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Method for preparing unburned slag wall bricks by utilizing household garbage burned slag

A technology for domestic waste incineration and wall bricks, which is applied in the field of high-efficiency resource utilization of domestic waste incineration slag to prepare slag-free wall bricks, which can solve problems such as the influence of clinker, and achieve easy operation control, strong technical flexibility, and reduced Effects of Environmental Pollution

Inactive Publication Date: 2011-05-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is improved on the basis of the existing new dry-process cement kiln, and uses slag to replace part of clay and limestone to produce Portland cement clinker, but the harmful components (alkali, chlorine, etc.) etc.) After treatment, it is inevitable that it will still have a certain impact on the clinker

Method used

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  • Method for preparing unburned slag wall bricks by utilizing household garbage burned slag
  • Method for preparing unburned slag wall bricks by utilizing household garbage burned slag
  • Method for preparing unburned slag wall bricks by utilizing household garbage burned slag

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1 (process flow such as figure 1 shown)

[0040] (1) Raw material treatment: first, dry, deodorize, and pass through a 3cm sieve to remove impurities from the domestic waste incinerator slag of Guangzhou Likeng domestic waste incineration power plant, and then perform ball milling. Ball milling is dry ball milling, and the ball milling time is 2 to 5 minutes. After ball milling, the slag is sieved and passed through 0.15cm, 0.3cm, 0.6cm, and 1.18cm sieves respectively. According to the particle size of 0~0.15cm, it accounts for 40% (mass) , 0.15cm-0.3cm accounted for 30% (mass), 0.6-1.18cm accounted for 30% (mass), the slag was mixed.

[0041] (2) Powder preparation: first add 70.2kg of slag, 14.6kg of lime, 7.8kg of gypsum and 4.9kg of cement into the mixing tank according to the formula in Table 1, and then add the activator Na 2 SiO 3 Mix 2.5kg with 10kg of water to make Na 2 SiO 3 Add the aqueous solution to the stirring tank and stir to make the mix...

Embodiment 2

[0046] The difference between this embodiment and embodiment 1 is:

[0047] (2) Powder preparation: first add 69.3kg of slag, 14.4kg of lime, 7.7kg of gypsum and 4.8kg of cement into the mixing tank according to the formula in Table 1, and then add the activator Na 2 SiO 3 Mix 3.8kg with 9kg of water to make Na 2 SiO 3 Add the aqueous solution to the stirring tank and stir to make the mixture uniform and make the water content about 8.2% (by mass). Generally, it is better to hold it to form a ball, and to loosen it with a light touch.

[0048] Raw material processing, compression molding, and natural curing are the same as in Example 1. The physical properties of the prepared slag-free wall bricks are shown in Table 2.

Embodiment 3

[0050] The difference between this embodiment and embodiment 1 is:

[0051] (2) Powder preparation: use a twin-shaft mixer to add 68.3kg of slag, 14.2kg of lime, 7.6kg of gypsum and 4.7kg of cement to the mixing tank according to the formula in Table 1, and then add the activator Na 2 SiO 3 Mix 5.2kg with 12kg of water to make Na 2 SiO 3 Add the aqueous solution to the stirring tank and stir to make the mixture uniform and make the water content about 11% (by mass). Generally, it is better to hold it into a ball and loosen it by light touch.

[0052] Raw material processing, compression molding, and natural curing are the same as in Example 1. The physical properties of the prepared slag-free wall bricks are shown in Table 2.

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Abstract

The invention discloses a method for preparing unburned slag wall bricks by utilizing household garbage burned slag. The method comprises the following steps of: proportioning the following raw materials in percentage by mass: 37.9 to 70.2 percent of household garbage burned slag, 4.7 to 19.0 percent of lime, 4.7 to 23.7 percent of cement, 7.6 to 19.0 percent of gypsum and 2.5 to 5.2 percent of excitant; preparing the excitant into aqueous solution and mixing the aqueous solution and other components in the raw materials to make the water content of the raw materials reach 8 to 12 percent; and pressing, molding, and curing to obtain the unburned slag wall bricks. The method can not only solve the problem of the treatment of current municipal household garbage burned slag to realize the resource utilization of the slag, but also reduce the discharge of the municipal household garbage burned slag so as to reduce the environmental pollution caused by the accumulation and the landfill of the municipal household garbage burned slag; and the method has the advantages that: the slag waste material has high resource utilization rate, the process is simple, the method is convenient to operate, the operating cost is low and the like.

Description

technical field [0001] The invention belongs to the field of comprehensive resource utilization of inorganic materials and solid waste, and specifically refers to a method for efficiently utilizing domestic waste incineration slag (slag for short) to prepare slag-free wall bricks. Background technique [0002] For a long time, the main purpose of my country's urban waste disposal is to find suitable places for disposal, and the harmless disposal rate is extremely low. In recent years, due to less and less available landfill sites in cities and the increase of landfill costs, as well as the limited scale of compost due to market reasons and the quality of compost is not ideal, incineration has been put on the agenda. [0003] As the amount of domestic waste incineration increases year by year, a large amount of solid waste - incineration slag will be produced. Incineration slag is a by-product of municipal solid waste incineration power plants. Domestic waste incineration sl...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/10
CPCC04B2103/10C04B28/14Y02W30/91C04B7/02C04B18/105C04B22/064C04B40/0028C04B40/0071C04B14/045C04B22/062C04B22/142
Inventor 吴清仁杨媛曹旗殷素红
Owner SOUTH CHINA UNIV OF TECH
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