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Method for producing high-quality slag powder based on desulfurized gypsum

A technology of desulfurized gypsum and slag powder, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor fluidity, which is only suitable for belt transportation, and high water content, so as to improve energy consumption indicators and improve performance , the effect of enhancing activity

Inactive Publication Date: 2019-03-08
JIANGSU RONGDA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] ③ Desulfurization gypsum has high water content, generally around 10% or even higher, and its poor fluidity is only suitable for belt transportation;

Method used

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  • Method for producing high-quality slag powder based on desulfurized gypsum
  • Method for producing high-quality slag powder based on desulfurized gypsum
  • Method for producing high-quality slag powder based on desulfurized gypsum

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Embodiment

[0034] This embodiment is based on the method for producing high-quality slag powder from desulfurized gypsum, such as figure 1 Shown, this production method comprises the steps:

[0035]Step S1: Slag metal removal pretreatment: The slag stored in the mixed storage workshop is grabbed by a 20T driving grab bucket into the slag bin, and then transferred to the No. 16 belt conveyor outside the mixed storage workshop by the No. 15 belt conveyor. Go through the No. 1 self-unloading electromagnetic iron remover to remove iron once, and then enter the electro-hydraulic wear-resistant slide to remove non-magnetic metal once after being detected by the metal detector, and then pass through the cone vibrating screen to crush the unbroken slag and vibrate the cone The aperture of the sieve is 80mm, and the slag with a particle size of less than 80mm is screened out and enters the slag main batching bin. The slag with a particle size of ≥80mm is sent to the stockpile from the vibrating s...

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Abstract

The invention relates to a method for producing high-quality slag powder based on desulfurized gypsum. The production method comprises the following steps: step S1: pretreatment on metal removal of slag; step S2: treatment of desulfurized gypsum; step S3: preparation of mixed slag: firstly, proportioning the desulfurized gypsum and the slag at a weight ratio of (0.5-1):(9.5-9), then feeding the mixture into a rolling mixer for being mixed uniformly, and then feeding into a domestic vertical mill for grinding to produce steel slag powder. The invention has advantages that the production methodprovided by the invention is adopted to simplify a production process and effectively improve performance of the slag powder.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of industrial solid waste, in particular to a method for producing high-quality slag powder based on desulfurized gypsum. Background technique [0002] Desulfurization gypsum is also known as exhaust gas desulfurization gypsum, sulfur gypsum or FGD gypsum. The main components are the same as natural gypsum, calcium sulfate dihydrate, CaSO4 2H 2 O, content ≥ 93%. Desulfurization gypsum is a by-product of the FGD process, which is a technology that uses lime-limestone to recover sulfur dioxide from coal or oil flue gas. The technology is to grind lime-limestone into a slurry, so that the flue gas containing sulfur dioxide after dedusting passes through a slurry scrubber to remove sulfur dioxide, and the lime slurry reacts with sulfur dioxide to form calcium sulfate and calcium sulfite, and calcium sulfite is oxidized Calcium sulfate, to obtain industrial by-product gypsum, called desulfuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/14
CPCC04B40/0042C04B18/141C04B18/064C04B40/0046C04B40/0032Y02W30/91
Inventor 张贤清杨亮
Owner JIANGSU RONGDA NEW MATERIAL
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