Method of preparing baking-free load-bearing bricks through steam curing of semidry desulfurization residues

A semi-dry desulfurization, load-bearing brick technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc. Risks can not be ignored and other issues to achieve the effect of avoiding adverse effects, short maintenance time, and reducing product costs
CN102491707AInactive Publication Date: 2012-06-13HUNAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN UNIV OF SCI & TECH
Publication Date
2012-06-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method of preparing baking-free load-bearing bricks through steam curing of semidry desulfurization residues, belonging to the technical fields of environmental engineering and preparation of construction material. According to the invention, a gelling agent is prepared from semidry desulfurization slag and multi-component powder and is uniformly mixed with inert sandy aggregate in a mixer, water accounting for 10 to 46% of the mass of solid powder is added and uniformly mixed with the solid powder, an obtained mixture undergoes pressure forming and demolding so as to obtain green bricks, and the green bricks are subjected to steam curing at a temperature of 40 to 90 DEG C for 1 to 7 d so as to obtain baking-free bricks with sufficient strength; the baking-free bricks can meet different strength requirements for load-bearing bricks of a model number in a range of MU10 to MU30, have excellent water resistance and can be used as exterior wall tiles. According to the invention, the problem that comprehensive utilization of semidry desulfurization gypsum is not easy due to complex composition of the semidry desulfurization gypsum is overcome; effective usage of solid waste in production of the baking-free bricks which cost less than conventional sintered clay bricks do has great significance to energy conservation and environmental protection.
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Description

technical field

[0001] The invention belongs to the technical field of environmental protection engineering and preparation of building materials, and in particular relates to a method for preparing fire-free load-bearing bricks by steaming and curing semi-dry desulfurization waste residue. Background technique

[0002] Desulfurization and purification of coal-fired flue gas before discharge into the atmosphere is a rapidly developing environmental protection technology at home and abroad. It has been widely used in various major industrial fields. When lime or slaked lime is used as the desulfurization medium, a large amount of desulfurization gypsum will be produced. Early desulfurization technologies were mainly wet and dry. Wet desulfurization produced a large amount of sludge-like desulfurization gypsum, while dry desulfurization products were generally discharged together with fly ash or slag, and desulfurization gypsum would not be discharged separately . Wet desulfu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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