CN103567356A - Sodium silicate sand with high wet-compressive strength and preparation method thereof - Google Patents
Sodium silicate sand with high wet-compressive strength and preparation method thereof Download PDFInfo
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Abstract
The invention discloses sodium silicate sand with high wet-compressive strength and a preparation method thereof. The sodium silicate sand with high wet-compressive is prepared from the following raw materials in parts by weight: 55-75 parts of silica sand, 30-40 parts of carborundum, 10-15 parts of limestone, 5-8 parts of bentonite, 3-6 parts of bauxite, 4-7 parts of modified sodium silicate, 2-3 parts of Arabic gum powder, 1-2 parts of dioctyl phthalate, 3-4 parts of lithium slag powder, 2-3 parts of talcum powder, 1.5-2.5 parts of gypsum, 1-2 parts of triisopropanolamine, 0.5-1 part of stearic acid and 3-5 parts of water. The sodium silicate sand disclosed by the invention is high in wet-compressive strength, easy to draw and repair, so that process requirements of drawing and then curing are completely satisfied. Moreover, the sodium silicate sand has good mobility, low gas evolution rate, good gas permeability and good collapsibility, can be used for remarkably improving the quality of a casting piece and lowering the rejection rate of the casting piece.
Description
Technical field
The present invention relates to a kind of high green compression strength water-glass sand and preparation method thereof, belong to molding sand technical field.
Background technology
Produce in the past big-and-middle-sized foundry goods and all adopt clay-beaded sand, made and will deliver to drying oven after type and dry, the production cycle is long, and casting accuracy is poor, and working condition is poor, can not meet the needs of production development far away.Water-glass sand is because mobility is high, and compact rate of molding is high, and sclerosis is fast, and casting accuracy is high, originates wider, cheap, and the features such as environmental protection, have become in recent decades one of molding sand kind with fastest developing speed.Most steel-casting and large-sized iron casting adopt water-glass sand explained hereafter, although water-glass sand advantage is a lot, but exist the shortcoming that green compression strength is low, and brought certain difficulty to molding and the type of repairing, cannot meet the technological requirement of first molding after-hardening.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, improve a kind of high green compression strength water-glass sand and preparation method thereof, to meet the technological requirement of first molding after-hardening.
The technical solution used in the present invention is as follows:
A green compression strength water-glass sand, is made by the raw material of following weight portion: silica sand 55-75, diamond dust 30-40, lime stone 10-15, bentonite 5-8, bauxite 3-6, modified water glass 4-7, gum arabic powder 2-3, dioctyl phthalate 1-2, lithium ground-slag 3-4, talcum powder 2-3, gypsum 1.5-2.5, triisopropanolamine 1-2, stearic acid 0.5-1, water 3-5;
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 high green compression strength water-glass sand, comprises the following steps:
(1), by silica sand, diamond dust, lime stone co-grinding, cross after 150-200 mesh sieve and bentonite, bauxite, dioctyl phthalate, lithium ground-slag, talcum powder mixing 2-4min;
(2) add water, gypsum, gum arabic powder, mix 1-2min;
(3) finally add modified water glass, triisopropanolamine, stearic acid, mix 2-3min, shake out.
Beneficial effect of the present invention:
Water-glass sand green compression strength of the present invention is high, and easily molding and repair type, meets the technological requirement of first molding after-hardening completely, and good fluidity, and gas forming amount is low, and good permeability, collapsibility are good, can significantly improve casting quality, reduction casting wasted product rate.
The specific embodiment
A green compression strength water-glass sand, is made by the raw material of following weight (kg): silica sand 60, diamond dust 40, lime stone 12, bentonite 6, bauxite 4, modified water glass 5, gum arabic powder 2, dioctyl phthalate 1.5, lithium ground-slag 3, talcum powder 2, gypsum 2, triisopropanolamine 1.5, stearic acid 0.8, water 4;
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 5, dextrin 3, urea 3, sodium sulfite 2, Sodium Polyacrylate 4, potassium dihydrogen phosphate 3, xylitol 1, polyisobutene 2, calcium lignosulfonate 4, rosin acid polyoxyethylene ester 2, sodium carboxymethylcellulose 1, vermiculite 4, sepiolite 3, nano aluminium oxide 2, jade powder 1.5, plant ash 2, calcium chloride 1.5, sodium chloride 0.6, Di(dioctylpyrophosphato) ethylene titanate 0.5;
(2) by vermiculite, sepiolite mixes, pulverized 100 mesh sieves, then in the powder after sieving, add calcium chloride and sodium chloride, stir, 880 ℃ of calcining 3h, shrend, then be placed in concentration and be 15% hydrochloric acid solution, be heated to boiling speed lapping 15min, the sodium hydroxide solution regulator solution PH that is 15% by concentration is again to neutral, stir 10min, filter, with distilled water, clean filter residue, filter residue after cleaning adds water making beating, and to make solid content be 60% 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 7min, dry, pulverize porphyrize, cross 350 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 1h, obtains modified water glass.
A preparation method for high green compression strength water-glass sand, comprises the following steps:
(1), by silica sand, diamond dust, lime stone co-grinding, cross after 200 mesh sieves and bentonite, bauxite, dioctyl phthalate, lithium ground-slag, talcum powder mixing 3min;
(2) add water, gypsum, gum arabic powder, mix 2min;
(3) finally add modified water glass, triisopropanolamine, stearic acid, mix 2min, shake out.
The performance test of the present embodiment molding sand is as follows:
Green compression strength (kPa): 52
24h tensile strength (MPa): 0.56
Gas permeability: 128
Compact rate of molding (%): 46
Shatter index (%): 83.
Claims (2)
1. one kind high green compression strength water-glass sand, it is characterized in that, by the raw material of following weight portion, made: silica sand 55-75, diamond dust 30-40, lime stone 10-15, bentonite 5-8, bauxite 3-6, modified water glass 4-7, gum arabic powder 2-3, dioctyl phthalate 1-2, lithium ground-slag 3-4, talcum powder 2-3, gypsum 1.5-2.5, triisopropanolamine 1-2, stearic acid 0.5-1, water 3-5;
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 high green compression strength water-glass sand according to claim 1, is characterized in that comprising the following steps:
(1), by silica sand, diamond dust, lime stone co-grinding, cross after 150-200 mesh sieve and bentonite, bauxite, dioctyl phthalate, lithium ground-slag, talcum powder mixing 2-4min;
(2) add water, gypsum, gum arabic powder, mix 1-2min;
(3) finally add modified water glass, triisopropanolamine, stearic acid, mix 2-3min, shake out.
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| CN104942218A (en) * | 2015-06-09 | 2015-09-30 | 含山县兴达球墨铸铁厂 | High-strength molding sand for large steel casting |
| CN105081201A (en) * | 2015-08-14 | 2015-11-25 | 郭伟 | High-lubricity modified composite sodium silicate-bonded sand for steel casting and preparation method of high-lubricity modified composite sodium silicate-bonded sand |
| CN105081223A (en) * | 2015-08-05 | 2015-11-25 | 宁夏苏宁新能源设备有限公司 | Casting molding technology of middle groove shovel plate stopping ledge |
| CN105108037A (en) * | 2015-08-14 | 2015-12-02 | 郭伟 | High-fluidity modified composite water glass sand for steel castings and preparation method thereof |
| CN105108035A (en) * | 2015-08-11 | 2015-12-02 | 陈传松 | Low-thermal-expansion high-strength modified composite sodium silicate-bonded sand for steel casting and preparation method of modified composite sodium silicate-bonded sand |
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| CN105108040A (en) * | 2015-08-14 | 2015-12-02 | 郭伟 | Low-hot-shrinkage-rate modified compound sodium silicate sand for steel castings and preparation method thereof |
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| CN105108041A (en) * | 2015-08-11 | 2015-12-02 | 陈传松 | High strength modified compound sodium silicate sand containing graphite fluoride for steel casting and preparation method thereof |
| CN105108034A (en) * | 2015-08-11 | 2015-12-02 | 陈传松 | Easy-to-collapse magnetic modified composite sodium silicate sand for steel casting and preparation method for easy-to-collapse magnetic modified composite sodium silicate |
| CN105108039A (en) * | 2015-08-14 | 2015-12-02 | 郭伟 | High-temperature anti-sticking modified composite water glass sand for steel castings and preparation method thereof |
| CN105108042A (en) * | 2015-08-11 | 2015-12-02 | 陈传松 | High-thermal-conductivity easily-demolded modified composite water-glass sand for steel castings and preparation method thereof |
| CN105414465A (en) * | 2015-11-23 | 2016-03-23 | 合肥李诺新材料贸易有限公司 | High-activity composite modified sodium silicate sand for pump valve castings, and preparation method thereof |
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| CN104475648A (en) * | 2014-11-03 | 2015-04-01 | 繁昌县琦祥铸造厂 | Resin molding sand with characteristics of high heat-resistance and gas permeability, and preparation method thereof |
| CN104646601A (en) * | 2015-01-22 | 2015-05-27 | 安徽省繁昌县皖南阀门铸造有限公司 | Molding sand for large mold core and preparation method thereof |
| CN104942218A (en) * | 2015-06-09 | 2015-09-30 | 含山县兴达球墨铸铁厂 | High-strength molding sand for large steel casting |
| CN105081223A (en) * | 2015-08-05 | 2015-11-25 | 宁夏苏宁新能源设备有限公司 | Casting molding technology of middle groove shovel plate stopping ledge |
| CN105108036A (en) * | 2015-08-11 | 2015-12-02 | 陈传松 | High-permeability light modified composite water glass sand for steel casting and preparation method of high-permeability light modified composite water glass sand |
| CN105108035A (en) * | 2015-08-11 | 2015-12-02 | 陈传松 | Low-thermal-expansion high-strength modified composite sodium silicate-bonded sand for steel casting and preparation method of modified composite sodium silicate-bonded sand |
| CN105108041A (en) * | 2015-08-11 | 2015-12-02 | 陈传松 | High strength modified compound sodium silicate sand containing graphite fluoride for steel casting and preparation method thereof |
| CN105108034A (en) * | 2015-08-11 | 2015-12-02 | 陈传松 | Easy-to-collapse magnetic modified composite sodium silicate sand for steel casting and preparation method for easy-to-collapse magnetic modified composite sodium silicate |
| CN105108042A (en) * | 2015-08-11 | 2015-12-02 | 陈传松 | High-thermal-conductivity easily-demolded modified composite water-glass sand for steel castings and preparation method thereof |
| CN105108038A (en) * | 2015-08-14 | 2015-12-02 | 郭伟 | High-collapsibility hydrotalcite modified composite sodium silicate-bonded sand for steel casting and preparation method of composite sodium silicate-bonded sand |
| CN105108040A (en) * | 2015-08-14 | 2015-12-02 | 郭伟 | Low-hot-shrinkage-rate modified compound sodium silicate sand for steel castings and preparation method thereof |
| CN105108037A (en) * | 2015-08-14 | 2015-12-02 | 郭伟 | High-fluidity modified composite water glass sand for steel castings and preparation method thereof |
| CN105108039A (en) * | 2015-08-14 | 2015-12-02 | 郭伟 | High-temperature anti-sticking modified composite water glass sand for steel castings and preparation method thereof |
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| 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 |
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| 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 |
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| CN105562582A (en) * | 2016-02-01 | 2016-05-11 | 安徽埃斯克制泵有限公司 | Casting sand for pump body sand mold casting |
| CN105964928A (en) * | 2016-02-18 | 2016-09-28 | 蚌埠市鸿安精密机械有限公司 | Potassium titanate whisker-reinforced water-soluble mold core and preparation method thereof |
| CN105964927A (en) * | 2016-02-18 | 2016-09-28 | 蚌埠市鸿安精密机械有限公司 | Diatomite-EVA emulsion composite water-soluble mold core and preparation method thereof |
| CN106001389A (en) * | 2016-07-29 | 2016-10-12 | 无锡市三峰仪器设备有限公司 | Environment-friendly sodium silicate-bonded sand for instrument casting |
| CN106077435A (en) * | 2016-08-18 | 2016-11-09 | 江阴联华铸造有限公司 | A kind of train wheel casting wet type clay core sand and preparation method thereof |
| CN106077436A (en) * | 2016-08-23 | 2016-11-09 | 蚌埠精科机床制造有限公司 | A kind of preparation method of lathe casting water glass clay composite sand |
| CN107457346A (en) * | 2017-09-28 | 2017-12-12 | 江苏闽江矿业有限公司 | A kind of sodium silicate sand with high wet-compressive strength |
| CN107457347A (en) * | 2017-09-28 | 2017-12-12 | 江苏闽江矿业有限公司 | A kind of high collapsibility water-glass sand |
| CN107598070A (en) * | 2017-09-28 | 2018-01-19 | 江苏闽江矿业有限公司 | A kind of water-glass sand |
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