Method for producing putty powder by using fly ash as raw material

A technology for fly ash and raw materials, applied in chemical instruments and methods, filling slurry, magnetic separation, etc., can solve the problems of large historical stock and low utilization rate, and achieve improved reaction rate, high production efficiency, and reduced production costs. Effect

Pending Publication Date: 2022-02-11
白吉元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, fly ash is limited by the market demand and the bottleneck of key technology for large-scale utilization, the utilization rate is low, the historical stock is huge, and there are still serious environmental protection disposal problems

Method used

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  • Method for producing putty powder by using fly ash as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 The method shown in the production of a pour as a raw material is prepared in the production of putty powder, and the following steps are specifically including the following steps:

[0026] Step 1: In order to be able to blow the drum, the magnetic selection screening efficiency of the fly ash and the magnetic selection screening effect, and to separate the different components, the prepared fly ash will be delivered through the airflow to the belt In the five-stage vibrating screen of the iron facility, the iron screening is performed. In order to collect different components of the screen, the five-stage vibrating screen is provided with separate settlement collection bins, according to the water content of the water content in the fly ash. 75 ° C, according to the collecting component of the collecting bin, 25 m / s, according to the particle size distribution value in the collection bin, control the fly ash and the airflow volume ratio of 1.5: 100, so tha...

Embodiment 2

[0032] The present embodiment differs from the first embodiment in that the gas flow temperature is 62 ° C, the gas flow rate 17m / s, the fly ash and the gas stream is 1.1: 100; the concentration of the dilute hydrochloric acid in step b is 0.2%. The solid content in the reaction mixture is 12%, the mixing paddle rotational speed 65 rpm, the decolorization reaction is 2 hours; the water is controlled at the time of water washing in step three, and the solid content is 15%, stirred by 65 rpm, medium and pH 8.5. Wash the deionized water; step 5, in step five, polishing it to fineness 320 according to quality standards and demand with users.

Embodiment 3

[0034] The present embodiment differs from Examples 1, 2 in that the gas flow temperature is 69 ° C, the airflow flow rate 21 m / s, the fly ash and the gas stream is 1.3: 100; the concentration of the dilute hydrochloric acid in step b is 0.9%, the solid content in the reaction mixture was 19%, stirred by 75 rpm, and the decolorization reaction was 4 hours; the water was washed in step three to control the solid content of 23%, stirred with a paddle rotation of 75 rpm, medium and pH8 .7, deionized water is washed twice; step five, according to quality standards and the demand for users, it is 760 mesh.

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Abstract

The invention discloses a method for producing putty powder by using fly ash as a raw material, which comprises the following steps: feeding fly ash into a vibrating screen with an iron removal facility, after screening, storing qualified components with the whiteness greater than 76% for later use, adding a decolorizing agent into the components which do not meet the requirements, and after stirring and decolorizing, centrifugally separating solid components, adding water into the collected solid components, stirring, adding a sodium carbonate solution for neutralization reaction, collecting the solid components by a centrifugal separation device, and drying and grinding the components with the whiteness greater than or equal to 76%. According to the method, the fly ash is used as a raw material to produce the putty powder, iron and carbon in the fly ash are removed through simple procedures of magnetic separation screening, decoloration, water washing, drying grinding and the like, the content of separated effective solid components including silicon oxide and aluminum oxide reaches 86% or above, the produced product is stable in physical and chemical properties, excellent in quality and environment-friendly in performance, the whole production process is easy to operate, the production efficiency is high, the fly ash is low in price, and the production cost of the putty powder produced by taking the fly ash as the raw material is reduced by 45%-55% compared with putty powder sold in the current market.

Description

Technical field [0001] The present invention relates to the technical field of building materials, and is specifically a method of producing putty powder in the production of fly ash as raw materials. Background technique [0002] Putty flour is a kind of building decoration material, a substrate used to make a flat to find a flat, lay a good foundation for the next decoration (brush paint lacquer wallpaper). The fly ash is the emissions after the fire power plant pulverization. It is a gray powder, observed under a microscope, can see some spheres and shape irregular particles, which are mainly silicon oxide and alumina, followed by iron, calcium, magnesium, Oxide and carbon of potassium, sodium. According to incomplete statistics, the total production capacity of fly ash in my country has reached more than 100 million tons. Due to the large output, it is mostly used in the field of concrete and industrial additives. At present, fly ash is subject to market demand and large-scal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/34B03C1/30B07B7/06B07B11/04
CPCC09D5/34B03C1/30B07B7/06B07B11/04
Inventor 白吉元
Owner 白吉元
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