|
|
RESOURCE UTILIZATION SITUATION OF
PHOSPHOGYPSUM BASED ON MATERIAL FLOW METHOD
#br#
HOU Huimin, GUO Dongfang, SU Lijuan, XU He, et al
Resources & Industries
2022, 24 (6):
23-30.
DOI: 10.13776/j.cnki.resourcesindustries.20221025.001
As
an agricultural giant, China’s surging needs of phosphorous fertilizer to
guarantee its crop security leads to mass of the industrial solid waste
phosphogypsum during production of phosphorous acid and fertilizer, which harms
the environment if dumping in the long term. China began to vigorously promote
the resource utilization of phosphogypsum in 2018, and formulated and issued a
number of encouraging policies. However, the comprehensive utilization rate of
phosphogypsum is still low up to now, and the resource utilization market still
needs to be continuously constructed and improved. In this paper, based on the
problem of unclear production quantity of phosphogypsum in China, the product/waste
coefficient method was used to estimate the output of phosphogypsum in China
from 1957 to 2019 based on the output of phosphogypsum in “China Industrial Statistical Yearbook”, after field investigation and analysis in
Yunnan, Guizhou, Sichuan, Hubei, Anhui and other provinces, Guizhou province,
which has a good comprehensive performance in the utilization of phosphogypsum
resources, was selected as the key research object, the material flow analysis
was carried out, and the material metabolism graph of phosphogypsum resource
utilization was drawn. Temporally,
Guizhou has a rising resource utilization trend of phosphogypsum with a
utilization ratio at 58.80% in 2018 to 107.37% in 2020, marking a start point
for Guizhou uses the historically-dumping phosphogypsum solid waste. As for the
resource utilization means, Guizhou consumes phosphogypsum up to 964.5kt, 360.4kt,
330.9kt and 234.8kt from underground backfilling, acid making and other
chemical utilization, construction materials and cement retardant in the first
quarter of 2021, with a comprehensive use rate up to 55.02%, still at the
preliminary use stage of low added-values and small scale. This paper, based on
site investigation, studies the material metabolism rule of phosphogypsum in
the whole life cycle from production to resource utilization, and reveals the
key issues in its raw materials, technology, products and policies, and from
the perspective of government, enterprises, consumers and other stakeholders,
targeted policy suggestions are put forward, hoping to provide scientific
theoretical basis for the accurate management and resource utilization of
phosphogypsum in China, also provides a scientific reference for controlling
other mass solid wastes under the background of circular economy, zero-waste
cities and carbon reduction.
Reference |
Related Articles |
Metrics
|
|
