CN1095454C

CN1095454C - Preparation method of flyash hollow brick

Info

Publication number: CN1095454C
Application number: CN00111022A
Authority: CN
Inventors: 杜涛; 卢振清; 唐宽裕
Original assignee: QINGDAO SIHAI NEW-TYPE BUILDING MATERIAL Co Ltd
Current assignee: QINGDAO SIHAI NEW-TYPE BUILDING MATERIAL Co Ltd
Priority date: 2000-04-20
Filing date: 2000-04-20
Publication date: 2002-12-04
Anticipated expiration: 2020-04-20
Also published as: CN1268495A

Abstract

The present invention relates to a method for preparing a hollow brick used for construction by doping fly ash discharged from sea water into clay and using normal steps. Ideal brick making effect is obtained by controlling the addition quantity of the fly ash discharged from sea water. Firstly, the clay and the fly ash discharged from sea water are mixed, pulverized, and aged for 72 hours; the water content of mixed material is controlled, and a green brick stands and is dried after being extruded from an extruding machine; drying time is controlled to enable the hollow brick is made by high temperature sintering in a kiln after the green brick is uniformly dried. The present invention solves the problem of environment and marine pollution brought by the fly ash discharged from sea water by coastal fuel electric plants; the product brick has favorable performance parameters, and can be completely replace brick making by only using clay; consequently, lands are saved.

Description

A kind of preparation method of flyash structural clay tile

The present invention relates to a kind of clay that utilizes and be raw material, the admixture flyash is through the method for craftwork manufacture hollow bricks for building such as base, sintering at high proportion.

Existing building brick, especially hollow brick for building is mainly made for the raw material sintering with the clay, preparation technology's method of this brick is ripe, but since this with the clay be raw material brickmaking, the system watt situation be subjected to state control gradually, its reason is to take a large amount of soils, especially needs to use fertile tilling the land.So in recent years, burn surplus coal ash when people have inquired into the power station thermal power generation and sneak into preparation hollow brick for building in the clay, because in the being seen this brick-making method, its flyash discharges based on fresh water, does not see that as yet the seawater discharge coal ash is used for the situation of brickmaking at present.To the greatest extent the possessor once proposed this scheme, but bigger by containing the seawater amount in the seawater discharge coal ash, and the chlorion composition is higher in the seawater, and the brick of making often is difficult to solve it and analyses white problem, caused the technology for preparing hollow brick for building with flyash to be difficult to realize.

The objective of the invention is to overcome existing brickmaking and occupy a large amount of soils, and the brick of making is than shortcoming such as great, seeking a kind of is raw material with the clay, the admixture flyash forms mixing raw material in high proportion, through common process processes such as base, sintering, by means such as control digestion time and sintering temperatures, solve the flyash hollow brick preparation method that finished bricks is analysed white problem.

In order to realize the foregoing invention purpose, the present invention is a raw material with clay and seawater discharge coal ash, through mixing, pulverize, ageing, the extruding base, step such as standing and drying and sintering is made hollow brick for building, after earlier clay and the flyash that uses seawater towards the generating discharging that ejects being mixed in proportion and pulverize, place in the ageing storehouse after the even ageing of certain hour, send into the hollow mud bar that is squeezed into certain water content in the brick extruding machine again through stirring, again through the base of cutting of routine, standing and drying after the sign indicating number base step, the temperature and the time of drying of control kiln, brick bat drying is evenly sent into again carry out sintering in the stove to form qualified hollow brick.

The present invention with existing simple with clay-brickmaking with add fresh water flyash manufacturing bricks by mixing technology with clay and compare, owing to controlled blending ratio, digestion time, standing and drying temperature and time, make the hollow brick of making overcome seawater and analyse the problem of frost, and effectively utilized compositions such as the contained sodium of seawater, potassium, magnesium, improved the performance of brick; Owing to adopt high admixture ratio, thereby reduced the clay consumption greatly, fully utilize the flyash in coastal power station, solved environment and marine pollution matter.

During the invention process, add the flyash that is removed row by thermal power generation station-service seawater in the ratio of the 30%-85% of clay weight, it adds optimum quantity and should decide according to the plasticity index of used clay; Compound should be full and uniform, and stack in the ageing storehouse ageing through 60-80 hour after pulverizer is ground into finely powdered; When the mixture after the ageing was used for squeezing base, its moisture deal was not more than 26%, and extrusion pressure is 3.5Mpa; During the adobe standing and drying, the temperature of its kiln should be lower than 130 ℃, and time of drying is in 25-30 hour; Owing to compositions such as the sodium that contains higher amount in the adobe, potassium, magnesium, the firing temperature of brick generally is controlled between 1050-1100 ℃, and sintering time is more than 72 hours.

Most preferred embodiment: the clay of selecting neutral plasticity for use, add extra large ash discharge by 50% of its weight, ageing 72 hours, squeezing the preceding mixture water content of base is 25%, extrusion pressure is 3.5Mpa, and 28 hours time of drying during 80 ℃ of drying temperatures, the sintering kiln temperature is controlled at 1060 ℃, sintering 72 hours, the parameter that the hollow brick behind the kiln discharge is surveyed is as follows:

Crushing strength: 17.5Mpa

Anti-folding loading: 11.9KN

Bleed rate: 8%

Dry mass loss: 0.6%

Scum degree: slight

Compare with the hollow brick that is mixed and made into fresh water flyash with pure clay brick of the same type, parameters is improved.

Claims

1, a kind of preparation method of flyash structural clay tile, with clay and seawater discharge coal ash is raw material, make hollow brick for building through steps such as mixing, pulverizing, ageing, extruding base, standing and drying and sintering, the addition content that it is characterized in that flyash is the 30%--85% of clay weight; The digestion time of compound is 60-80 hour; Squeeze the base material moisture and be not more than 26%; The standing and drying temperature should be lower than 130 ℃, and be 25-30 hour time of drying; The stove sintering temperature is 1050-1100 ℃, and sintering time is more than 72 hours.