Ball mill lining board and the wear of iron forging primary has two ways: one is the high stress abrasion, 2 it is chisel cutting type wear.
Wear and tear of high stress, the lining board surface hardness is as high as possible, to resist the pressure of abrasive, reduce surface embrittlement drop phenomenon.
Lining board to chisel cutting wear, requirement can bear the impact load of must, ball mill liner, iron forging and shaft kiln lining brick, due to the impact of the abrasive occurred is not big, because of its first is given priority to with high stress abrasion wear way.
So when select material, marching to its abrasion resistance, hardness of priority data.
And cast iron wear resistance ledeburite in the arrangement of primary depends on its quantity, the hardness, the greater the leydig in the arrangement of the greater the volume.
Let's come into the production workshop to take a look at the iron forging and lining plate lining brick production technology.
A, and the fruit of the iron forging choose 0.
Two small cupola 5 t.
JiaoTie than 1:6;
Choose 5 small iron water-cooling mould, packet of point injection, successive operations, production value of 300 ~ 400 kg class.
Ingredients share (
The mass fraction)
# 20 pig iron, scrap steel, 40%.
Foundry return, 30%;
Second, lining board, and the fruit of the lining brick choose 2.
Hot air cupola 5 t three rows of small tuyere coke bed height 1200 ~ 1400 mm, batch material 280 kg, 20 kg, limestone layer 40 kg, coke.
The amount of coke and coke layer of at the bottom of the molten iron temperature, carbonization, and melting rate has a significant influence, should strictly control.
Choose a higher amount of scrap to, in order to drop carbon equivalent, is advantageous to the casting
thicker white section.
Inoculation with # 4 rare earth alloy, in order to prevent the lid, and 2 times in carrying bag;
Aimed at refining arrange grain, the mechanical properties of castings, marching to enhance patient.
Produce of wear-resistant white cast iron parts, ledeburite in the arrangement of the content is 70% ~ 80%, 51 ~ 53 HRC hardness.
Casting using life spans across 14400 h, greatly crossing of high manganese steel lining plate and the use of carbon steel lining board become old, yea, tons of capital decrease, and the product is also mine equipment wear-resisting material iron forging, lining and lining brick not lost a good choice.
Choose wet pouring lining, lining brick choose dry type casting.
Lining brick, lining board ingredients share (
The mass fraction)
: ferromanganese, 4.
5% : pig iron for steel making, 30%;
6% scrap, ferrosilicon, 70%;
Contains in carrying bags of inoculation amount)
4 # of rare earth alloy, 0.
Contained in the iron groove of inoculation and carry the package to secondary inoculation in quantity,
Nanjing foundry co. , LTD. , with annual production heat resistant, wear resistant steel, carbon steel, low alloy steel casting, grey iron castings, ductile iron parts, stainless steel castings and all kinds of large and medium-sized castings 80000 tons of capacity, is the domestic market competitiveness of the cast steel, cast iron, stainless steel castings and profile production base.
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Nanjing BoQiao Machinery Co., Ltd. has an array of branches in domestic for munufacturing casting machinery.
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