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Method for producing cement clinker and oxide pellets

A technology of cement clinker and oxidized pellets, which is applied in the field of metallurgy, can solve the problems of low grinding index, many harmful elements, and difficulty in blast furnace smelting, and achieve the effects of saving electric energy, good metallurgical performance, and improving production efficiency

Active Publication Date: 2017-05-10
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cement industry has problems such as backward overall technology, high energy consumption and low efficiency, and serious environmental costs. Therefore, the innovation and application of cement production technology is imminent
At the same time, when the cement is fired in a single block, the interior cannot be burned through in a short time
[0003] On the other hand, in my country, high-iron ore resources are relatively poor, the grade is relatively low, there are many harmful elements, high harmful impurities such as sulfur, and low grinding index
Iron ore powder with low grade is also difficult to be used in blast furnace smelting

Method used

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  • Method for producing cement clinker and oxide pellets
  • Method for producing cement clinker and oxide pellets
  • Method for producing cement clinker and oxide pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The pyrite, copper smelting slag, limestone, and binder are respectively crushed and ground to about 0.075mm, which accounts for 8% of the screen. After that, 68 parts by weight of pyrite, 30 parts by weight of copper smelting slag, 20 parts by weight of limestone and 6 parts by weight of binder were mixed uniformly, and the pellet core was formed in the first pelletizing plate, and passed through a sieve The sieving device performs sieving, and the particle size is about 9-14mm for the next step. After the particle size does not meet the requirements, it will continue to be used as the pelletizing raw material. The fly ash and limestone are in accordance with the CaO / SiO contained in the cement clinker produced 2 =2 ratio for compounding and adding 4% of the total raw material weight percentage of binder, mixing uniformly. The fly ash and limestone mixture and the prepared pellet cores are fed into the second pelletizing disk through a feeder, and the water volume and t...

Embodiment 2

[0043] The pyrite, nickel smelting slag, limestone, and binder are all crushed and ground to about 0.075mm, which accounts for 10% of the screen. Afterwards, 78 parts by weight of pyrite, 20 parts by weight of nickel smelting slag, 23 parts by weight of limestone and 4 parts by weight of binder were mixed uniformly, and the pellet core was formed in the first pelletizing disc, and passed through a sieve The sieving device performs sieving, and the particle size is about 9-14mm for the next step, and the particle size that does not meet the requirements is processed and continues as the pelletizing raw material. The fly ash and limestone are in accordance with the CaO / SiO contained in the cement clinker produced 2 =2.2 proportion of ingredients and adding 6% of the total raw material mass percentage of binder, mixing uniformly. The fly ash and limestone mixture and the prepared pellet cores are fed into the second pelletizing disk through the feeder, and the water volume and the...

Embodiment 3

[0046] Pyrite, blast furnace vanadium-titanium slag, limestone, and binder are respectively crushed and ground to about 0.075mm, accounting for 12% of the screen. After that, 88 parts by weight of pyrite, 10 parts by weight of blast furnace vanadium-titanium slag, 25 parts by weight of limestone and 2 parts by weight of binder were mixed uniformly to form a pellet core in the first pelletizing plate, and passed The sieving device performs sieving, the particle size is about 9-14mm for the next step, and the particle size does not meet the requirements for processing and continues as the pelletizing raw material. The fly ash and limestone are in accordance with the CaO / SiO contained in the cement clinker produced 2 =2.4 ratio of ingredients and 8% of the total raw material mass percentage of binder is added, and the mixture is uniform. The fly ash and limestone mixture and the prepared pellet cores are fed into the second pelletizing disk through a feeder, and the water volume a...

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Abstract

The invention discloses a method for producing cement clinker and oxide pellets. The method comprises the following steps: (1) respectively crushing and grinding iron ores, iron-bearing minerals, limestone and adhesive, uniformly mixing according to a proportion to obtain an inner core raw material, mixing pulverized fuel ash and limestone according to a proportion, adding adhesive, and uniformly mixing to obtain an outer layer raw material of pellets; (2) pelletizing the inner core raw material to obtain pellet inner cores; (3) pelletizing by using the pellet inner core as female parent pellets and the outer layer raw material of pellets as a raw material to obtain compound pellets; (4) drying the compound pellets; (5) roasting the dried compound pellets in the air to obtain roasted pellets; (6) cooling the roasted pellets out of a furnace to pulverize the outer layer of the roasted pellets, namely pulverizing the outer layer to obtain cement clinker, and obtaining inner pellets as oxidized pellets; and (7) collecting the roasted cement clinker and oxidized pellet ore. The method can be used for simultaneously producing cement clinker and oxidized pellet ore, so that the production efficiency is improved, and energy conservation and emission reduction can be achieved.

Description

Technical field [0001] The invention belongs to the field of metallurgy, and specifically relates to a method for producing cement clinker and oxidized pellets. Background technique [0002] With the development of my country's economy and industry, the construction industry continues to rise, as the scale of national infrastructure continues to increase, the amount of cement required continues to rise, and the technology for efficient production of cement raw materials is also valued by the construction industry. However, the cement industry has problems such as backward technology, high energy consumption and low efficiency, and serious environmental costs. Therefore, the innovation and application of cement production technology is imminent. At the same time, when the cement is fired in a single block type, the interior cannot be burnt through in a short time. [0003] On the other hand, in my country, high-speed iron ore resources are relatively poor, the grade is also relativ...

Claims

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Application Information

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IPC IPC(8): C22B1/244C22B1/02C04B7/26C04B7/44
CPCC04B7/26C22B1/02C22B1/2406C22B1/244C04B7/44Y02P40/10Y02P40/121
Inventor 王岩刘占华王欣陈文亮丁银贵曹志成薛逊吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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