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Pouring molten iron and smelting process of natural gas powered cylinder

A power cylinder and natural gas technology, which is applied in the field of pouring molten iron for natural gas power cylinders and its smelting process, can solve problems such as poor mechanical properties, low casting strength, and unsatisfactory performance, and achieve the goals of improving quality, meeting demands, and improving mechanical properties Effect

Active Publication Date: 2014-02-26
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The castings obtained after pouring have low strength and poor mechanical properties, which cannot meet the requirements of natural gas power cylinders

Method used

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  • Pouring molten iron and smelting process of natural gas powered cylinder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The smelting process of pouring molten iron into the natural gas-powered cylinder body of the present embodiment comprises the following steps:

[0080] (1) Prepare raw materials in the following parts by weight: 1250 parts of Q12 Benxi pig iron, 250 parts of steel scrap, 700 parts of returned iron, 4 parts of ferrochromium, 6 parts of ferromolybdenum, 9 parts of copper, and 9 parts of ferrosilicon;

[0081] (2) First add ferromolybdenum and soldering iron to the furnace bottom of the smelting vessel, and then add Q12 Benxi pig iron, scrap steel, returned iron and ferrosilicon for melting;

[0082] (3) After the charge in the smelting container is completely melted, the temperature is raised to 1310°C and the slag is removed;

[0083] (4) Pre-stove inspection and composition adjustment;

[0084] (5) Add copper when the temperature rises to 1310°C; continue to heat up to 1450°C, and prepare to be released when the temperature is 1430°C.

[0085] (6) The molten iron in ...

Embodiment 2

[0091] The smelting process of pouring molten iron into the natural gas-powered cylinder body of the present embodiment comprises the following steps:

[0092] (1) Prepare raw materials in the following parts by weight: 1250 parts of Q12 Benxi pig iron, 250 parts of steel scrap, 700 parts of returned iron, 4 parts of ferrochromium, 6 parts of ferromolybdenum, 9 parts of copper, and 9 parts of ferrosilicon;

[0093] (2) First add ferromolybdenum and soldering iron to the furnace bottom of the smelting vessel, and then add Q12 Benxi pig iron, scrap steel, returned iron and ferrosilicon for melting;

[0094] (3) After the charge in the smelting container is completely melted, the temperature is raised to 1390°C and the slag is removed;

[0095] (4) Pre-stove inspection and composition adjustment;

[0096] (5) Add copper when the temperature rises to 1390°C; continue to heat up to 1460°C and keep warm for 5 minutes before being ready to be released from the furnace;

[0097] (6)...

Embodiment 3

[0103] The smelting process of pouring molten iron into the natural gas-powered cylinder body of the present embodiment comprises the following steps:

[0104] (1) Prepare raw materials in the following parts by weight: 1250 parts of Q12 Benxi pig iron, 250 parts of steel scrap, 700 parts of returned iron, 4 parts of ferrochromium, 6 parts of ferromolybdenum, 9 parts of copper, and 9 parts of ferrosilicon;

[0105] (2) First add ferromolybdenum and soldering iron to the furnace bottom of the smelting vessel, and then add Q12 Benxi pig iron, scrap steel, returned iron and ferrosilicon for melting;

[0106] (3) After the charge in the smelting container is completely melted, the temperature is raised to 1320°C and the slag is removed;

[0107] (4) Pre-stove inspection and composition adjustment;

[0108] (5) Add copper when the temperature rises to 1320°C; continue to heat up to 1450°C and then keep it for 10 minutes, and then prepare to be released when the temperature is 1430...

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Abstract

The invention discloses pouring molten iron and a smelting process of a natural gas powered cylinder. The pouring molten iron is used for solving the problem of bad shrinkage compensation property of the existing pouring molten iron. The pouring molten iron of natural gas powered cylinder disclosed by the invention is composed of the following components in percentage by weight: 3.55-3.65% of carbon, 2.1-2.3% of silicon, 0.5-0.6% of manganese, 0-0.06% of phosphor, 0-0.02% of sulfur, 0.15-0.25% of chromium, 0.5-0.7% of copper, 0.15-0.25% of molybdenum, 0.007-0.009% of magnesium, 0.025-0.030% of rhenium and the balance of iron. The pouring molten iron disclosed by the invention has good shrinkage compensation property, so that the quality of a casting is improved; the poured casting has high strength and good mechanical property to meet the requirements of the natural gas powered cylinder.

Description

technical field [0001] The invention belongs to the technical field of natural gas power cylinders, and in particular relates to a pouring molten iron for natural gas power cylinders and a smelting process thereof. Background technique [0002] In the prior art, natural gas is mainly compressed by a pipeline release steam turbine and a centrifugal natural gas compressor. [0003] At present, domestic and foreign natural gas compressors are mainly divided into high-speed and high-power reciprocating piston compressors and low-speed reciprocating compressors. Among them, the high-speed and high-power reciprocating piston compressor, with a speed n of 1000r / min and a power P of 6000kW, is mainly used for natural gas gathering and transportation pressurization and gas injection in gas storage. It is an indispensable equipment for natural gas exploration, development and storage . The power cylinder is the main part of the natural gas compressor to provide power during the proc...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C33/06C21C7/00
CPCY02P10/143
Inventor 李荣飞刘锐张前李振波张钰廖渝隆朱文武吴中麒谭昭金杨鹏刘明星姜超谭学木段悦洪李胜钟明春李健凌波
Owner BC P INC CHINA NAT PETROLEUM CORP
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