外文翻译---用后耐火材料的再生利用 本文关键词：外文，耐火材料，再生，利用，翻译
外文翻译---用后耐火材料的再生利用 本文简介：外文资料翻译ReuseandReproductionofUsedRefractoriesThepaperanalyzedtherecycleconditionanddevelopingtrendofusedrefractoriesinChinaandothercountries,includingr
外文翻译---用后耐火材料的再生利用 本文内容：
外文资料翻译
Reuse
and
Reproduction
of
Used
Refractories
The
paper
analyzed
the
recycle
condition
and
developing
trend
of
used
refractories
in
China
and
other
countries,including
research
achievement
of
recycles
of
used
refractories
such
as
MgO-C
bricks,Al2O3-MgO-C
bricks,Al2O3-SiC-C
castable
and
MgO-Cr2O3
bricks.
Recycled
refractory
exhibit
the
same
or
even
better
properties
compared
with
the
original.
In
addition,prospects
for
recycle
of
used
refractories
are
also
discussed.
1
Introduction
About
9
millions
tons
of
refractories
are
consumed
in
China
annually
owing
to
the
rapid
development
of
the
metallurgical
industry,from
which
more
than
4
million
tons
of
used
refract
ories
are
inevitably
generated.Most
of
used
refractories
are
obsolescence,and
only
aminority
is
recycled
as
rawmaterials
for
refractory
products.
Discard
of
used
refracto
ries
not
only
is
lavish
the
natural
resources
but
also
is
harmful
to
the
environment
Pollution
of
used
refractories
include
following
as
pects
of:
1)
dust;
2)
an
thraco
silicosis
caused
by
crystalline
silica
dust;
3)
radioactivity
of
zirconia
rawmaterial;
4)
carcinogenity
of
Cr+
6;
5)
carcinogenicity
of
refractory
fiber
and
asbestos;
6)
pollutant
from
volatile
and
the
rmal
decomposed
substance
of
pitch
and
resin.
Used
refractories
can
be
even
processed
into
rawmaterials
with
high
price,performing
as
high–quality
second
resources.
Not
only
saving
mineral
resources
and
energy
and
reducing
the
environmental
pollution,but
also
saving
the
cost
of
refractory
and
steelmaking,recycle
of
used
refractories
becomes
an
important
cause
to
refractory
enter
prises.
2
Circum
stances
for
used
refractories
in
China
Baosteel
pays
great
attention
to
reuse
and
reproduction
of
used
refractories.
Combine
reuse
and
reproduction
of
used
refractories
with
cutting
down
cost
and
increasing
benefit,protecting
environment
and
advancing
enter
prise
level.
Accelerate
research
and
development
on
used
refractories.
The
research
results
are
reported
as
follows:
Used
MgO-C
bricks
for
BOF
and
LF
lining
are
selected
to
remove
sundries
such
as
dirt,slag
and
iron
scraps,which
decrease
seriously
the
quality
of
reproduced
refractories.
Properties
of
MgO-C
brick
reproduced
are
shown
in
table
1.
Tab.1
Properties
of
MgO-C
brick
reproduced
at
R
but
R&D
has
been
carried
out.
Pattern
of
reuse
and
repoducing
on
used
refractories
is
diversification,i.
e.
consumer
uses
directly,refractories
plant
reclaimes,building
professional
plant
reclaiming
used
refractories
and
they
unite.
The
key
t
o
success
is
developing
and
researching
high
technology
on
reuse
and
reproduction
of
used
refractories.
Reuse
and
reproduction
of
used
refractories
is
also
a
contribution
on
environment
protection,and
so,reuse
and
reproduction
of
used
refractories
increases
rapidly.
Trend
of
zero
discard
has
been
indicated.
用后耐火材料的再生利用
综述了国内外对用后耐火材料的再利用情况和发展趋势，报导了宝钢对用后镁碳砖、铝镁碳砖、铁沟料和镁铬砖等的再利用研究成果。再生耐火材料的性能接近或达到新产品的水平，甚至有些能达到优质耐火材料的水平。扼要介绍了用后耐火材料再生利用的设想。
1
简介
大约九百万吨的耐火材料消耗在中国每年快速发展的冶金行业，而不可避免的产生大约四百万吨的废旧耐火材料，而只有一少部分是作为耐火材料的原材料循环利用的。用后耐火材料的摒弃不仅是国家自然资源的巨大浪费,而且也是对环境的污染,不能用的耐火材料危害包括以下的几种：1）垃圾；2）产生的二氧化硅粉尘引起尘肺病；3）产生放射性的氧化锆原料；4）产生毒害性的铬离子；5）耐火纤维制品、石棉致癌性物质；6）从已分解的沥青树脂产生挥发性和热能的污染。用后的耐火材料能被加工成原材料，或者制成新的耐火资源，这样不但能节约能源、矿产资源和降低环境污染，而且节约耐火材料和炼钢的成本，这是镁钙系耐火材料循环使用的重要原因。
2
用后耐火材料在中国的现状
宝钢注重用后耐火材料的循环再生利用，他们使用用后的耐火材料，这样可以降低成本、提高效益、保护环境和推进事业水平。因此必须加快研发用后耐火材料的生产技术，研究的结果如下：
使用MgO-C砖时必须清除BOF和LF炉内的夹杂物，如灰尘、夹渣、钢铁残渣，因为这些物质会大大降低镁钙系耐火材料的质量。MgO-C砖的再生性能如表1。
表1
宝钢研发的再生MgO-C砖的性能
MgO
80
76
80
77
C
12
14
11
14
抗冷冲的强度/M
Pa
60
52
60
52
体积密度/
(g
·
cm-
3)
3.04
3.01
3.08
3.04
显气孔率/%
3
2
3
2
热震稳定性/M
Pa
13
12
13
12
加用后镁碳砖的比例/%
97
97
80
80
使用再生的镁碳砖的三百吨的钢包渣线的寿命从二十炉延长到八十二炉，原来的乍现的损耗速度的是1.40mm每热量，二用再生的镁碳砖的损耗速度是1.28mm每热量，因此再生镁碳砖的达到了原来的性能。
表2
再生镁铬砖的性能
MgO
60
Cr
2O3
18
180℃,24h
体积密度/
(
g
·
cm-
3)
3.12
显气孔率/%
13
抗冷冲压力/M
Pa
64.3
1750℃,3h
体积密度/
(
g
·
cm-
3)
3.14
显气孔率/%
17.7
抗冷冲压力/M
Pa
48.7
加入用后镁铬砖的比例
/%
>70
宝钢研制的用镁铬生产RH砖已经超过十年，RH砖中混合掺入20%的镁铬砖，并且取得了良好的效果，再生镁铬砖的研究也是最近的研究方向，实验结果显示在表2，我们已经研究了AMC砖和ASC可铸浇注料，并且AMC砖用在了钢包，ASC砖用在了钢包浇注系统。
3
前景
用后耐火材料的再利用可以降低原材料的成本和降低冶金工业耐火材料的辅助材料。目前宝钢的用后耐火材料的再利用率还很低，但在研发如何提高利用率，用后耐火材料的循环利用是多样化的，厂家可以直接用废旧的耐火材料生产新的产品，建筑工程也可以用废旧的耐火材料，而成功的关键是研发、研制高新技术是用后耐火材料可以重新，用后耐火材料的循环再生利用也是对环境保护的巨大贡献，提高耐火材料的循环再生利用的利用也是急需解决的，并且零排放也是当前的发展趋势。