CN1359868A - Sintered product with high content of flyash - Google Patents

Abstract

A sintered flyash product with high content of flyash contains flyash (50-90 pts.wt.), sandy soil (10-30 pts.wt.), binder (5-20 pts.wt.) and water. Its advantages are high sinter temp up to 1030-1100 deg.C, high amount of used flyash to reduce environmental pollution, high strength and high freezing and weathering resistance.

Description

Hypertonic powdered coal ash sintered products

(1) technical field:

The present invention relates to a kind of flyash agglomerating goods that utilize, belong to hypertonic powdered coal ash sintered products.

(2) background technology:

The quantity that power plant in all parts of the country at present and heating stove are produced byproduct flyash is very big, environmental pollution is bigger, only Daqing oil field every year with regard to more than 80 ten thousand tons, and utilize various goods consumptions that flyash produces relatively seldom, only just only account for 30% of total amount, only use, do not make full use of this flyash product and make new contribution for society in baking load-bearing brick and tile field at Daqing oil field, application quantity is restricted, and environmental pollution is not thoroughly stopped.

(3) summary of the invention:

Technical problem to be solved by this invention is the problem that the flyash application quantity is restricted and environmental pollution is big.

Adoptable technical scheme is: this hypertonic powdered coal ash sintered products comprises flyash, and its each composition and proportioning are as follows by weight:

A. flyash is 50～90 parts, contains 40～70%SiO ₂, 1～10%Fe ₂O ₃, 10～25%Al ₂O ₃, 10% following CaO, 5% following MgO;

B. sandy soil are 10～30 parts, contain 40～70%SiO ₂, 1～5%Fe ₂O ₃, 5～15%Al ₂O ₃, 5% following CaO, 3% following MgO;

C. binding agent is 5～20 parts, contains 50～60%SiO ₂, 1～10%Fe ₂O ₃, 10～20%Al ₂O ₃, 3% following CaO, 3% following MgO;

D. moisture is 10～20% of total amount.

Above-mentioned binding agent can be wilkinite.

Therefore the beneficial effect of these goods is: because the SiO in this powdered coal ash product ₂, Al ₂O ₃Content is big, and fire performance is good and cause sintering temperature can reach 1030～1100 ℃, and the intensity of its goods, anti-freezing property and wind resistance improve greatly; Moreover when sintered article, the flyash consumption is very big, significantly reduces environmental pollution, makes the flyash application quantity be used widely.

(4) embodiment:

Below with the present invention is further illustrated:

This hypertonic powdered coal ash sintered products comprises flyash, and its each composition and proportioning are as follows by weight:

A. flyash is 50～90 parts, contains 40～70%SiO ₂, 1～10%Fe ₂O ₃, 10～25%Al ₂O ₃, 10% following CaO, 5% following MgO;

B. sandy soil are 10～30 parts, contain 40～70%SiO ₂, 1～5%Fe ₂O ₃, 5～15%Al ₂O ₃, 5% following CaO, 3% following MgO;

C. binding agent can be selected 5～20 parts of wilkinites for use, contains 50～60%SiO ₂, l～10%Fe ₂O ₃, 10～20%Al ₂O ₃, 3% following CaO, 3% following MgO;

D. moisture is 10～20% of total amount.

Can take following three kinds of schemes to describe:

The effect parameter of each scheme is as follows:

The composition that contains by proportioning and each composition itself of last each composition of table as seen, the SiO in this powdered coal ash product ₂, Al ₂O ₃Content is respectively 40～70%, 1 0～25%, is higher than the amount of siliceous, the aluminium of unselected clay, moreover SiO ₂, Al ₂O ₃Fire performance is good and cause the production sintering temperature can reach 1030～1100 ℃, and making that the adhesive property of these goods before moulding is good and causing its intensity that burns out goods is that 15～50Mp, anti-freezing property and wind resistance improve greatly.

In addition, when sintered article, the flyash consumption is greater than the consumption of common heavy-load bearing brick, thermal conductivity O.4～0.5w/mk, significantly reduced environmental pollution, also save consumption simultaneously with the vitrified bond goods, protect farmland.

Claims (2)

1, a kind of hypertonic powdered coal ash sintered products comprises flyash, it is characterized in that: each composition and proportioning are as follows by weight:

A. flyash is 50～90 parts, contains 40～70%SiO ₂, 1～10%Fe ₂O ₃, 10～25%Al ₂O ₃, 10% following CaO, 5% following MgO;

B. sandy soil are 10～30 parts, contain 40～70%SiO ₂, 1～5%Fe ₂O ₃, 5～15%Al ₂O ₃, 5% following CaO, 3% following MgO;

C. binding agent is 5～20 parts, contains 50～60%SiO ₂, 1～10%Fe ₂O ₃, 10～20%Al ₂O ₃, 3% following CaO, 3% following MgO;

D. moisture is 10～20% of total amount.

2, hypertonic powdered coal ash sintered products according to claim 1, it is characterized in that: binding agent can be wilkinite.