CN108373319A - 一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法 - Google Patents
一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法 Download PDFInfo
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
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Abstract
本发明公开了一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法。包括下述步骤:a、将铝矾土生料粉碎至1~60mm,得A品;b、将A品过10mm筛孔筛分,得筛下粉料B品;c、将结合剂喷洒入B品中,并拌匀,得C品;所述的结合剂,是水玻璃和水的混合剂,其中其中水玻璃的含量为20%~45%;d、将C品制成球形,即D品;e、将D品烘干,得E品;f、将E品在1150~1250°下煅烧1.5~2.5h,之后冷却即得。本发明具有生产成本低和资源利用率高的特点。
Description
技术领域
本发明涉及铝矾土熟料的生产方法,特别是一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法。
背景技术
磨料级铝矾土熟料是磨料行业生产棕刚玉的主要原料,传统竖窑或回转窑煅烧的磨料级铝矾土熟料在生产过程中均采用粒径为30mm以上生铝矾土块矿进行生产,但由于铝矾土开采过程中大于30mm的块矿有限,而小于30mm的矿石数量巨大,尤其是软质矿在开采、装卸过程中基本上成细颗粒或粉,而数量巨大又较为廉价的小于30mm的铝矾土生矿均不能用于生产磨料级铝矾土熟料,导致块矿被抢购,原料价格居高不下。
回转窑煅烧磨料级铝矾土熟料时为了确保矿石烧透,块矿还必须经过破碎机破碎成60mm以下的粗料并将0-10mm的筛掉后再入窑煅烧。块矿的价格高,软质矿或粉矿或混合矿虽然价格低、货源广,但客户又不需要超过1%带粉的产品,加上细料(粉)太多,生产粉尘大、煅烧透气性差等,传统的生产方法只能抢购块矿进行生产,并破碎后筛掉0-10mm细料,导致生产成本居高不下,同时铝矾土资源没有得到很好的综合利用!
综上所述,传统的回转窑煅烧磨料级铝矾土熟料,存在原料成本高和资源利用率低的特点。
发明内容
本发明的目的在于,提供一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法。本发明具有生产成本低和资源利用率高的特点。
本发明的技术方案:一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,包括下述步骤:
a、将铝矾土生料粗碎至粒径小于60mm的粗料,得A品;
b、将A品通过8~10mm筛孔筛分,得筛下粉料B品;
c、将结合剂喷洒入B品中,并拌匀,得C品;所述的结合剂加入量为B品重量的4%~8%;所述的结合剂,是水玻璃和水的混合剂,其中水玻璃的含量为20%~45%;
d、将C品制成粒径为8~40mm的球形,即D品;
e、将D品烘干,得E品;
f、将E品在1150~1250°下煅烧1.5~3.5h,之后冷却即得。
前述的利用铝矾土生矿粉制备磨料级铝矾土熟料的方法所述的步骤c中,所述的水玻璃的模数大于2.8,比重大于或等于1.4。
前述的利用铝矾土生矿粉制备磨料级铝矾土熟料的方法所述的步骤c中,所述的水玻璃的含量为40%。
前述的利用铝矾土生矿粉制备磨料级铝矾土熟料的方法所述的步骤f,是将E品在1200°下煅烧2h,之后冷却即得。
前述的利用铝矾土生矿粉制备磨料级铝矾土熟料的方法所述的步骤e中,E品的含水量小于3%。
有益效果
与现有技术相比,本发明具有下述有益效果:
采用本发明的生产方法生产磨料级铝矾土熟料,是采用粒径小于10mm铝矾土生料作为原料进行生产,通过该生产方法,能够放宽原料入厂标准,可以有效利用矾土资源,原材料选择范围更大、货源更充足、原料价格更低,软质矿或粉矿或混合矿均可以生产,相比块矿生产而言还提高了铝矾土矿资源的利用率。
铝矾土块矿的价格通常是同等质量粉矿价格的150%以上;另外生产过程中的收尘粉通常都是低于生矿价格200%以上进行低价外销处理,并且处置过程容易造成大量的二次扬尘污染环境。而本发明进行磨料级铝矾土熟料的制备,采用的是粉状的生矿粉制备,能够在降低成本的同时,还能回收收尘粉(因回收的收尘粉也能够作为磨料级铝矾土熟料的制备原料),不仅降低了原料成本,还避免了收尘粉的二次扬尘污染,更加环保。
本发明的步骤c~d,是将为粒径小于10mm铝矾土生料制成球形的成球工艺,该成球工艺中原料的含水量大,属于湿法生产,因此消除了粉尘的影响,更加环保;同时产品粒度好,深受用户喜爱,有广阔的市场前景。本发明采用的成球工艺形成的球形物料(即D品)质地比块矿均匀,因此本发明的生产方法烧结出的熟料的品质优于块矿烧结得到的熟料。
本发明采用的结合剂,是水玻璃和水的混合剂,其原料成本低、来源广,并且结合剂的用量少(为B品重量的4%~8%),有效降低了生成成本。
本发明采用的水玻璃的模数大于2.8,比重大于或等于1.4,该水玻璃具有较强的粘接性和受热后硬化快、强度高的特点,有效确保了原料成球的质量。同时由于该水玻璃熔点低,高温烧结时,还能有效降低烧结温度。并且该水玻璃的化学成分是硅酸盐,与铝矾土原料的部分化学成分一样,因此,使用水玻璃作为结合剂,不仅能够确保产品品质,还能确保成球时的强度以及,以及在输送到窑烧成带前不会散,同时可提升球体煅烧后的聚合强度,便于储存、运输、使用。
本发明生产的磨料级铝矾土熟料与传统方法生产的相比,具有如下优点:1.形状规则,细料粉料少,装车时扬尘少;2.用户在使用时,可直接使用;具体如表1所示:
具体实施方式
下面结合实施例对本发明作进一步的说明,但并不作为对本发明限制的依据。
实施例1。一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,包括下述步骤:
a、将铝矾土生料粗碎至粒径小于60mm的粗料,得A品;
b、将A品过10mm筛孔筛分,得筛下粉料B品;
c、将结合剂喷洒入B品中,并拌匀,得C品;所述的结合剂加入量为B品重量的6%;所述的结合剂,是水玻璃和水的混合剂,其中水玻璃的含量为40%;
d、将C品制成粒径为30mm的球形,即D品;
e、将D品烘干,得E品;
f、将E品在1200°下煅烧2h,之后冷却即得。
前述的步骤c中,所述的水玻璃的模数大于2.8,比重大于或等于1.4。
前述的步骤e中,E品的含水量小于3%。通过该方法,避免E品水分过大入窑接触高温后容易产生球体炸裂现象。
前述步骤中产生的收尘粉也可用上述c、d、e方法单独生产或混合在B品中生产。以此避免了收尘粉的二次扬尘污染,且实现资源利用的最大化。
实施例2。一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,包括下述步骤:
a、将铝矾土生料粗碎至粒径小于60mm的粗料,得A品;
b、将A品过8mm筛孔筛分,得筛下粉料B品;
c、将结合剂喷洒入B品中,并拌匀,得C品;所述的结合剂加入量为B品重量的4%;所述的结合剂,是水玻璃和水的混合剂,其中水玻璃的含量为20%;
d、将C品制成粒径为8mm的球形,即D品;
e、将D品烘干,得E品;
f、将E品在1150°下煅烧1.5h,之后冷却即得。
前述的步骤c中,所述的水玻璃的模数大于2.8,比重大于或等于1.4。
前述的步骤e中,E品的含水量小于3%。
实施例3。一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,包括下述步骤:
a、将铝矾土生料粗碎至粒径小于60mm的粗料,得A品;
b、将A品过10mm筛孔筛分,得筛下粉料B品;
c、将结合剂喷洒入B品中,并拌匀,得C品;所述的结合剂加入量为B品重量的8%;所述的结合剂,是水玻璃和水的混合剂,其中水玻璃的含量为45%;
d、将C品制成粒径为40mm的球形,即D品;
e、将D品烘干,得E品;
f、将E品在1250°下煅烧3.5h,之后冷却即得。
前述的步骤c中,所述的水玻璃的模数大于2.8,比重大于或等于1.4。
前述的步骤f,是将E品在1200°下煅烧2h,之后冷却即得。
前述的步骤e中,E品的含水量小于3%。
实施例4。一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,包括下述步骤:
a、将铝矾土生料粗碎至粒径小于60mm的粗料,得A品;
b、将A品通过8~10mm筛孔筛分,得筛下粉料B品;
c、将结合剂喷洒入B品中,并拌匀,得C品;所述的结合剂加入量为B品重量的4%~8%;所述的结合剂,是水玻璃和水的混合剂,其中水玻璃的含量为20%~45%;
d、将C品制成粒径为8~40mm的球形,即D品;
e、将D品烘干,得E品;
f、将E品在1150~1250°下煅烧1.5~3.5h,之后冷却即得。
前述的步骤c中,所述的水玻璃的模数大于2.8,比重大于或等于1.4。
前述的步骤c中,所述的水玻璃的含量为40%。
前述的步骤f,是将E品在1200°下煅烧2h,之后冷却即得。
前述的步骤e中,E品的含水量小于3%。
前述的步骤e中,E品的含水量小于3%。通过该方法,避免E品水分过大入窑接触高温后容易产生球体炸裂现象。
前述步骤中产生的收尘粉也可用上述c、d、e方法单独生产或混合在B品中生产。以此避免了收尘粉的二次扬尘污染,且实现资源利用的最大化。
Claims (5)
1.一种利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,其特征在于,包括下述步骤:
a、将铝矾土生料粗碎至粒径小于60mm的粗料,得A品;
b、将A品通过8~10mm筛孔筛分,得筛下粉料B品;
c、将结合剂喷洒入B品中,并拌匀,得C品;所述的结合剂加入量为B品重量的4%~8%;所述的结合剂,是水玻璃和水的混合剂,其中水玻璃的含量为20%~45%;
d、将C品制成粒径为8~40mm的球形,即D品;
e、将D品烘干,得E品;
f、将E品在1150~1250°下煅烧1.5~3.5h,之后冷却即得。
2.根据权利要求1所述的利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,其特征在于,步骤c中,所述的水玻璃的模数大于2.8,比重大于或等于1.4。
3.根据权利要求1或2所述的利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,其特征在于,步骤c中,所述的水玻璃的含量为40%。
4.根据权利要求1或2所述的利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,其特征在于,所述的步骤f,是将E品在1200°下煅烧2h,之后冷却即得。
5.根据权利要求1或2所述的利用铝矾土生矿粉制备磨料级铝矾土熟料的方法,其特征在于,所述的步骤e中,E品的含水量小于3%。
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