Recently, the Guangxi Metallurgical Research Institute of Guangxi Nonferrous Metals Group has made significant breakthroughs in the extraction process of yttrium oxide by reforming the technological process and extraction conditions, and is expected to fundamentally solve the problem of waste acid environmental protection in the titanium dioxide industry, with obvious economic benefits and a broad market space.
According to reports, as the country continues to support the new materials industry and the continuous development of emerging industries, the market demand for helium has increased dramatically in recent years. In foreign countries, the recent development has been applied to the manufacture of yttrium aluminum alloy and solid oxide fuel cells, making The demand has increased significantly, but the extraction process of thorium oxide has been subject to improvement.
According to reports, the abundance of earthworms in the natural world is low and highly dispersed, with only 5 grams per ton of crustal material, high costs for separate development and utilization, and integrated recycling can reduce costs. The extraction of dilute waste from the by-product of titanium dioxide production plant The noble metal yttrium oxide is one of the most important sources of raw materials for the present. At present, the oxidation pit extraction technology commonly used at home and abroad is directly used to extract the organic acid from the waste acid to obtain the bismuth oxide. Because the concentration of strontium in the original liquid is not high enough, the extraction cost is relatively high, and it has obviously not met the market needs.
The new process of Guangxi Metallurgical Research Institute has improved the original process: in the process of environmentally friendly treatment of waste acid by adding a cheap reagent, in order to enrich the cerium element in advance, the concentration of cerium after enrichment can be increased by more than 5-6 times. , and then the extraction and separation of hydrazine, to improve the efficiency of wolfberry extraction. At the same time, vanadium can be directly extracted under the condition of titanium, and the extraction conditions of vanadium in titanium white waste acid are optimized, and the comprehensive recovery of titanium dioxide, vanadium pentoxide, etc. is more than 70%, making the extraction cost of thorium greatly reduced. Production creates conditions.
It is understood that there are currently more than 50 titanium dioxide production plants in China, most of which use the ** process, and the acidic wastewater discharged from the production is the main “three wastes†pollution source for titanium dioxide enterprises and has also become a consequent restriction on the titanium dioxide industry. A difficult problem for healthy development. Among them, there are only 15 existing TiO 2 production plants in Guangxi, with an annual output of more than 250,000 tons of titanium dioxide, and annual output of more than 1.25 million cubic meters of waste acid that requires environmental protection. This new process, by adding a small amount of reagents, complexing agents, etc., in addition to recovery of antimony, vanadium pentoxide, titanium dioxide, etc., can also comprehensively recover Fe3+ and SO42-, etc. in waste acids, and by adding lime powder to the neutralization method. By-product gypsum, the treated waste acid basically reaches the environmental protection discharge standard, saves a large amount of environmental protection funds, and can fundamentally solve the problem of waste acid environmental protection of the titanium dioxide plant.
According to reports, if the new process is to be promoted throughout Guangxi, according to the calculation of 1.25 million tons of waste acid per year of titanium dioxide, the recovered waste acid can be recycled for 12.5 tons of antimony oxide products, 500 tons of vanadium pentoxide products and titanium dioxide products. 5000 tons, 44,000 tons of iron products, the output value of 244 million yuan***.
Gypsum, a by-product of treatment, will also produce significant economic benefits. Experiments have shown that the treatment of 1 cubic meter of waste acid will produce 0.4-0.5 tons of by-product gypsum. At present, the capacity of cement enterprises in Guangxi is about 70 million tons per year, which is calculated by the amount of 4% of cement required for one ton of cement. If it is used for cement production, only one item of plaster will generate economic benefits of RMB 1-150 million per year** *.
According to reports, as the country continues to support the new materials industry and the continuous development of emerging industries, the market demand for helium has increased dramatically in recent years. In foreign countries, the recent development has been applied to the manufacture of yttrium aluminum alloy and solid oxide fuel cells, making The demand has increased significantly, but the extraction process of thorium oxide has been subject to improvement.
According to reports, the abundance of earthworms in the natural world is low and highly dispersed, with only 5 grams per ton of crustal material, high costs for separate development and utilization, and integrated recycling can reduce costs. The extraction of dilute waste from the by-product of titanium dioxide production plant The noble metal yttrium oxide is one of the most important sources of raw materials for the present. At present, the oxidation pit extraction technology commonly used at home and abroad is directly used to extract the organic acid from the waste acid to obtain the bismuth oxide. Because the concentration of strontium in the original liquid is not high enough, the extraction cost is relatively high, and it has obviously not met the market needs.
The new process of Guangxi Metallurgical Research Institute has improved the original process: in the process of environmentally friendly treatment of waste acid by adding a cheap reagent, in order to enrich the cerium element in advance, the concentration of cerium after enrichment can be increased by more than 5-6 times. , and then the extraction and separation of hydrazine, to improve the efficiency of wolfberry extraction. At the same time, vanadium can be directly extracted under the condition of titanium, and the extraction conditions of vanadium in titanium white waste acid are optimized, and the comprehensive recovery of titanium dioxide, vanadium pentoxide, etc. is more than 70%, making the extraction cost of thorium greatly reduced. Production creates conditions.
It is understood that there are currently more than 50 titanium dioxide production plants in China, most of which use the ** process, and the acidic wastewater discharged from the production is the main “three wastes†pollution source for titanium dioxide enterprises and has also become a consequent restriction on the titanium dioxide industry. A difficult problem for healthy development. Among them, there are only 15 existing TiO 2 production plants in Guangxi, with an annual output of more than 250,000 tons of titanium dioxide, and annual output of more than 1.25 million cubic meters of waste acid that requires environmental protection. This new process, by adding a small amount of reagents, complexing agents, etc., in addition to recovery of antimony, vanadium pentoxide, titanium dioxide, etc., can also comprehensively recover Fe3+ and SO42-, etc. in waste acids, and by adding lime powder to the neutralization method. By-product gypsum, the treated waste acid basically reaches the environmental protection discharge standard, saves a large amount of environmental protection funds, and can fundamentally solve the problem of waste acid environmental protection of the titanium dioxide plant.
According to reports, if the new process is to be promoted throughout Guangxi, according to the calculation of 1.25 million tons of waste acid per year of titanium dioxide, the recovered waste acid can be recycled for 12.5 tons of antimony oxide products, 500 tons of vanadium pentoxide products and titanium dioxide products. 5000 tons, 44,000 tons of iron products, the output value of 244 million yuan***.
Gypsum, a by-product of treatment, will also produce significant economic benefits. Experiments have shown that the treatment of 1 cubic meter of waste acid will produce 0.4-0.5 tons of by-product gypsum. At present, the capacity of cement enterprises in Guangxi is about 70 million tons per year, which is calculated by the amount of 4% of cement required for one ton of cement. If it is used for cement production, only one item of plaster will generate economic benefits of RMB 1-150 million per year** *.
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