Method for preparing polyurethane sheet from sintering flue gas desulfurized ash

A technology for sintering flue gas and polyurethane, applied in chemical instruments and methods, inorganic chemistry, calcium carbonate/strontium/barium, etc., can solve the problems of unstable product performance, unadjustable components, etc. The effect of mitigating negative effects

Inactive Publication Date: 2019-04-16
RONGDE ANJIA NEW MATERIALS FUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is how to effectively promote the reuse of sintered flue gas desulfurization ash in large-scale industries, and solve the problem that its components cannot be adjusted when the existing desulfurization ash is directly used. The problem of unstable performance of the prepared product

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  • Method for preparing polyurethane sheet from sintering flue gas desulfurized ash

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Embodiment 1

[0038] A preferred embodiment of a method for preparing polyurethane boards by sintering flue gas desulfurization ash provided by the present invention is as follows: figure 1 shown, including the following steps:

[0039] Step 1: Separation and purification of desulfurization ash;

[0040] Step 2: surface treatment of light calcium carbonate;

[0041] Step 3: Preparation of polyurethane sheet.

[0042] Step 1 includes the following steps:

[0043] Step 1.1: Take 100 parts by mass of desulfurized ashes and 280 parts by mass of water, put them into the first reactor, stir and react at room temperature for 1 hour, and the reaction stirring speed is 100 rpm; the components of the desulfurized ashes used for the reaction include calcium hydroxide, Calcium carbonate, calcium sulfite; the mass percentage of calcium hydroxide is 8%, the mass percentage of calcium carbonate is 20%, the mass percentage of calcium sulfite is 60%, other such as silicon dioxide, iron oxide, potassium o...

Embodiment 2

[0058] Another preferred embodiment of the present invention comprises the following steps:

[0059] Step 1: Separation and purification of desulfurization ash;

[0060] Step 2: surface treatment of light calcium carbonate;

[0061] Step 3: Preparation of polyurethane sheet.

[0062] Step 1 includes the following steps:

[0063] Step 1.1: Take 100 parts by mass of desulfurized ashes and 280 parts by mass of water, put them into the first reactor, stir and react at room temperature for 1 hour, and the reaction stirring speed is 100 rpm; the components of the desulfurized ashes used for the reaction include calcium hydroxide, Calcium carbonate, calcium sulfite; the mass percentage of calcium hydroxide is 10%, the mass percentage of calcium carbonate is 23%, the mass percentage of calcium sulfite is 60%, other such as silicon dioxide, iron oxide, potassium oxide, chloride Calcium, etc. total 7%;

[0064] Step 1.2: Pass carbon dioxide gas into the first reactor, continue to re...

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Abstract

The invention discloses a method for preparing a polyurethane sheet from sintering flue gas desulfurized ash, and relates to the field of desulfurized ash recycling. The method comprises the followingsteps that 1, the desulfurized ash is separated and purified, and calcium carbonate powder is obtained; 2, light calcium carbonate is subjected to surface treatment, and a polyurethane material A with the light calcium carbonate is obtained; 3, the polyurethane sheet is prepared. By means of the method for preparing the polyurethane sheet from the sintering flue gas desulfurized ash, the sintering flue gas desulfurized ash can be industrially reused on a large scale, the problem that currently, when the desulfurized ash is directly utilized, components cannot be adjusted, the products prepared from various batches of desulfurized ash are unstable in performance are effectively solved, moreover, the performance of the polyurethane sheet obtained by using the method is identical to that ofthe polyurethane sheet prepared from same-quality conventional 200-mesh calcium carbonate.

Description

technical field [0001] The invention relates to the field of desulfurization ash reuse, in particular to a method for preparing polyurethane boards by sintering flue gas desulfurization ash. Background technique [0002] With the development of China's iron and steel industry, steel production has increased significantly. The sharp increase in steel production has led to a large amount of sulfur in ores and fuels being produced in the form of sulfur dioxide during the sintering process. The sulfur dioxide emissions generated during the sintering process account for about 40-60% of the annual emissions of steel companies. Sintering flue gas desulfurization ash refers to The semi-dry desulfurization process is used to add calcium oxide or slaked lime desulfurizer to the flue gas produced by sintering, so that the sulfur-containing components and desulfurizer react chemically to form desulfurization by-products with solid sulfite as the main component. The specific composition...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L75/08C08K9/04C08K3/26C01F11/18
CPCC01F11/181C08K2003/265C08L75/04C08L2205/02C08L75/08C08K9/08C08K9/04C08K3/26
Inventor 王荣
Owner RONGDE ANJIA NEW MATERIALS FUZHOU CO LTD
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