limited only to following examples.
Three sections of neutralization crystal reaction links that the present invention is mainly used in calcium hydrophosphate fodder production technique, it comprises the following steps:
(1) white lime baked is delivered in cylinder lime slaking machine, and adds the hot water stirs that temperature is 60��90 DEG C, obtain ash breast; The mass ratio of water and unslaked lime is that 1.07��1.09(proportion is too low, then water content height during neutralization reaction, and neutralizing well unit volume treatment capacity is few, is also unfavorable for separation; Proportion is too high, has parcel phenomenon, affect product index when neutralization reaction stirs); In this step, white lime is carried out fragmentation by configurable disintegrating apparatus so that it is lumpiness reaches 15��40mm, and then is delivered in cylinder lime slaking machine;
(2) the grey breast after stirring is delivered in screening plant and sieves, remove the solids of more than granularity 2mm, obtain thick ash breast, be then stored in sloptank;
(3) thick ash breast is delivered in swirler, and material high-speed is rotated, the lime mud (can be used for pave the way base or building) that screening mass is heavier;
(4) swirler that the grey breast after sieving out lime mud enters into another parallel connection carries out regrading, obtains essence ash breast;
(5) obtained essence ash breast is delivered in neutralizing well, for three sections of neutralization reactions.
Obtained essence ash breast, by the preparation technology of design essence ash breast, is then used in three sections of neutralization reactions, it is possible to improve crystallization and the mobility of product by the present invention. Without the need to configuring, the equipment such as boiler just can realize temperature of reaction control in the present invention, and the product crystallization obtained is thick, and work in-process easily dewater, and energy is saves energy obviously; Meanwhile, the visual appearance of product is better, more can meet bale capacity requirement, equipment investment and transportation cost cheaper, and therefore, the present invention is suitable for large-scale promotion application.
Above-described embodiment is only the preferred embodiment of the present invention; should not be used for limiting the scope of the invention; the change having no essential meaning made or polishing in all body design thought in the present invention and spirit; its technical problem solved is still consistent with the present invention, all should be included within protection scope of the present invention.
Claims (3)
1. the modification method of three sections of neutralization crystal reactions in calcium hydrophosphate fodder production technique, it is characterised in that, comprise the following steps:
(1) white lime baked is delivered in cylinder lime slaking machine, and adds the hot water stirs that temperature is 60��90 DEG C, obtain ash breast; The mass ratio of water and unslaked lime is 1.07��1.09;
(2) the grey breast after stirring is delivered in screening plant and sieves, remove the solids of more than granularity 2mm, obtain thick ash breast, be then stored in sloptank;
(3) it is delivered in swirler to carry out twice sub-sand continuously by thick ash breast, obtains essence ash breast;
(4) obtained essence ash breast is applied in three sections of neutralization reactions.
2. the modification method of three sections of neutralization crystal reactions in calcium hydrophosphate fodder production technique according to claim 1, it is characterized in that, in described step (1), first the unslaked lime baked is carried out fragmentation, obtain the unslaked lime of 15��40mm lumpiness, and then it is delivered in cylinder lime slaking machine.
3. the modification method of three sections of neutralization crystal reactions in calcium hydrophosphate fodder production technique according to claim 1 and 2, it is characterised in that, described step (3) comprises the following steps:
(3a) thick ash breast is delivered in swirler, and material high-speed is rotated, the lime mud that screening mass is heavier;
(3b) the swirler grey breast after sieving out lime mud entering into another parallel connection carries out regrading, obtains essence ash breast.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610227046.6A CN105621379A (en) | 2016-04-13 | 2016-04-13 | Improved three-stage neutralization crystallization method in feed-grade calcium hydrogen phosphate production technique |
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| CN201610227046.6A CN105621379A (en) | 2016-04-13 | 2016-04-13 | Improved three-stage neutralization crystallization method in feed-grade calcium hydrogen phosphate production technique |
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| CN105621379A true CN105621379A (en) | 2016-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116174130A (en) * | 2023-04-24 | 2023-05-30 | 云南胜威化工有限公司 | Intelligent production ash melting system for feed-grade calcium hydrophosphate |
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| CN1887714A (en) * | 2006-08-01 | 2007-01-03 | 中国铝业股份有限公司 | Lime slaking process for alumina production |
| CN101139107A (en) * | 2007-08-16 | 2008-03-12 | 华东理工大学 | Slag included lime cream slag peeling method and device |
| CN101318685A (en) * | 2008-06-28 | 2008-12-10 | 福建省万旗非金属材料有限公司 | Method for preparing ultra-fine active nano-calcium carbonate with low-ore grade limestone activation of activation tank |
| CN102815681A (en) * | 2012-06-21 | 2012-12-12 | 中化云龙有限公司 | Method for producing feed-grade calcium dihydrogen phosphate from wet-process phosphoric acid |
| CN102849703A (en) * | 2012-09-07 | 2013-01-02 | 四川大学 | Method for preparing fine calcium phosphate by using phosphogypsum desulfurization residue |
| CN103145136A (en) * | 2013-01-08 | 2013-06-12 | 东北大学 | Production method of active calcium silicate |
| CN103539095A (en) * | 2013-11-12 | 2014-01-29 | 包头东宝生物技术股份有限公司 | Process for preparing food grade calcium hydrogen phosphate by ox bones |
| CN103539094A (en) * | 2013-11-12 | 2014-01-29 | 包头东宝生物技术股份有限公司 | Process for preparing toothpaste grade calcium hydrogen phosphate by ox bones |
| CN104477961A (en) * | 2014-12-22 | 2015-04-01 | 南通市飞宇精细化学品有限公司 | Preparation method of high-purity fine calcium carbonate |
-
2016
- 2016-04-13 CN CN201610227046.6A patent/CN105621379A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056474A (en) * | 1991-06-04 | 1991-11-27 | 齐鲁乙烯无机化工厂 | The production method of high reactivity, high-purity hydrogen calcium oxide |
| CN1418817A (en) * | 2002-12-20 | 2003-05-21 | 天津渤海化工有限责任公司天津碱厂 | Method for prodn. of active nano calcium carbonate |
| CN1887714A (en) * | 2006-08-01 | 2007-01-03 | 中国铝业股份有限公司 | Lime slaking process for alumina production |
| CN101139107A (en) * | 2007-08-16 | 2008-03-12 | 华东理工大学 | Slag included lime cream slag peeling method and device |
| CN101318685A (en) * | 2008-06-28 | 2008-12-10 | 福建省万旗非金属材料有限公司 | Method for preparing ultra-fine active nano-calcium carbonate with low-ore grade limestone activation of activation tank |
| CN102815681A (en) * | 2012-06-21 | 2012-12-12 | 中化云龙有限公司 | Method for producing feed-grade calcium dihydrogen phosphate from wet-process phosphoric acid |
| CN102849703A (en) * | 2012-09-07 | 2013-01-02 | 四川大学 | Method for preparing fine calcium phosphate by using phosphogypsum desulfurization residue |
| CN103145136A (en) * | 2013-01-08 | 2013-06-12 | 东北大学 | Production method of active calcium silicate |
| CN103539095A (en) * | 2013-11-12 | 2014-01-29 | 包头东宝生物技术股份有限公司 | Process for preparing food grade calcium hydrogen phosphate by ox bones |
| CN103539094A (en) * | 2013-11-12 | 2014-01-29 | 包头东宝生物技术股份有限公司 | Process for preparing toothpaste grade calcium hydrogen phosphate by ox bones |
| CN104477961A (en) * | 2014-12-22 | 2015-04-01 | 南通市飞宇精细化学品有限公司 | Preparation method of high-purity fine calcium carbonate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116174130A (en) * | 2023-04-24 | 2023-05-30 | 云南胜威化工有限公司 | Intelligent production ash melting system for feed-grade calcium hydrophosphate |
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Inventor after: Yin Wanjin Inventor after: Hao Fuyong Inventor before: Yin Wanjin |
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Application publication date: 20160601 |
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