Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for calcining cement clinker by using high-sulfur coal
The invention discloses a method for calcining cement clinker by using high-sulfur coal, which comprises the following process steps: S1, selecting fluorite mine mining waste residue with CaF2 content of 1-2% as a siliceous material, selecting lead-zinc slag with ZnO content of 1-3% and PbO content of 2-5% as a siliceous material, and mixing the fluorite mine mining waste residue and the lead-zinc slag; grinding 4-6% of fluorite mine mining waste residues, 2-3% of lead-zinc residues and other raw materials for preparing the raw material of the calcined cement clinker into a raw material; s2, when the raw materials are ground, the content of CaF2 in the raw materials needs to be controlled to be 0.1%-0.5%, and the content of ZnO and the content of PbO in the raw materials need to be controlled to be 0.05%-0.2; and S3, calcining the ground raw material in a rotary cement kiln by using high-sulfur pulverized coal as fuel. According to the invention, CaF2 in the fluorite mine tailings and SO3 generated by sulfur in the high-sulfur coal in the calcining process of the cement clinker form a composite mineralizer in the calcining process of the clinker, and ZnO and PbO in the lead-zinc slag are utilized to reduce the firing temperature of the clinker in the calcining process of the clinker, so that calcium sulphoaluminate and tricalcium silicate coexist in the clinker, the strength of the clinker is improved, and the heat consumption of the clinker is reduced.
本发明公开了一种采用高硫煤煅烧水泥熟料的方法，高硫煤煅烧水泥熟料的工艺步骤如下：S1：选取CaF2含量在1％‑2％的萤石矿采矿废渣作为硅质材料，选取ZnO含量在1‑3％、PbO含量在2‑5％的铅锌渣，按萤石矿采矿废渣4‑6％、铅锌渣2‑3％与配制煅烧水泥熟料的生料的其他原材料一起磨制成生料；S2：在磨制生料时要控制生料中的CaF2含量在0.1％‑0.5％之间和ZnO、PbO含量分别控制在0.05％‑0.2之间；S3：将上述磨制的生料用高硫煤粉为燃料在水泥回转窑中煅烧。本发明采用萤石矿尾矿中的CaF2与高硫煤中的硫在水泥熟料煅烧过程中产生的SO3在熟料煅烧过程中形成复合矿化剂，利用铅锌渣中的ZnO、PbO，在熟料煅烧过程中降低熟料烧成温度，使硫铝酸钙与硅酸三钙在熟料中共存，提高熟料强度，降低熟料热耗。
Method for calcining cement clinker by using high-sulfur coal
The invention discloses a method for calcining cement clinker by using high-sulfur coal, which comprises the following process steps: S1, selecting fluorite mine mining waste residue with CaF2 content of 1-2% as a siliceous material, selecting lead-zinc slag with ZnO content of 1-3% and PbO content of 2-5% as a siliceous material, and mixing the fluorite mine mining waste residue and the lead-zinc slag; grinding 4-6% of fluorite mine mining waste residues, 2-3% of lead-zinc residues and other raw materials for preparing the raw material of the calcined cement clinker into a raw material; s2, when the raw materials are ground, the content of CaF2 in the raw materials needs to be controlled to be 0.1%-0.5%, and the content of ZnO and the content of PbO in the raw materials need to be controlled to be 0.05%-0.2; and S3, calcining the ground raw material in a rotary cement kiln by using high-sulfur pulverized coal as fuel. According to the invention, CaF2 in the fluorite mine tailings and SO3 generated by sulfur in the high-sulfur coal in the calcining process of the cement clinker form a composite mineralizer in the calcining process of the clinker, and ZnO and PbO in the lead-zinc slag are utilized to reduce the firing temperature of the clinker in the calcining process of the clinker, so that calcium sulphoaluminate and tricalcium silicate coexist in the clinker, the strength of the clinker is improved, and the heat consumption of the clinker is reduced.
本发明公开了一种采用高硫煤煅烧水泥熟料的方法，高硫煤煅烧水泥熟料的工艺步骤如下：S1：选取CaF2含量在1％‑2％的萤石矿采矿废渣作为硅质材料，选取ZnO含量在1‑3％、PbO含量在2‑5％的铅锌渣，按萤石矿采矿废渣4‑6％、铅锌渣2‑3％与配制煅烧水泥熟料的生料的其他原材料一起磨制成生料；S2：在磨制生料时要控制生料中的CaF2含量在0.1％‑0.5％之间和ZnO、PbO含量分别控制在0.05％‑0.2之间；S3：将上述磨制的生料用高硫煤粉为燃料在水泥回转窑中煅烧。本发明采用萤石矿尾矿中的CaF2与高硫煤中的硫在水泥熟料煅烧过程中产生的SO3在熟料煅烧过程中形成复合矿化剂，利用铅锌渣中的ZnO、PbO，在熟料煅烧过程中降低熟料烧成温度，使硫铝酸钙与硅酸三钙在熟料中共存，提高熟料强度，降低熟料热耗。
Method for calcining cement clinker by using high-sulfur coal
一种采用高硫煤煅烧水泥熟料的方法
YU SANPING (Autor:in) / TIAN ZHENGBI (Autor:in) / ZHAN XIANCHAO (Autor:in) / LIU GUILIN (Autor:in) / HUANG FENG (Autor:in)
02.06.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Method for calcining cement clinker by using high-sulfur coal as fuel
| Europäisches Patentamt | 2022