1.Dalian Huarui Heavy Industry Group Co., Ltd. (hereinafter called "DHHI")
Dalian Huarui Heavy Industry Group Co., Ltd. (hereinafter called "DHHI") is a subsidiary company wholly controlled by DHI▪DCW Group Co., Ltd. It is the large, key and leading backbone enterprise in heavy machinery industry in China. At present, DHHI has 8 branches and 12 subsidiaries, with about 6000 employees and total assets over 20 billion RMB. DHHI is mainly dedicated to supplying equipment complex, product and service with high and new technical content to steel, power, energy, mine, traffic and transport industries, etc. Up to now, it has had nine major products, i.e. metallurgical machinery, hoisting machinery, bulk material handling machinery, port machinery, energy machinery, drive and control systems, marine components, engineering machinery and offshore engineering machinery, etc.
DHHI established "1 headquarter and 5 research and development bases" which cover an area of over 2 million square meters. It has the capacity for independent research and development of heavy, large technical equipment and design, manufacture, installation, commissioning with mechanical, electrical and hydraulic integration as well as EPC. It is capable of international operation with products sold to 78 countries and regions. It established the national technical center (consisting of 1 design & research institute, 7 specialized design institutes, 4 research institutes and 3 laboratories), research & development center in Germany, national postdoctoral workstation, which form a perfect scientific research and development system. It was approved by the Ministry of science and Technology of China to establish the "National Technology Research Center for Drive and Center for Drive and Control of Wind Turbine" and possessed over 350 patents, 17 famous products with national, provincial and municipal level in the world.
During the "13th Five-year Plan", DHHI will continue to take it as its task to achieve localization of heavy and large equipment, fulfill the strategy of "Talent Concentration, Innovation and Upgrading, Simultaneous Running of Production and Financing, High-quality Development", further upgrade the self-innovation capacity to promote its stable and sustainable development and create the first-class equipment manufacturing enterprise group in the world.
2.Dalian Heavy Mechanical &Electrical Equipment Engineering Co., Ltd
Dalian Heavy Mechanical &Electrical Equipment Engineering Co., Ltd is a subsidiary wholly owned by DHHI, of level-1 legal person entity, and the frontier unit of DHHI for EPC system integration and development of new technology and market. It is fully responsible for contracting, organizing large EPC turn-key projects which cover basic fields of national economy such as metallurgy, mining, energy, traffic, chemical industry, construction material, grain storage, city construction, etc. DHHI has level 2 EPC qualifications for metallurgical engineering, petrochemical engineering, mechanical and electrical engineering construction, and is capable of undertaking EPC project over the full process from commencement of civil work to final load test acceptance.
Since the establishment of Dalian Heavy Mechanical &Equipment Engineering Co., Ltd., it has set brilliant achievements in the EPC market. It has successively undertaken many large EPC projects, such as Bao Steel Majishan ore terminal, Laiwu Steel 1500mm rolling mill project, Panzhihua Steel 180,000 tons/year titanium slag furnace, Inner Mongolia Erdos 150,000 tons/year manganese-silicon alloy furnace, Xinjiang Tianye Group calcium carbide furnace project, Zhang Jiagang Rongsheng Steelmaking co., Ltd. wide and thick plate continuous casting project, Inner Mongolia Baiyan Lake calcium carbide furnace project, Beiliang group phase III 200,000 ton grain storage project, Elion Group 400,000 tons/year calcium carbide furnace EPC project, Yunnan Kungang Diqing manganese ferroalloy furnace EPC project, Anhui Huasu 1,000,000 tons/year PVC supporting project calcium carbide furnace EPC project, Xinjiang Zhongtai Metallurgy Co., Ltd. 1,000,000 tons/year calcium carbide furnace EPC project, Shanxi Xinyuan Clean Energy Source Co., Ltd. 4×48MVA calcium carbide project, Shandong Xinhai Science and Technology Co., Ltd. 12×33 MVA ferronickel project, Shandong Xinhai Science and Technology Co., Ltd. 8×48 MVA ferronickel project, Tsingtuo group 4×36 MVA ferrochrome project.
Dalian Heavy Mechanical & Equipment Engineering Co., Ltd. has more than 300 employees and has a highly skilled technical marketing team. While strengthening and developing traditional leading products such as smelting, continuous casting, continuous rolling, lime kiln and yard terminal, we have vigorously develop and expand the technology and market of DC furnace, large-sized arc furnace and intelligent arc furnace.
With "serving the society, pursuing excellence" as our preserving operating philosophy and on the basis of the support of DHHI in design and manufacturing, Dalian Heavy Mechanical &Equipment Engineering Co., Ltd. is capable of providing serial services in design, technological process, manufacturing, installation, commissioning, etc. to customer's satisfaction in various EPC projects.
3.Ferrosilicon production process
The qualified raw materials such as quartz, coke, iron ore pellet etc. will be delivered to the proportioning station outside the main building as per the smelting requirements. Mixed materials will be transferred to discharge conveyor, and then delivered via belt to the top of feed bins and then charged into the feed bins via triangle belt conveyor. From feed bins, the materials will enter the furnace through charging chute. Intermittent feeding method is adopted. Another charging chute is set up outside the furnace to deliver materials to second floor platform where materials are reclaimed by stoking machine and fed into furnace randomly.
The materials are fed into semi-enclosed ferrosilicon furnace. The current will be introduced into furnace via 3-phase electrode from power supply through the transformer. The electric arc produced by reaction of electrode and materials will emit heat to the smelting bath fully filled with materials. With the heat of electric arc and resistance, the materials mixed with silica, semi-coke and ironworks (steel scrap or pellet) are smelted and finally reduced to ferrosilicon. During the smelting process, the voltage grade and current intensity of the electrode are set as per smelting parameters. Since the voltage and current at different stage are not the same, the power capacity in the furnace will vary. The electrode is always inserted into the materials stably and gas is escaping evenly from the material top surface, and arc will not be exposed. Uniformly blended materials are fed into the furnace in batches when the material level drops, thus to ensure the level of material remains the same in a cone around the electrode. In order to ensure good permeability of material layers during smelting process, the high temperature gas generated from the reaction will pass through the material layers evenly and slowly to heat and reduce the materials. The material surface shall be observed periodically and treated by using stoking machine.
When the ferrosilicon produced in the furnace accumulates to certain extent, use the burner to open the tap hole so as to release the liquid ferrosilicon into the ladle. After the tapping process is over, plug the tap hole. The ladle will be transferred via rail car to the casting workshop and lifted via crane to the casting machine.
4.DHHI's Main References on Manganese-silicon, Ferrosilicon and Ti-slag Furnaces
No. |
Name of Customer |
Type of Furnace |
(KVA)
Capacity(KVA) |
Quantity |
Contract
Signing Time |
Remark |
| 1 |
EJM
Inner Mongolia Erdos Manganese-Silicon Alloy Co., Ltd. |
Closed-type manganese-silicon furnace |
25500 |
4 |
2006 |
General Contract |
| 2 |
Erdos Xijin Mining and Metallurgy Co., Ltd. |
Closed-type manganese-silicon furnace |
25500 |
4 |
2007 |
General Contract |
| 3 |
Qinzhou Yongsheng Manganese Industry Co., Ltd. |
Closed-type manganese-silicon furnace
Refining furnace |
25500 |
3 |
2009 |
General Contract |
| 4 |
Yunnan Kungang Ferroalloy Co., Ltd. |
Closed-type manganese-silicon furnace |
33000 |
2 |
2010 |
EPC
EPC |
| 5 |
Guangxi Shagang Manganese Industry Co., Ltd. |
Closed-type manganese-silicon furnace |
25500 |
8 |
2010 |
General Contract |
| 6 |
Eramet Group Comilog SA. Gabon |
Semi-closed manganese-silicon furnace |
30000 |
2 |
2012 |
Main Equipment |
| 7 |
Guizhou Jinyuan Investment Co., Ltd. |
DC manganese-silicon furnace |
30000 |
2 |
2012 |
General Contract |
| 8 |
Shandong Mingsheng Mental Material Co., Ltd. |
Semi-closed manganese-silicon furnace |
25500 |
2 |
2012 |
General Contract |
| 9 |
Chongqing Dalang Metallurgy New Material Co., Ltd. |
SiMn Furnace
Ferromanganese Furnace |
36000 |
8 |
2015 |
General Contract |
| 10 |
CPI Suiyang Chemical Industry Co., Ltd. |
Closed High Carbon Ferromanganese Furnace |
39000 |
1 |
2015 |
Main Equipment |
| Closed Manganese-silicon Furnace |
39000 |
5 |
2015 |
Main Equipment |
| Closed Manganese-silicon Furnace |
25500 |
2 |
2015 |
Main Equipment |
Refining furnace |
5000 |
1 |
2015 |
Main Equipment |
| 11 |
Ningxia Shengyan Industrial Group Circular Economy Co., Ltd. |
Refining furnace |
6300 |
2 |
2017 |
Main Equipment |
| 12 |
()
Guizhou Southwest Tailong Group Co.,
Ltd. |
SiMn Furnace
|
30000 |
1 |
2018 |
Main Equipment |
| 13 |
Guangxi Chiyi Iron and Steel Co., Ltd. |
SiMn Furnace |
30000 |
1 |
2020 |
EPC
EPC |
| 14 |
Shandong Mingsheng Mental Material Co., Ltd. |
SiMn Furnace Modification |
25500 |
1 |
2020 |
Main Equipment |
| 15 |
()
Xingtai Science and Technology Co., Ltd of Pangang Group Co., Ltd. |
Internal- combustion-type titanium slag furnace |
25500 |
1 |
2006 |
General Contract |
| 16 |
Sichuan Lomon Group Co., Ltd. |
Internal combustion type |
9000 |
1 |
2006 |
General Contract |
| 17 |
Jiangsu Delong Nickel Industry |
Direct Reduced Iron Furnace |
69000 |
1 |
2019 |
Main Equipment |
| 18 |
Erdos Junzheng Energy & Chemical industry Co., Ltd. |
Ferrosilicon |
60000 |
6 |
2014 |
General Contract |
| 19 |
Erdos Sijin Mining And Metallurgy Co., Ltd. |
Ferrosilicon
|
25500 |
4 |
2015 |
Main Equipment |
| 20 |
Iran Ahan & Silic Azarakhsh Co. |
Ferrosilicon |
36000 |
1 |
2019 |
Main Equipment |
| 21 |
IFC
Iran Ferrosilicon Company |
Ferrosilicon |
60000 |
1 |
2022 |
Main Equipment |
| 22 |
MAAD
Iran Maad Ferroalloy Company |
Ferrosilicon |
39000 |
1 |
2022 |
Main Equipment |
| 23 |
Karaganda Complex Alloys Plant LLP |
Ferrosilicon |
36000 |
4 |
2022 |
General Contract |
| 24 |
Lotus Adli Ferroalloy Co. |
Ferrosilicon |
63000 |
1 |
2023 |
Main Equipment |
Audited Supplier 
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