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Method for efficiently preparing low-cost carbonized brick by utilizing steel slags

A low-cost, carbonized brick technology, applied in the field of comprehensive utilization of resources, can solve the problems of difficult utilization of steel slag carbonized products, low efficiency and high preparation cost, and achieve the effects of accelerating carbonization rate, flexible operation and high carbonization rate.

Active Publication Date: 2019-04-05
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a method for efficiently preparing low-cost carbonized bricks by using steel slag, aiming at solving technical problems such as difficult utilization of steel slag carbonized products, high production cost and low efficiency, and at the same time, it can also increase the added value of products

Method used

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  • Method for efficiently preparing low-cost carbonized brick by utilizing steel slags
  • Method for efficiently preparing low-cost carbonized brick by utilizing steel slags
  • Method for efficiently preparing low-cost carbonized brick by utilizing steel slags

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1. Dry the steel slag to a moisture content of 0-1%, and grind the dried steel slag to a specific surface area of ​​400kg / m 2 and 600kg / m 2 Two parts; and mix uniformly according to the mass ratio of 1:1 to prepare the steel slag mixture; dry the desulfurized gypsum to a moisture content of 0-1%, and grind the dried desulfurized gypsum to a specific surface area of ​​650kg / m 2 ;Dry the iron tailings to a moisture content of 0-1%, and grind the dried iron tailings to a specific surface area of ​​450kg / m 2 ;

[0036] Step 2. The raw materials prepared in step 1 are prepared according to the dry basis weight percentage according to 84.6% of steel slag, 5.4% of desulfurized gypsum, and 10% of iron tailings to obtain a mixed dry material, and add 20% of the total mass of the mixed dry material to the mixed dry material. Water was stirred for 180 seconds to obtain mixed wet powder;

[0037] Step 3. Weigh a certain amount of the mixed wet powder obtained in Step 2 and ...

Embodiment 2

[0042] Step 1. Dry the steel slag to a moisture content of 0-1%, and grind the dried steel slag to a specific surface area of ​​400kg / m 2 and 600kg / m 2 Two parts; and mix uniformly according to the mass ratio of 1:1 to prepare the steel slag mixture; dry the desulfurized gypsum to a moisture content of 0-1%, and grind the dried desulfurized gypsum to a specific surface area of ​​650kg / m 2 ;Dry the ultrabasic rock iron tailings to a moisture content of 0-1%, and grind the dried iron tailings to a specific surface area of ​​450kg / m 2 ;

[0043] Step 2. The raw materials prepared in step 1 are prepared according to the dry basis weight percentage according to 47% of steel slag, 3% of desulfurized gypsum, and 50% of iron tailings to obtain a mixed dry material, and add 20% of the total mass of the mixed dry material to the mixed dry material. Water was stirred for 180 seconds to obtain mixed wet powder;

[0044] Step 3. Weigh a certain amount of the mixed wet powder obtained in...

Embodiment 3

[0049] Step 1. Dry the steel slag to a moisture content of 0-1%, and grind the dried steel slag to a specific surface area of ​​400kg / m 2 and 600kg / m 2 Two parts; mix uniformly according to the mass ratio of 1:1.5 to prepare steel slag mixture; dry the desulfurized gypsum to a moisture content of 0-1%, and grind the dried desulfurized gypsum to a specific surface area of ​​650kg / m 2 ;Dry the river sand to a moisture content of 0-1%;

[0050] Step 2: Mix the raw materials prepared in step 1 with 84.6% of steel slag, 5.4% of desulfurized gypsum, and 10% of river sand to obtain a mixed dry material by weight percentage on a dry basis, and add water accounting for 15% of the total mass of the mixed dry material to the mixed dry material. Stir for 180 seconds to obtain mixed wet powder;

[0051] Step 3. Weigh a certain amount of the mixed wet powder obtained in Step 2 and put it into a molding mold for compression molding, hold the pressure for 1 minute under a molding pressure o...

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Abstract

The invention provides a method for efficiently preparing a low-cost carbonized brick by utilizing steel slags, and belongs to the technical field of comprehensive utilization of resources. The methodincludes, firstly, mixing 45-100% of steel slags, 0-30% of desulfurized gypsum and 0-50% of fine aggregate to prepare a solid mixture; then, adding water accounting for 5-25% of the dry basis mass ofthe solid mixture and uniformly stirring; and after pressing and forming, curing the mixture in a carbonization chamber to obtain the steel slag carbonized building material. The method overcomes thedifficult problem of low comprehensive utilization rate of the steel slags, improves the production efficiency in a compression molding mode, absorbs carbon dioxide in industrial waste gas, can further alleviate the greenhouse effect to a certain extent, and has certain economic benefits, environmental benefits and social benefits, so that the prepared building material has excellent early strength and stability.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of resources, in particular to a method for efficiently preparing low-cost carbonized bricks by utilizing steel slag. Background technique [0002] With the rapid development of China's steel industry, the discharge of steel slag is increasing year by year. my country's steel slag has accumulated more than 1 billion tons, and the annual output has reached about 100 million tons. However, the comprehensive utilization rate of steel slag is only about 30%, and the vast majority of steel slag has not been comprehensively utilized. A large amount of steel slag stockpiled not only occupies land, wastes resources, pollutes the environment, but also poses serious safety hazards. At present, the reuse of steel slag in my country mainly includes the extraction of valuable elements from steel slag, the production of steel slag as building materials, and the use of steel slag as filling ma...

Claims

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Application Information

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IPC IPC(8): C04B28/08C04B40/02
CPCC04B28/082C04B40/0231C04B2201/50C04B2201/52C04B18/064C04B18/12
Inventor 邢奕王雪李佳洁张思奇倪文
Owner UNIV OF SCI & TECH BEIJING
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