Preparation method of high-ferrosilicon tailing autoclaved brick

A high-silicon ferrosilicon tailings and high-silicon ferrosilicon technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of large noise and dust pollution, not easy to promote, and large energy consumption. Achieve the effect of reducing dust and noise pollution, reducing grinding process, and less investment in equipment

Active Publication Date: 2014-01-08
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As mentioned above, the existing technologies for utilizing iron tailings require screening or mechanically grinding the iron tailings into powder, which consumes a lot of energy, and there is a lot of noise and dust pollution in the production process, so it is not easy to popularize

Method used

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  • Preparation method of high-ferrosilicon tailing autoclaved brick

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preparation example Construction

[0022] A method for preparing high-silicon iron tailings autoclaved bricks, comprising the following steps:

[0023] 1. Preparation of high silicon iron tailings powder

[0024] A. Slowly add sulfuric acid with a concentration of 20% to 70% to the untreated iron tailings until the sulfuric acid completely submerges the iron tailings and leave it for 1 to 5 days;

[0025] B. Stir the sample slowly, filter it with a funnel, add water to filter until no sulfuric acid is attached, take it out and dry it to obtain high-silicon iron tailings powder, and the filtrate can be used to prepare ferric sulfate according to the usual method;

[0026] 2. Using the above-mentioned high-silicon iron tailings powder as the main raw material, high-silicon iron tailings pressure-steamed bricks are prepared by steaming

[0027] A. Select raw materials with the following mass ratio

[0028] raw material cement lime plaster Aluminum powder water High silicon iron tailings ...

Embodiment 1

[0037] A method for preparing high-silicon iron tailings autoclaved bricks, comprising the following steps:

[0038] 1. Preparation of high silicon iron tailings powder

[0039] A. Slowly add sulfuric acid with a concentration of 20% to the untreated iron tailings until the sulfuric acid completely submerges the iron tailings and leave it for 1 day;

[0040] The iron tailings are provided by Anshan Iron Mine, and its SiO 2 The mass content is greater than 70%, and its typical chemical composition is shown in the following table:

[0041] Element SiO 2 Al 2 o 3 Fe 2 o 3 FeO CaO MgO K 2 o Na 2 o SO 3 LOI S （%） 76.18 0.61 17.86 2.75 1.16 0.70 0.09 0.10 0.03 0.51 99.3

[0042] B. Stir the sample slowly, filter it with a funnel, add water to filter until no sulfuric acid is attached, take it out and dry it to obtain high-silicon iron tailings powder, and the specific surface area of ​​the powder is measured to be 410m ...

Embodiment 2

[0052] A method for preparing high-silicon iron tailings autoclaved bricks, comprising the following steps:

[0053] 1. Preparation of high silicon iron tailings powder

[0054] A. Slowly add sulfuric acid with a concentration of 20% to the untreated iron tailings until the sulfuric acid completely submerges the iron tailings and leave it for 5 days;

[0055] The iron tailings are provided by Anshan Iron Mine, and its SiO 2 The mass content is greater than 70%, and its typical chemical composition is shown in the following table:

[0056] Element SiO 2 Al 2 o 3 Fe 2 o 3 FeO CaO MgO K 2 o Na 2 o SO 3 LOI S （%） 76.18 0.61 17.86 2.75 1.16 0.70 0.09 0.10 0.03 0.51 99.3

[0057]B. Stir the sample slowly, filter it with a funnel, add water to filter until no sulfuric acid is attached, take it out and dry it to obtain high-silicon iron tailings powder, and the specific surface area of ​​the powder is measured to be 605m ...

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Abstract

The invention discloses a preparation method of a high-ferrosilicon tailing autoclaved brick. The preparation method comprises the following steps: firstly, performing high-ferrosilicon tailing powder preparation, A, slowly adding 20-70% sulfuric acid into untreated iron tailings until the iron tailings are completely soaked into the sulfuric acid, and standing for 1-5 days; B, slowly stirring a sample, filtering the sample by using a funnel, adding water, filtering until no sulfuric acid is attached, taking out the sample, and drying to obtain high-ferrosilicon tailing powder, wherein the filtrate can be prepared into iron sulfate by using a common method; secondly, autoclaving by taking the high-ferrosilicon tailing powder as the main raw material to obtain the high-ferrosilicon tailing autoclaved brick.

Description

technical field [0001] The invention relates to the fields of building materials and environmental protection, in particular to a method for preparing high-silicon iron tailings pressure-steamed bricks. Background technique [0002] Iron tailings are the solid waste left after iron ore has been selected for iron concentrate. With the rapid development of my country's iron and steel industry, the amount of iron ore mining continues to increase, and more and more tailings are discharged from iron ore factories. According to the development report of China Association of Comprehensive Utilization of Resources, in 2009, the total output of tailings in my country reached 1.192 billion tons, accounting for more than 45% of the national industrial solid waste, while the comprehensive utilization rate was only 13.3%, and more than 100 million tons. The discharge and disposal of iron tailings has always been a major problem that plagues the development of the mineral processing indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B18/12
CPCY02W30/91
Inventor 侯贵华诸华军万亚丽张峰
Owner YANCHENG INST OF TECH
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