CN103601811A - Method for causticizing corn starch - Google Patents
Method for causticizing corn starch Download PDFInfo
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- CN103601811A CN103601811A CN201310569503.6A CN201310569503A CN103601811A CN 103601811 A CN103601811 A CN 103601811A CN 201310569503 A CN201310569503 A CN 201310569503A CN 103601811 A CN103601811 A CN 103601811A
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- causticizing
- sodium hydroxide
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Abstract
The invention provides a method for causticizing corn starch, which is characterized in that under the condition that the temperature of corn starch feeding water is 40-50 DEG C, materials are simultaneously fed and stirred, and after material feeding is completed, the obtained mixture is fully and uniformly mixed so as to form a suspension liquid; a sodium hydroxide solution with weight and volume percentages of 20% is added into the suspension liquid, and then a sodium hydroxide solid is added into the obtained substance, wherein the mass ratio of the sodium hydroxide solid to corn starch is 4:100; after the temperature of the obtained mixture rises to 65-75 DEG C, the obtained mixture is causticized for one hour; and after water is added into the causticized mixture for constant volume, a corn starch solution is obtained, and then subjected to heat preservation for later use. The corn starch solution prepared by using the method for causticizing corn starches disclosed by the invention is uniform and stable in properties, easy to store and uneasy to go bad; in case that the corn starch solution is used as an iron mineral inhibitor, no 'clustering' phenomenon occurs in the process of preparation, so that the starch utilization rate is high; and the consumption of a beneficiation reagent is reduced by over 5%, and because the causticizing temperature is lowered, the energy consumption is reduced.
Description
Technical field
The present invention relates to a kind of causticization method of W-Gum.
Background technology
Flotation is a kind of important method that mineral sort, and adds beneficiation reagent to carry out sorting after generally need to mineral are levigate.In the reverse flotation process of rhombohedral iron ore, generally use W-Gum as the inhibitor of iron mineral.
Starch is the important inhibitor of non-polar mineral and hematite reverse flotation.It can play restraining effect is the existence due to hydroxyl, carboxyl isopolarity base on distortion starch molecule.So starch can, by hydrogen bond and associated water molecules, make to be subject to the ore particle of its effect to become wetting ability.In fact the causticization of W-Gum is exactly a modifying process, causticization can cause starch granule to occur to expand largely and hydration, make the oxo bridge fracture between starch molecule basic ring, palliating degradation degree strengthens, the probability of the oxidative degradation of amylopectin macromole generation simultaneously increases, destroyed the hydroxyl in starch molecule associates the dilation of starch granule, the oxidized probability of hydroxyl is increased, be conducive to improve the reactive force between starch molecule, the carboxyl generating is relatively many, so can obviously improve the restraining effect of iron mineral.
At present, the compound method of Mineral Processing Industry W-Gum is that the mixing vessels that first the starch input of needs preparation is added with to suitable quantity of water stirs, and intensification compounding bin to 90 ℃, adds 20% appropriate sodium hydroxide solution to compounding bin.Then causticization one hour under 90 ℃ of conditions, adds water constant volume, standby.From preparation, be dosed to causticization process all under 90 ℃ of conditions, often occur " bag group " phenomenon, i.e. the starch inside of surperficial gelatinization accompanies raw starch, and " bag group " is difficult to fully broken.In feed liquid after gelatinization finishes, still remain raw starch, and can not utilize like this, not only reduced the utilization ratio of starch, the more important thing is and can produce detrimentally affect to mineral processing index.Therefore,, at Mineral Processing Industry, while using W-Gum as the inhibitor of iron mineral, the causticization effect of W-Gum seems particularly important.
Summary of the invention
The causticization method that the object of this invention is to provide a kind of W-Gum.
Causticization method according to W-Gum of the present invention, is characterized in that, W-Gum blanking water temp is at 40～50 ℃, while feeding in raw material, stir, fed in raw material, stir, form after suspension, then add the sodium hydroxide solution that weight and volume percent are 20%, adding sodium hydrate solid quality and W-Gum mass ratio is 4:100, afterwards, be warming up to 65～75 ℃, causticization one hour, adds water constant volume, obtain corn starch solution, be incubated standby.
According to the causticization method of W-Gum of the present invention, it is characterized in that, in medicament preparation bucket, the water that adds 8～10 times of W-Gum quality, and heat, make water temp at 40～50 ℃, add W-Gum, while feeding in raw material, stir, fed in raw material, stir, form after suspension, adding weight percent concentration is 20% sodium hydroxide solution again, adding sodium hydrate solid quality and W-Gum mass ratio is 4:100, afterwards, be warming up to 65～75 ℃, causticization one hour, add water constant volume, be mixed with weight percent concentration and be 1.5～5% W-Gum liquid, be incubated standby.
The causticization method of W-Gum of the present invention, in the causticization process of W-Gum, because the gelatinization point point of W-Gum is lower, therefore, the temperature of blanking water should be not too high, is generally no more than 50 ℃.Too high blanking water temperature can make after W-Gum blanking, and pre-gelatinization not yet fully enters gelatinization, thereby causes the variation in starch crystals district, and becomes aging starch.Through our a large amount of experimental study, prove, the gelatinization point of W-Gum is 65～75 ℃.Due to the meticulous granularity of W-Gum, can under higher water temperature, form " bag group " phenomenon, i.e. the starch inside of surperficial gelatinization accompanies raw starch, and " bag group " is difficult to fully broken.In feed liquid after causticization finishes, still remain raw starch like this and can not utilize, not only having reduced the utilization ratio of starch, the more important thing is and can produce detrimentally affect to mineral processing index.
Adopt W-Gum causticization method of the present invention, the corn starch solution making, character is uniform and stable, easily preserves, not perishable.Be used as iron mineral inhibitor, there will not be the phenomenon of " bag group " at process for preparation, starch utilization ratio is high.Reduce beneficiation reagent and consume more than 5%, owing to reducing causticization temperature, also reduced energy consumption.
Embodiment
embodiment:
The causticization method of W-Gum: in medicament preparation bucket, the water that adds 8～10 times of W-Gum quality, and heat, make water temp at 40～50 ℃, add W-Gum, while feeding in raw material, stir, fed in raw material, stir, form after suspension, then to add weight percent concentration be 20% sodium hydroxide solution, adding sodium hydrate solid quality and W-Gum mass ratio is 4:100, afterwards, be warming up to 65～75 ℃, causticization one hour, adds water constant volume, be mixed with weight percent concentration and be 1.5～5% W-Gum liquid, be incubated standby.
Former method is dosed to causticization process all under 90 ℃ of conditions from preparation, has reduced the utilization ratio of starch, the more important thing is and can produce detrimentally affect to mineral processing index.W-Gum adopts the testing data that different collocation methods obtain and obtains data to carrying out flotation test with a collection of rhombohedral iron ore raw ore sample.The correlation data of embodiment method and former method is as follows:
For example: the floating tail grade in the floating fine work of utilization ratio reagent consumption amount position of W-Gum concentration W-Gum
Embodiment 1 1.5% 99% 600g/t 68.12% 11.28%
Former method 1 1.5% 98% 650g/t 68.06% 11.55%
Embodiment 2 2.5% 99% 710g/t 67.88% 10.51%
Former method 2 2.5% 98% 755g/t 67.86% 10.78%
Embodiment 3 4% 99% 680g/t 67.28% 10.41%
Former method 3 4% 98% 730g/t 67.26% 10.68%
Embodiment 4 6% 99% 685g/t 67.27% 10.50%
Former method 4 6% 98% 738g/t 67.23% 10.55%
Embodiment 5 7.5% 99% 630g/t 67.68% 10.75%
Former method 5 7.5% 98% 680g/t 67.65% 10.78%
Embodiment 6 9% 99% 685g/t 67.60% 10.48%
Former method 6 9% 98% 738g/t 67.58% 10.55%
Embodiment 7 10% 99% 660g/t 67.52% 10.88%
Former method 7 10% 98% 670g/t 67.48% 10.92%.
Claims (2)
1. a causticization method for W-Gum, is characterized in that, W-Gum blanking water temp is at 40～50 ℃, while feeding in raw material, stir, fed in raw material, stirred, formed after suspension, adding sodium hydrate solid quality and W-Gum mass ratio is 4-5:100, afterwards, be warming up to 65～75 ℃, causticization one hour, add water constant volume, be mixed with weight percent and be 1.5～10% W-Gum liquid.
2. the causticization method of W-Gum according to claim 1, it is characterized in that, in medicament preparation bucket, add the water of 8～10 times of W-Gum quality, and heat, make water temp at 40～50 ℃, add W-Gum, while feeding in raw material, stir, fed in raw material, stir, form after suspension, adding sodium hydrate solid quality and W-Gum mass ratio is 4:100, afterwards, is warming up to 65～75 ℃, causticization one hour, add water constant volume, be mixed with weight and volume percent and be 1.5～5% W-Gum liquid, be incubated standby.
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| CN201310569503.6A CN103601811A (en) | 2013-11-13 | 2013-11-13 | Method for causticizing corn starch |
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| CN201310569503.6A CN103601811A (en) | 2013-11-13 | 2013-11-13 | Method for causticizing corn starch |
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| CN103601811A true CN103601811A (en) | 2014-02-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226488A (en) * | 2014-07-29 | 2014-12-24 | 唐山学院 | Preparation method of micro-fine particle hematite reverse flotation depressing agent |
| CN113477408A (en) * | 2021-07-21 | 2021-10-08 | 东北大学 | Application of curdlan serving as inhibitor in iron ore reverse flotation in mineral processing field and application method |
| CN114891128A (en) * | 2022-03-18 | 2022-08-12 | 上海逢石科技有限公司 | Preparation and use method of modified starch inhibitor for hematite reverse flotation |
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Cited By (4)
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| CN104226488A (en) * | 2014-07-29 | 2014-12-24 | 唐山学院 | Preparation method of micro-fine particle hematite reverse flotation depressing agent |
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| CN113477408A (en) * | 2021-07-21 | 2021-10-08 | 东北大学 | Application of curdlan serving as inhibitor in iron ore reverse flotation in mineral processing field and application method |
| CN114891128A (en) * | 2022-03-18 | 2022-08-12 | 上海逢石科技有限公司 | Preparation and use method of modified starch inhibitor for hematite reverse flotation |
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Application publication date: 20140226 |