Polymeric calcium aluminosilicate coagulant prepared from gold tailings

A technology of polymerizing aluminum silicate and gold tailings, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of improving the recycling rate and benefiting environmental protection

Inactive Publication Date: 2011-02-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of coagulants from gold tailings has not been reported. Therefore, the synthesis of high-efficiency coagulants is a new way for the comprehensive utilization of gold tailings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Get the finely ground gold tailings, soak in mixed acid solution (50% acetic acid+50% hydrochloric acid) for 8 hours and take the filtrate for later use; then soak the remaining residue in 2.5mol / L sodium hydroxide solution and heat to get the filtrate, The pH of the filtrate was adjusted to 2.5. At 40°C, mix and stir the mixed acid filtrate and sodium hydroxide filtrate in proportion, add a certain amount of oxidant, and mature for 7 days to obtain the polymeric aluminum calcium silicate coagulant. The polyaluminum calcium silicate coagulant of the present invention is made of the following raw materials in mass percentage:

[0010] Mixed acid filtrate 50%

[0011] Sodium Hydroxide Filtrate 45%

[0012] Calcium hypochlorite 5%

[0013] Acetic acid, hydrochloric acid, sodium hydroxide, and calcium hypochlorite are all industrial grades, and the polyaluminum calcium silicate coagulant is an industrial grade liquid.

Embodiment 2

[0015] Get the finely ground gold tailings, soak in mixed acid solution (60% acetic acid+40% hydrochloric acid) for 9 hours and take the filtrate for later use; then soak the remaining residue in 2.0mol / L sodium hydroxide solution and heat to get the filtrate, The pH of the filtrate was adjusted to 2.0. At 45°C, mix and stir the mixed acid filtrate and sodium hydroxide filtrate in proportion, add a certain amount of oxidant, and mature for 8 days to obtain the polymeric calcium aluminum silicate coagulant. The polyaluminum calcium silicate coagulant of the present invention is made of the following raw materials in mass percentage:

[0016] Mixed acid filtrate 55%

[0017] Sodium hydroxide filtrate 38%

[0018] Calcium chlorate 7%

[0019] Acetic acid, hydrochloric acid, sodium hydroxide, and calcium chlorate are all industrial grades, and the polyaluminum calcium silicate coagulant is an industrial grade liquid.

Embodiment 3

[0021] Get the finely ground gold tailings, soak in mixed acid solution (70% acetic acid+30% hydrochloric acid) for 10h and take the filtrate for later use; then soak the remaining residue in 1.8mol / L sodium hydroxide solution and heat to get the filtrate, The pH of the filtrate was adjusted to 1.8. At 50°C, mix and stir the mixed acid filtrate and sodium hydroxide filtrate in proportion, add a certain amount of oxidant, and mature for 9 days to obtain the polymerized calcium aluminum silicate coagulant. The polyaluminum calcium silicate coagulant of the present invention is made of the following raw materials in mass percentage:

[0022] Mixed acid filtrate 60%

[0023] Sodium Hydroxide Filtrate 30%

[0024] Calcium Perchlorate 10%

[0025] Acetic acid, hydrochloric acid, sodium hydroxide, and calcium perchlorate are all industrial grades, and the polyaluminum calcium silicate coagulant is an industrial grade liquid.

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Abstract

The invention belongs to the technical field of environmental protection, and relates to an environment-friendly polymeric coagulant. The polymeric calcium aluminosilicate coagulant comprises the following raw materials in percentage by mass: 50 to 60 percent of filtrate of gold tailings processed by mixed acid, 30 to 45 percent of filtrate of the gold tailings processed by sodium hydroxide and 5 to 10 percent of oxidizing agent. Because the calcium aluminosilicate coagulant is prepared from the gold tailings serving as a main raw material, the repeated utilization factor of the nonrenewable resource can be improved, the tailings can be changed into things of value, and the active ingredients of the gold tailings are fully utilized. Meanwhile, the preparation process of the coagulant accords with the nationally advocated pollution-free production idea, secondary pollution is not produced while the waste resource is effectively utilized, and the coagulant is favorable for environmental protection and meets the policy of national energy conservation and emission reduction.

Description

technical field [0001] The patent of the invention belongs to the field of environmental protection technology, and specifically relates to the preparation of polycalcium aluminum silicate coagulant by using gold tailings as raw materials. Background technique [0002] Gold tailings are ore wastes discharged after gold beneficiation extracts gold concentrate. Gold tailings are mainly composed of SiO 2 , CaO, Al 2 o 3 and a certain amount of Fe 2 o 3 , MgO and other oxides. Tailings have become an important factor that restricts the sustainable development of mines and endangers the ecological environment of mining areas and surrounding areas. Today, when resources are depleted and environmental awareness is increasing, it is an inevitable choice for the sustainable development of mines to develop a variety of comprehensive utilization methods for gold tailings. [0003] At present, the comprehensive utilization of gold tailings mainly includes two aspects: one is recy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 于衍真谭娟冯岩赵友恒刘振亮李满屯
Owner UNIV OF JINAN
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