A method for preparing carbonized bricks by wet grinding carbide slag

A technology of carbide slag and carbonized bricks, which is applied in the field of comprehensive utilization of resources, can solve the problems of difficult industrial utilization of carbonized products, low utilization rate of industrial solid waste carbide slag, and high production cost, and achieve good volume stability and meet daily design requirements , The effect of low raw material cost

Active Publication Date: 2022-04-26
HUBEI UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0010] Therefore, the present invention intends to provide a method for preparing carbonized bricks by using wet-grinded carbide slag, aiming at solving the problems of low utilization rate of industrial solid waste carbide slag and environmental pollution, turning waste into treasure, and alleviating the greenhouse effect; It is difficult to obtain technical problems such as industrial utilization, high preparation cost and low efficiency, and it can also increase the added value of products

Method used

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  • A method for preparing carbonized bricks by wet grinding carbide slag
  • A method for preparing carbonized bricks by wet grinding carbide slag
  • A method for preparing carbonized bricks by wet grinding carbide slag

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Embodiment 1

[0044] Step 1. Add 150 parts of carbide slag, 75 parts of water, 0.5 to 3 parts of grinding aid, and add them to the wet mixing mill for wet grinding. The wet grinding time is 0.5, the speed is 400r / min, and the ratio of grinding media ceramic balls is 1.2mm :0.8mm:0.6mm=2:4:4, obtain the wet ground carbide slag slurry of median particle size D(50)=3 μ m;

[0045] Step 2. Take 120 parts of wet-milled calcium carbide slag slurry, 5 parts of desulfurized gypsum, 50 parts of slag, 420 parts of river sand, and iron tailings mixed fine aggregate in step 1, and mix and stir for 90 seconds to obtain a mixed mortar;

[0046] Step 3. Weigh the mixed mortar obtained in step 2 and put it into a molding mold for compression molding. The molding pressure of compression molding is 2MPa, the pressure holding time is 30s, and the mold is demoulded immediately after molding;

[0047] Step 4. Put the demoulded test block in step 3 into a constant temperature and humidity carbonization chamber f...

Embodiment 2

[0049] Step 1. Add 175 parts of carbide slag, 87.5 parts of water, 2 parts of polycarboxylate superplasticizer and aliphatic high-efficiency superplasticizer mixed solution, and add it to the wet mixing mill for wet grinding. The wet grinding time is 0.8h and the speed is 400r / min. , the grinding medium ceramic ball proportioning is 1.2mm:0.8mm:0.6mm=2:4:4, obtains the wet grinding carbide slag slurry of median diameter D (50)=2.3 μ m;

[0050] Step 2. Take 150 parts of wet-milled calcium carbide slag slurry in step 1, 15 parts of phosphogypsum, 85 parts of slag, 600 parts of river sand, mixed fine aggregate of sedimentary sand, and 10 parts of water, and mix and stir for 90 to 180 seconds to obtain a mixed mortar;

[0051] Step 3. Weigh the mixed mortar obtained in step 2 and put it into a molding mold for compression molding. The molding pressure of compression molding is 2-35MPa, the holding time is 30-60s, and the mold is demoulded immediately after molding;

[0052] Step...

Embodiment 3

[0054] Step 1. Add 225 parts of calcium carbide slag, 112.5 parts of water, 2 parts of polycarboxylate superplasticizer, calcium lignosulfonate superplasticizer mixed solution, and add it to the wet mixing mill for wet grinding. The wet grinding time is 1h and the speed is 400r / min, the grinding medium ceramic ball proportioning is 1.2mm:0.8mm:0.6mm=2:4:4, obtains the wet grinding carbide slag slurry of median particle diameter D (50)=0.9 μ m;

[0055] Step 2. Take 175 parts of wet-milled calcium carbide slag slurry in step 1, 27 parts of a mixture of desulfurized gypsum and phosphogypsum, 100 parts of slag, 731 parts of river sand, mixed fine aggregate of tailings sand, 14 parts of water, and mix and stir for 120 seconds , to get mixed mortar;

[0056] Step 3. Weigh the mixed mortar obtained in step 2 and put it into a molding mold for compression molding. The molding pressure of compression molding is 30MPa, the pressure holding time is 45s, and the mold is demoulded immedi...

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Abstract

The invention provides a method for preparing carbonized bricks by wet grinding calcium carbide slag: 150-300 parts of carbide slag and 75-150 parts of water are wet-ground to realize the refinement of carbide slag particles and the high alkalinity of the liquid phase; Wet ground calcium carbide slag slurry, 10-35 parts of gypsum, 50-120 parts of slag as cementing material, add 420-865 parts of fine aggregate, 0-18 parts of water and mix well, and press the raw materials after mixing. , and cured in the carbonization chamber to obtain wet-ground carbide slag carbide bricks. This method can solidify gaseous carbon dioxide and reduce the pollution of industrial waste gas to the environment; taking advantage of the advantage of easy carbonization of wet-ground carbide slag, it is easier to react with carbon dioxide to form calcium carbonate, and the precipitation and crystal growth have cohesive force; the prepared bricks have high strength and are easy to maintain The age is short, the production efficiency is improved, and it can effectively replace ordinary bricks in construction.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of resources, in particular to a method for preparing carbonized bricks by wet grinding carbide slag. Background technique [0002] Carbide slag is a by-product of acetylene gas produced by adding water to calcium carbide. Its chemical reaction formula is: [0003] CaC 2 +2H 2 O=C 2 h 2 +Ca(OH) 2 +127kJ [0004] According to the calculation, every 1t of standard calcium carbide is used to produce acetylene gas (C 2 h 2 ), about 1.16t of carbide slag will be generated. According to the information, the amount of calcium carbide used to synthesize acetylene in my country is about 135 tons every year, and 1.5 million tons of calcium carbide slag will be generated. This makes enterprises and environmental protection departments worried, and they are all looking for reasonable solutions to the storage and use of calcium carbide slag. If so much calcium carbide slag is utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B40/02
CPCC04B28/144C04B40/0231C04B2201/50C04B14/06C04B18/141C04B18/12C04B18/0481C04B2103/52
Inventor 苏英付健健张芸宁赵浩祥吴磊贺行洋郑正旗
Owner HUBEI UNIV OF TECH
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