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Preparation of ductility cement product by utilizing lead zinc tail mineral powder

A technology of cement products and tailings powder, which is applied in the field of environment and building materials, and achieves the effects of simple operation process, improved brittleness and wide application range

Active Publication Date: 2015-07-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] After searching, there is no method of using lead-zinc tailings powder to prepare ductile cement products at home and abroad. This project is the first technology researched and invented at home and abroad.

Method used

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  • Preparation of ductility cement product by utilizing lead zinc tail mineral powder
  • Preparation of ductility cement product by utilizing lead zinc tail mineral powder
  • Preparation of ductility cement product by utilizing lead zinc tail mineral powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The weight ratio of the raw material formula: cement clinker 60wt%, lead-zinc tailings 30wt%, gypsum 10wt%, weigh the three raw materials according to the formula, and pour them into the same ball mill tank for ball milling for 2 hours to obtain a well-mixed mixture And pass through a 300 mesh sieve, add the screened mixture to deionized water with 10% of the total mass of raw materials, stir for 30 minutes to obtain a plastic mixture, put the obtained plastic mixture into a mold, and press it into segments, then at temperature It is cured at 20~25°C to obtain ductile cement products.

[0028] Test its compressive strength at different ages according to GB1 / 7671-1999 "Cement Mortar Strength Test Method (ISO)", and test according to GB / T1346-2001 "Cement Standard Consistency Water Consumption, Setting Time, Stability Test Method" The results of the setting time of the ductile cement products are shown in Table 1-1. According to the solid waste leaching toxicity test met...

Embodiment 2

[0034] The weight ratio of the raw material formula: cement clinker 59wt%, lead-zinc tailings 31wt%, gypsum 10wt%, weigh the three raw materials according to the formula, and pour them into the same ball mill tank for ball milling for 2 hours to obtain a well-mixed mixture And pass through a 300 mesh sieve, add the screened mixture to deionized water with 10% of the total mass of raw materials, stir for 30 minutes to obtain a plastic mixture, put the obtained plastic mixture into a mold, and press it into segments, then at temperature It is cured at 20~25°C to obtain ductile cement products.

[0035]Test its compressive strength at different ages according to GB1 / 7671-1999 "Cement Mortar Strength Test Method (ISO)", and test according to GB / T1346-2001 "Cement Standard Consistency Water Consumption, Setting Time, Stability Test Method" The results of the setting time of the ductile cement products are shown in Table 2-1. According to the solid waste leaching toxicity test meth...

Embodiment 3

[0041] The weight ratio of the raw material formula: cement clinker 58wt%, lead-zinc tailings 32wt%, gypsum 10wt%, weigh the three raw materials according to the formula, and pour them into the same ball mill tank for ball milling for 2 hours to obtain a well-mixed mixture And pass through a 300 mesh sieve, add the screened mixture to deionized water with 10% of the total mass of raw materials, stir for 30 minutes to obtain a plastic mixture, put the obtained plastic mixture into a mold and press into segments, and then It is cured at 20~25°C to obtain ductile cement products.

[0042] Test its compressive strength at different ages according to GB1 / 7671-1999 "Cement Mortar Strength Test Method (ISO)", and test according to GB / T1346-2001 "Cement Standard Consistency Water Consumption, Setting Time, Stability Test Method" The results of the setting time of the ductile cement products are shown in Table 3-1. According to the solid waste leaching toxicity test method (HJ / T 299-2...

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Abstract

The invention provides a method for preparing a ductility cement product by utilizing lead zinc tail mineral powder. The method comprises the following steps: by using lead zinc tail mineral powder, cement clinker and gypsum as raw materials; adding the three raw materials into a ball milling tank, and performing ball milling and uniformly mixing; uniformly mixing and stirring a mixture and water; compacting the obtained plasticity mixture into sections; and conserving at a certain temperature to obtain the ductility cement product. The ductility cement product prepared by using the method has the advantages that the fragility is greatly improved, the toughness is improved, the strong plasticity is achieved, and the application range is relatively wide. The preparation method is simple and feasible, and has a good economic benefit and good application prospect; moreover, the pollution to ecological environment by the tailings can be alleviated.

Description

technical field [0001] The invention belongs to the field of environment and building materials, relates to the application of solid waste and the improvement of the performance of cement products, in particular to a method for preparing ductile cement products by using lead-zinc tailings powder. Background technique [0002] Lead-zinc tailings powder is the powdery or fine sandy waste slag discharged from the lead-zinc mine factory after flotation beneficiation, which accounts for 95% of the lead-zinc tailings output, and a large amount of tailings stacking not only takes up a lot of land, It consumes a lot of storage and management costs. At the same time, harmful substances in the tailings, especially heavy metal ions, will be released and migrated after weathering and rainwater leaching, which will have a serious impact and threat on the surrounding ecological environment and people's lives. Lead-zinc tailings powder has certain plasticity, which contains CaO, SiO 2 , F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/12
CPCY02W30/91
Inventor 于岩李冲何健李恩
Owner FUZHOU UNIV
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