Preparation method of slag stones

A technology of stone and slag, which is applied in the field of preparing slag stone from hot blast furnace slag, can solve the problems of high energy consumption of cold blast furnace slag, low utilization rate of blast furnace slag, and high production cost of products, and achieve water saving, low cost, The effect of improving the utilization rate

Inactive Publication Date: 2013-08-28
CHINA BUILDING MATERIALS ACAD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above utilization methods generally use cold blast furnace slag treated by water quenching process as raw material. The energy consumption of cold blast furnace slag in grinding, high temperature melting and heat treatment is extremely high, resulting in high production cost of products using it as raw material At the same time, the water quenching process

Method used

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  • Preparation method of slag stones

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Weigh raw materials: (kg)

[0054] Blast furnace slag 70, quartz sand 20, sodium fluorosilicate 6, soda ash 9, fluorite 2, ammonium dihydrogen phosphate 2, zinc oxide 1.5.

[0055] Preparation of slag stone:

[0056] Step 1: Transfer 70 kg of blast furnace slag discharged from the blast furnace to the glass melting furnace through the insulation slag bag, during which the temperature of the blast furnace slag is not lower than 1350°C;

[0057] Step 2: Put the weighed quartz sand, sodium fluorosilicate, soda ash, fluorite, ammonium dihydrogen phosphate, and zinc oxide into the mixer and mix them evenly to form a mixture, and add the mixture into the preheating furnace Carry out preheating treatment, preheat to 400 ~ 600 ℃ and add to the glass melting furnace;

[0058] Step 3: After the mixture is preheated, it is in gentle contact with the blast furnace slag in the glass melting furnace, and the blast furnace slag in the glass melting furnace and the mixture are heated...

Embodiment 2

[0064] Weigh raw materials: (kg)

[0065] Blast furnace slag 50, quartz sand 30, sodium fluorosilicate 10, soda ash 15, fluorite 4, ammonium dihydrogen phosphate 2.

[0066] Preparation of slag stone:

[0067] Step 1: Transfer 50 kg of blast furnace slag discharged from the blast furnace to the glass melting furnace through the insulation slag bag, during which the temperature of the blast furnace slag is not lower than 1350°C;

[0068] Step 2-step 4: same as embodiment 1;

[0069] Step 5: quickly send the slab into an annealing and crystallization kiln for heat treatment: keep it at 650°C for 2 hours for nucleation treatment, then raise the temperature to 860°C at a rate of 5°C / min and hold it for 1.5 hours for crystallization treatment, Then carry out natural cooling, and cool to room temperature after 2-4 hours;

[0070] Step 6: Cutting, surface grinding and polishing the original slag stone slab as required to obtain slag stone.

[0071] The slag stone material provide...

Embodiment 3

[0073] Blast furnace slag 60, quartz sand 30, sodium fluorosilicate 5, soda ash 9, fluorite 3, ammonium dihydrogen phosphate 1, zinc oxide 2.

[0074] Preparation of slag stone:

[0075] Step 1: Transfer 60 kg of blast furnace slag discharged from the blast furnace to the glass melting furnace through the insulation slag bag, during which the temperature of the blast furnace slag is not lower than 1350°C;

[0076] Step 2-step 3: same as embodiment 1;

[0077] Step 4: The mold is preheated at a constant temperature of 600° C. in an electric furnace for more than 4 hours, and the above-mentioned melt is poured into a preheated mold at a pouring temperature not lower than 400° C. to make a slab with a thickness of 15 mm;

[0078] Step 5: Send the poured slab together with the mold into the annealing and crystallization kiln for heat treatment: heat at 750°C for 1 hour for nucleation treatment, then raise the temperature to 930°C at a rate of 3°C / min and hold for 0.5 hours for cr...

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Abstract

The invention relates to a preparation method of slag stones, belonging to the field of building stone production. The preparation method of slag stones comprises the following steps: transferring blast furnace slag discharged from a blast furnace into a glass furnace through a slag ladle or a slag runner, wherein the temperature of the blast furnace slag is not lower than 1,350 DEG C; evenly mixing other raw materials, preheating and adding into the glass furnace, and carrying out high-temperature melting and subsequent processing to obtain the slag stones. According to the preparation method, the blast furnace slag discharged from the blast furnace is directly fed into the glass furnace through the slag ladle or the slag runner, so that the temperature of the blast furnace slag feeding in the glass furnace is not lower than 1,350 DEG C, the heat of the blast furnace slag is directly utilized to prepare color stones with excellent performance. With the method, not only the water resources can be saved, and the cost can be saved, but also the environment can be protected, the operation is simple and easy, and the industrialization is easy.

Description

technical field [0001] The invention relates to the technical field of building stone production, in particular to a method for preparing slag stone with hot blast furnace slag. Background technique [0002] Blast furnace slag is a kind of waste slag discharged from the blast furnace when smelting pig iron. With the development of my country's iron and steel industry, the discharge of blast furnace slag is increasing day by day, occupying a large amount of land. How to deal with blast furnace slag reasonably and effectively has become a major problem faced by the iron and steel industry. [0003] From the perspective of chemical composition, blast furnace slag is a silicate material, which is a melt at a high temperature of 1400 ° C ~ 1600 ° C, and its main components and mass percentages are: CaO35%-44%, SiO 2 32%-42%, A1 2 o 3 6%-16%, MgO4%-13%, and a small amount of FeO, MnO, CaS, etc. At present, a more reasonable and effective way to deal with blast furnace slag is ...

Claims

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Application Information

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IPC IPC(8): C03C10/06C03C10/04C03C6/10
Inventor 李要辉黄幼榕王晋珍
Owner CHINA BUILDING MATERIALS ACAD
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