CN103586601B - The preparation method of alginate for a kind of welding material - Google Patents
The preparation method of alginate for a kind of welding material Download PDFInfo
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- CN103586601B CN103586601B CN201310609779.2A CN201310609779A CN103586601B CN 103586601 B CN103586601 B CN 103586601B CN 201310609779 A CN201310609779 A CN 201310609779A CN 103586601 B CN103586601 B CN 103586601B
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- alginate
- calcium
- alginic acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/404—Coated rods; Coated electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention provides the preparation method of a kind of welding material alginate, the present invention is taking brown alga as raw material, processing step comprises immersion, cleans, add soda ash digestion and obtain glue, glue is diluted with water to filter and obtains clear glue solution, clear glue solution and calcium chloride solution are converted into calcium alginate gel, calcium alginate and hydrochloric acid solution are converted into the alginic acid of calcium content 0.5-1.0%, water washing alginic acid to its chloride ion content is less than 0.1%, dewater and pulverize after alginic acid solid state under add alkali neutralization, dry, pulverize and obtain 150-200 order alginate. The present invention affects by controlling alginate intensity, viscosity, calcium content, chloride, granularity, moisture etc. the index that it acts in electrode coating, the alginates that make preparation, for the have clear improvement effect of electrode coating composition wet strength, plasticity of electrode coating hygrometric state coagulating agent tool, have improved welding rod yield rate.
Description
Technical field
The invention belongs to the technical field of marine alga processing, be specifically related to the preparation side of a kind of welding material alginateMethod.
Background technology
The making of electrode coating is to be generally dry mixed by the selected medicinal powder of formula, then in dry powder, adds gradually water glassGlass, and constantly stir, reach partly to medicinal powder and wet, have certain fluidity and can pinch agglomerating state. Conventional cohering in welding rodAgent waterglass humidity cohesion and wettability are bad, add after alginate, can make wet strength be improved, and increase simultaneouslyStrong plasticity and the slickness of crust, can ensure in welding rod extrusion modling that crust can not be out of shape and break, and ensures crust and core wireHave maximum concentricity, alginate ashing immediately in the time of welding simultaneously, makes the minimizing of splashing of electric welding process, plays stable electricalThe effect of arc.
Alginate quality directly affects the processing performance of electrode coating, and moisture effects is to alginate storage process viscosityStability, particle size influences medicinal powder mixes and the slickness of coating, viscosity and intensity comprehensive function affect medicinal powder mobility, cohereProperty and plasticity, in alginate, chloride ion content is greater than 0.1%, can make pad easily be corroded, and existing production technology is carriedThe alginate of getting is for electrode coating, and cohesiveness and plasticity are undesirable.
It is generally acknowledged that sodium alginate or potassium alginate mainly play close-burning effect, calcium alginate mainly plays enhancing coating and mouldsThe effect of property, intensity, the composite use humidification of common two class. Dispel the chloride in alginate, extraction process adopts to be hadMachine solution is made the mode of medium neutralization, and this is also relatively in solid phase method and increased cost.
Have much by the data of alginate about welding material, have about sodium alginate technology of preparing, also have and carry outFormula requires, as patent CN102554510A stainless steel electrode is selected the organic matter constituents of calcium alginate as welding rod; SpeciallyProfit CN101927409A titanium-calcium stainless steel A 022 electric welding rod selects potassium alginate, calcium alginate to improve coating intensity; PatentCN1481969A Welding electrode for high manganese carbon steel rail selects sodium alginate to make plasticizer, and above patent is only selected sea from formulaAlginates improve the performance of coating, but welding material is carried out total quality requirement and forms specific technology of preparing with alginateHave not been reported.
Summary of the invention
The invention provides the preparation method of a kind of welding material alginate, the present invention is by controlling alginatePreparation process, controls its intensity, viscosity, chlorine residual, calcium content, moisture, granularity within the specific limits, to reach at electrode coatingIn better effect.
For achieving the above object, the present invention is achieved by the following technical solutions:
A preparation method for alginate for welding material, comprises the steps:
(1) choose the brown alga that in alginic acid, mannuronic acid-content is 40-65%, be soaked in water, clean, alkali digestion, disappearsChange 55-65 DEG C of reaction control temperature, time 10-14h, obtain digestion glue;
(2) described digestion glue is diluted with water, and isolated by filtration obtains clear glue solution;
(3) clear glue solution reacts and is converted into calcium alginate gel with calcium chloride solution, the salt of service property (quality) mark 0.1-0.6%Calcium alginate gel is converted into the alginic acid that calcium mass ratio is 0.5-1.0% by acid solution;
(4) alginic acid is washed with water to its chloride ion content and is less than 0.1%, dewaters to moisture 60-70%, pulverizes;
(5) under the alginic acid solid conditions of pulverizing, be neutralized to pH6-8 with alkali;
(6) being dried to moisture is 8-13%, pulverizes, and obtains alginate finished product.
Further improvement to technique scheme: the alginate product viscosity obtaining is 300-700mpa.s, gelIntensity is less than 300g/cm2, calcium content 0.5-1.0%, chloride content is less than 0.1%, moisture 8-13%.
Further improvement to technique scheme: described alginate is sodium alginate, potassium alginate or calcium alginate.
Further improvement to technique scheme: in described step (5), neutralization can be sodium carbonate or potash with alkali.
Further improvement to technique scheme: described step is crushed to 150-200 order in (6).
Compared with prior art, advantage of the present invention and good effect are: the present invention utilizes alginic acid leaching process, marine algaIn acid, calcium content is high is conducive to reduce hydrochloric acid and uses and improve washing, dehydrating effect and come, to improve alginic acid purity, to reach liquid phaseThe effect of residues of chloride in alginate is dispelled in method neutralization; The present invention uses solid phase method to prepare welding rod alginate, and it is rawProduce cost, operating procedure is simple; Alginate medium viscosity is 300-700mpa.s simultaneously, and gel strength is less than 300g/cm2, calcium content 0.5-1.0%, chloride content is less than 0.1%, moisture 8-13%, the described alginate making possesses good simultaneouslyGood cohesiveness and plasticity effect, improve the application performance of alginate in welding rod.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further detailed explanation.
Embodiment 1
Alginic acid is made up of with position isomer two kinds of mannuronic acid and guluronic acids, uses different mannuronic acids to containThe sodium alginate of amount uses contrast test in welding material:
Select different brown algas (mannuronic acid and guluronic acid content value in the alginic acid of its extraction of brown alga for businessAll known, mannuronic acid-content of the present invention refers to that mannuronic acid accounts for the ratio of mannuronic acid and guluronic acid total amountExample) extract respectively the sodium alginate of mannuronic acid-content 32%, 48%, 59%, 70% welding rod specification. Welding rod coating recipe isCaCO360g，CaF260g，TiO2330g，SiO230g, potassic feldspar 150g, electrolyte Mn50g, Cr150g, Ni150g,Fe-Mo50g, cellulose 10g, sodium alginate 5g, mixes with 180ml potassium silicate after above medicinal powder is mixed.
Result of the test shows: the alginates of mannuronic acid-content 32% do not have the effect that strengthens electrode coating plasticity, itsHis effect of 3 kinds of alginates increase coating plasticity is better; In reality, mannuronic acid-content is higher than its extraction of alginates of 70%More difficult, brown alga raw material is also more rare, we mainly select the alginate of mannuronic acid-content 40 ~ 65%, and select and can carryGet the brown alga of this alginate.
Embodiment 2
Described in the present embodiment, welding material comprises the following steps by the preparation method of alginate:
1, (in the alginic acid of extraction, mannuronic acid accounts for the ratio of mannuronic acid and guluronic acid total amount to select bulk kelpExample, mannuronic acid-content is 45%), soak, clean, add alkali at 62 DEG C, react and must digest glue in 12 hours;
2, digestion glue is diluted with water, and isolated by filtration obtains clear glue solution.
3, clear glue solution and calcium chloride solution transform and obtain calcium alginate gel, and calcium alginate gel is in stirring and matterThe hydrochloric acid solution reaction that amount mark is 0.4% obtains the alginic acid of calcium content 0.7%. Control concentration of hydrochloric acid, reach control alginic acidThe object of middle chlorinity, calcium content.
4, alginic acid is washed with water to its chloride ion content and is less than 0.1%, dewaters to moisture 57%, pulverizes.
5, alginic acid reacts to pH6-8 in reactor with powdered sodium carbonate.
6, dry, pulverize to 150 orders and obtain sodium alginate product.
Detect the sodium alginate product (alginates 1% solution viscosity, 1% solution strength, calcium content, the chloride that finally obtainContent, moisture content index): viscosity 350mpa.s, intensity 250g/cm2, calcium content 0.8% chloride content < 0.1%, moisture 11%.
Embodiment 3
Described in the present embodiment, welding material comprises the following steps by the preparation method of alginate:
1, select sea-tangle (in the alginic acid of extraction, mannuronic acid-content accounts for 55%), soak, clean, add 55 DEG C, alkali,React 11 hours;
2, digestion glue is diluted with water, and isolated by filtration obtains clear glue solution.
3, clear glue solution and calcium chloride solution transform and obtain calcium alginate gel, and calcium alginate gel is in stirring and concentrationBe 0.5% hydrochloric acid, reaction obtains alginic acid.
4, alginic acid is washed with water to its chloride ion content and is less than 0.1%, dewaters to moisture 60%, pulverizes.
5, solid-state alginic acid reacts to pH6-8 in reactor with potassium carbonate powder.
6, dry, pulverize to 170 orders, obtain alginate product.
Detect the potassium alginate product (alginates 1% solution viscosity, 1% solution strength, calcium content, the chloride that finally obtainContent, moisture content index): 300mPas, intensity 200g/cm2, calcium content 0.6%, chloride content < 0.1%, moisture 11%.
Above embodiment is only in order to technical scheme of the present invention to be described, but not is limited; Although with reference to aforementioned realityExecute example the present invention is had been described in detail, for the person of ordinary skill of the art, still can be to aforementioned enforcementThe technical scheme recorded of example is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replaceChange, do not make the essence of appropriate technical solution depart from the spirit and scope of the present invention's technical scheme required for protection.
Claims (3)
1. a preparation method for alginate for welding material, is characterized in that comprising the steps:
(1) choose the brown alga that in alginic acid, mannuronic acid mass content is 40-65%, be soaked in water, clean, alkali digestion, disappearsChange 55-65 DEG C of reaction control temperature, time 10-14h, obtain digestion glue;
(2) described digestion glue is diluted with water, and isolated by filtration obtains clear glue solution;
(3) clear glue solution reacts and is converted into calcium alginate gel with calcium chloride solution, and the salt of service property (quality) mark 0.1-0.6% is acid-solubleCalcium alginate gel is converted into the alginic acid that calcium mass ratio is 0.5-1.0% by liquid;
(4) alginic acid is washed with water to its chloride ion content and is less than 0.1%, dewaters to moisture 60-70%, pulverizes;
(5) under the alginic acid solid conditions of pulverizing, be neutralized to pH6-8 with alkali; Described alkali is powdered sodium carbonate or potash powderEnd;
(6) being dried to moisture is 8-13%, pulverizes, and obtains alginate finished product, and viscosity is 300-700mpa.s, gelIntensity is less than 300g/cm2, calcium content 0.5-1.0%, chloride content is less than 0.1%, moisture 8-13%.
2. the preparation method of alginate for a kind of welding material according to claim 1, is characterized in that described marine algaHydrochlorate is sodium alginate or potassium alginate.
3. the preparation method of alginate for a kind of welding material according to claim 1, is characterized in that described step(6) in, be crushed to 150-200 order.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310609779.2A CN103586601B (en) | 2013-11-27 | 2013-11-27 | The preparation method of alginate for a kind of welding material |
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| CN201310609779.2A CN103586601B (en) | 2013-11-27 | 2013-11-27 | The preparation method of alginate for a kind of welding material |
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| CN103586601B true CN103586601B (en) | 2016-05-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105111329B (en) * | 2015-09-15 | 2017-11-03 | 邳州高新区生物医药研究院有限公司 | A kind of method for preparing calcium alginate |
| CN108191993B (en) * | 2017-12-26 | 2019-07-26 | 青岛明月海藻集团有限公司 | A kind of sodium alginate and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101889027B (en) * | 2007-12-29 | 2013-05-01 | 于传兴 | Alginic acid with low molecular weight, its salts, uses, preparative methods, pharmaceutical compositions and foods |
| CN101585890B (en) * | 2008-06-20 | 2011-08-24 | 青岛聚大洋海藻工业有限公司 | Method for preparing sodium alginate from kelp |
| CN101423564B (en) * | 2008-12-08 | 2011-05-04 | 青岛明月海藻集团有限公司 | Method for preparing alginate for fast preparation of hydrogel |
| CN102977224B (en) * | 2012-12-21 | 2014-08-13 | 青岛明月海藻集团有限公司 | Method for preparing calcium alginate |
| CN103360510B (en) * | 2013-07-31 | 2015-06-17 | 青岛海之林生物科技开发有限公司 | Production method for alginate specialized for welding |
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