How to judge the coal ash powder high and low 10

1. Laboratory 2. If there is no laboratory equipment, then find a stone, take some coal and smash it, which can be smashed into a powder ash bottom, and smash a small pointed stone.

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Summary. Hello, glad to answer for you. Fly ash is divided into low-calcium fly ash and high-calcium fly ash.

Usually the color of high-calcium fly ash is yellowish, and the color of low-calcium fly ash is grayish. The fly ash particles are porous honeycomb with a large specific surface area and high adsorption activity, and the particle size range of the particles is. And the bead wall has a porous structure, the porosity is as high as 50%-80%, and it has strong water absorption.

Hello, glad to answer for you. Fly ash is divided into low code local calcium fly ash and high calcium fly ash. Usually the color of high-calcium fly ash is yellowish, and the color of low-calcium fly ash is grayish.

The fly ash particles have a porous honeycomb structure, a large specific surface area, and a high adsorption activity, and the particle size range is as follows. And the bead wall has a porous structure, with a porosity of up to 50%-80%, and has strong water absorption.

The color of fly ash is an important quality index, which can reflect the amount and difference of carbon content, and to a certain extent, it can also reflect the fineness of fly ash. The darker the color, the finer the particle size of the fly ash, and the higher the carbon content.

The fly ash brigade sells Sen Hei shows that the carbon content is large, that is, there are many micropores on the surface of the carbon particles with high loss on ignition, which will increase the water demand, and the direct impact is to reduce the workability of the mixture. Carbon particles have no contribution to the strength, resulting in the decrease of the strength of imitation mu in the product.

Test method for loss on ignition of fly ash, i.eHeat with a crucible and weigh。The details are as follows:

Steps:

1. Weigh about 1g of sample (m1) and place it accurately in a porcelain crucible that has been burned at a constant temperature.

2. Place the lid obliquely on the crucible, put it in the high-temperature electronic furnace and gradually increase the temperature from the low temperature, at 950 1000"C, burn for 15 20min, take out the crucible and put it in a dryer to cool to room temperature, and weigh.

3. Burn repeatedly until the amount is constant.

Fly ash**

Coal-fired fly ash

The effect of flue gas composition on mercury adsorption of fly ash from coal combustion was carried out on a small fixed-bed test bench.

The results showed that in the CO2-O2-N2 system, the mercury adsorption capacity of fly ash was closely related to the concentration of SO2 when SO2 was added alone. Add 0 100 10 ?6HCl, with the increase of HCl concentration, the mercury adsorption capacity of fly ash gradually increases, in 50 10?

6. The best adsorption effect is achieved, and then the mercury adsorption capacity of fly ash is reduced, but the impact is not much worse; The addition of NO alone greatly promotes the adsorption of mercury by fly ash.

When HCl and SO2 act together, the adsorption effect of fly ash on mercury is better than that of SO2 alone, but worse than that of HCl alone. After adding NO, the mercury adsorption efficiency and adsorption capacity of fly ash have been greatly improved. The adsorption of Hg0 by fly ash is the result of the dual effects of physical adsorption and chemical adsorption.

The above information refers to Encyclopedia - Fly Ash.

Dear, I'm glad to answer you for the source of the cave. Bituminous coal powder is a substance extracted from bituminous coal, and its composition mainly includes hail elements such as carbon, oxygen, nitrogen and sulfur, and is composed of calcium carbonate and calcium silicate. It is a very active substance, which can effectively absorb a variety of organic and inorganic substances, and has excellent purification and pollution control effects.

Fly ash is the residue produced after the combustion of bituminous coal, mainly composed of calcium carbonate, calcium silicate, magnesium carbonate, alumina and manganese oxide. It has small particle size, large surface area, good suspension and wettability, good bending resistance and pressure resistance, and can be used as filler, insulation material and building material.