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Method for preparing cement from municipal solid waste incineration furnace slag

A technology for municipal solid waste and slag incineration, which is applied in cement production, etc., to reduce demand and solve outlet problems

Inactive Publication Date: 2016-07-27
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The object of the present invention is a method for preparing cement from municipal solid waste incineration slag, which can prepare cement through municipal solid waste incineration slag, effectively solving the problem of urban pollutant treatment

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  • Method for preparing cement from municipal solid waste incineration furnace slag

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Embodiment 1

[0046] This embodiment provides a method for preparing cement from municipal solid waste incineration slag, which can be applied in a laboratory to simulate the treatment of municipal solid waste incineration slag. The prepared cement is composed of cement clinker, desulfurized gypsum and incinerator slag particles, and the cement can be obtained after grinding to a certain particle size; it includes the following steps:

[0047] S10 , performing pretreatment on the slag of municipal solid waste incineration.

[0048] In this example, the selected municipal solid waste incineration slag needs to meet the requirements in the "GB18485-2014 Domestic Waste Incineration Pollution Control Standard". , its approximate composition and content (by weight) are: SiO 2 : 48.83%; Al 2 o 3 : 10.56%; Fe 2 o 3 : 6.63%; CaO: 16.06%; MgO: 2.82%; LOI (loss on ignition, Lossonignition): 2.60%; SO 3 : 0.85%; K 2 O: 1.97%; Na 2 O: 4.84%; Cl: 1.14% and other impurities.

[0049] The pretrea...

Embodiment 2

[0062] This embodiment provides a method for preparing cement from municipal solid waste incineration slag, which can be applied in a cement kiln system, thereby realizing the industrial utilization of municipal solid waste incineration slag. The prepared cement is mixed with cement clinker, desulfurized gypsum and incinerator slag particles according to a certain ratio, and then directly ground to a certain particle size; the difference between this embodiment and embodiment 1 is that:

[0063] In step S10, the particle size of the incineration slag particles may be less than 50 mm; in step S20, the particle size of the limestone particles and sandstone particles may also be smaller than 50 mm.

[0064] Wherein, in step S40 of the present embodiment:

[0065]Enter the prepared raw meal from the suspension preheater into the cement kiln system, and burn the prepared raw meal into cement clinker; especially, the difference from the previous new dry process cement kiln is that t...

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Abstract

The invention discloses a method for preparing cement from municipal solid waste incineration furnace slag.According to the method, the municipal solid waste incineration furnace slag substitutes raw materials of the cement to make cement raw meal, portland cement clinker is fired, and safety use of the cement is guaranteed.In the actual cement production process, a bypass air discharging system is arranged, normal operation of a cement kiln is guaranteed, the crusting and blocking phenomena of volatile components which are wrapped and carried by the raw materials to a cement kiln system caused by the circular enrichment rule are eliminated, and quality of a cement product can be guaranteed.By means of the method, waste materials can be changed into things of value, the municipal solid waste incineration furnace slag is adopted as the substitute raw material in the cement production process, on one hand, the effect that the incineration furnace slag is reutilized can be achieved, and on the other hand, the demand for natural raw materials of the cement can be reduced.

Description

technical field [0001] The invention relates to a method for preparing cement from city life garbage incineration slag. Background technique [0002] With the rapid development of urban construction, the discharge of urban waste in my country has also increased sharply, which has become an important factor restricting economic development. How to manage these garbage economically and effectively to prevent pollution is a hot issue in environmental protection. The effective treatment or recycling of waste not only requires high technical requirements, but also requires large investment and treatment costs. The treatment methods of urban waste include direct landfill, composting and incineration, etc. Most of the regions in my country adopt the direct landfill method. With the reduction of landfillable sites and the increase of landfill costs, composting is limited on a large scale due to market reasons and the quality of composting is not ideal, and the waste incineration m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/36C04B7/38
CPCC04B7/26C04B7/36C04B7/38Y02P40/10
Inventor 李寅明陈晓东郝利炜吴学谦
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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