Method for preparing carbonized brick from wet-milling 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 preparation cost, and achieves good volume stability and high compressive strength. , the effect of low cost of raw materials

Active Publication Date: 2020-11-03
HUBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • 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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  • Method for preparing carbonized brick from wet-milling carbide slag
  • Method for preparing carbonized brick from wet-milling carbide slag
  • Method for preparing carbonized brick from wet-milling carbide slag

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Experimental program
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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 a carbonized brick from wet-milling carbide slag. The method comprises the following steps: carrying out wet milling on 150-300 parts of carbide slag and75-150 parts of water to realize refining of carbide slag particles and high alkalinity of a liquid phase; preparing 120-200 parts of wet-milled carbide slag slurry, 10-35 parts of gypsum and 50-120 parts of slag as cementing materials, adding 420-865 parts of fine aggregate and 0-18 parts of wate and fully and evenly stirring the components, press-shaping the the stirred raw materials, and performing maintenance in a carbonization chamber to obtain the wet-milling carbide slag carbonized brick. By adopting the method, gas carbon dioxide can be cured, and environmental pollution caused by industrial waste gas is reduced; by utilizing the advantage that the wet-milling carbide slag is easy to carbonize and is easy to react with carbon dioxide to form calcium carbonate, and precipitate and crystal growth have cohesion, the prepared brick is high in strength and short in curing age, the production efficiency is improved, and the brick can effectively replace a common brick for 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 Applications(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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