CN103567355A - Organic ester sodium silicate self-hardening sand and preparation method thereof - Google Patents
Organic ester sodium silicate self-hardening sand and preparation method thereof Download PDFInfo
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- CN103567355A CN103567355A CN201310472503.4A CN201310472503A CN103567355A CN 103567355 A CN103567355 A CN 103567355A CN 201310472503 A CN201310472503 A CN 201310472503A CN 103567355 A CN103567355 A CN 103567355A
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Abstract
The invention discloses organic ester sodium silicate self-hardening sand and a preparation method thereof. The organic ester sodium silicate self-hardening sand is prepared from the following raw materials in parts by weight: 65-85 parts of forsterite sand, 20-30 parts of iron ore sand, 3-5 parts of modified sodium silicate, 0.2-0.3 parts of diglycol acetate, 0.1-0.2 parts of fungacetin, 5-10 parts of slag, 4-8 parts of dicalcium silicate, 3-6 parts of medical stone, 2-4 parts of sawdust, 1.5-2.5 parts of polyethylene glycol, 2-3 parts of dioctyl maleate and 0.5-1.5 parts of sodium laurylsulfate. Compared with traditional CO2 blowing hardened sodium silicate sand, the organic ester sodium silicate self-hardening sand has the advantages that the amount of sodium silicate is reduced, and the water wave scattering property and used sand recycling property are greatly improved. Moreover, the liquidity of the molding sand is improved, the molding sand is easily compacted, the strength of the hardened sand is high, the refractoriness of the molding sand is improved, and the surface quality of a casting is obviously improved.
Description
Technical field
The present invention relates to a kind of organic ester water-glass self-hardening sand and preparation method thereof, belong to molding sand technical field.
Background technology
Water-glass sand has the advantages such as cost is low, foundry goods is difficult for cracking, environmental pollution is light, has become in recent decades one of molding sand kind with fastest developing speed.But, the common CO that blows
2gas hardened sodium silicate sand technique, because sclerosis is incomplete, intensity is low, need to add more waterglass, and this causes again whole intensity too high, and collapsibility is poor, to breaking, regenerating, brings difficulty, and old sand can not reuse.Meanwhile, waterglass addition is too high, easily scab, and surface quality of continuous castings is difficult to reach user's requirement.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, improve a kind of organic ester water-glass self-hardening sand and preparation method thereof, reducing under the prerequisite of waterglass consumption and proof strength performance, significantly improving the collapsibility of water-glass sand, solving the difficulty of knockout regeneration.
The technical solution used in the present invention is as follows:
, by the raw material of following weight portion, made: forsterite sand 65-85, iron ore 20-30, modified water glass 3-5, diethylene glycol (DEG) acetate 0.2-0.3, triacetin 0.1-0.2, slag 5-10, dicalcium silicate 4-8, medical stone 3-6, wood chip 2-4, polyethylene glycol 1.5-2.5, di-2-ethylhexyl maleate 2-3, sldium lauryl sulfate 0.5-1.5;
The preparation method of described modified water glass is as follows:
(1) take the raw material of following weight portion: waterglass 25-35, water soluble starch 4-8, dextrin 3-6, urea 3-4, sodium sulfite 2-3, Sodium Polyacrylate 4-6, potassium dihydrogen phosphate 2-4, xylitol 1-2, polyisobutene 2-3, calcium lignosulfonate 3-5, rosin acid polyoxyethylene ester 1.5-2.5, sodium carboxymethylcellulose 1-2, vermiculite 4-6, sepiolite 3-5, nano aluminium oxide 2-3, jade powder 1.5-2.5, plant ash 2-3, calcium chloride 1-2, sodium chloride 0.5-1, Di(dioctylpyrophosphato) ethylene titanate 0.5-1,
(2) by vermiculite, sepiolite mixes, pulverized 100-150 mesh sieve, then in the powder after sieving, add calcium chloride and sodium chloride, stir, 880-940 ℃ of calcining 2-3h, shrend, then be placed in the hydrochloric acid solution that concentration is 10-15%, be heated to boiling speed lapping 15-20min, the sodium hydroxide solution regulator solution PH that is 15-20% by concentration is again to neutral, stir 10-15min, filter, with distilled water, clean filter residue, filter residue after cleaning adds water making beating and makes the slurry that solid content is 50-60%, add again polyisobutene, calcium lignosulfonate, rosin acid polyoxyethylene ester and sodium carboxymethylcellulose, under 60-80 ℃ of bath temperature below speed lapping slurry particle diameter to 15 μ m, be spray dried to powder, with nano aluminium oxide, jade powder, plant ash and Di(dioctylpyrophosphato) ethylene titanate, high-speed mixing 5-10min, dry, pulverize porphyrize, cross 300-400 mesh sieve, stand-by,
(3) powder step (2) being made mixes with waterglass, water soluble starch, dextrin, urea, sodium sulfite, Sodium Polyacrylate, potassium dihydrogen phosphate and xylitol, stirs 1-2h, obtains modified water glass.
A preparation method for organic ester water-glass self-hardening sand, comprises the following steps:
(1), by forsterite sand, iron ore, slag and medical stone co-grinding, excessively after 200-300 mesh sieve, be dry mixed 2-3min with dicalcium silicate, wood chip;
(2) add polyethylene glycol, di-2-ethylhexyl maleate, sldium lauryl sulfate, mix 1-2min, then add modified water glass, diethylene glycol (DEG) acetate and triacetin, mix 2-3min, shake out.
Beneficial effect of the present invention:
Organic ester water-glass self-hardening sand of the present invention is compared with traditional CO2 hardened sodium silicate sand that blows, reduced the consumption of waterglass, ripples collapsibility and reclamation of return sand have greatly been improved, and improved the mobility of molding sand, the easy consolidation of molding sand, after sclerosis, sand mold intensity is high, also improved the refractoriness of molding sand, obviously improved the surface quality of foundry goods, make the mechanization of sand processing and molding operation process become possibility simultaneously, raise labour productivity, reduce labor intensity, for applying of water-glass sand technique opened up wide prospect.
The specific embodiment
, by the raw material of following weight (kg), made: forsterite sand 75, iron ore 25, modified water glass 4, diethylene glycol (DEG) acetate 0.2, triacetin 0.1, slag 8, dicalcium silicate 6, medical stone 4, wood chip 3, polyethylene glycol 2, di-2-ethylhexyl maleate 2, sldium lauryl sulfate 1;
The preparation method of described modified water glass is as follows:
(1) take the raw material of following weight (kg): waterglass 25, water soluble starch 4, dextrin 3, urea 3, sodium sulfite 2, Sodium Polyacrylate 4, potassium dihydrogen phosphate 2, xylitol 1, polyisobutene 2, calcium lignosulfonate 3, rosin acid polyoxyethylene ester 1.5, sodium carboxymethylcellulose 1, vermiculite 4, sepiolite 3, nano aluminium oxide 2, jade powder 1.5, plant ash 2, calcium chloride 1, sodium chloride 0.5, Di(dioctylpyrophosphato) ethylene titanate 0.5;
(2) by vermiculite, sepiolite mixes, pulverized 150 mesh sieves, then in the powder after sieving, add calcium chloride and sodium chloride, stir, 905 ℃ of calcining 2h, shrend, then be placed in concentration and be 12% hydrochloric acid solution, be heated to boiling speed lapping 18min, the sodium hydroxide solution regulator solution PH that is 15% by concentration is again to neutral, stir 12min, filter, with distilled water, clean filter residue, filter residue after cleaning adds water making beating, and to make solid content be 55% slurry, add again polyisobutene, calcium lignosulfonate, rosin acid polyoxyethylene ester and sodium carboxymethylcellulose, under 70 ℃ of bath temperatures below speed lapping slurry particle diameter to 15 μ m, be spray dried to powder, with nano aluminium oxide, jade powder, plant ash and Di(dioctylpyrophosphato) ethylene titanate, high-speed mixing 8min, dry, pulverize porphyrize, cross 300 mesh sieves, stand-by,
(3) powder step (2) being made mixes with waterglass, water soluble starch, dextrin, urea, sodium sulfite, Sodium Polyacrylate, potassium dihydrogen phosphate and xylitol, stirs 1.5h, obtains modified water glass.
A preparation method for organic ester water-glass self-hardening sand, comprises the following steps:
(1), by forsterite sand, iron ore, slag and medical stone co-grinding, excessively after 300 mesh sieves, be dry mixed 2min with dicalcium silicate, wood chip;
(2) add polyethylene glycol, di-2-ethylhexyl maleate, sldium lauryl sulfate, mix 2min, then add modified water glass, diethylene glycol (DEG) acetate and triacetin, mix 3min, shake out.
The performance test of the present embodiment molding sand is as follows:
Green compression strength (kPa): 51
24h tensile strength (MPa): 0.45
Gas permeability: 127
Compact rate of molding (%): 44
Shatter index (%): 86.
Claims (2)
1. an organic ester water-glass self-hardening sand, it is characterized in that, by the raw material of following weight portion, made: forsterite sand 65-85, iron ore 20-30, modified water glass 3-5, diethylene glycol (DEG) acetate 0.2-0.3, triacetin 0.1-0.2, slag 5-10, dicalcium silicate 4-8, medical stone 3-6, wood chip 2-4, polyethylene glycol 1.5-2.5, di-2-ethylhexyl maleate 2-3, sldium lauryl sulfate 0.5-1.5;
The preparation method of described modified water glass is as follows:
Take the raw material of following weight portion: waterglass 25-35, water soluble starch 4-8, dextrin 3-6, urea 3-4, sodium sulfite 2-3, Sodium Polyacrylate 4-6, potassium dihydrogen phosphate 2-4, xylitol 1-2, polyisobutene 2-3, calcium lignosulfonate 3-5, rosin acid polyoxyethylene ester 1.5-2.5, sodium carboxymethylcellulose 1-2, vermiculite 4-6, sepiolite 3-5, nano aluminium oxide 2-3, jade powder 1.5-2.5, plant ash 2-3, calcium chloride 1-2, sodium chloride 0.5-1, Di(dioctylpyrophosphato) ethylene titanate 0.5-1,
By vermiculite, sepiolite mixes, pulverized 100-150 mesh sieve, then in the powder after sieving, add calcium chloride and sodium chloride, stir, 880-940 ℃ of calcining 2-3h, shrend, then be placed in the hydrochloric acid solution that concentration is 10-15%, be heated to boiling speed lapping 15-20min, the sodium hydroxide solution regulator solution PH that is 15-20% by concentration is again to neutral, stir 10-15min, filter, with distilled water, clean filter residue, filter residue after cleaning adds water making beating and makes the slurry that solid content is 50-60%, add again polyisobutene, calcium lignosulfonate, rosin acid polyoxyethylene ester and sodium carboxymethylcellulose, under 60-80 ℃ of bath temperature below speed lapping slurry particle diameter to 15 μ m, be spray dried to powder, with nano aluminium oxide, jade powder, plant ash and Di(dioctylpyrophosphato) ethylene titanate, high-speed mixing 5-10min, dry, pulverize porphyrize, cross 300-400 mesh sieve, stand-by,
The powder that step (2) is made mixes with waterglass, water soluble starch, dextrin, urea, sodium sulfite, Sodium Polyacrylate, potassium dihydrogen phosphate and xylitol, stirs 1-2h, obtains modified water glass.
2. the preparation method of organic ester water-glass self-hardening sand according to claim 1, is characterized in that comprising the following steps:
(1), by forsterite sand, iron ore, slag and medical stone co-grinding, excessively after 200-300 mesh sieve, be dry mixed 2-3min with dicalcium silicate, wood chip;
(2) add polyethylene glycol, di-2-ethylhexyl maleate, sldium lauryl sulfate, mix 1-2min, then add modified water glass, diethylene glycol (DEG) acetate and triacetin, mix 2-3min, shake out.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104259381A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨理工大学 | Preparation method for modified water glass for casting |
| CN104312376A (en) * | 2014-09-15 | 2015-01-28 | 天长市巨龙车船涂料有限公司 | High temperature-resistant flame-retardant modified bituminous paint for ships and preparation method thereof |
| CN104312375A (en) * | 2014-09-15 | 2015-01-28 | 天长市巨龙车船涂料有限公司 | Wear-resistant scratch-resistant anti-ultraviolet paint for ships and preparation method thereof |
| CN104312374A (en) * | 2014-09-15 | 2015-01-28 | 天长市巨龙车船涂料有限公司 | Modified asphalt priming paint for ships and preparation method thereof |
| CN105414459A (en) * | 2015-11-23 | 2016-03-23 | 合肥李诺新材料贸易有限公司 | High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof |
| CN105414458A (en) * | 2015-11-23 | 2016-03-23 | 合肥李诺新材料贸易有限公司 | High-compressive-strength composite modified sodium silicate sand for pump valve castings, and preparation method thereof |
| CN106077432A (en) * | 2016-08-18 | 2016-11-09 | 江阴联华铸造有限公司 | A kind of automobile gearbox casting water glass core sand and preparation method thereof |
| CN106466704A (en) * | 2016-09-21 | 2017-03-01 | 沈阳铸造研究所 | A kind of Organic Ester Hardening Water Glass Sand being applied to forsterite sand and preparation method |
| CN110496934A (en) * | 2019-09-07 | 2019-11-26 | 广西长城机械股份有限公司 | A kind of waterglass rouge hardening molding sand for being suitable for casting alkaline high manganese steel casting materials'use |
| CN110496933A (en) * | 2019-09-07 | 2019-11-26 | 广西长城机械股份有限公司 | A kind of waterglass carbon dioxide hardening molding sand for being suitable for casting alkaline high manganese steel casting materials'use |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104312376A (en) * | 2014-09-15 | 2015-01-28 | 天长市巨龙车船涂料有限公司 | High temperature-resistant flame-retardant modified bituminous paint for ships and preparation method thereof |
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| CN104312374A (en) * | 2014-09-15 | 2015-01-28 | 天长市巨龙车船涂料有限公司 | Modified asphalt priming paint for ships and preparation method thereof |
| CN104259381A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨理工大学 | Preparation method for modified water glass for casting |
| CN105414459A (en) * | 2015-11-23 | 2016-03-23 | 合肥李诺新材料贸易有限公司 | High-thermal-conductivity composite modified sodium silicate sand for pump valve castings, and preparation method thereof |
| CN105414458A (en) * | 2015-11-23 | 2016-03-23 | 合肥李诺新材料贸易有限公司 | High-compressive-strength composite modified sodium silicate sand for pump valve castings, and preparation method thereof |
| CN106077432A (en) * | 2016-08-18 | 2016-11-09 | 江阴联华铸造有限公司 | A kind of automobile gearbox casting water glass core sand and preparation method thereof |
| CN106466704A (en) * | 2016-09-21 | 2017-03-01 | 沈阳铸造研究所 | A kind of Organic Ester Hardening Water Glass Sand being applied to forsterite sand and preparation method |
| CN110496934A (en) * | 2019-09-07 | 2019-11-26 | 广西长城机械股份有限公司 | A kind of waterglass rouge hardening molding sand for being suitable for casting alkaline high manganese steel casting materials'use |
| CN110496933A (en) * | 2019-09-07 | 2019-11-26 | 广西长城机械股份有限公司 | A kind of waterglass carbon dioxide hardening molding sand for being suitable for casting alkaline high manganese steel casting materials'use |
| CN110496933B (en) * | 2019-09-07 | 2021-02-09 | 广西长城机械股份有限公司 | Sodium silicate carbon dioxide hardened molding sand suitable for casting alkaline high manganese steel casting material |
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