Method for preparing ordinary portland cement by taking gold mine tailings as raw materials

A technology for ordinary Portland cement and gold mine tailings, applied in the field of building materials, can solve the problems of poor activity, restricting industrial application, reducing cement strength, etc., and achieve the effects of compact structure, low price and stable performance

Inactive Publication Date: 2012-06-27
安徽乌江水泥有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the current public reports, there are few studies on the use of gold tailings as admixtures in cement preparation. The main reason is that its activity is p...

Method used

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  • Method for preparing ordinary portland cement by taking gold mine tailings as raw materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The mass ratio of raw material powder is w (cement clinker): w (gypsum): w (gold tailings): w (activator) = 55: 4: 34: 7; Mix evenly and grind finely, and mix cement clinker and gypsum according to a certain proportion, mix uniformly and grind finely, the fineness is less than 5% after passing through the 80μm sieve, and then mix the four kinds of materials evenly after grinding. The prepared Portland cement has an initial setting time of 2 hours and 25 minutes, a final setting time of 4 hours and 10 minutes, a three-day flexural strength of 5.4MPa, a compressive strength of 28.7MPa, and a 28-day flexural strength The strength is 7.8MPa, the compressive strength is 45.8MPa, the stability is qualified, and it can meet the national standard of No. 42.5 cement. The activator used in the present invention is prepared from liquid A and liquid B, which are prepared separately; liquid A is uniformly prepared by mixing deionized water sodium salt solution, complexing agent, pH ...

Embodiment 2

[0020] The mass ratio of raw material powder is w (cement clinker): w (gypsum): w (gold tailings): w (activator) = 40: 10: 40: 10; Mix evenly and grind finely, and mix cement clinker and gypsum according to a certain proportion, mix uniformly and grind finely, the fineness is less than 5% after passing through the 80μm sieve, and then mix the four kinds of materials evenly after grinding. The prepared Portland cement has an initial setting time of 1 hour and 50 minutes, a final setting time of 3 hours and 50 minutes, a three-day flexural strength of 4.8MPa, a compressive strength of 24.7MPa, and a 28-day flexural strength The strength is 7.2MPa, the compressive strength is 42.8MPa, the stability is qualified, and it can meet the national standard of No. 42.5 cement. The activator used in the present invention is prepared from liquid A and liquid B, which are prepared separately; liquid A is uniformly prepared by mixing deionized water sodium salt solution, complexing agent, pH...

Embodiment 3

[0022] The mass ratio of raw material powder is w (cement clinker): w (gypsum): w (gold tailings): w (activator) = 50: 5: 35: 10; Mix evenly and grind finely, and mix cement clinker and gypsum according to a certain proportion, mix uniformly and grind finely, the fineness is less than 5% after passing through the 80μm sieve, and then mix the four kinds of materials evenly after grinding. The prepared Portland cement has an initial setting time of 2 hours and 10 minutes, a final setting time of 4 hours and 05 minutes, a three-day flexural strength of 5.8MPa, a compressive strength of 27.5MPa, and a 28-day flexural strength The strength is 7.2MPa, the compressive strength is 43.8MPa, the stability is qualified, and it can meet the national standard of No. 42.5 cement. The activator used in the present invention is prepared from liquid A and liquid B, which are prepared separately; liquid A is uniformly prepared by mixing deionized water sodium salt solution, complexing agent, pH...

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Abstract

The invention discloses a method for preparing ordinary portland cement by taking gold mine tailings as raw materials. Cement clinker, gypsum, gold mine tailings and an activating agent are used as the raw materials, and the weight ratio of the cement clinker to the gypsum to the gold mine tailings to the activating agent is (60-95): (1-10): (5-40): (1-10). The concrete preparation method comprises the following steps of: firstly, uniformly mixing the gold mine tailings and the activating agent according to the proportion, then grinding to be fine; proportioning the cement clinker and the gypsum according to the proportion, then, uniformly mixing and grinding to be fine; and uniformly mixing the four raw materials which are ground to be fine to prepare the portland cement. In the method, the gold mine tailings with stable performance and low cost are used as mixed materials of the ordinary portland cement, the activity of the ordinary portland cement is improved by introducing the activating agent or an exciting agent, and the prepared portland cement is compact in structure and excellent in performance. The raw materials selected in the whole preparation process are simple, the characteristics of the gold mine tailings are sufficiently utilized, and portland cement with excellent performance can be synthesized.

Description

technical field [0001] The invention relates to the building material industry, in particular to a method for preparing ordinary Portland cement by using tailings of low-cost gold mines as raw materials. Background technique [0002] Mineral resources are one-time natural resources. With the continuous consumption of natural resources, the comprehensive utilization of tailings is very important. With the expansion of gold development scale and the extension of mining history, gold mine tailings are increasing year by year. The stockpiled tailings not only take up a lot of land, waste a lot of money, but also seriously pollute the environment. There are many kinds of gold deposits in my country, and the large and small deposits are all over the country, which provides a good resource base for the development of gold mining. However, because gold production is restricted by various factors such as industrial policies, technical equipment, dressing and smelting processes, and...

Claims

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Application Information

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IPC IPC(8): C04B7/147
CPCY02P40/143Y02P40/10
Inventor 赵东方陈鼎毛洪亮
Owner 安徽乌江水泥有限公司
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