Method of using industrial solid slag to produce silicate cement for nuclear power engineering

A portland cement and nuclear power engineering technology, applied in cement production, etc., can solve problems such as high alkali content and inability to produce portland cement that meets market requirements, and achieve the goals of protecting the ecological environment, saving costs, and saving natural raw materials Effect

Inactive Publication Date: 2017-02-15
酒钢(集团)宏达建材有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Limestone raw materials, clay raw materials, and iron corrected raw materials for traditional cement productio...

Method used

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  • Method of using industrial solid slag to produce silicate cement for nuclear power engineering

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Embodiment 1

[0029] A method for producing Portland cement for nuclear power engineering from industrial solid waste, using raw materials in proportions by weight: 72.0% of limestone mining waste, 16.0% of silica mining waste, 2.0% of blast furnace slag, and 10.0% of iron ore mining tailings ; After the above raw materials are mixed and ground, they are sequentially subjected to preheater heat exchange, gas-solid separation treatment, decomposition furnace carbonate decomposition, dry rotary kiln calcination, and cooling to obtain Portland cement clinker; the temperature in the middle of the decomposition furnace is 830°C, and the temperature of the tail smoke chamber of the dry rotary kiln is 900°C; the blast furnace water slag is mixed and ground before going through a magnetic separator to remove iron.

Embodiment 2

[0031] A method for producing Portland cement for nuclear power engineering from industrial solid waste, using raw materials in proportions by weight: 75.0% of limestone mining waste, 12.0% of silica mining waste, 1.0% of blast furnace slag, and 12.0% of iron ore mining tailings ; After the above raw materials are mixed and ground, they are sequentially subjected to preheater heat exchange, gas-solid separation treatment, decomposition furnace carbonate decomposition, dry rotary kiln calcination, and cooling to obtain Portland cement clinker; the temperature in the middle of the decomposition furnace The temperature is 850°C, and the temperature of the tail smoke chamber of the dry-process rotary kiln is 950°C; the blast furnace water slag is mixed and ground before going through a magnetic separator to remove iron.

Embodiment 3

[0033] A method for producing Portland cement for nuclear power engineering from industrial solid waste residues. The ratio of raw materials used is: limestone mining waste residue 78.0%, silica mining waste residue 9.0%, blast furnace slag 5.5%, iron ore mining tailings 7.5% ; After the above raw materials are mixed and ground, they are sequentially subjected to preheater heat exchange, gas-solid separation treatment, decomposition furnace carbonate decomposition, dry rotary kiln calcination, and cooling to obtain Portland cement clinker; the temperature in the middle of the decomposition furnace The temperature is 870°C, and the temperature of the tail smoke chamber of the dry rotary kiln is 1000°C; the blast furnace slag is mixed and ground before going through a magnetic separator to remove iron.

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Abstract

The invention relates to a silicate cement production method, and specifically relates to a method of using industrial solid slag to produce silicate cement for nuclear power engineering. The silicate cement comprises the following raw materials in percentage by weight: 72.0 to 78.0% of limestone mining waste, 7.0 to 16.0% of silica mining waste, 1.0 to 5.5% of blast furnace granulated slag, and 8.0 to 12.0% of tailings of iron ore mining. The abovementioned raw materials are mixed and milled and then the powder is subjected to heat change in a pre-heater, a gas-solid separation treatment, carbonate decomposition in a decomposing furnace, calcining in a dry-process rotary kiln, and cooling so as to obtain silicate cement clinker. According to the method, limestone mining waste, silica mining waste, blast furnace granulated slag, and tailings of iron ore mining are taken as the raw materials to produce silicate cement that is qualified for nuclear power engineering, a large amount of natural raw materials is saved, the energy consumption is reduced, the cost is saved, and the ecological environment is protected.

Description

technical field [0001] The invention relates to a method for producing Portland cement, in particular to a method for producing Portland cement for nuclear power engineering from industrial solid waste. Background technique [0002] Cement is the most commonly used bulk building material in nuclear power engineering construction, and its quality directly affects the safety of nuclear power engineering construction and operation. Due to the particularity of nuclear power projects, the requirements for all materials are very strict; the establishment and implementation of the "Portland Cement for Nuclear Power Engineering" GB / T31545-2015 national standard implemented on February 1, 2016, regardless of the localization of nuclear power in my country And security, or the development of my country's special cement industry is very important. [0003] Portland cement used in nuclear power projects has the characteristics of low heat of hydration, high early strength, strong sulfat...

Claims

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Application Information

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IPC IPC(8): C04B7/24
CPCC04B7/24Y02P40/10
Inventor 武学龙常占新鄢平翟胜利赵建清赵小琴
Owner 酒钢(集团)宏达建材有限责任公司
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