Preparation method of high wet compressive strength sand binder material

A technology of binder material and wet compressive strength, which is applied in the field of preparation of high wet compressive strength molding sand binder materials, can solve the problems of limited use of binder materials, poor drying performance and wet compressive strength, and achieve Reduce moisture absorption and improve dry tensile strength

Active Publication Date: 2018-11-02
佛山市杨森化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the existing molding sand binder material has poor drying performance and wet compressive strength, resulting in limited use of the binder material, a high wet compressive strength molding sand binder material is provided. Preparation

Method used

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  • Preparation method of high wet compressive strength sand binder material

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example 1

[0018] In parts by weight, weigh 45 parts of mass fraction 90% ethanol solution, 10 parts of monochloroacetic acid, 6 parts of sodium hydroxide, 10 parts of propylene oxide and 10 parts of cornstarch in a mixer, stir and mix and collect the slurry , put the slurry in a three-necked flask, stir and mix, and pass nitrogen to remove the air. Control the nitrogen flow rate to 25mL / min. Adjust the pH to 6.5 with 1% hydrochloric acid at room temperature, stir and mix, rinse with 90% absolute ethanol for 3 times, collect the emulsion, filter, and vacuum freeze-dry to obtain modified starch granules; take rapeseed meal and grind it through an 80-mesh sieve , to get the sieved particles and count by weight parts, respectively weigh 55 parts of deionized water, 15 parts of 200 mesh blast furnace slag, 25 parts of sieved particles, 10 parts of potassium permanganate, 25 parts of rapeseed oil, 6 parts of phosphoric acid Anhydride and 15 parts of modified starch granules were placed in a m...

example 2

[0020] In parts by weight, weigh 47 parts of mass fraction 90% ethanol solution, 12 parts of monochloroacetic acid, 7 parts of sodium hydroxide, 12 parts of propylene oxide and 12 parts of cornstarch in a mixer, stir and mix and collect the slurry , put the slurry in a three-necked flask, stir and mix, pass nitrogen to remove the air, control the amount of nitrogen flow to 27mL / min, after the completion of the flow, then keep the reaction at 57°C under nitrogen atmosphere for 7h, let stand and cool to Adjust the pH to 6.5 with 1% hydrochloric acid at room temperature, stir and mix, rinse with 90% absolute ethanol for 4 times, collect the emulsion, filter, and vacuum freeze-dry to obtain modified starch granules; take rapeseed meal and grind it through an 80-mesh sieve , to get the sieved particles and weigh 57 parts of deionized water, 17 parts of 200 mesh blast furnace slag, 27 parts of sieved particles, 12 parts of potassium permanganate, 27 parts of rapeseed oil, and 7 parts...

example 3

[0022] In parts by weight, weigh 50 parts of 90% ethanol solution by mass fraction, 15 parts of monochloroacetic acid, 8 parts of sodium hydroxide, 15 parts of propylene oxide and 15 parts of cornstarch in a mixer, stir and mix and collect the slurry , put the slurry in a three-necked flask, stir and mix, and ventilate the air with nitrogen. Adjust the pH to 6.5 with 1% hydrochloric acid at room temperature, stir and mix, rinse with 90% absolute ethanol for 5 times, collect the emulsion, filter, and vacuum freeze-dry to obtain modified starch granules; take rapeseed meal and grind it through an 80-mesh sieve , to get sieved particles and by weight parts, weigh 60 parts of deionized water, 20 parts of 200 mesh blast furnace slag, 30 parts of sieved particles, 15 parts of potassium permanganate, 30 parts of rapeseed oil, 8 parts of phosphoric acid Anhydride and 20 parts of modified starch granules were placed in a mixer, stirred and mixed at 60 for 30 minutes, allowed to stand a...

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Abstract

The invention relates to a preparation method of a high wet compressive strength sand binder material, which belongs to the technical field of binders. The preparation method is characterized in thatrapeseed dregs and modified starch are used as raw materials to be acidified, one part of substances such as sugar and protein is continuously agglomerated and precipitated under the effect of acid, the structure of one part of substances such as sugar and protein is changed, the substances are cross-linked and polymerized by virtue of the resin effect to form a macromolecular structure, the compatibility with vegetable oil can be improved, so that the high wet compressive strength sand binder material can be used as an active ingredient in the application and drying process of a mold core, and the dry-tensile strength or wet-compressive strength of the mold core can be improved; and by utilizing the high oxidation performance and high dehydration performance of sulfuric acid, the substances such as waxes, sterols, unsaturated fatty acid can generate more structures such as hydroxyl, carbonyl, double bonds, and the structures are further cross-linked in the drying process of the mold core to form a netted structure and also become an active ingredient of the binder, so that the binding performance of the material can be further improved.

Description

technical field [0001] The invention relates to a method for preparing a high wet compressive strength molding sand binder material, which belongs to the technical field of binders. Background technique [0002] As we all know, the molding and core making of the foundry industry consumes a huge amount of organic bonding materials every year, including phenolic resin, furan resin, cold box resin, etc. The toxic and harmful components released during the preparation and production process are harmful to the natural ecological environment. constitutes a great disadvantage. In recent years, with the improvement of environmental protection requirements, some non-toxic or low-toxic binders have been gradually developed. Especially in the 20 years at the end of the last century, foundry workers have successively developed sodium polyacrylate resin binders, polyvinyl alcohol Aqueous solution binder, organic ester air-hardening alkaline resole phenolic resin binder, CO 2 Hardened a...

Claims

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Application Information

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IPC IPC(8): B22C1/16
CPCB22C1/16
Inventor 裘友玖韩桂林
Owner 佛山市杨森化工有限公司
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