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A kind of early-strength water reducer for mine filling material and preparation method thereof

An early-strength water reducer and mine filling technology, applied in the direction of material inspection products, etc., can solve the problems of complex tailings components, insufficient early strength, poor transportation performance, etc., achieve significant economic and environmental double benefits, and reduce cement consumption , good water solubility

Inactive Publication Date: 2016-01-06
CHINA MINMETALS CHANGSHA MINING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The tailings in the filling body account for the vast majority of the mass ratio, and the composition of the tailings is relatively complex, so that the existing early-strength superplasticizer products are mixed into the filling body to cause bleeding and segregation, insufficient early strength, and poor transportation performance. series of questions

Method used

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  • A kind of early-strength water reducer for mine filling material and preparation method thereof
  • A kind of early-strength water reducer for mine filling material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare the early-strength water-reducer of the present invention according to Table 1. Its preparation method is:

[0022] (1) Put 9g of urea, 45g of melamine, 115g of formaldehyde (37%), 18g of phenol, and 9g of sodium dodecylsulfonate into a glass reactor, and stir evenly.

[0023] (2) Start heating. When the temperature in the kettle reaches 70°C, add 3g of sodium hydroxide to adjust the pH to 8.5, and react for 50 minutes. The experimental phenomenon is a colorless transparent liquid.

[0024] (3) Add 45g of sodium sulfite, 43g of sodium metabisulfite and 200g of water, the reaction liquid immediately turns milky white, adjust the pH to 10 with 2g of sodium hydroxide, raise the temperature to 80°C, and react for 100 minutes, the liquid turns white and turbid.

[0025] (4) Cool down to 50°C, then adjust the pH value to 4.5 with 5g of concentrated sulfuric acid, and react for 100 minutes.

[0026] (5) Raise the temperature to 85°C, add 2g of sodium hydroxide to adj...

Embodiment 2

[0030] Prepare the early-strength superplasticizer of the present invention according to Table 2. Its preparation method is:

[0031] (1) Put 6g of urea, 40g of melamine, 100g of formaldehyde (37%), 14g of phenol, and 7g of sodium dodecylsulfonate into a glass reactor, and stir evenly.

[0032] (2) Start heating. When the temperature in the kettle reaches 68°C, add 3g of sodium hydroxide to adjust the pH=8.1, and react for 60 minutes. The experimental phenomenon is a colorless transparent liquid.

[0033] (3) Add 40g of sodium sulfite, 39g of sodium metabisulfite and 150g of water, the reaction liquid immediately turns milky white, adjust the pH to 9.5 with 2g of sodium hydroxide, raise the temperature to 80°C, and react for 100 minutes, the liquid turns white and turbid.

[0034] (4) Cool down to 40°C, then adjust the pH value to 4.9 with 4g of concentrated sulfuric acid, and react for 100 minutes.

[0035] (5) Raise the temperature to 85°C, add 1g of sodium hydroxide to ad...

Embodiment 3

[0039] Prepare the early-strength water-reducer of the present invention according to Table 3. Its preparation method is:

[0040] (1) Put 7.5g of urea, 42.5g of melamine, 107.5g of formaldehyde (37%), 16g of phenol, and 8g of sodium dodecylsulfonate into a glass reactor, and stir evenly.

[0041] (2) Start heating. When the temperature in the kettle reaches 70°C, add 3g of sodium hydroxide to adjust the pH to 8.9, and react for 40 minutes. The experimental phenomenon is a colorless transparent liquid.

[0042] (3) Add 42.5g of sodium sulfite, 41g of sodium metabisulfite and 175g of water, the reaction liquid immediately turns milky white, adjust the pH to 10.5 with 2g of sodium hydroxide, raise the temperature to 85°C, and react for 80 minutes, the liquid turns white and turbid.

[0043] (4) Cool down to 50°C, then adjust the pH value to 4.5 with 5.5g of concentrated sulfuric acid, and react for 80 minutes.

[0044] (5) Raise the temperature to 90°C, add 2.5g of sodium hydr...

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Abstract

The invention relates to an early-strength water reducing agent for a mine filling material and a preparation method of the early-strength water reducing agent. The early-strength water reducing agent is prepared from the following components in parts by weight: 6-9 parts of urea, 40-45 parts of melamine, 100-115 parts of formaldehyde, 14-18 parts of phenol, 40-45 parts of sodium sulfite, 39-43 parts of sodium metabisulfite, 150-200 parts of water, 6-7.5 parts of sodium hydroxide, 4-7 parts of concentrated sulfuric acid and 7-9 parts of sodium dodecyl sulfonate. The early-strength water reducing agent is capable of reducing the consumption of cement and the cost, changing the collapsbillity and improving the liquidity and the early strength of test blocks.

Description

technical field [0001] The invention relates to a new type of admixture in mine filling materials, in particular to an early-strength water reducer used for filling mining materials during filling mining and a preparation method thereof. Background technique [0002] Most of the aggregates used in cemented mine filling are mine solid waste, among which waste rock and tailings are the most common. The main components of this mine solid waste cemented filling are tailing sand or waste rock, cement or other cement and water, and different combinations of these three components will obtain different strength indicators. The amount of cement is the key component that restricts the strength of the filling body, and the amount of cement is the main cost component. Therefore, the consumption of cement should be reduced as much as possible under the premise of meeting the strength requirements. At the same time, the amount of water has an impact on the strength, fluidity, transport...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16G01N33/38
Inventor 周爱民宋嘉栋袁雪梅宋兴王长军张友轩欧任泽柳小胜
Owner CHINA MINMETALS CHANGSHA MINING RES INST