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Application of carbonatation revolving furnace steel scoria in accelerating carbonic anhydride absorption of ocean

A converter steel slag and carbon dioxide technology, applied in the field of environmental protection and resource utilization

Active Publication Date: 2011-06-15
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there has been no report on the application of converter steel slag to the ocean

Method used

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  • Application of carbonatation revolving furnace steel scoria in accelerating carbonic anhydride absorption of ocean
  • Application of carbonatation revolving furnace steel scoria in accelerating carbonic anhydride absorption of ocean
  • Application of carbonatation revolving furnace steel scoria in accelerating carbonic anhydride absorption of ocean

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Chemical composition analysis of blast furnace slag and converter slag of embodiment 1

[0041] The chemical compositions of blast furnace slag and converter slag were compared, and the results are shown in Table 1.

[0042] Table 1 Chemical composition (%) of blast furnace slag and converter steel slag

[0043]

[0044] It can be seen from Table 1 that the main components of blast furnace slag and converter slag are CaO, MgO, Al 2 o 3 , SiO 2 Four kinds, they account for more than 80% of the total weight of slag. The difference is that the iron content in the converter slag is higher, the TFe content reaches 16-22%, and there is more calcium oxide (fCaO) in the free state, and the P 2 o 5 The content of about 2-3%. Iron and phosphorus are essential nutrients for the growth of marine phytoplankton. A large amount of iron can provide a more sufficient nutrient source for marine phytoplankton, and the presence of a large amount of free calcium oxide will increase...

Embodiment 2

[0045] Carbonation treatment of embodiment 2 converter steel slag

[0046] For carbonation treatment of converter steel slag, see figure 1 . figure 1 Among them, the heating furnace control system 1 and the heating furnace 2 complete the setting and control of the carbonation reaction temperature of the converter steel slag through automatic control; the ebullated bed reactor 3 makes the gas and the converter steel slag mix evenly; the steam condensing device 4 is used for tail gas after reaction Cooling before venting; digital pressure regulator 5 is used for pressure control of tail gas before venting and display and reminder of system pressure safety; flow meter 6 is used for intake flow control; gas heating and supply device 7 pairs enter the ebullated bed reactor The gas is preheated; the regulator 8 is used to control the gas pressure entering the reactor; the gas source 9 is collected industrial waste gas or flue gas, and the laboratory can also use carbon dioxide ga...

Embodiment 3

[0048] Example 3 pH value test of converter steel slag seawater eluate

[0049] Place 2 g of untreated converter steel slag and carbonation-treated converter steel slag with a particle size of 75-150 mesh in 0.3 L of seawater taken from the sea, vibrate in a shaker at room temperature, and measure the The pH value of the eluate after the results are shown in Table 2.

[0050] Table 2 Comparison of pH values ​​of seawater eluate between converter steel slag and carbonated converter steel slag

[0051] pH value

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Abstract

The present invention provides an application of carbonated converter steel dregs in absorption of carbon dioxide by oceans. In the application, the steel scrap in steel enterprises is processed by carbonation, which means industrial waste gas or flue gas is filled into the carbonation device of the converter steel under the conditions of the temperature of 350 to 800 DEG C, the atmospheric pressure of 0.1 to 3.6 and the water vapor of 5 to 25 percent; the reaction lasts 2 to 5 hours; then the converter steel dregs after the treatment of carbonation is thrown into the ocean (in the shape of particles or brick blocks). After being improved through carbonation, the converter steel dregs are used for promoting the ocean to absorb carbon dioxide. Thus the application not only reduces the discharge of greenhouse gasses in the steel industry, but also exerts positive influence on the improvement of the marine ecosystem and the absorption of carbon dioxide by the ocean. At the same time, theapplication also broadens the field of utilizing the resources of converter steel dregs.

Description

technical field [0001] The invention belongs to the field of environmental protection and resource utilization, and specifically relates to the modification treatment of converter steel slag and its secondary utilization, and more specifically relates to the carbonation of converter steel slag and its application in promoting the ocean to absorb carbon dioxide. Background technique [0002] As we all know, global warming is caused by man-made emissions of greenhouse gases, and carbon dioxide accounts for 64% of the greenhouse gases. Therefore, one of the fundamental measures to solve the problem of climate warming is to regulate the carbon dioxide in the atmosphere. The second is to reduce man-made emissions of greenhouse gases. [0003] The ocean is a very large and strong carbon pool. The annual anthropogenic CO produced by humans is reported to be 2 About half stays in the atmosphere, while the rest CO 2 It is absorbed by storage circles such as oceans. Marine phytopl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D9/00
Inventor 董晓丹
Owner BAOSHAN IRON & STEEL CO LTD
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