· This paper presents a new soil amendment used for immobilization of soil Pb, produced from vinegar residue, stainless steel slag, and weathered coal. The pH value measuring, granulation and adsorption experiments were carried out to determine the optimal composition of soil amendment. Optimizing soil amendment B2 was composed of …

Preliminary work was carried out by using a laboratory ball mill to investigate the grindability of the steel slag and OPC clinker when ground separately and interground for periods of …

 · purpose of this study is to investigate the reinforcing effect of slag on coal gangue geopolymer and analysis the reaction mechanism of alkali activator slag-coal gangue. 2. Experimental procedures . 2.1. Materials . The coal gangue selected (clay rock coal gangue) was calcined at a constant temperature of 700°C for 2 hours.

 · Coal gangue, an industrial solid waste discarded from coal mining and processing, was used as the sole raw material to prepare brick. The coal gangue was crushed, homogenized, milled and then pressed into green compacts. The dried compacts were sintered at different temperatures for 2 h. The obtained brick samples were …

 · The coal gangue was crushed and sieved according to GB/T 14685-2011 for the preparation of ordinary concrete. The particle size of the sieved coal gangue coarse …

 · In this paper, slag is used as a calcium source to make alkali-activated coal gangue-slag (AACGS) based material. The reaction mechanism of AACGS materials was discussed in depth by means of XRD, FT-IR, 29 Si MAS-NMR (nuclear magnetic resonance) and SEM-EDS (energy dispersive spectrometer). The experimental results show that …

What is coal slag? This stuff is boiler slag, which is a recycled product from coal burning plants. When coal is "fired" at over 2500 degrees it melts and produces a by-product called slag. When the slag is cooled through a process called vitrification, it crystallizes, forming sharp, angular granules in a variety of sizes.

 · The results show that the coal gangue recognition rate with the same recognition algorithm by using the intercepted signal samples is higher than that of the feature vector samples, the Staking ...

 · Coal gangue with a high carbon content (>20%) is commonly used for power generation and heating. Coal gangue has a low carbon content (<4% or 4%–6%) can be …

 · A novel underground device for separation of coal and gangue was introduced. Mixed materials of coal and gangue from five coal mines were crushed and tested using five rotor speeds. The results showed that separation of coal and gangue underground can be executed effectively under certain conditions: the greater the hardness difference …

 · The existence of coal gangue seriously restricts coal selection rates and quality, so the separation of coal gangue is a vital step in coal production and is an important method of improving coal ...

 · The steel slag and coal gangue used in this work were sourced from Hunan, China, with particle size ranging from 0.25 to 0.425 mm. By using XRF, the main …

This paper uses an infrared camera (IC) to distinguish between coal and gangue in the industrial mining field and achieves a high classification accuracy 97.83 % by using Gaussian-SVM. Distinguishing between coal and gangue in the production lines of mining factories based on the thermal energy and infrared radiation emission of an object is …

 · Water absorption (%) 2.653 . 0.5 . 91 . 92 . 2.3 Stainless steel slag waste 93 The stainless steel slag waste used in this investigation was obtained from a producer of 94 ferritic stainless steel produced by a steel plant Acerinox in Algeciras, Cádiz, Spain. The 95 steel slag is produced during the direct reduction of iron in an electric arc furnace. 96 …

the method of electric flux was as follows: 1) cylinder specimens with diameter of (100 ± 1) mm and height of (50 ± 2) mm were cured for 28 days; 2) silica gel or resin sealing material was applied to brush the cylinder side of the specimen, and the specimen was vacuum-saturated; 3) 0.3 mol/l naoh solution and 3% nacl solution were placed in the …

 · U.S. ferrous slag production, but domestic slag sales1 in 2019 were estimated to be 17 million tons valued at about $470 million. Blast furnace slag was about 50% of the tonnage sold and accounted for 88% of the total value of slag, most of which was granulated. Steel slag produced from basic oxygen and electric arc furnaces accounted …

 · Six copper slag and 2 coal slag abrasive products from 6 different suppliers were selected for evaluation. A G-40 steel grit was used as a control. Triplicate six-inch …

Coal gangue (CG) and coal gasification slag (CGS) contain a large amount of siliceous and aluminous minerals and have certain pozzolanic reactivity. In recent years, the use of CG and CGS as SCMs in concrete attracted more researcher's attention. Wang et al. studied the effects of CG with different fineness (200, 325, 500, 1250, and 2000 mesh ...

 · The utilization amount of coal gangue was 480 million tons in 2013, accounting for 64% of the total output, of which approximately 150 million tons of coal gangue were …

 · Noun ()Waste material from a coal mine. * 2011, Vivienne Dockerty, A Woman Undefeated, page 54, After the big village, the scenery had returned to grass and woodland, but this had now given way to ugly mounds of discarded slag'.Beyond the ' slag was a colliery with its machinery and smoking chimney, making the whole area look grim and …

 · Coal resources play a vital role in the current energy supply worldwide, especially in China [].As a solid waste generated during coal mining and coal washing, coal gangue production is enormous, accounting for about 10%–15% of coal production [].In China alone, the output of raw coal was 3.97 billion tons, and the emission of coal …

This stuff is boiler slag, which is a recycled product from coal burning plants. When coal is "fired" at over 2500 degrees it melts and produces a by-product called slag. When the slag is cooled through a process called vitrification, it crystallizes, forming sharp, angular granules in a variety of sizes. We reclaim this slag and put it ...

 · Coal gangue is a significant residue during the processing of coal mining and coal washing, which accounts for approximately 10–15% of raw coal production and becomes one of the largest industrial residues in …

The capacitance method and SVM are applied to identify coal and gangue, and accurate and efficient identification results are obtained, providing a new feasible solution for research on coal gangue identification. To solve the problems of the difficult feature extraction, poor feature credibility and low recognition accuracy of coal and gangue, this paper utilizes the …

 · Case II. CFA of coal gangue disposal. In this case, CFA was performed with the objective of estimating the CO 2 emissions related to the disposal activity of CG. Globally, there is no uniform mode of disposal for CG, for the brevity of study, the disposal method considered is specific to Bhupalpally mine site, Telangana State, India.

 · Coal gangue, a by-product produced during the coal processing, has a serious impact on the environment. Using coal gangue as a fertilizer has been proven helpful in potentially reducing its environmental impact and improving its value. In this study, the formation mechanism and influencing factors of coal-gangue-based silicon fertilizer was …

The undisturbed coal gangue was screened in the mining area, and the coal gangue with a particle size less than 30 mm was separated (Figure 1). The coal gangue with a particle size greater than 30 ...

 · Six copper slag and 2 coal slag abrasive products from 6 different suppliers were selected for evaluation. A G-40 steel grit was used as a control. Triplicate six-inch (15-centimeter) by six-inch (15-centimeter) panels were blasted to SSPC-SP 5, White Metal, using each test abrasive and the G-40 steel grit control for a total of 27 panels.

 · A novel underground device for separation of coal and gangue was introduced. Mixed materials of coal and gangue from five coal mines were crushed and tested using …

 · There are several ways to use: 1. Recovery of coal and pyrite: Through a simple process, good coal is washed from coal gangue, low-quality coal is selected from it through screening, and pyrite is selected at the same time. Or recover pyrite, mixed coal and middling coal from the jig used for coal preparation ─ ─ plane shaker process.