CN105817576A - High-compactness mica powder modified quartz-based lost foam paint and preparation method thereof - Google Patents

High-compactness mica powder modified quartz-based lost foam paint and preparation method thereof Download PDF

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Publication number
CN105817576A
CN105817576A CN201610359438.8A CN201610359438A CN105817576A CN 105817576 A CN105817576 A CN 105817576A CN 201610359438 A CN201610359438 A CN 201610359438A CN 105817576 A CN105817576 A CN 105817576A
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China
Prior art keywords
mica powder
compactness
water
parts
quartz
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CN201610359438.8A
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Chinese (zh)
Inventor
张家俊
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MA'ANSHAN XINGLONG CASTING Co Ltd
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MA'ANSHAN XINGLONG CASTING Co Ltd
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Priority to CN201610359438.8A priority Critical patent/CN105817576A/en
Publication of CN105817576A publication Critical patent/CN105817576A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C3/00Selection of compositions for coating the surfaces of moulds, cores, or patterns

Abstract

The invention discloses high-compactness mica powder modified quartz-based lost foam paint. The high-compactness mica powder modified quartz-based lost foam paint is prepared from, by weight, 100-102 parts of quartz powder, 0.9-1.1 parts of modified starch, 0.9-1.1 parts of carboxymethyl cellulose, 2.4-2.6 parts of sodium bentonite, 0.9-1 part of mica powder, 0.8-0.9 part of tetrapod-shaped zinc oxide whiskers, 0.9-1.1 parts of silica sol, 10-13 parts of alcohol, a defined amount of water, 1-1.2 parts of calcium nitrate tetrahydrate, and 1-1.2 parts of trimethyl phosphate. According to the high-compactness mica powder modified quartz-based lost foam paint, sol is generated through the reaction of the calcium nitrate tetrahydrate and the trimethyl phosphate and distributed uniformly on other raw materials, nano-sized hydroxyapatite is formed on the surfaces of the raw materials such as quartz sand during cast heating, the adsorbability is good, gas can be adsorbed, pores of castings are reduced, and meanwhile the compactness and hardness of a coating are improved.

Description

A kind of high compactness mica powder modification quartz group lost mould coating and preparation method thereof
Technical field
The present invention relates to lost foam paint technical field, particularly relate to a kind of high compactness mica powder modification quartz group lost mould coating and preparation method thereof.
Background technology
Lost foam casting is the foundry engieering of a kind of Near net shape, and coating is the key point of lost foam casting, and the quality of coating property is directly connected to the quality of foundry goods.Lost foam paint is typically made up of refractory aggregate, binding agent, suspending agent, carrier, additive.Silica flour is widely used on lost foam casting as refractory aggregate cheap and easy to get, but because sintering character is poor so that it is application receives certain restriction.And the principle that lost foam paint is at the beginning of design should sinter exactly, peel off again.If sintering character can be poor under pouring temperature for refractory aggregate, then can not form the liquid phase of q.s.So coating cannot form densification and have the sinter layer of sufficient intensity, bears incessantly molten metal washing away when cast, corrosion function, and molten metal can pass through coating erosion casting mold, and foundry goods is easily generated the defects such as scab.Even if not causing scab the most easily to produce coating be bonded at the phenomenon being not easily stripped on foundry goods.The major measure improving lost foam paint sintering character has: 1. introduce suitable sintering aid, utilizes the liquid phase that sintering aid is formed, and reaches the purpose accelerating material diffusion with acceleration of sintering;2. formed composite aggregate, fusing point reduction and the temperature starting to sinter by the refractory aggregate that fusing point is different also to decrease.If selecting suitable composite aggregate and proportioning, then coating can be made to produce a certain degree of sintering under pouring temperature.This problem uses mica powder to improve the sintering character of quartz group lost mould coating as sintering aid." mica powder impact on quartz group lost mould coating sintering character " literary composition have developed a kind of lost foam paint with high refractoriness and low grade fever's node, and this coating has good sintering character and stripping performance.
But Muscovitum bad dispersibility in coating, suspension are poor, easily cause the bending strength after sintering uneven, and stripping performance is the most uneven, and Muscovitum slabbing, can obstructing air holes, affect gas and discharges, cause bleb phenomenon, need improvement.
Additionally also need to improve the problems such as the hardness of coating, compactness, elevated temperature strength, crack resistance, breathability, bending strength, sag resistance, brushing performance, agglutinating property along with the progress of foundry engieering.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of high compactness mica powder modification quartz group lost mould coating and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of high compactness mica powder modification quartz group lost mould coating, is prepared by the raw materials in: silica flour 100-102, modified starch 0.9-1.1, carboxymethyl cellulose 0.9-1.1, sodium bentonite 2.4-2.6, mica powder 0.9-1, four acicular type zinc oxide crystal whisker 0.8-0.9, Ludox 0.9-1.1, ethanol 10-13, water are appropriate, four water-calcium nitrate 1-1.2, trimethyl phosphate 1-1.2.
The preparation method of described high compactness mica powder modification quartz group lost mould coating, comprises the following steps:
(1) Ludox is added in ethanol, stir, add mica powder to stir, be heated to 60-70 DEG C, add four acicular type zinc oxide crystal whisker while stirring, it is heated to 70-75 DEG C, ultrasonic disperse 3-4 minute, continues stirring complete to ethanol volatilization, pulverizes, cross 100-150 mesh sieve, obtain modified micaceous powder;
(2) four water-calcium nitrate is dissolved in the water of 12-13 weight portion, obtains four water-calcium nitrate solution, trimethyl phosphate is added in the dehydrated alcohol of 3-3.5 weight portion, regulation pH value is 8-8.5, it is heated to 79-82 DEG C, stirs 8-9 hour under 200-250 rev/min, obtain colloidal sol;
(3) modified starch, carboxymethyl cellulose, sodium bentonite are added to the water, stir, add described modified micaceous powder and described colloidal sol, stir, obtain mixed material;
(4) described mixed material and other leftover materials are mixed into pasty state, to obtain final product.
The invention have the advantage that the application uses Ludox, lithium magnesium silicate, four acicular type zinc oxide crystal whisker to be modified mica powder, define on mica powder surface nano silicon and and four acicular type zinc oxide crystal whisker, the dispersion stabilization making mica powder improves, and whisker can improve the caking property of mica powder and silica flour, improve cracking resistance, there is whisker to support after sintering and define uniform pore, promote that gas is discharged, reduce bleb.By using four water-calcium nitrate, trimethyl phosphate to define colloidal sol by reaction, it is evenly distributed on other raw materials, nano level hydroxyapatite is defined on the surface of the raw materials such as quartz sand when casting is heated, excellent adsorption, can adsorbed gas, reduce the pore of foundry goods, improve compactness and the intensity of coating simultaneously.
Detailed description of the invention
A kind of high compactness mica powder modification quartz group lost mould coating, is made up of the raw material of following weight portion (kilogram): silica flour 100, modified starch 0.9, carboxymethyl cellulose 0.9, sodium bentonite 2.4, mica powder 0.9, four acicular type zinc oxide crystal whisker 0.8, Ludox 0.9, ethanol 10, water are appropriate, four water-calcium nitrate 1, trimethyl phosphate 1.
The preparation method of described high compactness mica powder modification quartz group lost mould coating, comprises the following steps:
(1) Ludox is added in ethanol, stir, add mica powder and stir, be heated to 60 DEG C, add four acicular type zinc oxide crystal whisker while stirring, be heated to 70 DEG C, ultrasonic disperse 3 minutes, continues stirring complete to ethanol volatilization, pulverize, cross 100 mesh sieves, obtain modified micaceous powder;
(2) being dissolved in by four water-calcium nitrate in the water of 12 weight portions, obtain four water-calcium nitrate solution, added by trimethyl phosphate in the dehydrated alcohol of 3 weight portions, regulation pH value is 8, is heated to 79 DEG C, stirs 8 hours, obtain colloidal sol under 200 revs/min;
(3) modified starch, carboxymethyl cellulose, sodium bentonite are added to the water, stir, add described modified micaceous powder and described colloidal sol, stir, obtain mixed material;
(4) described mixed material and other leftover materials are mixed into pasty state, to obtain final product.
Being sintered at 1500 DEG C by this embodiment lost foam paint, observed by microscope, internal a small amount of macroscopic void and the most tiny small holes, in a block entirety, fissility has reached I grade, and bending strength is 8.8MPa.

Claims (2)

1. a high compactness mica powder modification quartz group lost mould coating, it is characterised in that: it is prepared by the raw materials in: silica flour 100-102, modified starch 0.9-1.1, carboxymethyl cellulose 0.9-1.1, sodium bentonite 2.4-2.6, mica powder 0.9-1, four acicular type zinc oxide crystal whisker 0.8-0.9, Ludox 0.9-1.1, ethanol 10-13, water are appropriate, four water-calcium nitrate 1-1.2, trimethyl phosphate 1-1.2.
The preparation method of high compactness mica powder modification quartz group lost mould coating the most according to claim 1, it is characterised in that comprise the following steps:
(1) Ludox is added in ethanol, stir, add mica powder to stir, be heated to 60-70 DEG C, add four acicular type zinc oxide crystal whisker while stirring, it is heated to 70-75 DEG C, ultrasonic disperse 3-4 minute, continues stirring complete to ethanol volatilization, pulverizes, cross 100-150 mesh sieve, obtain modified micaceous powder;
(2) four water-calcium nitrate is dissolved in the water of 12-13 weight portion, obtains four water-calcium nitrate solution, trimethyl phosphate is added in the dehydrated alcohol of 3-3.5 weight portion, regulation pH value is 8-8.5, it is heated to 79-82 DEG C, stirs 8-9 hour under 200-250 rev/min, obtain colloidal sol;
(3) modified starch, carboxymethyl cellulose, sodium bentonite are added to the water, stir, add described modified micaceous powder and described colloidal sol, stir, obtain mixed material;
(4) described mixed material and other leftover materials are mixed into pasty state, to obtain final product.
CN201610359438.8A 2016-05-27 2016-05-27 High-compactness mica powder modified quartz-based lost foam paint and preparation method thereof Withdrawn CN105817576A (en)

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CN201610359438.8A CN105817576A (en) 2016-05-27 2016-05-27 High-compactness mica powder modified quartz-based lost foam paint and preparation method thereof

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Application Number Priority Date Filing Date Title
CN201610359438.8A CN105817576A (en) 2016-05-27 2016-05-27 High-compactness mica powder modified quartz-based lost foam paint and preparation method thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106141078A (en) * 2016-08-30 2016-11-23 阜阳市富鑫铸造机械有限公司 A kind of dispellable mould casting isopropyl alcohol-base paint of the easy demoulding of high-lubricity and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1557774A (en) * 2004-01-16 2004-12-29 东南大学 Method for preparing calcium phosphate series bioceramic nano-powder
CN102179473A (en) * 2011-05-11 2011-09-14 李华山 Lost foam casting composite coating
CN103360944A (en) * 2012-04-06 2013-10-23 邹永胜 Non-toxic and harmless interior wall coating
CN104893402A (en) * 2015-06-25 2015-09-09 司徒建辉 Plasticizer for coatings
CN105562595A (en) * 2016-01-19 2016-05-11 安徽涌畅铸件有限公司 Coating with high binding performance for full mold and preparation method of coating

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1557774A (en) * 2004-01-16 2004-12-29 东南大学 Method for preparing calcium phosphate series bioceramic nano-powder
CN102179473A (en) * 2011-05-11 2011-09-14 李华山 Lost foam casting composite coating
CN103360944A (en) * 2012-04-06 2013-10-23 邹永胜 Non-toxic and harmless interior wall coating
CN104893402A (en) * 2015-06-25 2015-09-09 司徒建辉 Plasticizer for coatings
CN105562595A (en) * 2016-01-19 2016-05-11 安徽涌畅铸件有限公司 Coating with high binding performance for full mold and preparation method of coating

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106141078A (en) * 2016-08-30 2016-11-23 阜阳市富鑫铸造机械有限公司 A kind of dispellable mould casting isopropyl alcohol-base paint of the easy demoulding of high-lubricity and preparation method thereof

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