MENU
The blast furnace is charged continuously with iron-bearing burden, slag formers, and coke. The iron burden consists of sinter, pellets, and/or lumpy ore in various proportions. Slag formers are usually limestone, BOF slag, and quartzite in small amounts to balance the slag rate and chemistry.
عرض المزيد
Intelligent sensor for coal powder rate injection in slag cleaning furnace 779 During the vessel discharge, the operator tries to maintain the coke flowrate by manipulating the set point of the pressure controller on the nitrogen line. Sometimes the blow valve is used to reverse the coke compactness in the lower part of the cone.
عرض المزيد
The reduction of Cu2O from slags is carried out by adding carbon/coke or by injection of various reductants (e.g., diferent types of oil or natural gas). Reductants are traditionally …
عرض المزيد
A promising copper–cobalt slag cleaning technique has been proposed, involving employing gypsum wastes as a sulfurizing agent to sulfurize copper, ... Efficient Recovery of Copper and Cobalt from the Matte–Slag Mixture of ISA Furnace by Injection of Coke and Pyrite. Xu Yang Jialiang Zhang +5 authors Chengya Wang.
عرض المزيد
DOI: 10.1016/j.fuel.2023.130492 Corpus ID: 265538693; Evolution and modification of physicochemical properties of coal-coke-slag powder within the tuyere 's nest area of a blast furnace
عرض المزيد
In parallel test runs in the pilot scale EAF of IME have been conducted in order to demonstrate the feasibility of a slag cleaning treatment by coke injection. It has been found that the...
عرض المزيد
In parallel test runs in the pilot scale EAF of IME have been conducted in order to demonstrate the feasibility of a slag cleaning treatment by coke injection. It has been found that the pro-cess ...
عرض المزيد
When using one injection lance, the maximum injecting quantity is 10 000 N cum/h. If the injection amount is higher, part of the gas will not combust in the tuyere but will enter into the blast furnace unburned. For two injection lances, the maximum injecting quantity is increased to 15 000 N cum/h, due to better combustion conditions.
عرض المزيد
The cleaning of copper smelting slag requires magnetite and cuprous oxide reduction. The slag reduction with coke, injected coal powder or bunker oil is strongly endothermic and requires heat generation by fuel combustion or the use of electric energy. The reduction of fayalitic slag with calcium carbide is slightly exothermic and the formed …
عرض المزيد
adding carbon/coke or by injection of various reductants (e.g., different types of oil or natural gas). Reductants are traditionally introduced into a metallurgical vessel such as a copper slag
عرض المزيد
1 School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, China; 2 Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery, Shanghai Jiao Tong University, Shanghai, China; 3 School of Metallurgy, Northeastern University, Shenyang, China; Copper slag is a solid …
عرض المزيد
By Dr. Fathi Habashi If organic chemistry is the chemistry of carbon, then ferrous metallurgy is the technology of carbon. Carbon in the form of coal is used in metallurgy as a fuel, but the major use is to make coke that is an essential component of the feed to iron blast furnaces. For each ton of iron produced, half a ton of coke is used. …
عرض المزيد
Fuel injector cleaner: Available at auto parts stores, these are specially formulated to clean fuel injectors. 2. Fuel system cleaner or fuel additive: These products can help remove carbon buildup in the fuel system. 3. Fuel pressure gauge: To monitor the fuel pressure while cleaning. 4. Basic hand tools: To access the fuel rail and injectors.
عرض المزيد
First, it provides the theoretical analysis of requirements that ensure minimum coke and carbon rates, and minimum CO 2 emissions. Then it focuses on the injection of selected ARA, such as pulverized coal, biomass products, and hydrogen containing gases – natural gas, coke oven gas and pure H 2. Conversion behaviour of mentioned ARA and ...
عرض المزيد
A powder injection device was purpose-made to inject additives into molten slag in dispersion state, and a laboratory experiment was carried out to simulate this …
عرض المزيد
The present work helps to understand the behaviors of various elements in copper smelting slag cleaning using coke and biochar. The main motivation for the …
عرض المزيد
Lime injection provides an ideal solution to maintaining a good y slag. It is a controlled process based on the slag conditions and is able to maintain consistent basicity, fluidity and iness. Lime and dolomitic lime injection in the EAF provides a significant shift from traditional practices.
عرض المزيد
The results showed that copper and cobalt contents in cleaned slag could decrease averagely to 0.18% and 0.071% respectively after cleaning. 91.99% Cu and 92.94% Co and less than 38.73% Fe were ...
عرض المزيد
Biochar improved kinetics of the slag cleaning when compared to coke; higher distribution coefficients were achieved quicker and consequently lower metal concentrations in slag, thus causing a lower matte grade (high Fe in matte). ... addition and/or stirring by submerged gas injection. The battery scrap addition did increase the …
عرض المزيد
A large number of graphite crystals (gray phases in Figure 1(a)) as well as slag particles (white phases in Figure 1(a)) were observed on the surface of coke samples. The graphite crystals were present in various morphologies including flake (Figure 1(b)), plate (Figure 1(c)), columnar (Figures 1(d), (e)), which are similar to the forms of natural …
عرض المزيد
The blast furnace operating at Rourkela Steel Plant suffered the sudden collapse of the top cone of the dust catcher leading to damages to the down-comer, dust catcher and gas cleaning plant. Both the down-comers later fell damaging the cast-house and the furnace top structure. This abrupt stoppage of the furnace led to a chilled hearth …
عرض المزيد
Slag from an electric slag cleaning furnace was injected with methane and air mixtures to facilitate the recovery of copper and cobalt. The effects of methane-to-air ratio, gas flow …
عرض المزيد
This generates a lower volume for the transfer of silicon to the hot metal. Decrease of silicon content in the hot metal by 1 % improves the coke rate by 5 % to 15 %. Properties of slag have considerable effect on the coke rate. Lower specific volume of slag of lower viscosity improves the coke rate of the blast furnace.
عرض المزيد
Figure 1 shows the calculated changes in slag and gas compositions as a function of the reduction degree. The lower content of FeO 1.5 in liquid oxide, shown as the X-axis in Fig. 1, represents a higher reduction degree.The equilibrium calculation was carried out stepwise in an open system where the formed gas phase was removed from …
عرض المزيد
The first treatment improved slag cleaning directly in the submerged arc furnace (SAF) using coke injection. The benefit of this process in comparison to the traditional method is that it ...
عرض المزيد
The reduction of lead-rich slag with metallurgical coke is one of the major reactions in the dripping zone of the lead blast furnace. However, because the conditions of this zone are hard to ...
عرض المزيد
Enter the email address you signed up with and we'll email you a reset link.
عرض المزيد
The initial study to control the coal rate injected into a slag-cleaning furnace (SCF), based on a soft sensor, was developed at Caletones Smelter, Chile. The old …
عرض المزيد
The variables used were oxygen concentration in the blast, coke breeze addition and nitrogen injection stirring. In all the experiments, slag and matte co-existed. ... A slag cleaning step, which ...
عرض المزيد
At present, coke and anthracite coal are mainly used in EAFs for the slag ing practice and inserted in the process as powder by means of pneumatic injection [4].
عرض المزيد
Metal Losses to the Slag in Smelting and Converting. 80% of the copper produced from ores worldwide originates from sulfide ores. The copper concentrate which results from flotation of the ore is typically smelted and converted to blister copper [].During smelting S and Fe are oxidized, where SiO 2 is added to form a liquid ferric or ferrous …
عرض المزيد
A new intensive slag cleaning reactor can be used for recovery of ferro-alloys, recycling of steel mill waste, and the reconditioning of waste deposits. ... A floating coke bed on the slag surface ...
عرض المزيد
2.2 Computations. In this section, the final BF slag compositions formed from different kinds of charge materials are compared. Typical slag compositions [15, 16, 19] as well as compositions after replacements are shown in Table 2.CaO and MgO are the basic constituents of the slag, whereas SiO 2 and Al 2 O 3 are the acid constituents. [] …
عرض المزيد
In the trials the injection coke for slag ing was replaced by an HDPE/coke blend. About 22 heats could be evaluated in comparison to standard operation. The use of the HDPE/coke blend led to a better slag ing according to visual observations, a reduced specific energy consumption (–3%), a reduced power-on time …
عرض المزيد
Assuming a coke consumption of 350 kg coke per tonne of hot metal and replacing it with 5% torrefied biomass injected as PC with an additional 100 m3/tHM biogas injection, the BF's CO2 emission related …
عرض المزيد
Massive copper slag containing heavy metals is produced in copper making and 0.5 - 8.0 wt% Cu is lost into it, deserving to be recovered. In this study, the waste coke and gypsum were employed to clean the copper slag, the lost copper was reduction-sulfurized and enriched to the matte droplets. Howe …
عرض المزيد
Copyright © 2024 Sofol Industry & Technology Group Co., Ltd.
المنتجات
محلول
حول الولايات المتحدة
اتصل بنا