For the treatment of acid wastewater, lime
will be added while using sulfate process to produce TiO2, then some industrial
waste will be generated and that is titanium gypsum, a major industrial waste
in the production of TiO2. To tackle the emission of titanium gypsum, it not
only takes enterprises a lot of land and fund, but also brings serious
environmental pollution.
Source: Baidu
Recently, through the production of new
type sintering property blocks, Henan Billions successfully utilized the
titanium gypsum and became the first TiO2 company in China to realize
comprehensive utilization of titanium gypsum.
In 2014, the output of TiO2 was over 2
million tonnes, and most of them were produced under the sulfate process. In
producing one tonne of TiO2, approximately 4 tonnes of titanium gypsum will be
generated. Therefore the total emission of titanium gypsum in this year were
more than 8 million tonnes and with the development of China's TiO2 industry,
this figure is believed to grow steadily. At present, the cost of processing,
storing and transporting titanium gypsum generated by one tonne of TiO2 is
USD39.11 (RMB240). Calculated in this way, it took enterprises over USD78
million to deal with all the titanium gypsum in 2014 in China which shows that
China's titanium gypsum is an enormous untapped market.
However, limited by huge investment,
barriers caused by processing technology and the unpredictability of future
market, most Chinese domestic TiO2 enterprises are maintaining exploratory
attitude towards comprehensive utilization of titanium gypsum and do not invest
substantial money to explore it. Yet it is foreseeable that once the titanium
gypsum project carried out by Henan Billions Chemical Co., Ltd. (Henan
Billions) achieved good economic benefits, it will set off an upsurge in
China's TiO2 industry to comprehensively utilize titanium gypsum.
According to official reports from Henan
Billions, its technology is mainly introduced from Italy and Japan and only the
equipment has cost the company USD19.55 million (RMB120 million). In April
2013, Henan Billions started to build the 200 million piece per year titanium
gypsum sintering property blocks project to produce standard bricks, sintering
property blocks and other wall materials. This project was completed on 20
Sept., 2014. After the project was put into full production, the daily
consumption of titanium gypsum reaches 1,000 tonnes. It was expected that this
investment can help Henan Billions to achieve a revenue and a total profit of
USD11.41 million (RMB 70 million) and USD3.10 million (RMB19 million)
respectively annually. With the titanium gypsum consumption of 360 thousand
tonnes a year, the comprehensive utilization of titanium gypsum can bring about
double harvest in both economy and environmental protection.
It is understood by CCM that in current
China, Sichuan Lomon Titanium Co., Ltd., Wuhan Fangyuan Titanium Dioxide Co.,
Ltd. and other companies have speeded their comprehensive utilization project
of titanium gypsum, but the specific progress is still unknown.
In addition, due to the declining natural
gypsum resources in domestic China, titanium gypsum, dehydrated to 80% solid,
has successfully substituted the natural gypsum and entered the cement retarder
market.
However, subject to the high cost in
processing, this technology does not have a good application. Yet Shanghai Pengbo
Titanium Dioxide Co., Ltd. and Nanjing Titanium Dioxide Chemical Co., Ltd. have
long been engaging in their research on titanium gypsum being used as cement
retarder.
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Tag: Henan Billions, TiO2