CN101804659B - Preparation method of light-weighted autoclaved unburned block - Google Patents
Preparation method of light-weighted autoclaved unburned block Download PDFInfo
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- CN101804659B CN101804659B CN2010101400431A CN201010140043A CN101804659B CN 101804659 B CN101804659 B CN 101804659B CN 2010101400431 A CN2010101400431 A CN 2010101400431A CN 201010140043 A CN201010140043 A CN 201010140043A CN 101804659 B CN101804659 B CN 101804659B
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Abstract
The invention relates to a preparation method of a light-weighted autoclaved unburned block, which relates to the integrated utilization of a solid waste. Aerated concrete block waste is crushed into aggregate; dry FGD is mixed with the aggregate, added with water during the stirring and formed, to prepare an adobe; and the adobe is sent into steam to be cured, to prepare the light-weighted autoclaved unburned block. The preparation method of the light-weighted autoclaved unburned block has small finished product density, high strength and lighter weight, realizes the 'zero emission' of the dry FGD in a dry desulfurization process, solves the problem of enterprise product waste piling of the aerated concrete block, and reduces piling sites; the compressive strength and the flexural strength of the unburned block exceed the standard of a national autoclaved lime sand brick superior product; the weight of the produced autoclaved unburned block is 20 percent less than that of the traditional clay brick and autoclaved sand-lime brick on the basis of reaching all strength standards of the traditional red brick; no secondary pollution is produced, and the integrated utilization of resources is realized; and the process is simple, and the investment and treatment cost is low. The preparation method of the light-weighted autoclaved unburned block is universal.
Description
Technical field
The present invention relates to a kind of solid waste comprehensive utilization, especially relating to a kind of is the method that main raw material(s) prepares light-weighted autoclaved unburned block with dry desulfurization ash and air-entrained concrete building block waste material.
Background technology
The boiler of coal-fired power plant and heat supply power plant, and the systems such as sintering machine of steel plant can produce a large amount of sulfur dioxide pollution things in combustion process.In recent years, because dry desulfurizing process has water saving and advantage such as energy-conservation, make this sulfur removal technology more and more receive user's welcome.The desulphurization ash that dry desulfurizing process produces is a kind of high calcium ash, is main component with half-H 2 O calcium sulphate, calcium sulfite hemihydrate, calcium carbonate, calcium hydroxide wherein.If the dry desulfurization ash is not fully utilized, will take a large amount of soils.At present, to the application of dry desulfurization ash, existing both at home and abroad many researchs all concentrate on Important Project, like highway, port and pier construction etc.
Meanwhile, along with country to the building energy-saving environmental protection requirement, domestic a large amount of air-entrained concrete building block production lines of having built over nearly 5 years.According to incomplete statistics, national air-entrained concrete building block production line the general mass of productions is ten million cubic metre production capacity.If the waste material generation rate according to 3%, 50 cubic metres of air-entrained concrete building block enterprises will have the air-entrained concrete building block waste material of nearly 2 ten thousand steres to produce every year.At present, air-entrained concrete building block all belongs to " city type " enterprise, does not have a large amount of soils to supply these waste materials to stack, and a large amount of solid waste that produce have had a strong impact on the ordinary production of enterprise.Because air-entrained concrete building block waste material density is little, structural strength is little, and the comprehensive utilization technique of relevant discarded object also seldom at present.
Publication number is that the application for a patent for invention of CN101352893 provides a kind of method of utilizing semi-dry processed desulfurization gypsum and blast furnace granulated slag production to do mixed masonry mortar, it is characterized in that the blast furnace granulated slag that reaches moisture content 0.01%～1% through oven dry levigate to specific area 400～600m
3/ kg; By weight percentage the pulverized powder (10%～30%) of blast furnace granulated slag, moisture content are mixed in batch mixer at the river sand below 0.5% or mountain sand or desert sand or Gobi desert sand or extra large sand or CHARACTERISTICS OF TAILINGS SAND (60%～80%) at 0.1%～1% semi-dry processed desulfurization gypsum (10%～30%), moisture content, obtain doing and mix masonry mortar.
Notification number is that the utility model patent of CN2546541 provides a kind of blocks with building refuse brick; Be based on pulverizing building waste; Be equipped with brickmaking such as flyash, cement, stone again, brick itself alleviated the quality aspect too much do not consider, simultaneously the formula materials relative complex; Because the adding of more amount such as cement does not realize 100% solid waste comprehensive utilization.
In addition, also have some prescriptions, and the character of dry method, semi-dry desulphurization ash and being used to is produced the report of the technology of steamed brick about wet desulphurization gypsum and fly-ash Preparation cementing material and new type block.
Because blast furnace granulated slag, slag, extra large sand or mine tailing etc. can be applied to cement industry; Relative price is more expensive; The density of these materials is bigger simultaneously; Make that the weighted autoclaved unburned block unit intensity produced is big, the dead-end pore is less, the whole antidetonation and the heat-insulating property of building are not all effectively improved.
Summary of the invention
The object of the present invention is to provide to be fit to utilize two kinds of solid waste the preparation method of a kind of light-weighted autoclaved unburned block of dry desulfurization ash and air-entrained concrete building block waste material.
The present invention includes following steps:
1) the air-entrained concrete building block waste material is broken into aggregate;
2) the dry desulfurization ash is mixed with aggregate, in whipping process, add entry, reshaping gets adobe;
3) adobe is sent in the steam steam-cured, light-weighted autoclaved unburned block.
In step 1), the particle diameter of said aggregate is preferably less than 5mm.
In step 2) in, the pressure of said moulding can be 12～18MPa; Said dry desulfurization ash mixes with aggregate, and by mass percentage, the dry desulfurization ash is 35%～65%, and surplus is aggregate; Said dry desulfurization ash mixes with aggregate, also can add gelling agent, and the addition of said gelling agent by mass percentage, can be dry desulfurization ash and 3%～8% of aggregate total amount.
In step 3), pressure steam-cured in the said steam is preferably 1.2MPa, and temperature is 190 ℃.
Said dry desulfurization ash is the dry desulfurization ash that utilizes boiler of power plant or steel works sintering machine desulphurization system; Because the dry desulfurization ash contains calcium salts such as a large amount of calcium sulfites, calcium sulfate, calcium hydroxide and calcium carbonate, aerating coagulation building block silicon class material and aluminium class material also have the characteristics that hole is big, density is little, therefore utilize dry desulfurization ash and aerating coagulation building block silicon class material and aluminium class material; Two kinds of materials mix; In whipping process, add entry, perhaps add a small amount of gelling agent again, can prepare light-weighted autoclaved unburned block; When especially doing load bearing wall, add the intensity that gelling agent can increase load bearing wall.
This shows that the present invention has following outstanding advantage:
1) finished product density is less, and product not only has higher intensity, and lighter weight.
2) realized having solved air-entrained concrete building block enterprise product waste material and having stacked problem in the dry desulfurizing process " zero-emission " of dry desulfurization ash, reduced and stack the place.
3) treatment effect is good, and non-burning brick compression strength of producing and rupture strength are all above the standard of national autoclaved lime-sand brick high-class product; The weighted autoclaved unburned block of producing reaches on each item intensity based of traditional common brick, and quality is lighter by 20% than conventional clay common brick and autoclaved lime-sand brick.
4) whole process does not produce secondary pollution, farthest realizes the purpose of environmental protection and energy saving, has realized comprehensive utilization of resources simultaneously; Make full use of the reactivity of dry desulfurization ash and air-entrained concrete building block waste material, avoid needing in the traditional mode of production process to add the higher aggregate of big metric density.
5) technology is simple, only need carry out local a small amount of change to the traditional mode of production process, and investment and disposal cost are low.
6) have universality, Technological Economy property is excellent, and the produce market demand of comprehensive utilization, production that very is fit to the dry desulfurization ash of all kinds of calcium backbone method sulfur removal technologies is big, has a extensive future.
7) both solve dry desulfurization ash problem of complex utilization, also solved the stacking problem of air-entrained concrete building block enterprise solid waste simultaneously.Not only realize the comprehensive utilization of two kinds of solid waste, the weighted autoclaved unburned block of producing simultaneously also has light weight, advantages of high strength.
The specific embodiment
Embodiment 1
Certain power plant has built dry desulfurizing process, produces 10000 tons of desulfurizing byproducts per year, and near an air-entrained concrete building block enterprise produces 300000 m per year
3, about 10,000 tons of contracts waste material uses the present invention, utilizes circulating fluidized bed dry desulphurization ash and air-entrained concrete building block waste material.
At first adopt disintegrating machine the air-entrained concrete building block waste material, be broken into the waste material below the 5mm, the dry desulfurization ash, small amounts of waste such as air-entrained concrete building block waste material and plant slag mix at airtight container, add water-powered roller then and press stirring.Utilize traditional non-burning brick equipment to prepare building block.Utilize residual heat of electric power plant steam again, steam in still kettle control and press temperature, steam-cured 6h under 1.2MPa pressure at 190 ℃.Treat that temperature cools down, go out still to finished product, parameters all satisfies the standard-required of national building materials weighted autoclaved unburned block.Wherein the compression strength monolithic is more than 10MPa, and the rupture strength monolithic is more than 2MPa.
Produce the about 1,000 ten thousand standard brick amounts of baking-free building block per year, selling price is more than 3,000,000 yuan.
Embodiment 2
Certain steel mill has built the sintering machine dry method desulfuration system, produces 20000 tons of desulfurizing byproducts per year.Near air-entrained concrete building block enterprise produces 600000 m per year
3, about 20,000 tons of contracts waste material uses the present invention, utilizes circulating fluidized bed dry desulphurization ash and air-entrained concrete building block waste material.
At first adopt disintegrating machine the air-entrained concrete building block waste material, be broken into the waste material below the 5mm, the dry desulfurization ash, the air-entrained concrete building block waste material stirs and steel plant's part steel slag mixes at airtight container, adds water-powered roller then and presses stirring.Utilize traditional non-burning brick equipment to prepare building block.Utilize steel plant's afterheat steam again, steam in still kettle control and press temperature at 190 ℃, steam-cured 6h treats that temperature cools down under 1.2MPa pressure, goes out still to finished product, and parameters all satisfies the standard-required of national building materials weighted autoclaved unburned block.Wherein the compression strength monolithic is more than 10MPa, and the rupture strength monolithic is more than 2MPa.
Produce the about 2,000 ten thousand standard brick amounts of baking-free building block per year, selling price is more than 6,000,000 yuan.
Claims (2)
1. the preparation method of a light-weighted autoclaved unburned block, it is characterized in that may further comprise the steps: 1) the air-entrained concrete building block waste material is broken into aggregate, the particle diameter of said aggregate is less than 5mm;
2) the dry desulfurization ash is mixed with aggregate, add gelling agent; In whipping process, add entry, reshaping gets adobe, and the pressure of said moulding is 12～18MPa; By mass percentage, the dry desulfurization ash is 35%～65%, and surplus is aggregate; The addition of said gelling agent by mass percentage, is dry desulfurization ash and 3%～8% of aggregate total amount;
3) adobe is sent in the steam steam-cured, light-weighted autoclaved unburned block.
2. the preparation method of a kind of light-weighted autoclaved unburned block as claimed in claim 1 is characterized in that in step 3), and steam-cured pressure is 1.2MPa in the said steam, and temperature is 190 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101400431A CN101804659B (en) | 2010-03-31 | 2010-03-31 | Preparation method of light-weighted autoclaved unburned block |
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| CN2010101400431A CN101804659B (en) | 2010-03-31 | 2010-03-31 | Preparation method of light-weighted autoclaved unburned block |
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| CN101804659A CN101804659A (en) | 2010-08-18 |
| CN101804659B true CN101804659B (en) | 2012-01-11 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010173B (en) * | 2010-11-15 | 2012-08-15 | 重庆大学 | Method for preparing heat insulation anti-cracking raw soil bricks |
| CN102674799A (en) * | 2012-05-18 | 2012-09-19 | 武汉钢铁(集团)公司 | Semidry-process sintering desulphurization slag autoclaved building block and production method thereof |
| CN102850012A (en) * | 2012-05-31 | 2013-01-02 | 贵州省建筑材料科学研究设计院 | Manufacturing method of high-calcium solid sulfur ash aerated concrete building blocks |
| CN103664114B (en) * | 2013-11-14 | 2015-07-01 | 河南兴安新型建筑材料有限公司 | Self-heat-insulating fly ash autoclaved aerated concrete block and preparation method thereof |
| CN103755378B (en) * | 2013-12-23 | 2015-12-02 | 武汉理工大学 | A kind of air-entrained concrete building block and preparation method thereof |
| CN107117889A (en) * | 2017-06-26 | 2017-09-01 | 含山县绿源新型材料有限公司 | A kind of cement steam-pressing brisk and its production method |
| CN114349464A (en) * | 2022-01-18 | 2022-04-15 | 湖南皕成科技股份有限公司 | Non-steam-curing building brick produced by using industrial waste residues |
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| TW593198B (en) * | 2002-12-31 | 2004-06-21 | Ind Tech Res Inst | Polymer concrete containing industrial waste as raw material |
| CN1648096A (en) * | 2004-01-31 | 2005-08-03 | 刘兴 | Method for processing building material using lead mine waste slag |
| CN1730424A (en) * | 2005-07-01 | 2006-02-08 | 华中科技大学 | Baking-free calcium-enforced slag brick and its production method |
| CN101654941A (en) * | 2009-09-18 | 2010-02-24 | 武汉钢铁(集团)公司 | High-strength non-evaporating brick and preparation method thereof |
| CN101672081A (en) * | 2009-10-14 | 2010-03-17 | 首钢总公司 | Method for preparing non-fired and non-steamed bricks by using sintering dry desulphurization byproduct |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0415403A (en) * | 1990-05-10 | 1992-01-20 | Toshinori Nanjo | High-temperature refuse incinerator |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW593198B (en) * | 2002-12-31 | 2004-06-21 | Ind Tech Res Inst | Polymer concrete containing industrial waste as raw material |
| CN1648096A (en) * | 2004-01-31 | 2005-08-03 | 刘兴 | Method for processing building material using lead mine waste slag |
| CN1730424A (en) * | 2005-07-01 | 2006-02-08 | 华中科技大学 | Baking-free calcium-enforced slag brick and its production method |
| CN101654941A (en) * | 2009-09-18 | 2010-02-24 | 武汉钢铁(集团)公司 | High-strength non-evaporating brick and preparation method thereof |
| CN101672081A (en) * | 2009-10-14 | 2010-03-17 | 首钢总公司 | Method for preparing non-fired and non-steamed bricks by using sintering dry desulphurization byproduct |
Non-Patent Citations (1)
| Title |
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| JP平4-15403A 1992.01.20 |
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