Heavily-doped blast furnace slag cement and preparation method thereof

A technology of blast furnace slag and high dosage, applied in cement production, clinker production and other directions, can solve the problems of increased efficiency, high cost of consumables, and cumbersome production process, and achieves the effect of increasing dosage and saving dosage

Active Publication Date: 2013-04-10
GUANGXI YUFENG CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to overcome the shortcomings of complex and diverse additives, cumbersome production process, large amount of grinding aid, high cost of consumables, and uneven and stable product performance in the existing production of cement processing, and to provide a high-volume blast furnace slag cement and its The preparation method, in which liquid cement grinding aid is used to increase the blending amount of granulated blast furnace slag in ordinary 42.5 Portland cement, and the stability, uniformity and Accuracy, the product mainly consists of cement clinker, granulated blast furnace, limestone, and grinding aid. 2 , SO 3 and NO x emission, to achieve the purpose of comprehensive utilization of resources, energy saving and emission reduction, and at the same time reduce the production cost of ordinary cement and increase benefits

Method used

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  • Heavily-doped blast furnace slag cement and preparation method thereof
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Batching storage: cement clinker, granulated blast furnace slag, and limestone are sent to the batching storage by the conveying system.

[0041] (2) Batching and grinding processing: cement clinker, granulated blast furnace slag, and limestone in the batching warehouse pass through the metering system, and the batching is measured according to the mass ratio of 85:9:6, and then the cement clinker, limestone, The slag belt sends the measured ingredients into the cement mill, starts the cement mill for grinding, the stirring speed is 1200rmp, and the stirring time is 4h.

[0042] (3) Grinding aid dripping: While the cement mill is grinding cement clinker, granulated blast furnace slag, and limestone, the dripping amount of the grinding aid propylene glycol is controlled at 0.025% by a metering pump, and the grinding aid is measured The flow rate controlled by the pump is 120~150L / h, and the grinding aid is evenly dropped into the cement mill from the clinker belt...

Embodiment 2

[0045] (1) Batching storage: cement clinker, granulated blast furnace slag, and limestone are sent to the batching storage by the conveying system.

[0046] (2) Batching and grinding: the cement clinker, granulated blast furnace slag, and limestone in the batching warehouse pass through the metering system, and the batching is measured according to the mass ratio of 78:15:7, and then the cement clinker, limestone, The slag belt sends the measured ingredients into the cement mill, starts the cement mill for grinding, the stirring speed is 1000rmp, and the stirring time is 2.5h.

[0047] (3) Dropping of grinding aids: While the cement mill is grinding cement clinker, granulated blast furnace slag, and limestone, the mixed dropping amount of grinding aids triethanolamine and ammonium acetate is controlled at 0.065% by a metering pump , the flow rate controlled by the grinding aid metering pump is 120~150L / h, the grinding aid is evenly added dropwise from the mixing point to t...

Embodiment 3

[0050] (1) Batching storage: cement clinker, granulated blast furnace slag, and limestone are sent to the batching storage by the conveying system.

[0051] (2) Batching and grinding: the cement clinker, granulated blast furnace slag, and limestone in the batching warehouse pass through the metering system, and the batching is measured according to the mass ratio of 82:12:6, and then the cement clinker, limestone, The slag belt sends the measured ingredients into the cement mill, starts the cement mill for grinding, the stirring speed is 1500rmp, and the stirring time is 3.5h.

[0052] (3) Dropping of grinding aids: While the cement mill is grinding cement clinker, granulated blast furnace slag, and limestone, the mixed dropping amount of grinding aids ammonium acetate and capric acid is controlled at 0.085% by metering pumps , the flow rate controlled by the grinding aid metering pump is 150~160L / h, the grinding aid is evenly added dropwise from the slag belt of the grind...

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Abstract

The invention relates to the technical field of cement production, particularly a heavily-doped blast furnace slag cement and a preparation method thereof. The heavily-doped blast furnace slag cement comprises 75-88% of clinker, 6.5-20% of blast furnace slag, 4.5-7% of limestone and 0.005-0.2% of cement grinding aid. The preparation method comprises the following steps: proportioning, warehousing, batching, sending the proportioned materkals into a mill, milling, dropwisely adding the grinding aid, loading in bulk and packaging. By using the grinding aid, the doping amount of granulated blast furnace slag in the cement is enhanced on the premise of ensuring the quality of normal cement unchanged, thereby preparing excellent normal cement with excellent properties. The invention saves the cement clinker resources, comprehensively utilizes the granulated blast furnace slag, reduces the emissions of dust, CO2, SO3 and NOx, achieves the goals of comprehensive resource utilization, energy saving and emission reduction, lowers the production cost of normal cement and increases the benefits.

Description

technical field [0001] The invention belongs to the technical field of cement production, and in particular relates to a high-volume blast furnace slag cement and a preparation method thereof, in particular to increase the mixing amount of granulated blast-furnace slag in cement by using cement grinding aids to produce high-quality high-volume cement Measure blast furnace slag cement. Background technique [0002] Granulated blast furnace slag (hereinafter referred to as slag) is a by-product of iron and steel smelting in iron and steel plants. According to incomplete statistics, for every ton of pig iron produced, 0.3 to 1 ton of slag is discharged, and the annual slag discharge of my country's iron and steel plants is as high as 60 million tons. The discharge and accumulation of these slags not only consume a lot of manpower, material and financial resources, but also occupy a large amount of land, causing great pressure on the environment. Therefore, the reasonable and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/153C04B7/36C04B7/52
CPCY02P40/10Y02P40/121
Inventor 邓玉莲杨茂鑫朱运锋陆金海覃金英陈柳峰江英闭振升赖广辉邓志业
Owner GUANGXI YUFENG CEMENT
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