The solid powder discarded after gold ore is recovered from gold and other useful components through beneficiation or gold extraction process is called gold mine tailings. In recent years, with the expansion of the scale of gold mining in my country, the discharge of gold tailings has also increased day by day, which has become a heavy burden on enterprises and society. Investing huge sums of money to rent farmland, using methods such as landfilling or letting it flow into rivers and seas is bound to destroy fertile land and seriously pollute water resources. Turning waste into treasure is the only completely feasible and effective way.

Low-temperature ceramic composite material is a new type of cementitious material different from traditional cement made of industrial waste residue containing “aluminosilicate” as the main raw material and alkali as the activator. It has been developed in the world in recent years. A representative new technology for the utilization of industrial waste residues. In the course of its development, domestic and foreign scholars have given it a number of names according to the characteristics of this type of material, such as chemically bonded ceramics (CBC for short), geopolymer cement, mineral polymer, solid stone, geopolymer, alkali excitation Slag cement, soil curing agent, etc. Because it has the characteristics of high polymer, ceramics and cement, it shows the advantages of fast hardening, high strength, high temperature resistance, heat insulation, corrosion resistance, adsorption of harmful poisons, etc. Because of its wide source of raw materials, simple preparation process and low energy consumption , which is considered as a typical green environmental material.

At present, the traditional method and practice is to invest a lot of material and financial resources, continue to consume energy and pollute, invest huge amounts of money to rent farmland, and landfill the gold tailings. This method is bound to destroy the fertile land and seriously pollute the water resources. Serious damage to the ecological environment.

Main properties and advantages of unburned ceramsite for gold tailings
1. Green and safe without harmful substances
Harmful components such as cyanide, heavy metal ions, etc. in the unburned ceramsite products of gold tailings participate in the formation of the CBC network structure, and are finally firmly fixed in the network dominated by silicon-aluminum long chains, so that the use of the final product is green and safe;

2. Excellent performance and good durability
The structure of the final product of gold tailings non-fired ceramsite is a composite system composed of dioxygen trioxide, silicon dioxide and low temperature ceramic body, which significantly improves the mechanical properties of gold tailings building materials, improves dry shrinkage, freeze-thaw, Softening, anti-corrosion and many other properties make the product performance better, especially the durability performance is better than that of cement products. Because the strength of cement products will shrink in the later stage, the strength of gold tailings artificial light aggregates will continue to rise in the later stage. The durability of gold tailings artificial light aggregate is more than 10 times that of cement products;

3. Heat insulation, heat preservation, sound insulation, energy saving
After the gold tailings unburned ceramsite solidifies, the porosity is large, so the thermal conductivity is small, between 0.24 and 0.38 W/m.K, the heat transfer rate is slow, which is conducive to heat insulation, heat preservation, sound insulation and energy saving;

4. The production cost of non-fired ceramsite for gold tailings is low, and the economic benefits are significant