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Tailings-based filling cement produced by fine-grained tailings replacing part of fly ash

A technology for replacing parts and binders, applied in cement production and other directions, can solve the problems of increasing and rising costs of binders, achieve good economic and social benefits, solve supply shortages, widely applicable significance and promotion value effect.

Active Publication Date: 2016-03-30
安徽省金德威新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the source of fly ash, the price of fly ash has gradually increased. Taking western Anhui as an example, the factory price of fly ash has reached as high as 130~150 yuan / ton. Therefore, the cost of cement produced by using this formula and process is increasing day by day.

Method used

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  • Tailings-based filling cement produced by fine-grained tailings replacing part of fly ash
  • Tailings-based filling cement produced by fine-grained tailings replacing part of fly ash
  • Tailings-based filling cement produced by fine-grained tailings replacing part of fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of fly ash-based cement, the ratio of raw materials is shown in Table 7

[0039] Table 7

[0040]

[0041] The filling cement is prepared by the following steps,

[0042] 1. Grind clinker, slag and gypsum together, the grinding time is 50 minutes, and the fineness is controlled at a specific surface area ≥ 380m 2 / Kg;

[0043] 2. Grind the fly ash and powder activator together, the grinding time is 30 minutes, and the fineness is controlled at a specific surface area ≥ 450m 2 / Kg;

[0044] 3. Evenly mix the separately ground materials and liquid activator.

Embodiment 2

[0046] Preparation of tailings-based cement, the ratio of raw materials is shown in Table 8

[0047] Table 8

[0048]

[0049] The filling cement is prepared by the following steps,

[0050] 1. Dry the tailings through a drying oven in advance, and the moisture after drying is ≤1.0%;

[0051] 2. Grinding clinker, slag and gypsum together, the grinding time is 50 minutes, and the fineness is controlled at a specific surface area ≥ 380m 2 / Kg;

[0052] 3. Tailings, fly ash and powder activator are ground together, the grinding time is 30 minutes, and the fineness is controlled at a specific surface area ≥ 450m 2 / Kg;

[0053] 4. Mix the separately ground materials and liquid activator evenly.

Embodiment 3

[0055] Preparation of tailings-based cement, the ratio of raw materials is shown in Table 9

[0056] Table 9

[0057]

[0058] The filling cement is prepared by the following steps,

[0059] 1. Dry the tailings through a drying oven in advance, and the moisture after drying is ≤1.0%;

[0060] 2. Grinding clinker, slag and gypsum together, the grinding time is 50 minutes, and the fineness is controlled at a specific surface area ≥ 380m 2 / Kg;

[0061] 3. Tailings, fly ash and powder activator are ground together, the grinding time is 30 minutes, and the fineness is controlled at a specific surface area ≥ 450m 2 / Kg;

[0062] 4. Mix the separately ground materials and liquid activator evenly.

[0063] one. Detection Indicator

[0064] ① Fineness, the main detection of specific surface area;

[0065] ②Age strength: 3-day and 28-day compressive strength of standard sand and tailings;

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Abstract

A tailing base filling cement produced by fine grade tailings replacing part of fly ash relates to the technical field of mining fillers. The filling cement is composed of the tailings, the fly ash, slag, clinker, gypsum and an activator. The filling cement not only solves supply problems of the fly ash, but also recycles the fine grade tailings, is a novel mine filler, has wide applicable significance and popularization value, and is quite good in economic benefit and social benefit.

Description

technical field [0001] The invention relates to the technical field of filling materials for mining, in particular to a production method for producing a tailings-based filling cement by replacing part of fly ash with fine-grained tailings. Background technique [0002] The mining industry is the cornerstone for human beings to enter a civilized society, and an important material basis for the development of the national economy and high-tech industries. In the process of realizing industrialization and building a well-off society, the status of the mining industry has become more prominent both from the perspective of ensuring sustainable supply of raw materials and from the perspective of energy conservation and emission reduction. Since the beginning of the 21st century, the upsurge of industrialization in some developing countries such as China and India has greatly stimulated the surge in metal market demand and mining investment. The merger and reorganization of intern...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/26
CPCY02P40/10
Inventor 牛忠育陈贤树孙建新孙希乐姜家宝姚佳祥
Owner 安徽省金德威新材料有限公司
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