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A kind of pre-sorting steel slag phase separation clinker cement production process

A technology of clinker cement and production process, which is applied in the direction of cement production, etc., can solve problems such as cement enterprises' concerns about mixing uniformity, and achieve the effects of increasing initiative and guarantee rate, high flexural strength, and improving utilization efficiency

Active Publication Date: 2020-01-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the fine particles in steel slag can be effectively mixed with raw materials in the above technologies, cement enterprises always have concerns about the uniformity of mixing during the promotion process

Method used

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  • A kind of pre-sorting steel slag phase separation clinker cement production process

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Comparison scheme
Effect test

Embodiment 1

[0031] The present embodiment provides a kind of pre-sorting steel slag phase separation clinker cement production process, which comprises the following steps:

[0032] 1) After the steel slag is pre-sorted by wind force or vibration screening and iron is selected, the coarse particles are added to the feeding end of the last cyclone tube of the new dry firing system or the lower end of the lower smoke chamber of the calciner, and the fine particles are fed into the raw material. The feed mill is used as the raw material for correcting iron quality. The added amount of the fine-grained steel slag is 6.2wt% of the raw meal, the KH value of the raw meal ratio is increased by 0.02, the silicon rate can be increased by 0.05, and the aluminum rate can be increased by 0.1. The add-on of described crude steel slag is 5wt% of clinker output;

[0033] 2) Calcining in a rotary kiln after mixing to produce a phase-separated clinker in which the Portland cement clinker phase and heat tre...

Embodiment 2

[0037] The present embodiment provides a kind of pre-sorting steel slag phase separation clinker cement production process, which comprises the following steps:

[0038] 1) After the steel slag is pre-sorted by wind force or vibration screening and iron is selected, the coarse particles are added to the feeding end of the last cyclone tube of the new dry firing system or the lower end of the lower smoke chamber of the calciner, and the fine particles are fed into the raw material. The feed mill is used as the raw material for correcting the iron quality. The added amount of the fine-grained steel slag is 6.0wt% of the raw meal. The KH value of the raw meal ratio is increased by 0.03, the silicon rate can be increased by 0.3, and the aluminum rate can be increased by 0.2. The addition of described coarse steel slag is 10wt% of clinker output;

[0039] 2) Calcining in a rotary kiln after mixing to produce a phase-separated clinker in which the Portland cement clinker phase and h...

Embodiment 3

[0043] The present embodiment provides a kind of pre-sorting steel slag phase separation clinker cement production process, which comprises the following steps:

[0044] 1) After the steel slag is pre-sorted by wind force or vibration screening and iron is selected, the coarse particles are added to the feeding end of the last cyclone tube of the new dry firing system or the lower end of the lower smoke chamber of the calciner, and the fine particles are fed into the raw material. The feed mill is used as the raw material for correcting iron quality. The added amount of the fine-grained steel slag is 4.9wt% of the raw meal. The KH value of the raw meal ratio is increased by 0.04, the silicon rate can be increased by 0.3, and the aluminum rate can be increased by 0.4. The add-on of described crude steel slag is 15wt% of clinker output;

[0045]2) Calcining in a rotary kiln after mixing to produce a phase-separated clinker in which the Portland cement clinker phase and heat trea...

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Abstract

The invention discloses a production technology of pre-sorted steel slag phase-splitting clinker cement. The production technology comprises the following steps of 1, selecting crushed steel slag after iron sorting, pre-sorting by wind force or a vibration sieve, sorting iron, and respectively sorting steel slag coarse particle with particle size of 0.075mm to 20nm and steel slag fine particle with particle size lower than 0.6mm for further use; 2, mixing the raw material and the steel slag fine particle which accounts for 4 to 6.5wt% of the raw material, and grinding to form the steel slag mixed raw material; mixing the steel slag coarse particle and the steel slag mixed raw material, and calcining at high temperature, so as to obtain the steel slag phase-splitting clinker, wherein the steel slag coarse particle accounts for 5 to 35wt% of the clinker; 3, mixing the steel slag fine particle and the steel slag phase-splitting clinker, and grinding into the pre-sorted steel slag phase-splitting clinker cement, wherein the steel slag fine particle accounts for 5wt% of cement. The production technology of the pre-sorted steel slag phase-splitting clinker cement can solve the problem ofoperation degree of mixing uniformity of the steel slag fine particle and the raw material in the steel slag phase-splitting clinker preparation process.

Description

technical field [0001] The invention relates to the application field of building materials and solid waste, in particular to a production process for preparing pre-sorted steel slag and phase-separated clinker. Background technique [0002] my country's steel production ranks first in the world (accounting for about 50% of the world). In 2014, the steel slag production was about 125 million tons, and the current comprehensive utilization rate is less than 15%. Among them, the cement industry is the main way for the comprehensive utilization of steel slag. In order to break through the two major restrictive factors (stability and grindability) in the popularization and application of steel slag, in 2013, the inventor invented the patent "a process for calcining phase-separated clinker with high-calcium granular slag" 201310571233.2, which is technically and economically The benefits are considerable. According to the status quo of steel slag disposal in my country, on the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/147
CPCY02P40/10
Inventor 沈卫国李剑超李将伟张武宗张宇星霍旭佳黄海巍刘安琪
Owner WUHAN UNIV OF TECH