Method for preparation of standard brick from fly ash

A technology for fly ash and standard bricks, which is applied in the field of fly ash preparation of standard bricks, can solve the problems of dust, air pollution, river silting, etc., and achieve the effects of protecting the environment, reducing digestion, and reducing production energy consumption.

Inactive Publication Date: 2015-08-12
TAIYUAN IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a large amount of fly ash is not treated, it will cause dust and pollute the atmosphere. If it is discharged into the water system, it will cause river silting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment includes the following steps in sequence

[0027] Ⅰ The mass percentage of each material of the fly ash to prepare the standard brick is

[0028] Fly ash 70%; furnace bottom slag 6%; steel slag 17%;

[0029] Sodium hydroxide 4%; Sodium silicate 3%;

[0030] Dry the bottom slag of the power plant and the steel slag left over from steelmaking at 105°C for 1.5 hours to keep the moisture content below 1%. Bottom slag and steel slag are sieved with brushes with 5mm aperture respectively, and materials with a particle size of less than 5mm are used.

[0031] Take above-mentioned five kinds of materials respectively, each brick adobe is 3kg, each batch of present embodiment produces 340, and five kinds of materials take 1020kg altogether.

[0032] Ⅱ Mixing and molding

[0033] a Follow the steps Ⅰ Put the weighed fly ash, coarse slag, and steel slag in a vertical shaft mixer, and stir for 3 minutes until the materials are evenly stirred to form a mi...

Embodiment 2

[0040] Ⅰ The mass percentage of each material of the fly ash to prepare the standard brick is

[0041] The mass percentage of fly ash to prepare the standard brick material is

[0042] Fly ash 91%; Sodium hydroxide 5%; Sodium silicate 4%;

[0043] The above three materials were weighed respectively. In this embodiment, 170 pieces were produced in each batch, and the three materials weighed 510 kg in total.

[0044] Ⅱ Mixing and molding

[0045] a Follow the steps Ⅰ The proportion of weighed fly ash is placed in a vertical shaft mixer.

[0046] b Dissolve sodium hydroxide and sodium silicate in water whose mass is 15% of fly ash to form a mixed solution, add the mixed solution to the fly ash material, stir for 3 minutes, and form a mixed slurry.

[0047] c Within 30 minutes, put the mixture slurry into the molding machine for molding, the cloth depth is 180mm, and the molding pressure is 10MPa. The molding size is 200 × 90 × 53mm 3 of adobe.

[0048] Ⅲ conser...

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Abstract

The invention relates to a method for preparation of a standard brick from fly ash, the method includes the following steps: I, the raw materials comprise 70%-91% of fly ash, less than or equal to 6% of furnace bottom slag, less than or equal to 17% of steel slag, 4%-5% of sodium hydroxide, 3%-4% of sodium silicate; II, the raw materials are stirred and mixed for molding, to be more specific, a, the raw materials comprising the fly ash, the furnace bottom slag and the steel slag are put into a vertical shaft mixer for mixing for no less than 3 min into a mixed material, b, the sodium hydroxide and the sodium silicate are dissolved in water with the mass of 12-16% of the mass of the mixed material to form a solution mixture, the solution mixture is added into the mixed material while stirring for continuing stirring to form mixed material pulp, and c, within 30 min, the mixed material pulp is put into a molding machine for molding into a green brick; and III, the demolded green brick is cured for no less than 1 days in a curing chamber of 45 to 60 DEG C, and placed at room temperature for no less than 3 days. The method for preparation of the standard brick from the fly ash has high fly ash use ratio.

Description

technical field [0001] The invention relates to a method for preparing standard bricks from fly ash. Background technique [0002] Fly ash is the fine ash collected from the flue gas after coal combustion, and is the main solid waste discharged from coal-fired power plants. Its main component is SiO 2 with Al 3 o 4 , FeO, Fe 2 o 3 wait. Fly ash is one of the largest industrial wastes in my country. With the development of the power industry, the discharge of fly ash from coal-fired power plants has increased year by year. In 2013, the national output of fly ash reached 532 million tons, a year-on-year increase of 2.31%, while the utilization rate was less than 70%. If a large amount of fly ash is not treated, it will cause dust and pollute the atmosphere. If it is discharged into the water system, it will cause river silting. It is particularly urgent to develop high-volume fly ash products. [0003] Fly ash brick is a new type of wall material. With the continuous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26C04B18/08C04B18/14
CPCY02W30/91
Inventor 张美霞何俊廷张慧月
Owner TAIYUAN IRON & STEEL GROUP
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