On June 28th, Penglai City Jinye Nano Materials Co., Ltd., the high-tech project of “gold smelting cyanide tailings denitrification and comprehensive utilization†was officially put into operation, which can make the refractory metallurgical extraction rate reach 99%. To comprehensive utilization, effective recovery of copper , iron , arsenic and other elements, and by-product superfine nano-scale iron oxide red, ammonium sulfate compound fertilizer. Thermal Insulation Bridge Cutoff Profile Thermal Insulation Bridge Cutoff Profile,Architectural Aluminium Profile Wuqiang Xingdou International Trade Co., Ltd , https://www.xdaluminum.com
The research on "Cold smelting tailings for cyanide withdrawal and comprehensive utilization" began in July 2001 and was jointly researched and developed by Penglai City Gold (Group) Corporation Gold Smelter and Tsinghua University, effectively solving the high content. Extraction of refractory metallurgical concentrates containing sulfur and arsenic and comprehensive recovery of cyanide gold tailings. It has successively passed the technical appraisal organized by the academician of the Chinese Academy of Sciences and the technical department of Shandong Science and Technology Department. The new catalytic oxidation technology adopted in the “gold smelting cyanide tailings denitrification and comprehensive utilization†has reached the international advanced level. At present, the technology has applied for the national patent “gold smelting tailings for cyanide tailings and comprehensive utilizationâ€, with independent intellectual property rights.
The biggest advantage of this process is that it not only improves the extraction rate of refractory metallurgy, but also realizes the comprehensive utilization of various valuable elements. The project opens the cyanide gold tailings or the refractory gold concentrate to enclose the mineral shells such as gold and silver pyrite by catalytic oxidation method, so that the wrapped gold and silver are freed, and gold and gold are extracted from the cyanide residue. silver. The copper in the cyanide tailings is extracted by displacement method. The oxidizing solution is extracted from lead , arsenic, silicon and zinc , and the ultrafine nano-scale iron oxide red is extracted from the oxidizing solution by the precipitation and hydrolysis method, and the ammonium sulfate compound fertilizer is produced by-product. The cyanidation tailings are difficult to select gold and silver extraction, valuable metal recovery, and preparation of high-grade iron red. Another key to the project is the complete elimination of serious environmental pollution caused by long-term stacking of cyanide tailings, such as cyanide, sulfur dioxide and heavy metals such as mercury and lead.
The project invested 50 million yuan to build a new catalytic oxidation, oxidant regeneration, iron red generation, iron red drying, ammonium sulfate recovery and steam power equipment. The first design institute of the Ministry of Chemical Industry - China Tianchen Chemical Engineering Company completed the design of the project. Handling 3,000 tons of refractory metallurgical concentrates and gold smelting tailings, producing 2000 kilograms of gold, 3000 kilograms of silver, producing more than 15,000 tons of iron red, producing 30,000 tons of ammonium sulfate per year, and achieving an annual output value of more than 30,000 yuan. The benefits are more than 20 million yuan, and the social benefits are very significant.
Experts and professors who participated in the project appraisal affirmed this high-tech project of Penglai City Gold (Group) Corporation. They believe that the industrialized catalytic oxidation process, the treatment of 1 ton of gold smelting cyanide tailings benefit can only increase the income of more than 1,000 yuan, which is internationally advanced; solves the iron sulfide-coated gold concentrate and high arsenic, high carbon and other gold The problem of difficult processing of concentrate is domestically advanced; the most valuable elements are recycled and reused, especially the ultra-fine transparent iron-based dyes are prepared from the waste residue of the gold smelting industry. This is the first in the world; it solves the gold smelting The tailings slag is stacked in the open air and causes environmental pollution problems. It is internationally advanced.
At the ceremony of the ribbon-cutting ceremony of the completion ceremony, Mu Fanmin, party secretary and general manager of Penglai City Gold (Group) Corporation and chairman of Penglai Jinye Nano Materials Co., Ltd. said at the ceremony that the project is an environmentally-friendly high-tech project. The commissioning of Jinye Nano Project is another major measure for the company to lengthen the gold industry chain. Also attending the ribbon-cutting ceremony were leaders of China Gold Group Corporation, China Gold Association, experts and professors from research institutes such as the Chinese Academy of Sciences and Tsinghua University, and other people from all walks of life.