CN104177117A - Method for preparing foamed ceramic from slag - Google Patents
Method for preparing foamed ceramic from slag Download PDFInfo
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- CN104177117A CN104177117A CN201410378454.2A CN201410378454A CN104177117A CN 104177117 A CN104177117 A CN 104177117A CN 201410378454 A CN201410378454 A CN 201410378454A CN 104177117 A CN104177117 A CN 104177117A
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- slag
- nickel
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- foamed ceramic
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
The invention discloses a method for preparing foamed ceramic from slag. The method comprises the following steps: by selecting nickel-smelting water-quenching slag (short for slag) discharged after refining ferronickel from laterite-nickel ore as a main raw material, adding a proper amount of kaolin and alumina powder; and preparing the foamed ceramic according to the following technological processes: sorting the nickel-smelting water-quenching slag; crushing; screening; weighing; adding the kaolin; adding the alumina powder; mixing the materials; molding; and sintering. The method is characterized in that the discharged quenched slag for smelting nickel after refining ferronickel by the laterite-nickel ore is selected as the main raw material, no foaming agent or template is utilized, holes which are even in distribution and controllable in size are formed in a sintering body by virtue of chemical reaction of the slag, the kaolin and the alumina powder at high temperature, and the foamed ceramic of mullite is finally prepared. The foamed ceramic has the advantages of high compressive strength, high hardness, uniform and beautiful color and low cost and is simple and convenient in pore size control, the slag is fully utilized, and the waste materials are changed into things of value.
Description
Technical field
The invention belongs to foam ceramic material preparation field, relate to one and utilize trade waste smelting nickel shrend slag (hereinafter to be referred as slag) to prepare the manufacture method of porous foam ceramic.
Background technology
Nickel is a kind of important metallic element, very large by the smelting nickel shrend slag output of discharging after red soil nickel ore refining ferronickel, silicon, magnesium, calcium constituent that this slag contains more amount, also contain the beavy metal impurities such as a small amount of ferronickel, at present, slag fully utilizes also seldom, and major part is directly stacked or is used as pavior, have potential environmental hazard, the value of slag is not embodied.
In slag, contain a lot of useful elements, utilize slag to prepare foamed ceramics, both solidified harmful element wherein, developed again new ceramic raw material, promoted the value of slag, avoid potential environmental risk, increase the economic benefit of enterprise.
The foamed ceramics of porous has the advantages such as heat insulating, sound-absorbing insulation, heat-resistant fireproof burning; be widely used in building heat preservation flame retardant area; the foamed ceramics that part ultimate compression strength is high has the function of load-bearing material concurrently; under the requirement of modern save energy, protection of the environment; the high-intensity foamed ceramics of high-quality, as good building thermal insulation material, more and more comes into one's own.
The kind of foamed ceramics is a lot, comprise silicon carbide, aluminum oxide, white olivine etc.The difference of material, the purposes of the preparation method of foamed ceramics and cost and material is also not quite similar.
At present, the preparation method of foamed ceramics, generally has template, whipping agent method, aggregate sintering process etc., and foamed ceramics for building the simplest the most frequently used preparation method is the method that adds whipping agent.
The preparation method of a kind of Zirconium oxide foamed ceramic of application number CN201410063522 invention, adopt zirconia ceramics powder to decide and want raw material, join in the mixture of polyethers or polyester polyol and catalyzer, tensio-active agent and whipping agent and stir, then add solidifying agent, after forming and sintering, obtain.
The preparation method of a kind of insulating foam stupalith of application number CN201410094470 invention, the main raw material using is active attapulgite soil and silane coupling agent, still need to use whipping agent and multiple auxiliary addition agent, and raw material will be through dispersion grinding combination drying repeatedly, finally could obtain desirable compound, form foam ceramic material through oversintering.
The solid waste of utilizing of application number CN201310324533 invention is prepared the method for foamed ceramics self-insulation wall material, and its raw material is made up of major ingredient, admixture.Major ingredient is that chromium slag, coal gangue, ceramic polished waste residue, albite, wilkinite are by the proportioning composition of 25-35%: 19-27%: 20-26%: 17-25%: 1-6%, in major ingredient, add again admixture, after mixing, sieving, put into mould, press forming, dry, at 1120-1180 DEG C, strong reducing property atmosphere is burnt till.
Existing multiple method for preparing foamed ceramics, although some has utilized chromium slag, coal gangue the like waste, but do not utilize smelting nickel shrend slag to do foamed ceramics raw material, and, the foamed ceramics that does not use template to prepare, all needs to add the multiple auxiliary material such as whipping agent, auxiliary agent, exists raw material and subsidiary material kind is more, the shortcomings such as burden process complexity is various, and technological process difficulty repetition rate is low.
Summary of the invention
The present invention is according to the feature of the shrend slag of red soil nickel ore smelting nickel discharge, for the demand of current high-quality building thermal insulation material, adopting the shrend slag discharging after red soil nickel ore refining ferronickel is main raw material, suitably adds kaolin and aluminum oxide powder, after simple and mechanical mixing, makes admixtion.
In this admixtion, the content of each raw material is, the content range of slag is 30%-60%, and common kaolinic content range is 30%-60%, and the content range of aluminum oxide powder is 5%-20%.
The forming method of this admixtion can adopt the method for dry powder moulding, packs in the refractory container of definite shape be laid into green compact by compound; Also can adopt the method for plastic forming, add amount of water and make plastic pug in admixtion, plastic forming becomes to need the green compact of shape.
After the foamed ceramics green compact of forming are dry, adopt normal sintering technique, suitably adjust sintering temperature system, can obtain the foamed ceramics of different pore size rate.
1), to select the slag discharging after red soil nickel ore refining ferronickel be main raw material realizing concrete technical scheme of the present invention is:, the content range of this slag in admixtion is 30%-60%.2), add common kaolin, content is 30%-60%.3), add the aluminum oxide powder of 5%-20%.4), weigh slag, common kaolin and these three kinds of raw materials of aluminum oxide powder, then carry out simple mechanically mixing, become suitable admixtion.5), this admixtion is put into refractory container, be laid into green compact, then high temperature sintering in High Temperature Furnaces Heating Apparatus, can obtain foamed ceramics.6), this admixtion and suitable water can also be in harmonious proportion, make plastic pug, plastic forming becomes green compact, dry after, high temperature sintering in High Temperature Furnaces Heating Apparatus, can obtain foamed ceramics.7), the sintering temperature system of this foamed ceramics is, with the heat-up rate of 2-3 DEG C/point, rise to 1100 DEG C by room temperature, then rise to the highest sintering temperature with the heat-up rate of 0.5-1 DEG C/point by 1100 DEG C, again at the highest sintering temperature insulation 1-3 hour, the temperature range of high sintering temperature is 1300 DEG C-1450 DEG C.
The raw material slag that this foamed ceramics uses, is the mixture of the multiple batches of smelting nickel shrend slag of red soil nickel ore refining ferronickel discharge, and its average chemical component concentration is in table 1.
The average chemical component concentration table of table 1 slag
Main innovation and feature
1), prepare this foamed ceramics and only use slag, kaolin and three kinds of raw materials of aluminum oxide powder, do not add auxiliary material and whipping agent, raw material type is few, cheap wide material sources.
2), getting the raw materials ready and simply uniqueness of moulding process of this foamed ceramics, only need three kinds of raw materials to be simply mixed and made into admixtion, admixtion is laid on the refractory materials of specified shape and may be molded to green compact, or by the admixtion plastic pug of furnishing that adds water, plastic forming becomes green compact, do not need to add whipping agent and auxiliary agent, do not need template yet, there is no repeated procedure for preparation.
3), the foamed ceramics hardness that makes is high, ultimate compression strength is large, fire protection flame retarding is high temperature resistant.
4), cheap for manufacturing cost.Raw materials cost is cheap, in this foamed ceramics, the shared ratio of cheap trade waste slag is 30-60%, and cheap common kaolin content is 30-60%, the addition of commercial alumina powder is 5-20%, and can the lower aluminum oxide powder of using character; Moulding process is with low cost, adopts common dry powder simply to pile up moulding or plastic molding.
5), directly utilize a large amount of trade waste slags, avoided the harm that may cause environment containing the waste of heavy metal nickel, promoted the value of waste, turn waste into wealth.
Embodiment
By following specific embodiment, the present invention is described further.
Embodiment 1:
1), prepare admixtion by the formula of 13.5 grams of slags, 13.7 grams of kaolin, 2.9 grams of aluminum oxide powders, raw materials weighing, puts into agate mortar ground and mixed 5 minutes respectively, makes foamed ceramics admixtion.
2), the admixtion mixing is tiled into the alumina crucible of diameter 30mm, put into sintering oven, be warming up to 1100 DEG C with the heat-up rate of 160 DEG C/h, then be warming up to 1300 DEG C with the heat-up rate of 60 DEG C/h, 1300 DEG C of insulations 2 hours, can obtain the foamed ceramics of bubble aperture 0.5-3mm again.
3), the foamed ceramics that obtains of the method is uniform rice white, integral color is evenly attractive in appearance, main thing is mullite mutually.
Embodiment 2:
1), press 13.2 grams of slags, 12.5 grams of kaolin, the formula that aluminum oxide powder is 2.6 grams is prepared admixtion, respectively raw materials weighing, puts into agate mortar ground and mixed 5 minutes, adds water and makes pug, the shape that plastic molding becomes to need, is dried to green compact.
2), the green compact that make are put into sintering oven, be warming up to 1100 DEG C with the heat-up rate of 150 DEG C/h, be then warming up to 1350 DEG C with the heat-up rate of 40 DEG C/h, then 1350 DEG C of insulations 2 hours, can obtain the foamed ceramics of bubble diameter 3-5mm.
3), the foamed ceramics surface that obtains of the method is light green, air vent aperture narrow range, gas cell distribution is more even, mainly thing is mullite mutually, ultimate compression strength is higher than the sample of embodiment 1.
Embodiment 3:
1), press 13.0 grams of slags, 10.4 grams of kaolin, the formula that aluminum oxide powder is 5.6 grams is prepared admixtion, respectively raw materials weighing, puts into agate mortar ground and mixed 5 minutes, makes foamed ceramics admixtion.
2), the admixtion mixing is tiled into the alumina crucible of diameter 30mm, put into sintering oven, be warming up to 1100 DEG C with the heat-up rate of 180 DEG C/h, then be warming up to 1450 DEG C with the heat-up rate of 60 DEG C/h, 1450 DEG C of insulations 1 hour, can obtain the foamed ceramics of bubble diameter 3-8mm again.
3), the foamed ceramics that obtains of the method light green that is uniformity, sub-translucent, hardness is higher, even air hole distribution is slightly poor, main thing is mullite mutually.
Claims (3)
1. the preparation method of a foamed ceramics, it is characterized in that adopting the smelting nickel shrend slag of red soil nickel ore refining ferronickel discharge is main raw material, smelting nickel shrend slag content range is 30%-60%, add the common kaolin of 30%-60%, add the aluminum oxide powder of 5%-20%, three kinds of simple and mechanical admixtiones that are mixed of raw material, adopt the method for dry powder tiling moulding or plastic forming to make green compact, and green compact high temperature sintering is formed.
2. by foamed ceramics claimed in claim 1, the sintering process system that it is characterized in that this foamed ceramics is, be warming up to 1100 DEG C with the heat-up rate of 2-3 DEG C/min by room temperature, then be warming up to the highest sintering temperature with the heat-up rate of 0.5-1 DEG C/min by 1100 DEG C, at the highest sintering temperature insulation 1-3 hour, the highest sintering range is 1300 DEG C-1450 DEG C again.
3. manufacture a preparation technology for foamed ceramics as claimed in claim 1, the slag of use is the mixture of the multiple batches of smelting nickel shrend slag of red soil nickel ore refining ferronickel discharge, and its average chemistry consists of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410378454.2A CN104177117A (en) | 2014-07-29 | 2014-07-29 | Method for preparing foamed ceramic from slag |
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| CN201410378454.2A CN104177117A (en) | 2014-07-29 | 2014-07-29 | Method for preparing foamed ceramic from slag |
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| CN104177117A true CN104177117A (en) | 2014-12-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859301A (en) * | 2016-04-05 | 2016-08-17 | 盐城工学院 | Silicon nitride ceramic and preparation method thereof |
| CN105884329A (en) * | 2016-04-11 | 2016-08-24 | 南京泰祺瑞新材料科技有限公司 | Luminescent ceramic prepared from magnesium-rich metallurgical nickel slag and preparation method of luminescent ceramic |
| CN110294636A (en) * | 2019-08-16 | 2019-10-01 | 盐城工学院 | A kind of lightweight heat-proof metallurgy of nickel waste residue foamed ceramics and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06144951A (en) * | 1992-11-11 | 1994-05-24 | Hiroyuki Kobayashi | Ceramic foam and production thereof |
| CN103011876A (en) * | 2012-11-23 | 2013-04-03 | 佛山欧神诺陶瓷股份有限公司 | Heat-insulation foamed ceramic plate and preparation method thereof |
-
2014
- 2014-07-29 CN CN201410378454.2A patent/CN104177117A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06144951A (en) * | 1992-11-11 | 1994-05-24 | Hiroyuki Kobayashi | Ceramic foam and production thereof |
| CN103011876A (en) * | 2012-11-23 | 2013-04-03 | 佛山欧神诺陶瓷股份有限公司 | Heat-insulation foamed ceramic plate and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859301A (en) * | 2016-04-05 | 2016-08-17 | 盐城工学院 | Silicon nitride ceramic and preparation method thereof |
| CN105859301B (en) * | 2016-04-05 | 2018-11-27 | 盐城工学院 | A kind of silicon nitride ceramics and preparation method thereof |
| CN105884329A (en) * | 2016-04-11 | 2016-08-24 | 南京泰祺瑞新材料科技有限公司 | Luminescent ceramic prepared from magnesium-rich metallurgical nickel slag and preparation method of luminescent ceramic |
| CN105884329B (en) * | 2016-04-11 | 2019-07-12 | 南京英斯拜科新材料科技有限公司 | A kind of luminescent ceramic and preparation method thereof using the preparation of rich magnesium metallurgy nickel slag |
| CN110294636A (en) * | 2019-08-16 | 2019-10-01 | 盐城工学院 | A kind of lightweight heat-proof metallurgy of nickel waste residue foamed ceramics and preparation method thereof |
| CN110294636B (en) * | 2019-08-16 | 2021-11-23 | 盐城工学院 | Light heat-insulating nickel metallurgy waste residue foamed ceramic and preparation method thereof |
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